Quality RTOS & Embedded Software

 Real time embedded FreeRTOS RSS feed 
Real time embedded FreeRTOS mailing list 
Quick Start Supported MCUs PDF Books Trace Tools Ecosystem TCP & FAT Training




Loading

FreeRTOS+EK-LM3S6965 display problem

Posted by JustGreg on July 3, 2012
Hi!

I'd like to evaluate the freeRTOS demo on my Stellaris evaluation kit (EK-LM3S6965). As far as I know it is supported by a demo available in the freeRTOS package. I was able to compile and download the application in both IDEs (IAR & KEIL). Running the application there is nothing on the display, however. I checked the code and found that in the main.c the display is assumed to be an OSRAM type and not the RIT one. I modified the switch conditional part and managed the display to show something which resembles to the demo but it is obviously buggy. Is there any better or updated version of the demo available? Or any tip how to modify the demo? Thank you!

RE: FreeRTOS+EK-LM3S6965 display problem

Posted by Richard on July 3, 2012
That demo is very, very old, and was written on the original EK hardware. Since then the display used on the hardware has been changed (more than once I believe) so you have to take the display driver from StellarisWare that is correct for your revision of the hardware. I only have OSRAM hardware here, so cannot test anything else, but I know lots of people have been able to change display drivers successfully.

Searching for OSRAM here: http://www.freertos.org/FreeRTOS_Support_Forum_Archive/freertos_support_forum_archive_index.html might help.

Regards.

RE: FreeRTOS+EK-LM3S6965 display problem

Posted by JustGreg on July 3, 2012
Hi Richard,

thank you for your quick reply. I replaced the driver file from my Stellarisware, have sorted the header file issues and it works (at least it seems to) with IAR Kickstart. With Keil the linker still complains. More work is needed.

RE: FreeRTOS+EK-LM3S6965 display problem

Posted by JustGreg on July 3, 2012
All right, I have the Keil version up and running. I had to replace freeRTOS's driverlib.lib with the updated one in Stellarisware/driverlib/rvmdk.

Basically, the following is needed:

1. Find the part below in main.c, and modify it like this:

/* Map the OLED access functions to the driver functions that are appropriate
for the evaluation kit being used. */
switch( HWREG( SYSCTL_DID1 ) & SYSCTL_DID1_PRTNO_MASK )
{
//case SYSCTL_DID1_PRTNO_6965:
case SYSCTL_DID1_PRTNO_2965:vOLEDInit = OSRAM128x64x4Init;
vOLEDStringDraw = OSRAM128x64x4StringDraw;
vOLEDImageDraw = OSRAM128x64x4ImageDraw;
vOLEDClear = OSRAM128x64x4Clear;
ulMaxY = mainMAX_ROWS_64;
pucImage = pucBasicBitmap;
break;
case SYSCTL_DID1_PRTNO_6965:
case SYSCTL_DID1_PRTNO_1968:
case SYSCTL_DID1_PRTNO_8962 :vOLEDInit = RIT128x96x4Init;
vOLEDStringDraw = RIT128x96x4StringDraw;
vOLEDImageDraw = RIT128x96x4ImageDraw;
vOLEDClear = RIT128x96x4Clear;
ulMaxY = mainMAX_ROWS_96;
pucImage = pucBasicBitmap;
break;


2. Update rit128x96x4.c and rit128x96x4.h by copying them from Stellarisware
3. In rit128x96x4.c find the includes and remove 'inc', 'driverlib' etc.
4. Update ssi.h from Stellarisware
5. Update driverlib.a (IAR) or driverlib.lib (Keil) from Stellarisware


[ Back to the top ]    [ About FreeRTOS ]    [ Sitemap ]    [ ]




Copyright (C) 2004-2010 Richard Barry. Copyright (C) 2010-2016 Real Time Engineers Ltd.
Any and all data, files, source code, html content and documentation included in the FreeRTOSTM distribution or available on this site are the exclusive property of Real Time Engineers Ltd.. See the files license.txt (included in the distribution) and this copyright notice for more information. FreeRTOSTM and FreeRTOS.orgTM are trade marks of Real Time Engineers Ltd.

Latest News:

FreeRTOS V9.0.0 is now available for download.


Free TCP/IP and file system demos for the RTOS


Sponsored Links

⇓ Now With No Code Size Limit! ⇓
⇑ Free Download Without Registering ⇑


FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

Renesas Electronics Gold Alliance RTOS Partner.jpg

Microchip Premier RTOS Partner

RTOS partner of NXP for all NXP ARM microcontrollers

Atmel RTOS partner supporting ARM Cortex-M3 and AVR32 microcontrollers

STMicro RTOS partner supporting ARM7, ARM Cortex-M3, ARM Cortex-M4 and ARM Cortex-M0

Xilinx Microblaze and Zynq partner

Silicon Labs low power RTOS partner

Altera RTOS partner for Nios II and Cortex-A9 SoC

Freescale Alliance RTOS Member supporting ARM and ColdFire microcontrollers

Infineon ARM Cortex-M microcontrollers

Texas Instruments MCU Developer Network RTOS partner for ARM and MSP430 microcontrollers

Cypress RTOS partner supporting ARM Cortex-M3

Fujitsu RTOS partner supporting ARM Cortex-M3 and FM3

Microsemi (previously Actel) RTOS partner supporting ARM Cortex-M3

Atollic Partner

IAR Partner

Keil ARM Partner

Embedded Artists