simple input routine not working

tre2020067 · ‎2011-11-09

Posted on November 10, 2011 at 07:27

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