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

SAM7 IAR demo fails at restart

Posted by Nobody/Anonymous on August 23, 2005
I have the sam7s-ek evaluation board, and I run the freeRTOS demo for this. I can build it and load it into flash and run: runs OK. I can stop it using the debugger, and run again: OK. But, if I reset it with the debugger it will crash on restart, shortly after line "AT91C_BASE_AIC->AIC_EOICR = 0;"

Any explanations and solutions?

Thanks in advance

RE: SAM7 IAR demo fails at restart

Posted by Nobody/Anonymous on August 23, 2005
Try removing the line. It might not be needed with later IAR releases.

Also check what your JTAG startup script is doing. Does it disable interrupts before the code starts. It could be that the timer interrupt is still running when you reset the code.

RE: SAM7 IAR demo fails at restart

Posted by Jokke on August 23, 2005
I tried to remove the line, and nothing worked. I have also made the guess that some interrupt is pending. I will have a special look at timer.

RE: SAM7 IAR demo fails at restart

Posted by Jokke on September 20, 2005
Now I tried to add things to IAR:s startup code:
Adding
*AT91C_AIC_IDCR = 0xffffffff;// disable all irq
*AT91C_AIC_ICCR = 0xffffffff; // clear all pending irq:s
last in the function "AT91F_LowLevelInit", in CStartup_SAM7.c.
This disables all interrupts, and resets any pending ones. And it helps!

Regards
Jokke

RE: SAM7 IAR demo fails at restart FIXED!

Posted by Richard on September 20, 2005
It appears that the macro file used with the J-Link has a function missing. Add the following lines to the file SAM7.mac (if using the SAM7X demo, or equiv for the S demo - just search for a .mac file in the FreeRTOS directory to find the right one).

-- start of code to add
// Reset the AIC upon a software reset.
execUserReset()
{
AIC();
Watchdog();
}
-- end of code to add

This will then do what is required automatically when you click the reset button on the IDE.


[ 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