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Trying to run an ISR routine inside the CCM SRAM of STM32F303 using EWARM

Question asked by mendes.ari.001 on Nov 14, 2012
linker icf file:

/*-Sizes-*/
define symbol __ICFEDIT_size_cstack__ = 0x400;
define symbol __ICFEDIT_size_heap__   = 0x200;
/**** End of ICF editor section. ###ICF###*/




define memory mem with size = 4G;
define region ROM_region   = mem:[from __ICFEDIT_region_ROM_start__   to __ICFEDIT_region_ROM_end__];
define region RAM_region   = mem:[from __ICFEDIT_region_RAM_start__   to __ICFEDIT_region_RAM_end__];
define region CCMRAM_region   = mem:[from __ICFEDIT_region_CCMRAM_start__   to __ICFEDIT_region_CCMRAM_end__];


define block CSTACK    with alignment = 8, size = __ICFEDIT_size_cstack__   { };
define block HEAP      with alignment = 8, size = __ICFEDIT_size_heap__     { };


initialize by copy { section MYCODE }; 
initialize by copy { readwrite };
do not initialize  { section .noinit };


place at address mem:__ICFEDIT_intvec_start__ { readonly section .intvec };


place in ROM_region   { readonly }; 
place in RAM_region   { readwrite, block CSTACK, block HEAP };
place in CCMRAM_region { section MYCODE };    

********************** ISR Function *******************************
#pragma location="MYCODE"
  void DMA1_Channel1_IRQHandler(void)
{
  u16 i;
  GPIOC->BSRR = GPIO_Pin_7;


  
  DMA_ClearITPendingBit(DMA1_IT_TC1);


  Vtemp1 = ((u32) ADC1buf[1] * 0x66A8) >> 13;
  
  for(i=0;i<20;i++){}
  
  GPIOC->BSRR = GPIO_Pin_7<<16;
  
}


When I try to load the code using the jlink, show the error message "Wrinting outside flash memory at address 0x10000000" .


If I change the name of the function, It is possible to load the code and when the function is called, I can confirm that the function is running inside the CCM SRAM.


Has anyone  already tried to run a ISR routine in the CCM SRAM using the EWARM?









                     

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