HELP! SIMPLE APP WONT WORK

[tre2020067]

Posted on September 16, 2011 at 07:57

just tryin to send PE.06 high but its not workin. is it my sourcecode? IT DOES compile without error or warnings.

#include ''stm32f10x_lib.h''

void Clk_Init (void)

{   // 1. Clocking the controller from internal HSI RC (8 MHz)   RCC_HSICmd(ENABLE);   // wait until the HSI is ready   while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);   RCC_SYSCLKConfig(RCC_SYSCLKSource_HSI);   // 2. Enable ext. high frequency OSC   RCC_HSEConfig(RCC_HSE_ON);   // wait until the HSE is ready   while(RCC_GetFlagStatus(RCC_FLAG_HSERDY) == RESET);   // 3. Init PLL   RCC_PLLConfig(RCC_PLLSource_HSE_Div1,RCC_PLLMul_9); // 72MHz   RCC_PLLCmd(ENABLE);   // wait until the PLL is ready   while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);   // 4. Set system clock dividers   RCC_USBCLKConfig(RCC_USBCLKSource_PLLCLK_1Div5);   RCC_ADCCLKConfig(RCC_PCLK2_Div8);   RCC_PCLK2Config(RCC_HCLK_Div1);   RCC_PCLK1Config(RCC_HCLK_Div2);   RCC_HCLKConfig(RCC_SYSCLK_Div1); #ifdef EMB_FLASH   // 5. Init Embedded Flash   // Zero wait state, if 0 < HCLK 24 MHz   // One wait state, if 24 MHz < HCLK 56 MHz   // Two wait states, if 56 MHz < HCLK 72 MHz   // Flash wait state   FLASH_SetLatency(FLASH_Latency_2);   // Half cycle access   FLASH_HalfCycleAccessCmd(FLASH_HalfCycleAccess_Disable);   // Prefetch buffer   FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); #endif // EMB_FLASH   // 5. Clock system from PLL   RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); }

////////////////////////////////

// // // //Start MAIN function // // // //////////////////////////////

void main(void)

{   GPIO_InitTypeDef GPIO_InitStructure;     #ifdef DEBUG    debug(); #endif            // Init clock system   Clk_Init();        // GPIO Init   // Enable GPIO clock and release reset   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE, ENABLE);   RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOE, DISABLE);              // Assign PE6 to LED   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; 

  GPIO_Init(GPIOE, &GPIO_InitStructure);      GPIO_WriteBit(GPIOE,GPIO_Pin_6,Bit_SET);      while(1)    {    }    }

#ifdef  DEBUG

/******************************************************************************* * Function Name  : assert_failed * Description    : Reports the name of the source file and the source line number *                  where the assert_param error has occurred. * Input          : - file: pointer to the source file name *                  - line: assert_param error line source number * Output         : None * Return         : None *******************************************************************************/ void assert_failed(u8* file, u32 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

[raptorhal2]

Posted on September 17, 2011 at 14:28

At the end of the clock init, add:

// Wait until PLL is used as system clock source while(RCC_GetSYSCLKSource() != 0x08 ) {} Cheers, Hal

[tre2020067]

Posted on September 17, 2011 at 15:20

still nothing. but i think its the clock init function.

when clock init starts theres a push operation which goes to register 7. but at the end of the clock init function there is a pop which moves contents from register 0 to the PC which is 0xFFFFFFFE.  why would it be doing this?

[tre2020067]

Posted on September 18, 2011 at 21:55

I finanly got it working. Thanks for the help guys!

turns out it was the last function call of clock_init() // 5. Clock system from PLL RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); After the function call it pops 0xFFFFFFFE on to the stack. the question is why?

[raptorhal2]

Posted on September 19, 2011 at 05:20

So how did you finally get it working ? Inquiring minds want to know.

Cheers, Hal

[Tesla DeLorean]

Posted on September 19, 2011 at 08:51

Chances are by not initializing the clocks, and using the standard reset conditions, or whatever startup was setting them too.

I'd probably ensure after both RCC_SYSCLKConfig() that it would spin waiting for the correct clock source to actually engage.