ARDUINO to ARM NXP tools
Contents
1. for you You can just write the higher levels of your idea and zip 1t s running But I also program on PC s and like the idea of a real debugging system with single step stack unwinds and variable viewers I ve been wanting to use ARM s as they have the power to do this and have become really really cheap The problem up till now has been that they are kind of high friction systems That is unless you go for something like a Raspberry Pi or Beagle Board where you are running Linux just getting to main in a program requires rather deep study of the chip clocking and hardware Not that this is a bad thing you have to master a lot of this to do a complicated program but is a real pain to do your first Hello World or blinky program In addition getting the ARM tool chain is not simple although going to http www linaro org downloads will get you a prebuilt tool chain which save hours of work Even with it you do still need the startup code to get you to main I found the tool chain link in http www meatandnetworking com tutorials arm cortex mx quickstart which is a good article if you are interested in bare metal programming NPX has introduced the LPC1114 ARM MO in a 28 Pin DIP package for around 3 This chip has 8K of RAM 40K of Flash and runs at 48 MHz It is in the running for an Arduino like niche The 28 pin DIP means you the average hobbyist can build this on a standard breadboard Over and above that 1t comes with softw2. FANDORA PRODUCTS ARDUINO to ARM NXP tools Jim Schimpf Document Number PAN 201406001 Revision Number 0 3 20 June 2014 Pandora Products 215 Uschak Road Derry PA 15627 Pandora Products Program Manual NXP tools Creative Commons Attribution 4 0 International License 2014 Pandora Products All other product names mentioned herein are trademarks or registered trademarks of their respective owners Pandora Products 215 Uschak Road Derry PA 15627 Phone 724 539 1276 Email jim schimpf gmail com Pandora Products has carefully checked the information in this document and believes it to be accu rate However Pandora Products assumes no responsibility for any inaccuracies that this document may contain In no event will Pandora Products be liable for direct indirect special exemplary incidental or consequential damages resulting from any defect or omission in this document even if advised of the possibility of such damages In the interest of product development Pandora Products reserves the right to make improvements to the information in this document and the products that it describes at any time without notice or obligation PAN 201406001 20 June 2014 ji Revision 0 3 NXP tools Pandora Products Program Manual NXP tools Document Revision History 20 Jun 2014 Editing and add contributors 21 Jun 2014 21 Jun 2014 PAN 201406001 20 June 2014 lil Revision 0 3 NXP tools Pandora Products Prog
3. are packages that bring 1t almost to the Arduino level of simplicity and abstracts the hardware enough that you won t be bogged down in that just to start PAN 201406001 20 June 2014 Page 1 of 7 Revision 0 3 NXP tools Pandora Products Program Manual NXP tools Materials There are debugging pods available for 20 that give you JTAG type debugging where you can breakpoint single step and view stacks or variables of your running code This is the part I like running code with crossed fingers hoping it works always scares me a lot And lastly freeRTOS comes with the development code it gives you a real time kernel where you have threads mutex s and semaphore s You can do true multitasking like you can in Linux The rest of this paper will detail how to set this up with the NXP tools so you can develop code and use the really neat little machine 2 Materials 2 1 Hardware LPC1114FN28 102 This is the part it is available from DigiKey Mouser and Newark OM13054UL Link 2 Debugging Pod available from DigiKey Mouser and Newark Breadboard Solder less Breadboard available from the same or Radio Shack 3 3VDC Power Supply adjustable supply or see below for a design LED Any color used in sample programs 33002 Resistor Current limiter for LED 15KQ Resistor 2 pull ups for nRESET and POO_1 2 2 Software LPCXpresso Available from NXP http www lpcware com lpcxpresso download Windows Mac Linux Ipcopen_v2_00a_lpcxpresso_nxp_lpcx
4. oard and chip support code You can read the LPCXpresso_Getting_Started_User_Guide 2 for installation and registration instructions Also notes on the various windows that will be discussed below 5 First Program 5 1 Initial build Look at the projects in the left side Project window of LPCXpresso and pick nxp_Ipcxpresso_11c24_periph_blinky PAN 201406001 20 June 2014 Page 4 of 7 Revision 0 3 NXP tools Pandora Products NXP tools s ProjectE H Peripher ih Registers as b lpc_chip_llexx_lib p pa nxp_lpexpresso_11c24 board_lib b nxp_Ipexpresso_11c24_freertos_blinky b e xp lpexpresso_11c24 periph_ade Program Manual Modifications E nxp_lpexpresso_11c24_periph_blinky a ca Binaries ho E Includes EE example inc Y src P c blinky c P e cr_startup_lpcllxx c P e sysinit c Debug EPR e LA ee eee ee ee el Figure 4 Pick project Now in the window below pick build the project and it should build without error U Qui E Var Bre Out ex 0O F x Import project s l New project Build all projects Debug a Build nxp_lpcxpresso_11c24 periph_blinky Debug e Clean nxp_Ipexpresso_11c24_periph_blinky Debu e Debug nxp_lpcxpresso_11c24 periph_blinky Deb HA Edit nxp_lpexpresso_11c24_periph_blinky project EH Import project s from XML Description 2 Quick Settings J Export projects to archive zip JG Export projects and references to archive zi
5. ols software Note the debugging lines SWDIO and SWCLK these are the connections to the Link 2 Pod There is a small 10 pin ribbon cable supplied with the pod and we make connections to it Shown here is the end of the cable looking into the 10 pin connector with the notes on the three wires you need I have found that cut off small capacitor leads are small enough to stick into the connector then stick into the breadboard Leads a few inches long are fine Also the LED is hooked to pin 28 this will be used in our test program LINK 2 J7 CABLE END RED STRIPE on cable To Pin 12 SWDIO TMS Vref To Pin3 SWDCLK TCK SWDEXTa TRACECTL TDO NOEXTb TDI GND Board GND GND KEY nRESET GNDDetect Figure 3 Link 2 Connector 4 Software Install the LPCXpresso software on your machine Also create an account at NXP and register the software The Free version has a code limitation of 256K which is quite enough for our use here The Ipcopen_v2_00a_lpcxpresso_nxp_lpcxpresso_11c24 zip file can be left anywhere as we will browse to 1t when needed Next start LPCXpresso and decide where to put your workspace 1t can be anywhere you as a user can read and write files don t worry you can always create another workspace if needed When you create the workspace it will ask you to find Ipcopen_v2_00a_Ipcxpresso_nxp_Ipcxpresso_11c24 point there and it will expand this in your workspace This gives you a bunch of example projects plus the b
6. or as it s not used The second is to change the original SYSCTL_PLLCLKSRC_MAINOSC to SYSCTL_PLLCLKSRC_IRC This sets up the system to use the RC oscillator as we have built on our breadboard Note All the projects in this workspace will now use this board_sysinit and assume using the RC oscillator This is what I meant about having different workspaces you could have another where your chips did use a crystal and would not modify this code After this is done go back to the blinky project CLEAN the project the build again this gets the board_sysinit c changes Now you are ready to run PAN 201406001 20 June 2014 Page 6 of 7 Revision 0 3 NXP tools Pandora Products Program Manual NXP tools First Run 6 First Run After all this you can now press the Debug button either the bug at the top of the screen or the debug button shown in Figure 6 on the preceding page If all goes correctly and you have your Link 2 connected and plugged into USB it should then run the code and stop just after main in blinky c You can single step at this point and if you hit Go green arrow it should run and the LED should blink 7 Next All the demo projects should now build and run on the chip In particular look at the freeRTOS project as that shows you how to use this RTOS and is the gateway to multitasking projects You will also see in the various projects how they have routines to handle chores like setting up ring buffers for serial I O calls to set
7. p Figure 5 First Build If all that worked without error we are almost ready we have to modify the board support slightly to get 1t working with our single chip 5 2 Modifications Move up in the project list and open the nxp_lpcxpresso_11c24_board_lib project and open the board_sysinit c file PAN 201406001 20 June 2014 Revision 0 3 NXP tools Page 5 of 7 Pandora Products Program Manual NXP tools Modifications y Project E 22 Peripher bhf Registers O 7 3 gt 5 Ipc_chip_11cxx_lib i nxp_lpcxpresso_11 24_board_lib a ER Archives P Hih Includes ince Y LA sre P Le board c Debug b EE nxp_Ipcexpresso_11c24_freertos_blinky b E nxp lpexpresso 11c24 periph_ade E nxp_lpexpresso_11c24 periph_blinky p ye Binaries gt pi Includes ee oe aana a fe Figure 6 board_sysinit c We now have to edit this file to tell it our chip is using the RC oscillator and not a crystal to run Setup system clocking x STATIC void SystemSetupClocking void volatile int i Powerup main oscillator x Don t start MAIN Chip_SYSCTL_PowerUp SYSCTL POWERDOWN_SYSOSC_PD x Wait 200us for OSC to be stablized no status indication dummy walt x for i 0 i lt 0x100 i 1 Set system PLL input to main oscillator x USE RC OSC Chip _Clock_SetSystemPLLSource SYSCTL_PLLCLKSRC_IRC Two lines are changed the first is to comment out the power up of the main oscillat
8. presso_11c24 Available from NXP http www lpcware com content nxpfile lpcopen software development platform lpcllxx packages www lpcware com content nxpfile lpcopen software development platform 1pc 2 3 Power Supply If you only have a 5V supply then you can create a 3 3V supply on the breadboard with it plus a 3 terminal regulator Your system when running will draw less than 20 ma only a small supply will be needed PAN 201406001 20 June 2014 Page 2 of 7 Revision 0 3 NXP tools Pandora Products Program Manual NXP tools Link 2 Setup dad 3 3V out LD1117S33TR T 0 01 uF Figure 1 3 3 V supply from other voltage 2 4 Link 2 Setup After you receive the Link 2 pod move the enclosed jumper to J 2 J 1 does not need a jumper If you don t do this the pod will not connect to the processor 3 Building the board The basic circuit for the processor will be quite simple as we will only be blinking an LED for this demo Also we will not need a crystal as the internal RC oscillator is quite good enough 3 3 VDC PIO1_8 PIO1_4 PIO1_9 PIO1_2 PIOO_8 PIO1_1 PIOO_9 PIO1_0 3 3 VDC PIOO_2 PIOO_11 3 3 VDC PIOO_3 PIOO_6 3300 e LPC1114FN28 102 15 KQ resistors Y PIOO_1 nRESET SWDIO To Pin 2 Link 2 Cable SWCLK To Pin 4 Link 2 Cable XTALOUT E To Pin 3 Link 2 Cable XTALIN 7 Figure 2 LPC1114 circuit PAN 201406001 20 June 2014 Page 3 of 7 Revision 0 3 NXP tools Pandora Products Program Manual NXP to
9. ram Manual NXP tools Contents Contents 1 Introduction 1 2 Materials 2 ell HANO oss so tenses Sen Sect deh Ave cey alk aS A Nb Rp Be aeons es PE RS Se 2 De DONA a e aTi ers e aE eak a a es ee aa ea ee ee ar Se a a 2 Zo FOW TSUP iaee e e E dl A Al nce aa bo ec hee E A 2 2A Link oeUe ra Soe eee ee ee a Se a A a a a a a E 3 3 Building the board 3 4 Software 4 5 First Program 4 Sal Mal DM era dira a s 6 A o pe ea So ese its i 4 Me NIOUICALONS res ei es A ds E A e di 5 6 First Run 7 7 Next 7 PAN 201406001 20 June 2014 IV Revision 0 3 NXP tools Pandora Products Program Manual NXP tools List of Figures List of Figures 1 3 3 V supply from other voltage aooaa 0 000 ee eee 3 2 LPCUIIACICNL 244 sans aa aaa 3 3 Link 2 COOMCCION ss mes es a sa ss 4 4 UICISDEOISO lt soso asadas sesos 5 5 PUSS BU roses oa adas ss ds 5 6 board Sys secos oa rra 6 Thanks I want to thank the denizens of the NPX LPC11xx forum for their patient and useful answers to my rather naive questions I would have never gotten this far without them LabRat lxpresso support and serge thanks 1 Introduction Pve used the Arduino 1 for a long time and being a lazy person l really like the system All you need is the board and the Arduino IDE to be up and going It s very low friction to get into and use You don t have to make a deep study of the ATMEL part or how to set up a serial port baud rate the Arduino code has that done
10. up hardware like I2C SPI and GPIO While not quite as simple as Arduino the examples make it quite clear how to use them and you don t have to get involved in Pin muxing and data direction register setting You can check in the processor user manual for further details 3 References 1 Arduino Arduino home page 2 NXP Getting started with NXP LPCXpresso NXP B V 17 april 2013 edition 2013 3 NXP UM10398 LPC111x LPC11Cxx User manual NXP BV rev 12 3 edition June 2014 PAN 201406001 20 June 2014 Page 7 of 7 Revision 0 3 NXP tools
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