DPB2 Technical Reference
Contents
1. Keypad Encoder A 4x4 keypad encoder interrupts the processor when debounced keypad data is ready A patch area JP17 is provided to remap keypad row and column order Keypad connection is an 8x1 header LCD Interface 16x1 header supports intelligent 4 or 8 bit parallel interface LCDs LED backlight current limiting resistor and LCD contrast adjustment High Current Outputs Four 350 mA 35 V open collector relay drivers with snubbing diodes Connection via the 8x2 system I O header Buffered Digital Inputs Four rugged inputs withstand 30 volts and include internal 3 Kohm pulldowns A jumper block connects these four inputs to the processor timer and interrupt pins or leaves them unconnected Connection is via the 8x2 system I O header ADC An 8 bit analog to digital converter with a variable 2 5 to 5 0 reference voltage and an adjustable input attenuator At the 5 0 volt reference setting resolution is 19 6 mV per bit ADC input connection via 2 pin header or the 8x2 system I O header Prototype Area 319 plated through holes on 100 centers in an 11 by 29 grid for any size DIP or PGA plus two rows of 29 pads offset by 050 to accommodate ZIP or SIMM sockets Heavy power and ground busses on 025 headers Every pad is surrounded by ground plane perfect for low noise analog circuitry Expansion An 8x2 system I O header provides an easy way to cable digital and analog I O and power from to external equipment All processor2. EXT ADC Input to the R10 amp R9 attenuation network which is sampled b 20 DPB2 Technical Reference October 31 1996 Systronix Inc JP15 VO CONNECTION PINOUT ee Soe e 5 VDC Regulated VCC from on card regulator U12 System ground MAPPLICATION EXAMPLES Example software for interfacing to the ADC typical keypads and LCDs etc is in the archived files on your release disk To set and test the Dallas TimeKeeper use ECC4 BAS DS5000 and DS2250 or ECC4_51 BAS for 2251 and 2252 Applications for a DS2250 32 and DS3000 32 are interchangeable since these parts are functionally identical Due to differences between the parallel interface Timekeeper used in the DS2251T 2252T and the serial Timekeeper used in the DS2250T and DSSOOOT you cannot simply declare a different target and compile the same program for either family We have included separate examples for the 2251T 2252T parts The way in which DPB2 s on board peripherals are accessed is identical for all Dallas processors so all of that code can be used on any of the processor types This enables you to switch between 2251 2252 2250 or 5000 processors and use the same keypad LCD ADC and relay driver code We provide a complete set of I O drivers for accessing the on card peripherals such as the ADC relay drivers digital inputs and off card peripherals such as the LCD keypad serial I O etc These drivers are included in your DPB2 disk Updates ar
3. Inc 28
4. for example help load for detail on LOAD At the TE prompt press the ESC key first to enter TE command mode then type help 3 You MUST use the correct Dallas loader KIT5K for DS5000 and DS2250 K2 for DS5001 DS5002 DS2251 and DS2252 Using the wrong loader will give unpredictable results such as inability to access any BASIC variables in data memory If you are using the DS5000 or DS2250 family with the KITSK loader do NOT use the PROGRAM command There is a bug in the KITSK loader The bug sometimes but not always fails to properly set the RANGE and PARTITION of DS5000 or DS2250 parts However this 1s not really a problem since the PR PROGRAM command is not the best way to load programs anyway It is quicker and requires far less repetitive typing if you use loader script files which contain the LOAD and optional VERIFY commands Loader script files work in a manner similar to DOS BATCH files Loader Script File Tips amp Example The Dallas loaders both KITSK and K2 can be invoked with a script file as a command line parameter for example at the DOS command line type KIT5K mycode don t type the quotes to invoke KIT5K with the script file MYCODE Command lines and script files are not case sensitive This starts the loader KITSK and instructs it to open the DOS file mycode All loader commands in the file will be executed exactly as 1f you had typed them by hand Loader script files are very similar to D
5. Powers LCD logic and controller not the res backlight a Input LCD contrast adjustment driven by the VR1 wiper Input Register select Low selects instruction register for write busy flag for read High selects data register for read or write 5 R W Input Read write strobe Low to write to the LCD high to read from the LCD ffs fm Enable strobe Initiates all LCD access cycles Input Output LCD data bit 0 All DB lines float high impedance when the enable strobe is low _ Input Output LCD data bit 1 DB2 Input Output LCD data bit 2 DB3 Input Output LCD data bit 3 Ba Input Output LCD data bit 4 Bs Input Output LCD data bit 5 oe Input Output LCD data bit 6 Input Output LCD data bit 7 LEDA LED Power LED backlight anode needs a current limiting resistor in most cases Some LCDs have a built in limiting resistor including those currently supplied by Systronix this is subject to change LEDK LED Power LED cathode generally grounded Or drive this with an open collector relay output to turn the backlight on and off under firmware control If you are using an LED with no backlight it may be easier to connect a ribbon cable to the JP14 or U8 headers if you snip off the unused backlight pins 15 and 16 LED Backlights 12 DPB2 Technical Reference October 31 1996 Systronix Inc Densitron LCDs do not use pin 16 of the LCD connector since they share a common ground pin 1 between the LCD logic and the LED
6. Static or Under voltage If you will be accessing machinery or equipment attached by cables to the address and data busses of DPB2 you will need to buffer them or at least protect them against static or under voltage conditions before they leave DPB2 Do not wire controller pins directly to a cable which drives a printer or other device Page 60 of the 1993 Dallas Soft Microcontroller Data Book shows a combination of schottky diodes and 1K ohm resistors to protect processor port pins from negative voltages Keep LCD cables less than 12 inches long since these are directly driven by Port 0 It is possible to drive cables as long as 15 feet we ve done this just to prove a point but bus settling time and ringing become significant Long cables add capacitance which increases settling time on Port 0 Static discharge is also a concern since the static could directly contact the processor device pins Mount the LCD in an enclosure or panel which will withstand or redirect a static discharge The keypad is isolated from the processor by the 74C922 so you do not need to worry about keypad cable length of a few feet Relay driver cables can safely be several feet in length since the relay drivers are designed to drive high capacitance loads The DPB2 buffered digital inputs have a 1489 type buffer the same as used on commercial RS 232 ports It is quite robust and can withstand a DC level of up to 30 volts as well as 500 volts or more of static dis
7. except for schematics which are only available in the printed version of this manual Enclosures Also included is a dimensioned drawing of our enclosures These are precisely molded two tone plastic enclosures machined to accept a 4x4 keypad and an LCD All of our 100x160 mm Eurocards bolt right in to these enclosures with a 4 40 x 3 8 machine screw in each corner The end panels of the enclosure are removable A variety of end panels are available from Systronix or you can make your own out of sheet plastic or 062 or thinner circuit board material We are continually developing enclosures with other I O configurations please contact us if you have special needs New products and accessories will be appearing first on our Internet site End Panels The enclosure normally ships with blank end panels We have other panels available one contains two DB9 connectors and a 5 5x2 5 mm power jack Another features an AMP 50 conductor CHAMP receptacle and a short ribbon cable terminated with a 25x2 IDC receptacle We also have an end panel with a DB25 and a 16 way cable terminated in an 8x2 IDC receptacle This plugs into the JP15 8x2 I O header on DPB2 Complete drawings and photographs are available on the Internet as PDF files at www systronix com Sample Keypad Legends We ve included a full size keypad legend which you can cut out and install in our 4x4 keypads 27 DPB2 Technical Reference October 31 1996 Systronix
8. output from DPB2 TE starts the Dallas terminal emulator In the terminal emulator press and release the ESC key to enter command mode and then type DTR to turn off the DTR line When you press ENTER to complete the DTR command TE changes back to communication mode rather than command mode The DPB2 LED should change from red to green You should see a message on the status line at the bottom of your PC s screen and the sample program should be off and running with output something like this Py SAO A DPB2E DS5000 DS2250 family serial output test ABCDEFGHIJKLMNOPQORSTUVWXYZabcdefghijkimnopqrstuvwxyz0123456789 SS amp _ Example Program DPB2E_E DPB2 Technical Reference October 31 1996 Systronix Inc MDPB2 I O MAP The DPB2 on board peripherals use some of the processor port pins These are described in the following table PROCESSOR PINS USED BY DPB2 I O PERIPHERALS Note this l O map may change in future revisions Serial I O Keypad ADC LCD Digital Relay Encoder Inputs Drivers The main Keypad data PO0 4is the LCD data Digital RS232 port DO D3 use ADC serial uses Port 0 input O uses P3 0 and Port 0 bits data bits 0 7 can use P3 1 RXD and 0 3 P0 0 PO 0 P0 7 P3 2 TXD P0 3 INTO The serial Keypad P1 0isthe LCD RS Digital Relay printer output interrupt uses ADC chip uses P1 4 input 1 register uses P1 7 the processor select can use strobe is INT1 input active low P3 3 P1 1 P3 3 IN
9. ports and I O pins are brought out to labeled 025 square headers on 100 centers An HCT573 demultiplexes the address and data bus for external memory access Easy Program Loading Serial program loading can be initiated by on card pushbuttons or the RS232 DTR line Serial loader software is included A bicolor LED glows green when running and red when loading Size Standard 100x160 mm single Eurocard size hundreds of enclosures available some stocked by Systronix including RF shielded NEMA rated etc Environmental Commercial temperature range of 0 to 70 degC Support amp Warranty Unlimited friendly technical support One year warranty against defects rev 1996 Oct 14 bab DPB2 Technical Reference October 31 1996 Systronix Inc DPB2 Thank you for purchasing the Universal Dallas Development System DPB2 The current revision of the DPB2 circuit board is E DPB2 Dallas Proto Board 2 is the first system specifically designed to support the entire Dallas Secure Microcontroller family The unique arrangement of three sockets enables you to use all three Dallas package types with one board and change between them in seconds DPB2 with BCISI was voted one of the 100 Hot Products by readers of EDN Magazine DPB2 is ideal for experimentation and development as well as incorporation in a finished product DPB2 is designed to work with any of the Dallas Soft Microcontrollers In 1996 Dallas began referring to
10. special ways compared to generic 8051 processors Please refer to the Dallas Soft Microcontroller Data Book 1993 or the new Secure Microcontroller and BCI51 compiler documentation for the Dallas processors Recommended Peripheral Addressing If you wish to add more peripherals to DPB2 we recommend that you use the approach we have taken with the existing DPB2 peripherals We use PORTO as the bidirectional data bus and other pins from PORT1 and PORT3 as chip enables and strobes You can use the WR and RD pins P3 6 and P3 7 as external read and write strobes and drive them explicitly with firmware Generic 8051 processors do not have external data memory on board Dallas processors do This makes traditional 8051 memory mapped I O less attractive for Dallas processors especially those with 128 KBytes of memory On Dallas targets with a full 64 KBytes of data memory and some with 32 KBytes of data memory you can t memory map I O without losing access to a block of your on board data memory A notable exception is the DS2251 which has a separate byte wide peripheral data bus with 15 address lines and two chip selects This peripheral bus is completely independent from the processor ports PORTO PORT1 PORT2 and PORTS Dallas processors have a wide variety of memory map options which are too detailed to repeat here Please refer to the Dallas Soft Microcontroller Data Book 1993 or later for all the details Protecting Processor Pins from
11. these as the Secure Microcontrollers Systronix has other development boards designed for the Dallas High Speed Microcontrollers DPB2s are in use world wide in development projects as diverse as DNA replicators liquid dispensing systems vending machines and electric vehicle motor controllers M O Driver Files Example programs and I O include files for DPB2 revision E have the letter E in their name such as ADC_E INC Comments in the file itself also tell you for which version of hardware the file is intended Our web site has the latest versions of DPB2 I O drivers Mi Systronix Web Site amp Forum Our web site www systronix com is the main repository for new DPB2 example code and I O drivers There are links from the web site to an ftp file area There is also a forum of Systronix users on the Internet Our web site has information about joining Mi Getting Technical Support Our technical support is free We believe good support starts with good written documentation If you can t find the answer in our documentation then try the FAQ on the web at www systronix com send e mail to support systronix com call us at 801 534 1017 or Fax us at 801 534 1019 When you contact us please tell us about any errors or weaknesses in the documentation so that we can improve it in the next revision If you can please contact us by e mail first You can attach a file of source code and captured output use MIME encoding if possible to
12. 371 4000 or www dalsemi com or follow the links from www systronix com What is the Dallas Serial Loader The Dallas processors have built in ROM support for serial loading of HEX files The Dallas processors serial loader is automatically activated by DPB2 s special reset load hardware Using the included software you can reprogram a Dallas Soft Microcontroller in seconds over its serial port without changing jumpers or unplugging and erasing EPROMs You can encrypt and lock your program or data to prevent unauthorized tampering in fact many bank teller machines are based on the DS2252 Secure Microcontroller What is the BCI51 PRO BASIC Compiler the easiest and quickest way to program an 8051 QuickBASIC users will feel right at home BCI51 PRO allows you to program all 8051 and 8052 family parts and is the only high level language with specific keyword support for the Dallas processors BCI51 PRO includes excellent documentation and support including a complete suite of DPB2 I O drivers Why struggle with C or assembly With BCI51 you can write your application in days instead of weeks What if Want a Custom DPB2 We can quickly customize DPB2 hardware or firmware to meet your needs and deliver a working prototype in two to four weeks How do order Please refer to our Product Matrix amp Price List and Order Form for detailed option and ordering information Allsystems include DPB2 user manual Stocked
13. DPB2 Technical Reference Document Revision 1 3 MA Complete Reference to Using amp Programming the Universal Dallas Development System DPB2 LIMITED WARRANTY The information in this manual is subject to change without notice and does not represent a commitment on the part of Systronix Inc Systronix Inc makes no warranty express or implied for the use or misuse of its products which are provided with the understanding that you the user will determine fitness for a particular application Systronix assumes no responsibility for any errors which may appear in this manual No part of this manual may be reproduced or transmitted in any form or by any means electronic or mechanical including photocopying and recording for any purpose other than the purchaser s personal use without the written permission of Systronix Inc Systronix reserves the right to revise this documentation and the software and hardware described herein or make any changes to the specifications of the product described herein at any time without obligation to notify any person of such revision or change TRADEMARKS Systronix is a registered trademark of Systronix Inc INTL and Intel are registered trademarks of Intel Corporation Microsoft and MS DOS are registered trademarks of Microsoft Corporation OrCAD is a trademark of OrCAD Systems Corporation Systronix Inc 555 South 300 East 21 Salt Lake City UT 84111 TEL 801 534 1017 FAX 801 534 1019 Int
14. O The Dallas Secure Microcontrollers have a hidden internal ROM which gives them their built in ability to be reloaded in circuit via their serial port This hidden ROM is accessed by resetting the part in a special way to invoke the serial load mode Details on invoking serial load mode are in the Dallas data book You can easily add this ability to your own custom hardware DPB2 has this serial load mode ability built in When in serial load mode your application is mapped out and the hidden internal ROM is mapped into the controller s memory When the controller is reset the hidden ROM is disabled completely and your program and data space is mapped back into the controller s memory It s a very clever system The loader ROM and your application can never interfere with each other This is why your application program running on the Secure Microcontroller cannot call or otherwise execute the serial loader Your application and the serial loader are mutually exclusive DPB2 and the Dallas PC software use DTR coming from your PC to trigger the serial load mode When DTR is asserted DPB2 s status LED glows red When in normal reset run mode the LED is green DPB2 Technical Reference October 31 1996 Systronix Inc The Dallas loaders have on line help at both the KIT prompt and the TE level At the kit prompt just type help for a list of commands or help command to get detailed help on a specific command
15. OS BATCH files They are simply ASCII text files with one command on each line of the file Script files are a great timesaving convenience for several reasons First the PR PROGRAM command is buggy DO NOT USE the PR command It often does not set the range and partition correctly It may work fine 500 times and then fail a dozen times in a row as strange as that seems Don t ask us why we didn t write it Second a script file is faster than manually typing the commands Third you can set the baud rate as high as possible so loading is faster If your application uses a lower baud rate for serial communication the script file can set 1t back after downloading your program and before starting the loader s Terminal Emulator program Fourth since the script file can contain explicit configuration information you don t have to fuss with the CFG config files discussed below There are several script file examples on your disk They typically have the same file name as BAS and HEX program files but with no file extension Here is one example of such a script file This script file sets COM forces serial load mode It sets the download speed to 19200 baud Then it sets RAnge and PArtition Then it LOADs the file ecc4 hex Then it sets the speed of the COM port back to 9600 since that s what the program ECC4 uses Then it turns off DTR we know it was on because of the prior PGMODE Then it starts Terminal Emulator mode Th
16. Options 4 by 4 splashproof keypad and cable with connectors LCDs 4 by 20 or 16x2 supertwist with LED backlight Dallas Soft Microcontroller Data Book DBP2 BCI51 application notes Wall cube power supply 120 VAC input 6 VDC 300 mA output Rugged attractive enclosures with keypad 20x4 LCD and a variety of end panels with various I O connections Systronix A51 assembler Dallas microcontrollers in 40 DIP and 40 or 72 SIMM packages Compact buzzers and tone generators BCIS51 PRO BASIC compiler Serial loader software BCIS1 PRO and assembly language source code for reading the keypad writing to the LCD reading the ADC reading digital inputs and driving the digital outputs Systronixe Inc 555 South 300 East 21 Salt Lake City Utah USA 84111 Tel 801 534 1017 Fax 801 534 1019 www systronix com DPB2 DETAILED DESCRIPTION Processor sockets 72 SIMM for DS2251 40 SIMM for DS2250 and 2252 40 DIP for DS5000 Crystal serial and other I O ports are common to all processor sockets Power Unregulated 6 13 VDC or 5 VDC regulated 5 5x2 5 mm unregulated input power jack Regulator input and ouput are also available at the 8x2 system I O header The regulator is reverse polarity short circuit and over temperature protected DPB2 typically consumes 75 100 mA depending on processor and memory options Serial I O RS232 serial I O DB9M and serial printer output 5x2 header
17. T 1 Keypad read PO 5 isthe LCD Read Digital Relay enable strobe ADC clock strobe uses input 2 output uses P1 3 which P1 5 can use enable is shifts out P3 4 TO P1 2 LCD EN Digital strobe uses input 3 P1 6 can use P3 5 T1 Available Processor I O Pins All eight bits of Port 2 are unused P2 0 P2 7 as are P3 6 WR and P3 7 RD P3 2 INTO P3 3 INT1 P3 4 TO and P3 5 T1 can be used as external digital inputs by jumpering JP18 and JP19 appropriately RP1 pulls up PortO the ADO AD7 bus since PortO has open drain outputs Address Demultiplexer U7 an HCT573 is provided to demultiplex the address data bus The U7 demultiplexer is generally only useful on the DS5000 and DS2250 families with 64 KBytes or less of total memory MEXTERNAL MEMORY OR PERIPHERAL DEVICES The demultiplexed low order address lines AQ A7 are brought out to JP13 These address lines are not used by DPB2 peripherals Port 2 is unused and 1s the high external memory address byte AS A15 You can easily add external memory or peripheral devices to the prototype area address them with A0 A15 and strobe them with WR RD and PSEN External memory or DPB2 Technical Reference October 31 1996 Systronix Inc peripheral devices will need to share the data bus Port 0 DO D7 If you wish you could add a buffer such as an HCT245 between PortO and other data devices Please note that Dallas devices access off chip data or code memory in
18. at s it Notice that the example doesn t use VERIFY I ve never had a verify fail in over 3 years and not using it cuts the programming time in half Note that the PGMODE command is NOT the same as PR command PGMODE forces DTR on regardless of its current state The DTR command toggles DTR so it is only useful if you are certain of it s current state The loader assumes all RANGE and 4 DPB2 Technical Reference October 31 1996 Systronix Inc PARTITION values entered are in hexadecimal format Don t enter decimal numbers or the loader will use incorrect locations Suppose this file name is ECC4 with no extension to keep it short Invoke it from the DOS command line kit5k ecc4 Here s the contents of script file ecc4 com 1 pgmode speed 19200 ra 8000 pa 6000 load ecc4 hex speed 9600 der te You can make a script file for every program you will be loading frequently and give it the same name as the program without an extension And here s a final tip rename KITSK EXE to K1 EXE then your loaders are K1 for the DS5000 family and K2 for the DS5001 2 It saves some typing and makes the names consistent KIT5K vs K2 The K2 loader sets additional memory partition control bits of the DS5001 2 family The KITSK loader does not understand the newer Dallas parts Using the KITSK loader with DS2251 or DS2252 parts will not properly set the memory map Your program MUST have a properly configured memory map in o
19. backlight DPB2 E 1s designed so that both the Densitron and 2 conductor LED backlights are correctly powered Resistor R6 provides backlight current limiting Forward voltages of LED backlights are typically in the range of 4 0 volts A 10 ohm R6 thus provides 100 mA of backlight drive current 20x4 LCD with LED Backlight The Systronix 20x4 LCD with LED backlight currently has a built in current limiting resistor Earlier Systronix LCDs did not We will ship the proper LCD DPB2 R6 combination Call us or check the Internet for current version details This LED backlight uses both pin 15 and pin 16 of the DPB2 LCD connector You can add a resistor to R6 to reduce the power consumption of the LCD backlight The LCDs Systronix provides are chosen for high contrast wide viewing angle and even efficient LED backlight Our LED backlights use less than half the current of some name brand LCDs 16x2 LCD with LED Backlight The Systronix 16x2 LCD with LED backlight has its own built in typically 27 ohm current limiting resistor so it does not require current limiting resistor R6 This LED backlight does not use pin 15 and pin 16 of the DPB2 LCD connector It derives the LCD LED backlight power from pins and 2 of the LCD connector LCD Drivers Files LCD INC include a library of routines mainly for a 20x4 LCD File HELLO242 BAS includes sample code for a 24x2 LCD LCD162 XXX are sample programs for a 16x2 LCD Other drivers may be on your dis
20. charge MPOWER SUPPLY The power input jack is 5 5 x 2 5 mm with center terminal positive and the sleeve negative 10 DPB2 Technical Reference October 31 1996 Systronix Inc The DPB2 voltage regulator will run cool if your supply is in the 6 to 7 volt RAnge If you are using a lot of high current devices in the prototype area you may need a larger supply The DPB2 card draws less than 100 mA without an LED backlight LCD An LED backlit LCD can add an additional 200 mA depending on the value of backlight current limiting resistor R6 If you provide your own power supply be sure it is a DC voltage of 6 to 13 volts Some wall cube power supplies are actually AC transformers and may damage DPB2 A 6V 800 mA supply is included with your assembled DPB2 order If you provide your own supply allow 100 mA for DPB2 plus an additional 100 to 200 mA if you will be using an LCD with LED backlighting LED backlights vary greatly we have seen some as high as 400 mA on a 20x4 LCD The 20x4 LCD provided by Systronix typically draws 100 to 120 mA Higher power supply input voltages will work but will cause the regulator to dissipate any wasted power For example if the DC input is 12 volts and you are using an LED backlight at 200 mA and the DPB2 with prototype area circuits draws 100 mA then the regulator will dissipate 12 5 x 300 mA 2100 mW or 2 1 watts This will feel quite warm to the touch With a 6V supply such as we sell the regulato
21. d on a regular basis Start Simple Start with a simple program get it working and then add complexity in modules Try to add new functions as subroutines which you can call or not call to easily isolate suspected problems Exception Handling Take advantage of the BCI51 ONERR instruction to provide run time error handling Print the error code to an LCD or to the serial port so that you at least know what error occurred All embedded applications should have run time exception handling Good exception handling is one hallmark of a good programmer Exception handling is a difficult topic and highly application dependent so it is hard to make specific recommendations Quick Diagnosis Table Here are some of the most common DPB2 symptoms and typical solutions These are not the only explanation for these symptoms but are the ones we ve encountered the most often Over half of our DPB2 support calls are from users who didn t read the loader and configuration instructions before trying to load a program Most loading problems are the result of using the wrong Dallas loader or having an incorrect configuration for the target processor DPB2 QUICK DIAGNOSIS TABLE SYMPTOM EXPLANATION SOLUTION DEMODS5T provided with DS5000TK and the DPB2 Dallas Memory partition for DEMODS5T is different from DPB2 samples Load the DPB2 sample programs with the provided script files to properly configure the processor memory map After loading a HEX
22. d press the reset switch S1 The LED should change to green and DPB2 should begin running Some PC software asserts DTR upon exit so you may need to disconnect DPB2 from your PC when you are not running the Dallas serial loader software File Extensions SRL and INC The file extension SRL stands for SouRce Library SRL files contain serial I O drivers math operations and other library support code to implement the BASIC language syntax in BCI51 programs Include files with an extension INC are used to implement functions which are not part of BCIS1 BASIC such as LCD access analog to digital conversion keypad input and so forth First Program Try the following example programs as your first use of DPB2 and BCI51 Please jump ahead to the section DPB2 I O DRIVERS on page 21 and read it then return here DPB2 Technical Reference October 31 1996 Systronix Inc Copy the original BCIS1 file USER SRL to USERORIG SRL or some other convenient name so that you have an unmodified spare copy then copy the file USERDPB2 SRL to USER SRL USERDPB2 SRL is a version of the USER SRL library which has been modified to support DPB2 I O such as the LCD You MUST use the drivers in USERDPB2 SRL in order for the sample programs to properly access the LCD keypad ADC and other DPB2 peripherals Open the recommended program with an editor and make sure your target and memory map are correct as recommended in the Quick Start Con
23. da Arda Akg Bee Ber be 20 APPLICATION EXAMPLES 345024223844 22092 500900004050 90 209900 54444655 21 DPBZUVODRIVERS sos osososisososos oso sos oros oso Sos osos SS 21 LOADING PROGRAMS 0 0 eee ene eee ees 21 DEBUGGING DPB2 SOFTWARE and HARDWARE 0 0 00 eee 23 Wen O i iaai eii A dar i ar ie Gre dae G 23 SM e a dee del dee dd A 23 Exception Handling 0 ec ne eee teen ens 23 Quick Diasnosis Lable css iaa iaa ia 23 SCHEMATICS and MECHANICAL DRAWINGS 0 00 cee ees 25 SOMEIMALES eae e the eee hed ae ke hte Bh ky tls Se hee dde do Sey Bee hy Bs Ss dd Be fer dd Bes ace od dd Bel Be do acre 27 Enclostre Drawings coil AAA AAA 3 Sample Kepler a ed ee 41 SS A E EEE 43 11 DPB2 Rapid Development System Systronix Universal Dallas Development Board Rapid application prototyping and developmenttfor all the Dallas 8051 compatible soft microcontoller families with the new DPB2 from S ystronix yl a J Ee ae e i uu Y a 1 Experiment with the entire Dallas 5 13 DC power input on board N OW a SIN g e 8051 compatible processor family Voltageregulator development board on one convenient board which All processor ports broughtoutto accepts any Dallas DIP or labelled headers su DDO rts al D al as SIPstick processor Change to a 8x2 header easily connects 1 0 and different processor in seconds powerto external equipment DIP and SIPstick DPB2isa versatile singl
24. e available free of charge on the Systronix Internet sites www systronix com and ftp systronix com MDPB2 I O DRIVERS IS Be sure you use the file USERDPB2 SRL to take advantage of the LCD I O support for DPB2 Copy USERDPB2 SRL to USER SRL and the next time you compile a program the files in USER SRL will be used for PRINT Alternatively you can use the BASIC libraries included in files such as LCD INC If you use a BASIC CALL to a subroutine which writes directly to the LCD then you don t need the special USER SRL drivers Some of the example programs use a mixture of both approaches So to summarize USER SRL must contain drivers for BASIC instructions such as PRINTEC UI and UO An alternative approach to custom I O uses calls to BASIC subroutines in a file such as KEY_E INC to read and control the keypad The example lookup table is a BASIC subroutine called GET_KEY_VAL which uses BASIC and assembly language routines which are located in the file KEY_E INC KEY_E INC does not use the drivers in USER SRL As another example instead of writing to the LCD with PRINT you could write a BASIC subroutine such LCD_WRITE_DATA and include the assembly language to access the LCD within that routine The file LCD_E INC in fact 1s a library of such routines E OADING PROGRAMS 21 DPB2 Technical Reference October 31 1996 Systronix Inc Use the KITSK for DS5000 and DS2250 or K2 for DS2251 and DS2252 loader software provided When y
25. e board 19 2Kbaud RS232 1 0 portand 805 1 COMm pat ble soft computer with LCD and keypad 19 2Kbaud RS 232 serial printer port interfaces serial I O rugged digital 4 by 4 keypad encoder debouncer MICroco ntro ers inputs and outputs analog todigital Parallel 4 or8 bitLCD interface conversion voltage regulator and an ample prototyping area Four 350 mA 35V open collector digital outputs Add our real ti me Add our easy to use BCI51PRO Four rugged digital inputs BASIC compiler and you ll have BAS C com pl er fo r your system completed in a flash A OS Generous prototyping area for DIP the easiest embedded PGA ZIP andSIMM packages control ever Standard 100mm by 160mmsize Whatare Dallas Soft Microcontrollers Dallas soft microcontrollers are high performance low power CMOS systems that contain the equivalent of a single board computer in one compact SIP or DIP package An embedded lithium cell preserves the contents of the on board code and data memory up to 64 Kbytes of each for 10 years with no external power A T suffix DS2250T DSSOOOT etc indicates a real time clock and calendar chip which keeps time for 10 power off years Because system code and data memory is on board I O ports need not be used for an address and data bus Other unique features include an on board serial loader watchdog timer power fail interrupt and flexible power up and restart options Contact Dallas Semiconductor at 972
26. ernet www systronix com email info systronix com Copyright 1993 1996 by Systronix Inc All rights reserved Revision 1 3 October 31 1996 A WORD FROM THE AUTHOR This manual was created using WordPerfect 7 0 Schematics were created with OrCAD SDT III Postscript output was obtained from an Apple LaserWriter IINT Graphics were created with Generic CADD Bruce Boyes Systronix Inc DPB2 Technical Reference Systronix Inc Complete Solutions for Rapid Development of Embedded Control Systems Document Revisions 1 3 Changed programming instructions to recommend not using PR command Cleaned up some typos and error in reference to relay outputs Added references to internet site Removed A51 assembler documentation it is now a separate document Table of Contents DBBZ nd stdnadedcinacd ad atad ad eed dead tada l VOD par E E S EE EES aie ane are nies etarras l Systromx WebSite Forum aaa ae l Gemine Technical OU OE bid l INSTALL BOIS sesosassinnasosa cacaos 2 DPB2 Example Program Files o ooooooooooo eee eens 2 PROCESSOR INSTALLA HON scsrosdiradradra arder diran rra 2 13223012232 JUDE 223 dc RARER eee eee eee eee ee 2 DALLAS SERIAL LOADERS IMPORTANT NOTES 0 0 000 0005 3 What are the Dallas Serial Loaders 2 0 0 0 ee ees 3 Loader Script File Tips amp Example 0 0 0 cece ee eens 4 B Bs Sy Cees Se OEE 8 ee DER oe oer A OER BEE OER GER SO ORIN eR a na 5 Dal
27. figuration table Leave baud rate unchanged since 1t should be correct for the Dallas loader software script files which we provided 20x4 LCD DPB2E_X BAS for DS2250 or DS5000 targets DPB2E_X1 for 2251 and 2252 targets The X 1s the current revision of the program E at the time of this writing but may be different on the disk you receive 16x2 LCD LCD162 BAS for DS2250 or DS5000 targets LCD162_1 BAS for 2251 and 2252 targets No LCD ECC4 BAS for DS5000 and 2250 targets ECC4_51 BAS for DS2251 and DS2252 targets This program is good for initializing the embedded clock and calendar of new Dallas processors RECOMMENDED QUICK START CONFIGURATION All numerical values are hexadecimal except RANGE values of 64 and 128 which are KBytes a BCI51 Compiler Configuration Dallas Loader Configuration Processor Target Code Data Loader Start Start DS5000T DS5000 NE 6000 KIT5K 8000 6000 32 T DS2250T DS2250 6000 KIT5K 8000 6000 32 T 8000 DS2250T 64 DS2251T DS2251 8000 K2 64 8000 64 T DS2251T DS2251 K2 128 128 T DS2252T DS2252 8000 K2 64 8000 64 T DS2252T DS2252 K2 128 128 T First be sure that your sample program has the correct TARGET and DATA START values For Dallas targets CODE START should always be OH Refer to the table 7 DPB2 Technical Reference October 31 1996 Systronix Inc above for some guidelines Compile your program by invoking BCI51 on it For example
28. file use the STatus command to loaders runs OK but none of the DPB2 sample programs do LCD is blank or dark LCD doesn t display any characters in my program but the LCD worked OK with the sample program shipped with DPB2 contrast needs adjustment DPB2 user I O drivers are not installed 23 check the memory configuration Use the PARTITION and RANGE commands if necessary to properly set the Dallas processor memory map Be sure the range and partition match your program s CODE and DATA START values Refer to the table on page 7 use a small screwdriver to adjust the contrast potentiometer VR1 located next to the LCD connector Copy USERDPB2 SRL to USER SRL and recompile your program USERDPB2 contains the DPB2 LCD driver used by the PRINT instruction DPB2 Technical Reference October 31 1996 Systronix Inc DPB2 QUICK DIAGNOSIS TABLE SYMPTOM EXPLANATION SOLUTION The DPB2 LED will turn RED when DPB2 is in serial load mode At the KIT5K or K2 KIT gt prompt try toggling the DTR line with the DTR command The DPB2 LED should change from green to red and back as you repeatedly type DTR If not your serial cable is not correct Are you using the right COM port Is DPB2 connected DPB2 is not in load mode or serial connection is broken Dallas loader gives a prompt lost error message DS5000 and DS2251 2 have different memory configurations Program worked on DS5000 but not
29. hould both be OH The Dallas loaders only accept addresses in HEX without the trailing H In other words a loader address of 6000 is 6000H not 6000 decimal The exception is 128K parts in which you enter the RANGE as 128 and PARTITION as 0 Yes that s potentially confusing and inconsistent and no we re not responsible When you change your BASIC program s DATA START and if you are not using a script file with explicit RA and PA settings and are using the PR command the Dallas CFG file does not automatically change too You must either manually edit or delete the CFG file if you change your program s memory map or install a different Dallas processor If you don t the Dallas loader will load your new compiled program into memory at the wrong place All sorts of weird things can happen as data and code conflict with each other when you try to execute your new program A common symptom of this type of error is that serial I O pointers wander through code space printing everything they find If your program s serial I O acts bizarre check that your memory map CFG file and your BASIC program s memory locations are in agreement Or better yet use a script file and don t use the PR command See the notes about this starting on page 3 22 DPB2 Technical Reference October 31 1996 Systronix Inc E DEBUGGING DPB2 SOFTWARE and HARDWARE Internet FAQ There is a FAQ Frequently Asked Questions for DPB2 on our web site It is update
30. if you are using a DS2250T target and a 20x4 LCD at the DOS command line type BCI51 DPB2E_E o The switch o the letter o not the numeral 0 invokes the BCI51 optimization option After the compilation is complete this will create a file DPB2E_E HEX Connect a standard all pins wired straight through serial cable from your PC to DPB2 Do not use a null modem cable pin 2 TXD and pin3 RXD swapped Before you use a script file try it one time manually so that you understand what the script file does Start the Dallas loader in the DS2250T case KIT5K Type the PC s COM port you are using such as COM 1 The LED on DPB2 should switch from green to red to indicate loading If the LED remains green type PGMODE to force DPB2 into load mode Now type Sdi for status You should see a couple of lines of configuration information If the range and partition are not correct for your program refer to the table above change them with the RANGE and PARTITION commands You can save some typing by using their short forms RA and PA For example for a DS2250T 32 processor with the program DPB2E_E type RA 8000 PA 6000 You can use the ST command again to verify that the values are correct If they are type LOAD DPB2E_E HEX The program will load If you wish you can type VERIFY DPB2E_E HEX to verify that the program in the controller is the same as the HEX file on your PC Now start the Terminal Emulator so that you can see
31. k Current drivers are available from our Internet site LCD Enclosures Currently our enclosures are available for both 20x4 and 16x2 LCDs The 20x4 LCD is more popular since it fills the enclosure width better and is more aesthetically pleasing The 20x4 LCD is more practical for creating multi level menus and detailed data displays than the 16x2 The 16x2 is smaller and less expensive E KEYPAD USE Connect a matrix pinout keypad with up to 4 rows and 4 columns to the 1x8 header U10 Keypads are available from Systronix and many electronic supply distributors Membrane keypads with a flex cable tail usually have a color dot or arrow on pin 1 of their 1x8 receptacle JP17 is provided to map your keypad s row and column order to the U9 keypad encoder s input pins JP17 has rows 1 4 labeled as X1 X4 and columns 1 4 are Y1 Y4 JP17 has straight through connections on the back side of the PC board connecting its even pins which come from the keypad header U10 to its odd pins which are connected to the 74C922 keypad encoder Our enclosure 100205 100 has a recess milled to accept our 4x4 keypad 100222 100 If your keypad requires significantly different row and column wiring you can cut the traces on 13 DPB2 Technical Reference October 31 1996 Systronix Inc the back of the PC board and wire wrap solder or jumper whatever connections you need EXAMPLE KEYPAD CONNECTOR PINOUT pe rte sts ts tet If your keypad doe
32. keypad or external input Tiremoves Processor INT1 not lidia to keypad or external input TO installed gt External input 0 to processor INTO P3 2 external interrupt O lO installed External input 2 to processor TO P3 4 Timer 0 11 installed External input 3 to processor 11 P3 5 Timer 1 Processor INTO INT1 TO and T1 not connected to any external inputs MARELAY DRIVER OUTPUTS Relay driver pins are available on the JP15 8x2 I O connector A table of pin designations is on page 20 You should tie Vk to the supply voltage which powers your relay outputs For example if you are driving relays from a 12V supply tie Vk to the source of the 12V supply This will tie the snubber diodes in the relay drivers to the 12V rail The outputs can sink a maximum of 500 mA and hold off 50 Volts Nominal ratings are 350 mA at 12 20 volts If you will be driving all outputs simultaneously limit each output to 250 mA If you wish outputs can be wired in parallel for greater sink current capability Since these are open collector outputs you may need to provide your own pull up resistor depending on what you re driving These outputs cannot source current they can only sink it The relay outputs invert so writing a 1 to a relay bit drives that output low and causes it to sink current Writing a 0 to a bit causes it to be released to float high assuming you have an external pull up resistor With no external pull up an output will float ar
33. l Be sure the mounting surface is clean some isopropyl alcohol will remove any grease or oil from plastic and metal surfaces Line up the keypad carefully since the adhesive is very permanent and cannot be easily repositioned E D GITAL INPUTS The external digital inputs of DPB2 have a robust buffer which will withstand 30 volts without damage It has internal pull down of approximately 3K ohms This 14C89A buffer inverts the input therefore a floating external input is pulled low at the buffer input and when inverted generates a TTL high at the processor pins This is convenient since the external inputs INTO INT1 TO and T1 are active low An external switch then should be wired to drive the external inputs high for an active state This will produce a low at the processor pins If you want active low external inputs you can install a 1K ohm pull up resistor pack in RP3 and a link in JP20 to pull up the external inputs External Input Jumper Blocks JP 18 and JP19 The jumper blocks JP18 and JP19 provide for mapping the external inputs and keypad interrupt to the processor INTO INT1 TO and T1 inputs 17 DPB2 Technical Reference October 31 1996 Systronix Inc JP18 amp JP19 OPTIONS means has no effect Jis smo E Keypad interrupt to processor INT1 P3 3 external T1 installed position interrupt 1 ME External input 1 to processor INT1 P3 3 external position interrupt 1 removed Processor INT1 not di to
34. las Gy Ple iiaea da akai a de be bi de bi ba de Be A Ge A a e ec a fe i A es A 5 PROGRAM VS LOAD iii 6 OUICK TAR SEI pours sins 6 Rie xtensions lt 5 Rand ING AA AI 6 Pir e BROCT e E E a a 6 DPB2Z VO MAP gariiiici Peete aai ii aiae bei AGE BERAE GB Ae di G dad ae die r Bits dia G wae ee ta Ae es 9 Available Processor I O PINs dida 9 Address Demuliplexer ad ete eee aoa 9 EXTERNAL MEMORY OR PERIPHERAL DEVICES 0005 9 Recommended Peripheral Addressing 0 0 0 0 cece eens 10 Protecting Processor Pins from Static or Under voltage o o ooo 10 POWER aaea aa ala nia ane ee a ae es ieee oe aerate ea einen tee ee ea eee eee 10 CD DISPIEAN SS ed eee 11 LEDC SiC COE We OUI 5 he cinst cir cinch nck ar ESO Ss Srnec Se Sens Ge Geers 12 LED Backi bis ee ne Be i iE 12 20x4 LCD with LED Backlight 0 0 0 0 cece een 13 6x2 LCD witht Baca Mt 0 ns dni sh a sananen Aa 13 ECOD ol os ere en na a aa ne ee a RR eR a ea 13 ECD EN OSU sE NS 13 REX PAD USE sn e e e e ds Ne Se e des Ds e Oa os 13 KEYPAD LEGENDS essere eh eA ck RRR ARA Re Re ee 16 ES IA CITES oso wav E 17 External Input Jumper Blocks JP18 and JP19 0 ee ee ee 17 RELAY DRIVER OUTPUTS 24233442430424444939494909693 905432749534 54534 18 BUZZER a Sisi 18 ANALOG to DIGITAL CONVERTER 0 0 ees 19 ADCT MON IDI 25 44 0440 4 Ghee aha ee 19 PP SCC ONIN Teese the So he dri ire kri cy Be hp ute Era drie en bores Le tn dc Sv be dd Beck hor
35. ncludes code to read the ADC Program DPB2E_B BAS demonstrates this also ADC Throughput The TLC549 ADC conversion time is typically 17 usec Total access and conversion time is 25 usec This allows up to 40 000 conversion and access cycles per second As a practical matter this is limited by the speed of the 8051 at 12 or 16 MHZ and the rate at which your application can process the ADC data The driver in ADC_E INC takes about 50 usec at 12 MHZ to read the ADC value If you store the value in memory and or manipulate it with BASIC instructions this will add more time A reasonable throughput estimate at 12 MHZ might be anywhere from hundreds to a few thousand samples per second depending on your application 19 DPB2 Technical Reference October 31 1996 Systronix Inc MUP15 O CONNECTOR The header at JP15 accepts an 8x2 polarized receptacle for easy connection of regulated and unregulated power and analog and digital I O except RS232 serial I O for DPB2 8x2 insulation displacement headers and 16 conductor ribbon cable are available from Systronix Radio Shack Digi Key and other electronics parts suppliers JP15 VO CONNECTION PINOUT is System ground 5 VDC Regulated VCC from on card regulator U12 3 DIG_OUTO Digital output 0 can sink over 350 mA at up to 35 volts Open collector has no pull up resistor 4 POR L Open collector reset driven low by DPB2 upon power up Driving low from an external source
36. o the numerical keypad on your PC The left arrow is the backspace rubout key This is the standard keypad legend layout we provide with our 4x4 keypad 100222 The easiest way to remap keys is in a lookup table The file KEY_E INC illustrates this The lookup table also appears here key_get_val gosub key_get_data FASM mov DPTR __KEY_DAT addr irn DPTR movx A DPTR lt put value into acc add A 02H adjust for Jump move A A PC get lookup value into acc sjmp OVER_KEY_TABLE Jump over data lookup data entries this translates Systronix keypad 100222 into the keys used in our HPC1 system Note that pin 1 of the keypad connector is the rightmost pin as you face the keypad with the flex cable extending away from you out of the top of the keypad 1xH are the non numeric keys DB 14H 0 del backspace DB LSH M ie te e cow DB LSH 2 down arrow DB L2H oo enter DB 06H 4 DB 09H eS DB O3H 7 6 S DB LLH 7 dec point DB O5H NE DB 08H 7 QoS DB 02H A DB 00H gt B DB 04H gt C DB 07H gt D DB 01H E S DB LOH F escape OVER_KEY_TABLE MOVX ADPTR A store value in KEY_ DAT FASM_END return If you have a 20x4 LCD program DPB2E_B BAS includes a routine which displays the original and remapped key values on the LCD 15 DPB2 Technical Reference October 31 1996 Systronix Inc E KEYPAD LEGENDS If your ordered a keypad and enclosure from us they will
37. on DS2251 or DS2252 BCI51 Pro does not support the upper 32K of a 64K DS2250T can t access the upper 32K of the DS2250 T 64 controller Serial buffers are accessing data memory which is not properly enabled Program starts but all the serial I O is a single character such as QUUUUUUUU Baud rate mismatch or autobaud not initializing properly Serial I O is garbled If program is several pages of BASIC code and your DATA START is less than 4000H you may have run out of code space My program ran OK then added more code to it now it doesn t run with a straight through cable not a null modem cable When moving a program between Dallas families be sure that you recompile with the correct TARGET and DATA START directives Use the correct loader K2 for the DS2251 2 KIT5K for the DS5000 and DS2250 Please email support systronix com or call for availability of support for the DS2250T 64 This part has a different data memory map from any other Dallas controller and is not easy to support with a high level language You can access the upper 32K which must be data memory in assembly code If you need more memory use the DS2252T 64 or 128 which are fully supported by BCI51 Code Start and Data Start do not match the configuration of the Dallas controller s memory Please refer to the Quick Start Configuration table Are you using an old HEX file which was compiled for a different memo
38. ou connect to DPB2 and DTR asserts from your PC to DPB2 the LED will glow RED when loading You do not need to use the pushbuttons when using KITSK or K2 Just use the DTR or PGMODE command to switch from LOAD to RUN modes The DTR line if active overrides the on board pushbuttons Detailed Dallas Loader instructions are provided in the Dallas data book which is included with your DPB2 Other important Dallas loader information 1s located in the section DALLAS LOADERS IMPORTANT NOTES starting on page 3 of this manual US The Kit5K PR command does not always work properly Please refer to the loader notes starting on page 3 for an explanation of the best way to load programs to DPB2 Remember that the Dallas loaders need a range and partition addresses and other memory configuration options such as encryption and locking The partition address must be the same as your BASIC program s DATA START if you are using a partitionable architecture Dallas part For example a DS2250T 32 has a range of 8000H 32 KBytes and might have a partition of 6000H In this case code is at O SFFFH and DATA at 6000H 7FFFH Your DATA START must be 6000H Only on the fixed memory map parts such as the 128K versions of the DS2251 and DS2252 can your DATA START ever be located at OOOOH In these parts RANGE is 128 this is a non hex RANGE value and PARTITION is 0 This tells the loader to use a full 64K each of program and data space Then your code and data start s
39. ound 1 volt Files RELA Y INC include code for clearing and accessing the relay drivers E BUZZER You can easily drive our buzzer part number 100201 directly from the relay driver This buzzer includes a built in oscillator all you need to do is supply power and it will buzz Just tie the positive longest lead of the buzzer to 5 volts and the negative lead of the buzzer shortest lead to the relay driver output Some of the DPB2 sample programs already assume a buzzer is attached to the least significant bit of the relay driver 18 DPB2 Technical Reference October 31 1996 Systronix Inc Asserting the relay output causes the buzzer to emit a tone The sample programs DPB2E_X BAS where X is the current revision include a routine which creates a brief audible click when a keypad key is pressed as well as a longer beep when other keys are pressed MANALOG to DIGITAL CONVERTER An 8 bit ADC is provided on DPB2 with a reference adjustment VR2 and input labeled at JP16 You can adjust the reference continuously between 2 5 and 5 0 volts This gives your conversions a resolution of 9 8 mV to 19 6 mV per bit Resistors R10 and R9 are an input attenuation network If you increase R10 you can increase the input range of the ADC Vine Vinpur RIARIO RY For example if R10 is 10 Kohms the input range of the ADC will be 0 10 volts DPB2 ships with R10 of 10 ohms in which case the input range 1s 0 5 volts FILE ADC INC i
40. probably be delivered assembled and tested with the keypad legends shown on the attached mechanical drawing 16 DPB2 Technical Reference October 31 1996 Systronix Inc The keypad 100222 100 is also available with no imprinted legends In this case it comes in two pieces the actual membrane keypad and a protective overlay with a clear area for each key You can easily create your own legends on a word processor or drawing program Copy them onto 20 lb bond paper on a laser printer heavier paper reduces tactile feedback Or you can use a color photocopy of a color inkjet print for a more elaborate custom appearance You can easily and quickly make low volume custom keypads which look like they are an expensive full custom design The keypad and its protective overlay are intended to be held together by the adhesive strips on the keypad Position your legends either in strips or a whole sheet over the keypad Peel off the adhesive release liner and position your legends Be sure your legends are small enough to leave a border of adhesive around them to hold the overlay Press the overlay carefully in place This adhesive is very tenacious so you only get one attempt at this If you leave one edge of the release liner in place you can create a pocket between the keypad and overlay to let you insert different key legends at any time Finally the keypad back also has laminated adhesive for permanent mounting to an enclosure or pane
41. r pin 20 should be pulled high JP3 in the 2250 position to enable the DS2250 s on board memory and embedded clock If left to float it will be pulled low with its internal pull down disabling the on board memory and clock and causing the DS2250 to act like a plain 8031 with no on board memory E DALLAS SERIAL LOADERS IMPORTANT NOTES You are of course eager to use your new DPB2 system but please take the time to read the following quick start and loader tool information It will only take a few minutes and could save you needless frustration The loading process is simple but it must be followed exactly and you must give the loader the proper memory map parameters These tips will help you get up and running quickly and easily It s tempting to jump into a complex application right off the bat but please run one of the supplied sample programs first This will verify that your PC cable hardware and installed software are all working together and that you understand the complete compile and download process What are the Dallas Serial Loaders The Dallas serial loaders are PC DOS programs which use your PC s RS 232 serial port to communicate with a Dallas Secure Microcontroller The loaders provide Intel HEX file transfer They also provide Secure Microcontroller configuration such as memory mapping locking etc Finally the loaders include a terminal emulator which you can use to communicate with your application via serial I
42. r LOAD command differs significantly from the PROGRAM command The PROGRAM command sets the memory partition lock bit etc and verifies the HEX file you program The PROGRAM command uses the values in the CFG file or prompts you for values if no CFG exists The LOAD command does not use the CFG file nor does it set the memory partition In other words if you LOAD a HEX file it will be stored with the same configuration values as existed previously in the target LOAD 1s significantly faster than PROGRAM If you are repeatedly editing compiling and downloading an application LOAD can save you a lot of time But if your previous program had a different memory partition LOADing a new HEX file will preserve the old settings which are incorrect for the new HEX file and your new program will not execute properly The solution is simple load the new program with the PROGRAM hexfilename EDIT command after which you can subsequently load compatible versions with the LOAD command Better yet use a script file BM QUICK START If your DPB2 is assembled and has the processor installed we have tested and initialized it with a sample program In this case simply connect any accessories such as your LCD and keypad connect the wall cube power supply and DPB2 should immediately boot up the LED should be green and the application should begin running If the LED is red your PC is asserting the DTR line Unplug the serial cable from DPB2 an
43. r only dissipates 6 5 x 300 mA 300 mW The regulator will simply shut down if it overheats and will turn on again when it cools off If you will be driving DPB2 from a 12 VDC vehicle electrical system the input voltage will typically be 13 8 VDC You may wish to add series diodes or a dropping resistor to avoid overheating the DPB2 regulator U12 Mii CD DISPLAYS DPB2 has a 16x1 0 100 inch pitch connector for an intelligent parallel interface LCD Potentiometer VR1 provides LCD contrast adjustment When you first plug in an LCD cable don t panic if your display is blank it may simply be that the LCD contrast needs to be increased If the display is black contrast is too high To the left of the display connectors pads are provided for an LED backlight current limiting resistor R6 nominally 10 ohms Pins 15 amp 16 of the LCD connectors are the and of the LED backlight Pin 15 is tied to 5 VDC through the current limiting resistor R6 typically 10 ohms Pin 16 1s ground Please note that we are phasing out our 24x2 LCD It is replaced by a 16x2 LCD available with an LED backlight The 16x2 is more typically mounted in the front panel of a machine or custom enclosure rather than our handheld enclosure 11 DPB2 Technical Reference October 31 1996 Systronix Inc LCD Connector Pinout LCD connector U8 pinout is described in the following table U8 LCD CONNECTOR PINOUT ba VSS GND System ground 2 VCC 5 Power
44. rder to run correctly Dallas CFG Files When you use the Program command without a script file remember to only use PR with the K2 loader never with KITSK the Dallas loaders set the memory map lock bit etc according to an existing CFG file if any If a CFG file does not exist the loader prompts you for input For example if you are loading program ECC4 HEX the loaders will search for ECC4 CFG and use it even if its settings are completely wrong for your program This is because the BCI51 directives such as FTARGET DATA START and CODE START do not automatically update the CFG file nor do they set the memory map and other target options yes we plan to change this in a future release of BCI51 These options must be set by the loader and you must tell the loader what these values are Therefore if you change your program s configuration you should either delete the CFG file or edit it to bring it into conformance with your new HEX file You can edit the CFG file with a text editor or by using the edit switch with the PROGRAM command pr ecc4 hex edit for example This will prompt you line by line to change the CFG information DPB2 Technical Reference October 31 1996 Systronix Inc If you use a script file then the limits of a CFG file do not apply since the script file can contain explicit range and partition information This is another reason to use script files PROGRAM vs LOAD The Dallas loade
45. ry map Dallas loader terminal emulators default to 9600 baud Use the SPEED command to change the baud rate You may need to increase the DATA START to allow more code space Compile with the I option and look at the PRN file to see the highest code address Or look at your HEX file to determine the highest code address Be sure your target partition allows enough code space Remember to change the CFG file or script file range and partition if you recompile with anew DATA START 24 DPB2 Technical Reference October 31 1996 Systronix Inc DPB2 QUICK DIAGNOSIS TABLE SYMPTOM EXPLANATION SOLUTION some data is OK Running out of data Be sure DATA START agrees with the other data is space or using XBY loader range and partition settings corrupted to a non data space Compile with the I option and look at the PRN file to see the highest data address Program runs then Run time error may Use ONERR to print the error value to the appears to hang have occurred LCD or serial port or beep a buzzer with divide by zero math a pattern so that you know when a overflow etc runtime error occurred 25 DPB2 Technical Reference October 31 1996 Systronix Inc 26 DPB2 Technical Reference October 31 1996 Systronix Inc E SCHEMATICS and MECHANICAL DRAWINGS Please note that the following pages are not included in the on line or web document version of this manual They are available as separate files
46. s not have the above pinout don t panic As long as your keypad rows and columns are connected to any rows and columns of the 74C922 you can correct other wiring easily in a keypad lookup table Examples are included in your DPB2 firmware disk For example you can fix a swap between row 1 and row 4 in a lookup table The file LCD222 INC in the example file DPB2DXMP in fact does this to correct a row swap of rows 1 and 2 in our keypad 100222 100 on the older DPB2 rev D But if a keypad row is swapped with a keypad column it may not be possible to sort this out in a lookup table Files KEY INC include other sample keypad code KEYPAD ENCODER MAPPING This is what the output of the 74C922 would be for an ideal keypad wired straight to the 922 with all keypad rows and columns matching the 922 s row and column inputs rwa o 4 e 2 rwx s o a rwx 2 6 o f u KEYPAD 100222 100 This map shows the value of each key as if it were written on the keypad As you press keys on the keypad and read their hexadecimal value from the 74C922 this is what you would obtain Note that rows 1 and 2 are swapped in the keypad Note that this mapping assumes pin 1 of the keypad connector to be the rightmost pin as you face the keypad with the connector tail emerging from the top of the pad ROWICOL 14 DPB2 Technical Reference October 31 1996 Systronix Inc DESIRED KEYPAD LAYOUT This possible keypad layout is similar t
47. sert the SIMM processors fully into the socket before rotating them into final position and snapping the metal latches into place The two plastic posts on the socket should fit easily into the two drilled holes on the SIMM module A 40 pin DIP part has pin located on the notched end of the socket closest to the RST RUN and SLD switches The DIP40 DS5000 parts have relatively fragile leads so be careful to line up the part in the socket precisely before pressing it in place There is not much clearance between the DIP40 and SIMM40 sockets so be careful when inserting DIP parts This may sound obvious but only install one processor at a time Some of the signal headers are only applicable to DS2251 or DS2252 or T Timekeeper components For example JP9 is only active with the 2251 s special peripheral bus Refer to the DPB2 schematics and the Dallas data sheets for processor pinout details JP3 2250 2252 Jumper If you are installing a SIMMA40 processor place JP3 in the proper position This jumper affects ONLY the SIMM40 socket and has no effect on DIP40 or SIMM72 parts 2 DPB2 Technical Reference October 31 1996 Systronix Inc Pin 20 of the DS2252 is the self destruct input active high No the processor won t explode if this pin is high If JP3 is in the 2250 position and you install a DS2252 processor your 2252 s program will be erased On the DS2250 pin 20 is the EA external access pin With a DS2250 processo
48. will reset DPB2 Has a 10 Kohm pull up resistor DIG_OUT1 Digital output 1 can sink over 350 mA at up to 35 volts Open collector has no pull up resistor EXT_INPO External digital input O Switches at approximately 1 volt with respect to ground Withstands 30 volts has internal 3 Kohm pull down resistor 7 DIG_OUT2 Digital output 2 can sink over 350 mA at up to 35 volts Open collector has no pull up resistor EXT_INP1 External digital input 1 Switches at approximately 1 volt with respect to ground Withstands 30 volts has internal 3 Kohm pull down resistor ES DIG_OUT3 Digital output 3 can sink over 350 mA at up to 35 volts Open collector has no pull up resistor 10 EXT_INP2 External digital input 2 Switches at approximately 1 volt with respect to ground Withstands 30 volts has internal 3 Kohm pull down resistor 11 V_CLAMP The digital output driver snubber diode terminal Tie to the same source voltage used to provide the source voltage for external digital loads 12 EXT_INP3 External digital input 3 Switches at approximately 1 volt with respect to ground Withstands 30 volts has internal 3 Kohm pull down resistor 13 DCINP_RA Connected to the input to the on card voltage regulator U12 If W you are not using the power input jack P2 this pin can be used as an input to the voltage regulator If you are using power input jack P2 this pin is a means of supplying unregulated DC from P2 to other devices such as relays and motors
49. your message If you send us an DPB2 Technical Reference October 31 1996 Systronix Inc example of a problem please make the example as simple as possible and include any necessary I O driver include files if you have modified them We try to answer all e mail within 24 hours Our web site www systronix com is the main repository for new DPB2 example code and I O drivers There are links from the web site to an ftp file area There is also a forum of Systronix users on the Internet our web site has information about joining Please feel free to contact us with any unusual questions about programming DPB2 We can probably help you approach your needs in the most efficient way That s why we re here Customers consistently give us high marks for courteous competent technical support Tell us how well we re doing for you M NSTALL BCI51 If you purchased BCI51 PRO install it now and while it is self extracting you can unpack the DPB2 hardware DPB2 Example Program Files DPB2 example files are in the self extracting archive DPB2 XMP EXE where the will be used for different versions of DPB2 example code Some of the DPB2 example files will overwrite BCI51 Pro files This is OK E PROCESSOR INSTALLATION SIMM parts insert only one way DO NOT FORCE THEM SIMM parts have a notch near pin 1 On DPB2 the SIMM sockets have pins 40 and 72 marked pin 1 is on the end of the board closest to the RST RUN and SLD switches In
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