STM32入门点亮LED的程序

最新推荐文章于 2025-02-25 15:32:20 发布

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最新推荐文章于 2025-02-25 15:32:20 发布

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本文链接：https://blog.youkuaiyun.com/qq_42339969/article/details/88817489

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关于STM32流水灯的实现

最近在学习STM32，写了几个点亮和流水灯的简单程序有时间再更新

#include “stm32f10x.h”
void RCC_Configuration(void);//2
void GPIO_Configuration(void);//GPIO
void Delay(u32 count)
{
u32 i=0;
for(;i<count;i++);
}
int main(void)
{ RCC_Configuration(); //3
LED_Init();

while(1)

{

  GPIO_SetBits(GPIOB,GPIO_Pin_5); //PB.5 输出高	
  Delay(300000);
  GPIO_ResetBits(GPIOB,GPIO_Pin_5);
  Delay(300000);

}
}
void LED_Init(void) //GPIO
{

GPIO_InitTypeDef   GPIO_InitStructure;         //(1)结构体
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;     //LED0-->PB.5 推挽输出

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //速度
GPIO_Init(GPIOB, &GPIO_InitStructure);

}
void RCC_Configuration(void) //1
{
ErrorStatus HSEStartUpStatus;
RCC_DeInit();
RCC_HSEConfig(RCC_HSE_ON);
HSEStartUpStatus = RCC_WaitForHSEStartUp();

if(HSEStartUpStatus == SUCCESS)
{
	
	RCC_HCLKConfig(RCC_SYSCLK_Div1); 
 	RCC_PCLK2Config(RCC_HCLK_Div1); 
 	RCC_PCLK1Config(RCC_HCLK_Div2);

	FLASH_SetLatency(FLASH_Latency_2);
	FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

	RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);

	RCC_PLLCmd(ENABLE);

	while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);

	RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
	
	while(RCC_GetSYSCLKSource() != 0x08);
}
  	

	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

}