stm32学习LED控制

1万 · 2012-5-6 16:13

本帖最后由 gaochy1126 于 2012-5-6 19:35 编辑

#include "stm32f10x.h"
#include "stm32_eval.h"
#include "stm32f10x_conf.h"
GPIO_InitTypeDef GPIO_InitStructure;//GPIO结构体
void RCC_Configuration(void)//RCC初始化
{
  ErrorStatus HSEStartUpStatus;
  /* RCC system reset(for debug purpose) */
  RCC_DeInit();
  /* Enable HSE */
  RCC_HSEConfig(RCC_HSE_ON);
  /* Wait till HSE is ready */
  HSEStartUpStatus = RCC_WaitForHSEStartUp();
  if(HSEStartUpStatus == SUCCESS)
  {
/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
/* Flash 2 wait state */
FLASH_SetLatency(FLASH_Latency_2);

/* HCLK = SYSCLK */
RCC_HCLKConfig(RCC_SYSCLK_Div1);

/* PCLK2 = HCLK */
RCC_PCLK2Config(RCC_HCLK_Div1);
/* PCLK1 = HCLK/2 */
RCC_PCLK1Config(RCC_HCLK_Div2);
/* PLLCLK = 8MHz * 9 = 72 MHz */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
/* Enable PLL */
RCC_PLLCmd(ENABLE);
/* Wait till PLL is ready */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}
/* Select PLL as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
/* Wait till PLL is used as system clock source */
while(RCC_GetSYSCLKSource() != 0x08)
{
}
  }
}
void NVIC_Configuration(void)
{
#ifdef  VECT_TAB_RAM
  /* Set the Vector Table base location at 0x20000000 */
  NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#else  /* VECT_TAB_FLASH  */
  /* Set the Vector Table base location at 0x08000000 */
  NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif
}
void my_GPIO_Init(void)初始化GPIO
{
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC , ENABLE);
  GPIO_InitStructure.GPIO_Pin= GPIO_Pin_3 | GPIO_Pin_4 |GPIO_Pin_5 ;
  GPIO_InitStructure.GPIO_Speed =GPIO_Speed_10MHz;
  GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;

  //GPIO_Init(GPIOC,&GPIO_InitStructure);
  GPIO_Init(GPIOC, &GPIO_InitStructure);




}
void delay()
{
  unsigned int x,y;
  for(x=0;x<1000;x++)
for(y=0;y<1000;y++);
}
void main(void)
{
  char i;
  RCC_Configuration();
  NVIC_Configuration();
  my_GPIO_Init();
  GPIO_SetBits(GPIOC,GPIO_Pin_3 | GPIO_Pin_4 |GPIO_Pin_5);
  delay();
  GPIO_ResetBits(GPIOC,GPIO_Pin_3 | GPIO_Pin_4 |GPIO_Pin_5);
  delay();
  while(1)
  {
   for(i=0;i<3;i++)
   {
      GPIO_ResetBits(GPIOC,GPIO_Pin_3 | GPIO_Pin_4 |GPIO_Pin_5);LED灯全灭
      GPIO_WriteBit(GPIOC,0x01<<(i+3),Bit_SET);
点亮一个led左移一个
      delay();
   }
  }

}