LPC MicrocontrollersのトピックRe: freeRTOS can not run on peripheral RAM

freeRTOS can not run on peripheral RAM

lpcware — Wed, 15 Jun 2016 18:33:30 GMT

Content originally posted in LPCWare by phuockal on Mon Apr 25 00:17:44 MST 2016
Dear all,

I am using LPC4078 with freeRTOS version 7.53 copied from LPC open.

freeRTOS was running smoothly on CPU RAM. Then I want to spend CPU RAM for graphic library and move freeRTOS heap memory on onchip peripheral RAM, but I got system hard fault.

freeRTOS using heap_1.c with static memory allocation.

the following code in file heap_1.c was running fine:
static unsigned char ucHeap[ configTOTAL_HEAP_SIZE ];

but just add the __BSS(RAM2), I got hard fault:
#include "cr_section_macros.h"
...
__BSS(RAM2) static unsigned char ucHeap[ configTOTAL_HEAP_SIZE ];

I am afraid that the RAM2 (peripheral RAM) was use without initialization. I had try to find the way to initialize it. but it seem to be no need to manually initialization.

please tell me what was happening in that case, and how to use peripheral RAM for freeRTOS. Please tell me what I was wrong

Thanks in advance,

Best regards

Re: freeRTOS can not run on peripheral RAM

lpcware — Wed, 15 Jun 2016 18:33:31 GMT

Content originally posted in LPCWare by phuockal on Mon Apr 25 00:35:35 MST 2016
Dear all,

I just add more information about my problem:

on file freeRTOSConfig.h:

#define configTOTAL_HEAP_SIZE( ( size_t ) ( 22*1024 ) )

onchip peripheral RAM of LPC4078 is 32KB. Building project was successful without, no out of memory was reported.
report after build:
text data bss dec hexfilename
299396 2036 63284 364716 590acApplication.axf

in my application, no dynamic memory was declared.
system crash immediately after start.

thank you very much for your help

Re: freeRTOS can not run on peripheral RAM

lpcware — Sun, 19 Jun 2016 01:09:07 GMT

bump