AnsweredAssumed Answered

simple input routine not working

Question asked by herring.trent on Nov 10, 2011
the ctrl registers remain at reset values but idr 0 an 1 goto low(0). is there something wrong with my source?



//
//
//
//STM32 BUTTON TEST
//by T. Herring tre2020067@gmail.com
//
////////////////////////////////////////////////////////////



////////////////////////////////////////////////////////////
//INCLUDE FILES
//these file should already be include in project space and do not need to be
//defined again.
//////////////////////////////////////////////////////////////
/*

#include stm32f10x_vector.c
#include stm32f10x_conf.h
#include stm32f10x_it.c
#include stm32f10x_lib.c
*/

#include "stm32f10x_lib.h"

////////////////////////////////////////////////////////////
//FUNCTION PROTOTYPES
////////////////////////////////////////////////////////////
//void clockconfig();

void gpio_flash();




void Clk_Init (void)
{

        
        //RESET CLOCK CONFIG
        RCC_DeInit();
        
        
  // 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);
   
 
  // 2-1. Set system clock dividers
#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
    // Prefetch buffer
  FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
    // Flash wait state
  FLASH_SetLatency(FLASH_Latency_2);
  // Half cycle access
  FLASH_HalfCycleAccessCmd(FLASH_HalfCycleAccess_Disable);
#endif // EMB_FLASH
 
 
 
 
 
    RCC_HCLKConfig(RCC_SYSCLK_Div1);
    RCC_PCLK2Config(RCC_HCLK_Div1);
    RCC_PCLK1Config(RCC_HCLK_Div2);
  RCC_USBCLKConfig(RCC_USBCLKSource_PLLCLK_1Div5);    
  RCC_ADCCLKConfig(RCC_PCLK2_Div8);
 
  // 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);



  // 5. Clock system from PLL
 //RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

 
 /*//WAIT FOR PLLCLK TO STABLILZE
while(RCC_GetSYSCLKSource() != 0x08)
{
}
 */
}




void main(void)
{
      GPIO_InitTypeDef GPIO_InitStructure;

      
      //SETUP DEBUG
      #ifdef DEBUG
   debug();
#endif
//CONFIGURE CLOCKS
Clk_Init();


  // GPIO Init
  // Enable GPIO clock and release reset
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE | RCC_APB2Periph_GPIOC, ENABLE);
  RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOC, DISABLE);
 //  GPIO_DeInit(GPIOC);
 
 
 
    // 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_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_5
    | GPIO_Pin_6;  
  GPIO_Init(GPIOE, &GPIO_InitStructure);
      

    
    // Enaable Swithches on PC0 and PC1
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;  
  GPIO_Init(GPIOC, &GPIO_InitStructure);
 
 
//APP MUST NEVER EXIT MAIN FUNCTION. STRANGENESS WILL OCCUR..
while(1)
{
  if(GPIOC->IDR != 0){
     GPIOE->BRR = 0x60;
  }
    GPIOE->BSRR = 0x60;
  }
}



void gpio_flash()
{

int i;
for(i=0;i<300000;i++){
 GPIOE->BSRR = 0x60;
}
for(i=0;i<30000;i++){
 GPIOE->BRR = 0x60;
}
//end gpio_flash
}


#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

Outcomes