STM32F107VC AND KEIL PROBLEM

[sami2]

Posted on May 11, 2012 at 17:36

Hello ;

I am new to STM32 ; right now I could blink a led I have good experience with other MCU venders ; but this first time to ARM. I have strange problem with my code ; when I dont use the routine  creatfile(); the program work as expect ; but when i add them to the code the program first get :   NMI_Handler    and then stuck some place ..  the code is here :  GPIO_InitTypeDef GPIO_InitStructure;

// void creatfile(void) ;

//-- void init_card (void);

void delay(unsigned int time) {

while(time--);

}

volatile unsigned int delay_main;

//-------

//------------

int main(void) {   /*!< At this stage the microcontroller clock setting is already configured,        this is done through SystemInit() function which is called from startup        file (startup_stm32f10x_xx.s) before to branch to application main.        To reconfigure the default setting of SystemInit() function, refer to        system_stm32f10x.c file      */                 //RTC_NVIC_Configuration();

/* system Tick enable timer----------------------- */

SystemCoreClock =72000000 ; if(SysTick_Config(SystemCoreClock / 1000))  // 1 ms interrupts while(1);  // error   /* GPIOD Periph clock enable */   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE);

  /* Configure PD0 and PD2 in output pushpull mode */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_4;   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;   GPIO_Init(GPIOD, &GPIO_InitStructure);   GPIO_SetBits( GPIOD, GPIO_Pin_3 | GPIO_Pin_4);

//-----------------

 init_card ();

  //creatfile();

//      while(1)  {  GPIO_SetBits( GPIOD, GPIO_Pin_3 | GPIO_Pin_4);        while (delay_main<1000);   delay_main=0;   GPIO_ResetBits( GPIOD, GPIO_Pin_3 | GPIO_Pin_4);   while (delay_main<1000);   delay_main=0;     }

 init_card ();

 }

void init_card (void) {

  U32 retv;

  while ((retv = finit (NULL)) != 0) {        /* Wait until the Card is ready*/

    if (retv == 1) {       while(1);     }     else {          }   } }

 void creatfile(void)  {

   char *fname, *next;    FILE *f;   int i,cnt = 1000;

 f = fopen (''ASSAAD.TXT'', ''w'');               /* open a file for writing           */

   if (f == NULL) {     while(1);      return;    }    for (i = 0; i < cnt; i++)  {      fprintf (f, ''This is line # %d in file %s\n'', i, ''ASSAAD.TXT'');    }    fclose (f);                         /* close the output file               */   while(1); } //--------

#ifdef  USE_FULL_ASSERT

/**

  * @brief  Reports the name of the source file and the source line number   *         where the assert_param error has occurred.   * @param  file: pointer to the source file name   * @param  line: assert_param error line source number   * @retval None   */ void assert_failed(uint8_t* file, uint32_t line) {   /* User can add his own implementation to report the file name and line number,      ex: printf(''Wrong parameters value: file %s on line %d\r\n'', file, line) */

  /* Infinite loop */

  while (1)   {   } }

#endif

/**

  * @}   */

/**

  * @}   */

/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/

Thank you  Regards          

[Tesla DeLorean]

Posted on May 11, 2012 at 18:28

Where do you think the file is going?

What libraries and hardware do you have supporting the STDIO routines, and whatever media it is writing too? Try digging out a debugger and step through the code so you better understand why it is crashing, and it explain it more thoroughly.

[sami2]

Posted on May 11, 2012 at 20:48 Thank you Clive ; I am debuging and i still  have no idea what makes this problem ; while debugging i noticed this :  Reset_Handler    PROC                  EXPORT  Reset_Handler             [WEAK]         IMPORT  SystemInit         IMPORT  __main                  LDR     R0, =SystemInit                  BLX     R0                  LDR     R0, =__main                  BX      R0                  ENDP systeminit is exuted but when i come to the line  BX R0 after main the code stucks  the assembler looks something like this                   __main: 0x08000150 F000F802  BL.W     __scatterload (0x08000158) 0x08000154 F000F84C  BL.W     __rt_entry (0x080001F0)                  __scatterload: 0x08000158 A00A      ADR      r0,{pc}+4  ; @0x08000184 0x0800015A E8900C00  LDM      r0,{r10-r11} 0x0800015E 4482      ADD      r10,r10,r0 0x08000160 4483      ADD      r11,r11,r0 0x08000162 F1AA0701  SUB      r7,r10,#0x01                  __scatterload_null: 0x08000166 45DA      CMP      r10,r11 0x08000168 D101      BNE      0x0800016E 0x0800016A F000F841  BL.W     __rt_entry (0x080001F0) 0x0800016E F2AF0E09  ADR.W    lr,{pc}-0x07  ; @0x08000167