万利开发板STM3210B-LK1原理图之LED勘误

 20120714.rar   

LED与GPIO的对应关系应为：PC7----LED1

                         PC6----LED2

                         PC5----LED3

                         PC4----LED4

验证代码：

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/* Includes------------------------------*/
#include "stm32f10x.h"

/* Private function prototypes-------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);

typedef enum {
  LED1 = 0,
  LED2,
  LED3,
  LED4,
}LED_STATE;

LED_STATE led_status;

int main(void)
{
  u32 cnt = 0x000fffff;
  /* System Clocks Configuration */
  RCC_Configuration();
  /* Configure the GPIOC ports */
  GPIO_Configuration();
  led_status = LED1;
  while (1){
    switch (led_status){
    case LED1:
      GPIOC->BSRR = 0x00800080;     /* turn on LED1 */
      led_status = LED2;
      break;
    case LED2:
      GPIOC->BSRR = 0x00400040;     /* turn on LED2 */
      led_status = LED3;
      break;
    case LED3:
      GPIOC->BSRR = 0x00200020;     /* turn on LED3 */
      led_status = LED4;
      break;
    case LED4:
      GPIOC->BSRR = 0x00100010;      /* turn on LED4 */
      led_status = LED1;
      break;
    }
    while(cnt--);
    cnt = 0x000fffff;
  }
}
/**
  * @brief  Configures the different system clocks.
  * @param  None
  * @retval : None
  */
void RCC_Configuration(void)
{
  /* Setup the microcontroller system. Initialize the Embedded Flash
  Interface, initialize the PLL and update the SystemFrequency variable. */
  SystemInit();
  /* GPIOC clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
}
/**
  * @brief  Configure the GPIOC Pins.
  * @param  None
  * @retval : None
  */
void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  /* GPIOC configuration: PC4 PC5 PC6 PC7 as led controller */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|
  GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
}

注意：在调试代码时候注意第72行GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;，原来我用的是开漏输出模式GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;灯一直不亮，换成现在的推挽输出就正常了。