CW12832 User Manual
Contents
1. COMME CHOM eja a aa a a RP UNA RUE ud 7 1 3 1 Serial pep 7 1 4 2 CONNGGI ON EERE 8 Meet AI SEX Connection Aak SK E 9 QE TN LIEB pce Da Wa DEN E ag a ga 10 1 3 5 0 SB Driver for VVITIOOWS a gae ag 10 1 3 6 Relay ate usce uda en eaaa nenanem 10 1 2 AVS WAM Nc taste an Dt 11 1 3 8 rest the Mod le a e 12 1 3 9 Demo Software Boot up logo 13 1 3 10 Serial Number eta noa MEC DU 16 Chapter 2 Module ana aana anana Gin suas scm anane 17 FM Ee gei 17 2 2 TURNER ER HE Tc o ah 17 CAApt r e E dioi eT 18 3 1 B iltin ELTE UTE 18 Text to CV i e c 19 EN NERO OM Etc tmc 19 3 3 T Auto Line Wrap ON 254 67 283 cesare pax teeta leant desea copus cusa 19 3 3 2 Auto Line Wrap OFF 254 68 2593 aaa cena apap 19 3 3 3 Auto Scroll ON 254 81 284 ubi andes ee 19 3 3 4 Auto Scroll O2. USB Cable Drawing 3 USB connection diagram CW12832 User Manual 9 CW L N UK CW12832 Display 1 3 4 USB Driver Linux driver for the USB version of CW12832 can be obtained at http www cwlinux com eng downloads Type in the followings only in Linux to load the driver tar zxf Id_pl2303_v0213 tar gz cd Id 2303 0212 make modprobe usb ohci or modprobe usb uhci insmod usbserial o insmod pl2303 0 Note Although the stock version of Linux driver works it has problem during high speed transfer This driver fixes the problem It is recommended to use the above driver instead of the stock driv er 1 3 5 USB Driver for Windows Latest version of USB driver for CW12832 can be downloaded at http tech prolific com tw In the website search for latest driver for PL 2303 Then install the driver according to the readme file 1 3 6 GPIO Relay Pin Assignments Drawing 4 GPIO pin assignments Pin 1 2 3 4 5 6 7 8 9 10 11 12 Name VCC 1 RST 2 GPIO GPO3 GPI1 NC INTO NC GND User can control or read status of other external I O devices through the GPIO Detail description of the GPIO and the on board relay can refer to sessions 5 5 1 to 5 5 5 RST is the reset pin of the CW12832 Connect it to 5V will reset the CW12832 INTO is reserved for future purpose It is recommended to leave it un
3. 254 3 253 Set RS232 port speed FE 39 speed FD 19200 254 57 speed 253 Sets RS232 port speed Refer to section 5 1 6 254 9 speed 253 Save user defined characters FE 4F cc FD N A 254 79 cc 253 details Save user defined characters cc ranges from 254 O cc 253 Load user defined characters FE 50 cc FD N A 254 80 cc 253 1 to 16 Load user defined characters cc ranges from 254 253 Save user settings FE 53 ud 4 bytes 2 dummy bytes FD 254 83 ud 4 bytes 2 dummy bytes 253 p N A 1to 16 Save user settings User is required to save 4 bytes at a time 254 S ud 4 bytes 2 dummy bytes 253 ud ranges from 1 to 8 CW12832 User Manual 34 CWLINUX CW12832 Display Command Syntax Default Description Read user settings FE 54 ud FD N A 254 84 ud 253 Read user settings 4 bytes are returned at 254 ud 253 Relay On FE 61 timeout FD off 254 97 timeout 253 each time Turn on relay Relay will always on if timeout 254 a timeout 253 0 However it will on for timeout seconds if Relay off FE 62 FD timeout gt 0 timeout 1 10
4. length ranges from 0x00 to Ox7A Draws a pixel at location x y x ranges from 0 dummy bytes FD 254 62 x row byte 4 from 0 to 121 and row ranges from 0 to 3 dummy bytes 253 254 gt x row byte 4 dummy bytes 253 Table 7 Summary for graphic commands CW12832 User Manual 32 CW L N UX CW12832 Display 6 3 Miscellaneous Command Summary CW12832 User Manual 33 CWLINUX CW12832 Display Command Syntax Default Description Read Model Number FE 30 FD Reads 2 bytes back from LCD 254 48 253 Read Firmware Version FE 31 FD Reads 2 bytes back from LCD 254 49 253 Soft Reset FE 56 FD Resets CW12832 254 86 253 254 V 253 Clear display FE 58 FD Clears screen of LCD and places the text 254 88 253 insertion point to top left 254 253 Backlight on FE 42 FD Turns on the backlight 254 66 253 Backlight off FE 46 FD Turns off the backlight 254 70 253 Backlight brightness FE 41 brightness FD Adjust LED brightness brightness ranges from 254 64 brightness 253 254 brightness 253 Auto key hole on FE 32 FD 254 50 253 254 2 253 Auto key hold off FE 33 FD Auto key hold on Auto key hold off 254 51 253
5. 6 o clock viewing angle Built in LED backlight 6 6 7 2 Mechanical Specifications Item Detail Unit Outline dimension Standard 1 PC Bay size Viewing area 46 0 x 10 53 mm Active area 42 21 x 10 53 mm Table 9 Mechanical Specifications 7 3 Absolute Maximum Ratings Item Min Typ Max Unit Supply voltage 4 5 5 5 5 V Supply current BL off 1 1 5 mA Supply current BL on 121 121 5 mA Operating temperature 0 50 C Storage temperature 20 70 C Humidity 90 RH Table 10 Absolute Maximum Ratings CW12832 User Manual 37 CW L N U CW12832 Display Drawing 13 Mechanical dimensions CW12832 User Manual 38 CWLINUX CW12832 D isplay Chapter 8 Appendix
6. 254 N cc 6 bytes 253 Draw vertical bar graph FE 3D col height FD 254 61 col height 253 254 col height 253 Erase vertical bar graph FE 2D col height FD Defines custom character cc goes from 0x01 to 0x10 The other 6 bytes are described in section 4 2 7 Draws vertical bar at position col of the last row with height height height ranges from 0x00 to 0x20 Erases vertical bar at position col of the last row 254 45 col height 253 254 col height 253 Draw horizontal bar graph FE 7C col row len FD 254 124 col row len 253 254 col row len 253 horizontal bar graph FE 2B col row len FD 254 43 col row len 253 254 col row len 253 Put pixel FE 70 x y FD 254 112 x y 253 to 121 and y ranges from 0 to 31 254 x y 253 Clear pixel FE 71 x y FD Clears a pixel at location x y x ranges from 254 113 x y 253 0 to 121 and y ranges from 0 to 31 254 q x y 253 Draw byte FE 3E x row byte 4 Draws a byte at location x row x ranges height height height ranges from 0x00 to 0x20 Draws horizontal bar at position col and row With length length length ranges from 0x00 to 7 Erases horizontal bar at position col and row length length
7. 254 65 brightness 253 26 5 3 Keypad Command 26 CW12832 User Manual 5 CW L N UK CW12832 Display 5 3 1 Auto Key Hold On 254 50253 26 5 3 2 Auto Key Hold Off 254 51 2532 0 lt 26 5 3 3 Keypad Mapping P 27 5 4 Non Volatile Memory Command 16 000000 21 5 4 1 Save User Defined Character in Non Volatile Memory 254 79 cc 2 8 X 27 5 4 2 Load User Defined Character in System RAM 254 80 cc 253 27 5 4 3 5 User Settings in Non Volatile Memory 254 83 ud 4 bytes 2 dummy Dytes 253 TL ane 27 5 4 4 Read User Settings from Non Volatile Memory 254 84 ud 253 28 5 5 GPIO Command LIS pr I 28 5 5 1 Turn ON General Purpose Output GPO 254 99 gpo 253 28 5 5 2 Turn OFF General Purpose Output GPO 254 100 gpo 253 29 5 5 3 Read Status of General Purpose Input GPI 254 101 gpi 253 29 Chapter 6 Command Sumiraty occurrerit cute oin nana eaaa eaaa anan nanem 31 6 1 Text Command MIRO anaa 31 6 2 Bar Charts and Graphic Command 32 6 3 Miscellaneous Command 33 b Text Mode anana sexi org 36 Chapter 7 LCD Spec
8. Scrolling banner Row 1 Row 2 Row 3 Row 4 Column 0 18 Row 0 2 Load BMP file File type he IR Monochrome Bitmap Cwlinux LCD Software Boot up logo saved 1 Width 128 Height 32 es 5 DUE Non Volatile Memory Index Write Read 4 Bytes 192 168 1 hom Show Default 0 0 0 0 Relay OFF Timeout 10 GPOOOFF GPO1 OFF GPO2ZOFF GPO3OFF Drawing 8 Boot up logo example CW12832 User Manual 15 CWLINUX 1 3 10 Serial Number Notation We provide different versions of CW12832 for user to choose User can choose the one which suit CW12832 Display to his application Here listed below is the explanation of a serial number CW 12832 Y G KS Item Meaning CW CWlinux 12832 LCD dots resolution Y Backlight color G Graphic supported K Keypad supported 5 S Serial U USB CW12832 User Manual 16 CW L N UX CW12832 Display Chapter 2 Module Programming 2 1 Command Sending Commands are sent via the RS232 port together with 2 other numbers the command starts with 254 and ends at 253 For example in PC user will need to write the following lines in order to send a complete command to LCD12232 Void LCD Write Command BYTE command LCD Write 254 LCD Write commanga LCD Write 253 2 2 Flowchart Start Command OxFE Command Stop Command 0xFD D
9. command sets the contrast of the display Contrast values are ranged from 0x00 to Ox1C 0x1C being the brightest 5 1 6 Set RS232 port speed 254 57 speed 253 This command sets the RS232 port speed specified by speed speed is a single byte which specifies a desired port speed Details of speed can refer to the following table Speed Byte Baud Rate 0x20 9600 OxOF 19200 Table 3 Baud rate table Default is 19200 5 1 7 Save screen as boot up 1000 254 106 253 This command stores whatever shows on the current screen to the non volatile memory as the boot up logo CW12832 User Manual 25 CW L N UX CW12832 Display One way to define your own boot up logo is to draw your own boot up logo on the screen using the Draw Byte command After verifying the screen is displaying the correct graphics issue the save screen as bootup logo 254 106 253 The graphics currently displayed on the screen is saved to the non volatile memory as the boot up logo 5 1 8 Display boot up logo 254 105 253 This command displays the boot up logo on the screen 5 1 9 Restore factory default boot up logo 254 107 253 This command erases the user defined boot up logo and restores the factory default boot up logo 5 2 Backlight Command List 5 2 1 Backlight On 254 66 253 This command turns on the LED backlight of the LCD with maximum brightness Default is ON 5 2 2 Backlight Off 254 70 253 This com
10. off 254 98 253 254 b 253 FE 63 gpo FD 254 99 gpo 253 254 c gpo 253 GPO off FE 64 gpo FD off 254 100 gpo 253 254 d gpo 253 Read FE 65 gpi FD N A 254 101 gpi 253 Set Contrast FE 68 contrast FD N A 254 104 253 254 h 253 Save boot up logo FE 6A FD N A 254 105 253 254 1 253 Display boot up logo FE 69 FD N A 254 106 253 254 253 Restore factory default logo FE 6B FD N A 254 107 253 254 253 Table 8 Summary for miscellaneous commands Turn off the relay Turn GPO gpo must be either 0 or 1 Turn off GPO gpo must be either O or 1 Read status of GPI gpi must be either O or 1 Set display contrast range 0x00 0x1C Save current screen as boot up logo Draw the boot up logo on display Restore factory default boot up logo CW12832 User Manual 35 CW L N U CW12832 Display 6 4 Text Mode Column 0 amp Row 0 Column 20 amp Row 0 Column 0 amp Row 3 Column 20 amp Row 3 CW12832 User Manual CWLINUX CW12832 Display Chapter 7 LCD Specifications 7 1 Features Full dot matrix structure with 128 x 32 dots 1 32 Duty 1 5 bias STN LCD positive gray Transflective LCD
11. 12832 Oxfe start byte 0x65 GP read command 0x00 Oxfd stop byte On the other hand it reads a 0 if the pin CONTROL is low Similarly GPIO reads the output of the TTL gate and feedbacks the complement of it Input CONTROL IK 5V E TTL gate 5V Relay 5V GND Input GND P Output GPIO GND GPIO 5V GND Drawing 11 Relay connected to GPIO Drawing 12 TTL gate connected to GPIO CW12832 User Manual 30 CWLINUX CW12832 Display Chapter 6 Command Summary 6 1 Text Command Summary Command Syntax Default Description Auto line wrap on FE 43 FD off Enables line wrapping 254 67 253 Character will wrap to first position of next line if 254 C 253 it reaches the end of a line Auto line wrap off FE44 FD off Disables line wrapping 254 68 253 Character will go to the first position of the 254 D 253 original line if it reaches the end of a line Auto scroll on FE 51 FD off Enables line scrolling 254 81 253 Shift entire screen up by 1 line to make room for 254 Q 253 the last row Auto scroll off FE 52 FD off Disables line scrolling 254 82 253 Set text insertion point FE 47 col row FD N A Sets the text insertion po
12. CW12832 User Man ual CW L N UK CW12832 Display CW12832 User Manual by Cwlinux Limited Published April 2007 Copyright 2007 Cwlinux Limited All rights reserved Cwlinux Limited makes no representations or warranties with respect to CW12832 or to the contents or use of this manual and specifically disclaims any express or implied warranties of merchantability of fitness for any particular purpose Permission is granted to copy and distribute modified versions of this documentation under the conditions for verbatim copying provided also that the entire resulting derived work is distributed under the terms of a permission notice identical to this one Permission is granted to copy and distribute translations of this documentation into another language under the above conditions for modified versions Linux is a registered trademark of Linus Torvalds All trademarks registered trademarks and service marks are the property of their respective owners CWLINUX CW12832 Display Revision History Author Revision Content Date IL 1 Initially released 30 7 2002 IL 2 New features added 24 2 2003 IL 3 Drawings added 6 3 2003 IL 4 New features added 23 5 2003 GT 5 New features added 20 04 2007 CW L N U CW12832 Display Table of Contents Chapter utor C 7 QNI IE IR BEN CO CAN UON RR OE n 7 k2 Features PE oom 7
13. Custom character 254 78 cc 6 bytes 253 21 4 2 8 Put Pixel 254 112 X y 293 525 donne e 23 4 2 9 Clear Pixel 254 113 x y 253 23 4 2 10 Draw Byte 254 62 x row byte 4 dummy bytes 253 24 Chapter 5 Miscellaneous 5 eaaa anana nan anae nana anane 25 5 1 General Command List 25 5 1 1 Read Model Number 254 48 253 25 5 1 2 Read Firmware Version 254 49 253 22 25 5 1 3 Soft Reset 254 86 253 25 5 1 4 Clear Display 254 88 2539 25 5 1 5 Set Display Contrast 254 104 contrast 253 25 5 1 6 Set RS232 port speed 254 57 speed 253 25 5 1 7 Save screen as boot up logo 254 106 253 25 5 1 8 Display boot up logo 254 105 253 26 5 1 9 Restore factory default boot up logo 254 107 253 26 5 2 Backlight Command EISE aeos reer etas etn pe bec tH 26 5 2 1 Backlight On 254 66 259 reor tote Sra tte Poo Rea 26 5 2 2 Backlight Off 254 70253 Og nan 26 5 2 3 Backlight Brightness
14. FF 254 82 253 unt dep Hua URS 19 3 3 5 Text Insertion Point 254 71 column row 253 19 3 3 6 Set Text Insertion Point to Top Left 254 72 253 19 3 3 7 On Underline Cursor 254 74 column row 253 20 3 3 8 Tum Off Underline Cursor 254 75 253 20 3 3 9 Move Cursor Left 254 76 253 20 3 3 10 Move Cursor Right 254 77 253 acies anana eaaa eaaa rane 20 CW L N UX CW12832 Display 3 3 11 Turn On Text Inverse 254 102 253 20 3 3 12 Off Text Inverse 254 103 2553 20 Chapter 4 Bar Charts User Defined Characters and Graphics 21 EUN NE aaa aia aa T 21 4 2 Command LISE 21 4 2 1 Initialize Wide Vertical Bar Graph 254 118 253 21 4 2 2 Initialize Narrow Vertical Bar Graph 254 115 253 21 4 2 3 Draw Vertical Bar Graph 254 61 column height 253 21 4 2 4 Erase Vertical Bar Graph 254 45 column height 253 21 4 2 5 Draw Horizontal Bar Graph 254 124 column row length 253 21 4 2 6 Erase Horizontal Bar Graph 254 43 column row length 253 21 4 2 7 Define
15. GPO will pull to low ground if user sends this command gpo is the GPO number which can be either O or 1 Drawing 10 Typical application of GPO Turn OFF 5 5 3 Read Status of General Purpose Input GPI 254 101 gpi 253 CW12832 has 2 GPls provided to read the status back through this command These 2 GPls are internally pulled up by 5V in CW12832 0 will be sent back to the host if the has a high in put which maybe a TTL 5V or a TTL voltage greater than 2V or left unconnected On the other hand 1 will be sent back if the has a low input which may be ground or a TTL voltage lev el lower than 0 8V However only TTL inputs are allowed to connected to these GPls Table 6 be low shows the DC characteristics of the GPI CW12832 if the input source is not TTL level User should notice it may burn the GPls or Parameters Symbol Min Typ Max Unit Input HIGH voltage Mis 2 5 7 V Input LOW voltage ViL 0 0 8 V Input HIGH current VIN 2 7V 20 Input HIGH current VIN 7V liu 0 1 mA Input Low current VIN 0 4 li 0 4 mA Table 5 DC characteristics of GPI CW12832 User Manual 29 CW L N UX CW12832 Display Drawing 15 and 16 showed below describe how the GPIO is connected with 2 different input sources In drawing 15 GPIO reads low when the pin CONTROL of the relay is activated Thus user will read a 1 if the following command is sent to CW
16. NODODHONDO NH B NH Se eee OMB 00000 OS US m m SSE DLL 1000920000090 User may also define 4 characters as 1 Chinese character see the example below The above Chinese character composes 4 general character spaces So user may simply define 4 characters starting from cc 0x01 to 0x04 And display the 4 characters accordingly onto the display LILILILILILI LIMERBU IN DHODHU mj m m L i f m EEEEPEN BUUUUS m j i 000090 OOOOOO INC ON 00000 Say if user wants to display this Chinese character in position 0 0 then set the following com mands Configure the 4 characters accordingly as above Set text insertion point to top left 254 72 253 0x01 0x02 Set text insertion point to the first position of the 2 row 254 71 0x00 0x01 253 0x03 0x04 4 2 8 Put Pixel 254 112 x y 253 This command draws a pixel turns on the pixel at location x y x is ranging from 0 0x00 to 121 0x79 and y is ranging from 0 0x00 to 31 Ox1F 4 2 9 Clear Pixel 254 113 x y 253 This command clears the pixel turns off the pixel at location x y x i
17. a character may refer to section 4 2 7 CW12832 User Manual 18 CW L N UX CW12832 Display 3 2 Writing Text to cw12832 When user sends a character to CW12832 it displays at location which specified before The next character will automatically display at the location next to the previous character Characters which are drawn please refer to the built in characters table showed above User is required to de fine his own character sets before he can show it 3 3 Text Commands User may use the following commands to program CW12832 It is recommended to read chapter 2 to have better knowledge of how to send these commands accordingly The numbers showed below are measured in decimal A summary of different kinds of number system is shown in chap ter 6 3 3 1 Auto Line Wrap ON 254 67 253 This command enables word wraps to next line when character reaches the end of a line Default is OFF 3 3 2 Auto Line Wrap OFF 254 68 253 Disables line wrap Character will return to the first position of the original line if it reaches the end of a line Default is OFF 3 3 3 Auto Scroll ON 254 81 253 This command allows CW12832 to shift the entire screen one line up if character reaches the last character position of the fourth line Default is OFF 3 3 4 Auto Scroll OFF 254 82 253 Character will wrap up to the first character position of the first line if the character reaches the last character position of the fourth
18. al feature of CW12832 5 51 Turn ON General Purpose Output GPO 254 99 gpo 253 User may use the GPOs to turn on other external devices mechanical relays or electronic devices gpo specifies which GPO is using It can be either O or 1 Voltage at GPO is 5V when issuing this command The maximum current which can stand for is 100mA which means the minimum output load should be 50 Ohm User should take extremely care on the resistance of the load which is driving Drawing exceeding current will damage the GPO or even CW12832 Below is an example of how GPOO connects to a mechanical relay Drawing 14 Again please make sure the coil resistance is greater than 50 Ohm Oxfe start byte 0x63 GPO ON command 0x00 Oxfd stop byte Initially is in low or ground state The 5V relay is off as the coil voltage is switches to 5V after the above command is issued The coil voltage now is 5V and Contact 1 and Contact 2 are connected Notice the diode connected in between GPOO and GND is to prevent any back emf from damaging the relay In addition a polarized capacitor 4 7 can also be added between GPOO and GND in order to reduce any noise spike voltage and back flow of current CW12832 User Manual 28 CWLINUX CW12832 Display JP1 Contact1 GND 5V Relay Contact2 5 5 2 General Purpose Output GPO 254 100 gpo 253
19. connected CW12832 User Manual 10 CW L N UK CW12832 Display 1 3 7 Installation The CW12832 can completely fit into a single 3 5 floppy drive bay which may enhance user to get more display information basically 21x4 characters within a small area The diagram drawn below shows how the module is mounting on a single PC bay insert Personal Computer 1U Appliance Server Station CW12832 Drawing 5 Installation diagram CW12832 User Manual 11 CW L N UX CW12832 Display 1 3 8 Test the Module User can test the module in the following way in Linux 1 2 3 4 T 8 9 10 11 12 Open the minicom Press Ctrl A then O to bring up configuration Choose Serial port setup in configuration Change item A to dev ttySO if user is using the serial CW12832 and is connected to COM1 Change item A to dev ttyS1 if user is using the serial CW12832 and is connected to COM2 Change item A to dev ttyUSBO if user is using the USB CW12832 and is connected to USB port Change item E to 19200 8N1 as this is the default value of CW12832 during power up Exit Serial port setup Choose Save setup as dfl1 in configuration Exit configuration Re open minicom Type some characters on keyboard and it should appear on the LCD CW12832 User Manual 12 CW L N U CW12832 Display 1 3 9 Demo Software Boot logo example User can download the demo software from http Awww cwl
20. ed Characters and Graphics 4 1 Introduction The CW12832 offers the ability of drawing horizontal graphs vertical graph and text simultaneous ly on the same screen Details of how to draw the graphs are described as the followings 4 2 Command List 4 2 1 Initialize Wide Vertical Bar Graph 254 118 253 This command defines the width of the vertical bar to 5 pixels Default is ON 4 2 2 Initialize Narrow Vertical Bar Graph 254 115 253 This command defines the width of the vertical bar to 2 pixels Default is OFF 4 2 3 Draw Vertical Bar Graph 254 61 column height 253 The vertical bar graph is drawn at position column and row 3 bottom of the screen with the height height specified The height can be ranging from 0 0x00 to 32 0x20 4 2 4 Erase Vertical Bar Graph 254 45 column height 253 The vertical bar graph is erased at position column and row 3 bottom of the screen with the height height specified The height can be ranging from 0 0x00 to 32 0x20 4 2 5 Draw Horizontal Bar Graph 254 124 column row length 253 The horizontal bar graph is drawn at position column and row with length length and goes from left to right The length can be ranging from 0 0x00 to 122 0x74 4 2 6 Erase Horizontal Bar Graph 254 43 column row length 253 The horizontal bar graph is erased at position column and row with length length and goes from left to right The length ca
21. ifications nan anaa quad c s 37 37 7 2 Mechanical Specifications akE Ra DUM NEM eee tO o nana pM Ed b BEEN REU aped as 37 7 3 Absolute Maximum FR AUS d use FOE PED Uca reU Sec cad Ene enia ER 37 Chapter 8 APpendiX 39 CW12832 User Manual 6 CW L N UX CW12832 Display Chapter 1 Introduction 1 1 Introduction The CW12832 is a graphical LCD which user can show both text and graphics at the same time via a connection of a computer appliance server The module includes a set of simple commands that allows user to develop his own LCD environment easily 1 2 Features 21 columns 4 lines text display 128 x 32 dots graphic display Text wrap scroll and inverse capability Built in characters plus 16 user defined characters Communicate over RS232 or USB interface Baud rate speed selection between 9600 and 19200 bps Programmable on off and brightness of the LED backlight Horizontal and vertical bar charts 32 bytes reserved non volatile memory spaces for user settings 6 buttons keypad 4 general purpose I Os 1 reed relay used as a host on off switch e cc cce cce ccce c Fit in a standard 3 5 floppy drive bay 1 3 Installation and Connection 1 3 1 Serial Connection Only simple connection is required CW12832 obtains power from the PC standard f
22. int to col and row 254 71 253 Set text insertion point home FE 48 FD N A Sets the text insertion point to 0 and 0 254 72 253 Underline cursor on FE 4A col row FD off Turns on the underline cursor and sets it at 254 74 col row 253 col and row 254 J col row 253 Underline cursor off FE 4B FD off Turns off the underline cursor 254 75 253 Cursor left FE 4C FD N A Moves the underline cursor to left It will move to 254 76 253 the end of the same line if it reaches the 254 L 253 beginning of a line Cursor right FE 4D FD N A Moves the underline cursor to right It will move 254 77 253 to the beginning of the same line if it reaches the 254 253 end of a line Inverse text on FE 66 FD Text inverse on 254 102 253 254 f 253 Inverse text off FE 67 FD Text inverse off 254 103 253 254 g 253 Table 6 Summary for text commands CW12832 User Manual 31 CW L N U CW12832 Display 6 2 Bar Charts and Graphic Command Summary Command Syntax Default Description Initial thick vertical bar graph FE 76 FD on Initializes 5 pixels width as the vertical bar 254 118 253 Initial thin vertical bar graph FE 73 FD off Initializes 2 pixels width as the vertical bar 254 115 253 254 s 253 Define custom character FE 4E cc 6 bytes FD 254 104 cc 6 bytes 253
23. inux com downloads The Demo Software for CW12832 is a Win32 application which is compatible to Windows 95 98 and XP Just double click and run the program Below is an example to change the boot up logo of CW12832 1 Double click and run the program After setting program to the correct port and speed change to the Demonstration tab 2 Change the Demo selection to Load BMP this would enable the section to load BMP file ws Cwlinux LCD control platform aA peo TN Demo selectia Load BMP r 1 Speed Eo 2 2 Scrolling banner Row 1 Row 2 Row 3 Row 4 Load BMP file File type Keypad 9 f Key Hold OFF i Height Load Image m Non Volatile Memory Column 0 18 Row 0 2 Bootup Logo Index E _ Miite Read 4Bytes 192 158 1 Save Show Default 0 0 0 0 GPIO Relay OFF Timeout 10 Read GPIO Read GPOOOFF GPO1 OFF GPO2O0FF GPO3OFF Nil Drawing 6 Boot up logo example CW12832 User Manual 13 CW L N U CW12832 Display 3 Click the Browse button and it will pop up a window listing the file directory Browse through the directory and select the bmp image for the boot up logo Note that the bmp image has to be in pixel size 128 width x 32 height in mono color black and white only 4 f you choose the image co
24. line Default is OFF 3 3 5 Text Insertion Point 254 71 column row 253 This command moves the text insertion point to the location which specified by column and row Column has the value ranging from 0 0x00 to 19 0x13 and row has the value ranging from 0 0x00 to 3 0x03 3 3 6 Set Text Insertion Point to Top Left 254 72 253 This command sets the text insertion point to top left of the LCD ie column 0 and row 0 CW12832 User Manual 19 CW L N UX CW12832 Display 3 3 7 Turn On Underline Cursor 254 74 column row 253 Turn on the underline cursor at position column and row Default is OFF 3 3 8 Turn Off Underline Cursor 254 75 253 Turn off the underline cursor Default is OFF 3 3 9 Move Cursor Left 254 76 253 Move the underline cursor to left 3 3 10 Move Cursor Right 254 77 253 Move the underline cursor to right 3 3 11 Turn On Text Inverse 254 102 253 Turn on text inverse mode Color of character displayed will be inversed if this option is enabled That is dots which are originally ON will be OFF and dots which are originally OFF will be ON Notice the command will only valid from ASCII character 32 to 126 It has no effect on user defined characters Default is OFF 3 3 12 Turn Off Text Inverse 254 103 253 Turn off text inverse mode Default is OFF CW12832 User Manual 20 CW L N UX CW12832 Display Chapter 4 Bar Charts User Defin
25. loppy power connector Drawing 2 User should take extremely care in connecting the power to CW12832 Reversing the polarity of connector will result in burning the CW12832 Drawing 1 shows how to connect a CW12832 to a Personal Computer a 1U appliance or a Server Station For serial CW12832 user requires to connect a DB9 cable Standard COM port cable to gether with a power cable Standard Floppy Drive Power Cable only CW12832 User Manual 7 CWLINUX CW12832 Display Drawing 1 Serial connection diagram 1 3 2 Power Connection Pin Name VCC TXD RX_D GND Drawing 2 Power connector DE Serial Cable CW12832 User Manual CW L N U CW12832 Display User should take extremely care if he intended to connect it with another type of power supply Please notice the pin assignments of the power connector before plugging the power into the CW12832 Improper connection of the powerwill burn the CW12832 The bouncing reset switch SW1 is used to reset the micro controller whenever necessary Remote reset switch can also be found in JP1 please refer to the GPIO description in session 1 3 7 1 3 3 USB Connection The Connection of a USB CW12832 is much more easier The USB version of CW12832 can be powered up by just connecting a USB cable No other power source is required as the power comes from the USB cable itself The LCD is on once the USB cable is connected
26. mand turns off the LED backlight of the LCD Default is OFF 5 2 3 Backlight Brightness 254 65 brightness 253 User can adjust the brightness of the backlight LED by sending this command with 7 levels of brightness brightness ranges from 1 to 7 and 7 is the maximum while 1 is the minimum Please notice the maximum brightness can be obtained by the backlight on command and minimum brightness is obtained by the backlight off command 5 3 Keypad Command List 5 3 1 Auto Key Hold On 254 50 253 This command enables the CW12832 to send a character back continuously for every 0 5s if one of the keys on the keypad is continuously hold down Default is OFF 5 3 2 Auto Key Hold Off 254 51 253 This command makes the CW12832 only to send a single character back when one of the keys on the keypad is pressed or continuously hold down Default is OFF CW12832 User Manual 26 CW L N UK CW12832 Display 5 3 3 Keypad Mapping CW12832 produces a single ASCII character while anyone of the keys is pressed The single bay panel buttons will produce the following characters Notice all buttons have no direct effect on the display Characters are only sent to PC s serial input User must provide a control program in PC such that correlates the button pressed to the desire function Key Character Return Up A Dec 65 Ox41h Down B Dec 66 0x42h Left C Dec 67 0x43h Right D Dec 68 0x44h Confi
27. n be ranging from 0 0x00 to 122 0x74 4 2 7 Define Custom character 254 78 cc 6 bytes 253 The CW12832 allows user to define 16 extra characters by himself These defined characters are stored in location starting from 0x01 to Ox10 with the ASCII value listed in Table 1 CW12832 User Manual 21 CW L N UX CW12832 Display The characters are defined by sending the command 254 78 cc followed by 6 bytes cc is the character number starting from 0x01 to Ox10 The 6 bytes are mapped as the following table Data Byte 1 2 3 4 5 6 LSB 1 9 17 25 33 41 2 10 18 26 34 42 3 11 19 27 35 43 4 12 20 28 36 44 5 13 21 29 37 45 6 14 22 30 38 46 7 15 23 31 39 47 MSB 8 16 24 32 40 48 Table 2 User defined characters bit mapping A 1 bit represents ON Dark pixel while a 0 represents an OFF Clear pixel For instance if user wants to define the following heart in the character space 0x01 he may need to send the fol lowing bytes to CW12832 OOS 11 OOOOOOOO Oxfe start byte Ox4e command byte 0x01 character location Ox1e Ox3f Ox7e Ox3f Ox1e 0 00 6 bytes Oxfd stop byte Once defined a character can be displayed simply by sending a value within 0x01 and 0x10 which is corresponding to the character number CW12832 User Manual 22 CW L N UX CW12832 Display DHO
28. rawing 9 Flowchart CW12832 User Manual 17 CW L N UX CW12832 Display Chapter 3 Text Mode 3 1 Built in Characters Size of all built in characters is defined by a 6 x 8 dot matrix User is required to send the ASCII code of the corresponding character in order to display it Details of the ASCII information of each character are listed as the following table A font table is available in the appendix of this manual Note UD stands for User Defined ASCII Character ASCII Character ASCII Character ASCII Character 1 UD 44 72 H 100 d 2 UD 45 73 l 101 e 3 UD 46 14 4 102 f 4 UD 47 I 75 K 103 g 5 UD 48 0 76 L 104 h 6 UD 49 1 77 M 105 i 7 UD 50 2 78 N 106 j 8 UD 51 3 79 107 k 9 UD 52 4 80 P 108 l 10 UD 53 5 81 Q 109 m 11 UD 54 6 82 R 110 n 12 UD 55 7 83 S 111 o 13 UD 56 8 84 T 112 p 14 UD 57 9 85 U 113 q 15 UD 58 86 V 114 r 16 UD 59 87 Ww 115 32 space 60 88 116 t 33 61 89 Y 117 u 34 62 gt 90 2 118 v 35 63 91 119 w 36 64 92 120 x 37 65 A 93 121 y 38 amp 66 B 94 A 122 z 39 67 95 123 40 68 D 96 5 124 41 69 E 97 a 125 42 5 70 F 98 b 126 43 71 G 99 Table 1 Characters table Apart from the built in characters listed in the above table user can define his own characters in spaces from 0x01 to 0x10 Details of how to define
29. rm E Dec 69 0x45h Cancel Dec 70 0x46h Table 4 Keypad character return 5 4 Non Volatile Memory Command List 5 4 1 Save User Defined Character in Non Volatile Memory 254 79 cc 253 User can save his predefined characters in the non volatile memory and this will save much time in redefining it again after the power of CW12832 is switched off and on cc is the character num ber starting from 0x01 to 0x10 5 4 2 Load User Defined Character in System RAM 254 80 cc 253 During power up user can load his predefined characters from non volatile memory into the sys tem RAM by sending this command to CW12832 cc is the character number starting from 0x01 to 0x10 5 4 3 Save User Settings in Non Volatile Memory 254 83 ud 4 bytes 2 dummy bytes 253 The CW12832 reserves 32 bytes of non volatile memory for arbitrary use by the host This memo ry could be used to store a serial number IP address gateway address netmask or any other data required ud which starts from 1 0x01 to 8 0x08 is the location of a data CW12832 User Manual 27 CW L N UK CW12832 Display 5 4 4 Read User Settings from Non Volatile Memory 254 84 ud 253 User predefined settings can be retrieved by sending this command to CW12832 ud is the loca tion of the data 4 bytes will be sent from CW12832 to the host right after the command is sent 5 5 GPIO Command List The on board relay is an option
30. rrectly the image information will be shown on the right and an image preview should be shown in the box above us Cwlinux LCD ontrol platform Jb d Demo selection Load BMP Speed Scrolling banner Row 1 Row 2 c Row 3 Row 4 TESTE Load BMP file EH he LR Note Only black and white bmp are supported Load Ima Bootup Logo 0 0 0 0 GPIO EE Relay OFF Timeout 10 1 1 GPOOOFF GPO1 OFF GPO2ZOFF GPO3OFF Drawing 7 Boot up logo example CW12832 User Manual 14 CW L N U CW12832 Display 5 Click Load Image button to load the image to the CW12832 After clicking the button you should see CW 12832 displaying the image you selected in previous steps 6 Click Save button under the Boot up Logo section It would issue the command to save the image displaying on screen as the boot up logo A message box saying Boot up logo saved will come up to indicate the new boot up logo is saved Note Next to the Save button there are Show and the Default buttons Show button refresh the screen and show the current boot up image Default button will erase the user defined boot up image and restore the factory default boot up image Cwlinux LCI ntrol platform 1 22 Fweions Demonstration Demo selection Load BMP DOO DEL SET
31. s ranging from 0 0x00 to 121 0x79 and y is ranging from 0 0x00 to 31 Ox1F CW12832 User Manual 23 CW L N UX CW12832 Display 4 2 10 Draw Byte 254 62 x row byte 4 dummy bytes 253 This command allows user to draw a single byte on CW12832 at location specified by x and row x ranges from 0 to 121 and row ranges from 0 to 3 For this command 4 dummy bytes are required to send and these 4 bytes are DON T for the CW12832 CW12832 User Manual 24 CW L N UX CW12832 Display Chapter 5 Miscellaneous Commands 5 1 General Command List 5 1 1 Read Model Number 254 48 253 This command enables user to read back the model number of CW12832 2 bytes 122 0x7a and 32 0x20 which represent matrix size will be sent accordingly from CW12832 to the host after this request command is sent 5 1 2 Read Firmware Version 254 49 253 This command enables user to read back the firmware version of CW12832 For example 2 bytes 0x01 and 0x00 which represent version V1 0 will be sent accordingly from CW12832 to the host after this request command is sent 5 1 3 Soft Reset 254 86 253 This command resets the CW12832 Everything will start from startup screen again 5 1 4 Clear Display 254 88 253 This command clears the entire screen and set the text insertion point to top left ie Column 50 and Row 0 5 1 5 Set Display Contrast 254 104 contrast 253 This
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