interfacing external RAM with STM32F103ZET6

kashif · ‎2010-07-12

Posted on July 13, 2010 at 08:32

kashif · ‎2011-05-17

Posted on May 17, 2011 at 13:58

i am still trying to understand these examples. some confusing points are:

1) what is the difference between ''Default startup'' and ''startup_stm32f10x_hd.s''?

2) what is the difference between ''Default Script File'' and ''stm32f10x_flash_extsram.ld'' ?

3) where i can find this ''Default Script File''?

please help me with your valuable experience and expertise.

regards.

stforum2 · ‎2011-05-17

Posted on May 17, 2011 at 13:58

All in main():

#define SRAM_BASE 0X68000000

short ch;

main()

{

// use the Wizards (see Wizards menu) to configure the on-chip peripherals

// later or alternatively right mouse click on a source code view to access an alternative interface to the Wizards

//{{EDS_CONFIG(PORTS)

g_pRCC->APB2ENR |= IOPDEN;

g_pGPIOD->CRH &= ~0XFFFFFFFF;

g_pGPIOD->CRH |= 0XBBBBBBBB;

g_pGPIOD->CRL &= ~0X00FF00FF;

g_pGPIOD->CRL |= 0X00BB00BB;

g_pRCC->APB2ENR |= IOPEEN;

g_pGPIOE->CRH &= ~0XFFFFFFFF;

g_pGPIOE->CRH |= 0XBBBBBBBB;

g_pGPIOE->CRL &= ~0XF00000FF;

g_pGPIOE->CRL |= 0XB00000BB;

g_pRCC->APB2ENR |= IOPFEN;

g_pGPIOF->CRH &= ~0XFFFF0000;

g_pGPIOF->CRH |= 0XBBBB0000;

g_pGPIOF->CRL &= ~0X00FFFFFF;

g_pGPIOF->CRL |= 0X00BBBBBB;

g_pRCC->APB2ENR |= IOPGEN;

g_pGPIOG->CRH &= ~0X00000F00;

g_pGPIOG->CRH |= 0X00000B00;

g_pGPIOG->CRL &= ~0X00FFFFFF;

g_pGPIOG->CRL |= 0X00BBBBBB;

//}}EDS_CONFIG

//{{EDS_CONFIG(FSMC)

g_pRCC->AHBENR |= FSMCEN;

g_pFSMC->BCR3 = WREN | MWID0;

g_pFSMC->BCR3 |= MBKEN;

//}}EDS_CONFIG

short* p = (char*)SRAM_BASE;

for (int i = 0; i < 100; i++)

{

*p = i;

ch = *p;

}

while (1)

{

}

kashif · ‎2011-05-17

Posted on May 17, 2011 at 13:58

thanks Crossware for your reply.

i have already done that using example code

C:\Program Files\Raisonance\Ride\lib\ARM\STM32Lib-v312\Project\STM32F10x_StdPeriph_Examples\FSMC\SRAM_DataMemory

using these files in the template project but no success. i an getting the value of TabAddr = 0xFFFFFFFF and MSPValue = 0xFFFFFFF8 , which is not correct.

i don't know what is wrong with the project. it might be the issue of startup file....

kashif · ‎2011-05-17

Posted on May 17, 2011 at 13:58

i have attached my project folder. it is a template project present in

C:\Program Files\Raisonance\Ride\lib\ARM\STM32Lib-v312\Project\Template\RIDE

and i have used the example code of

C:\Program Files\Raisonance\Ride\lib\ARM\STM32Lib-v312\Project\STM32F10x_StdPeriph_Examples\FSMC\SRAM_DataMemory

can anybody please verify it and tell me what i am missing in this project. whereas i have successfully used other example codes with this template project.