基于stm32的HC_SR501人体感应程序 -

#include <stdio.h>
#include <stm32f10x_lib.h>
#include <stm32f10x_gpio.h>
#include <stm32f10x_rcc.h>
#include <delay_by_systick.h>
#include <GPIOweibangding.h>
#include <hc_sr501.h>
#include <USART1_Configuration.h>
void RCC_Configuration(void);
void GPIO_Configuration(void);
int fputc(int ch,FILE *p)
{
USART_SendData(USART1,(u8)ch);
while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET);
return ch;
}
int main(void)
{
delay_init(72);
RCC_Configuration();
GPIO_Configuration();
HC_SR();
USART1_Configuration();
while(1)
{
GPIO_ResetBits(GPIOC,GPIO_Pin_0);
if(HC_SR501_Statue()==1)
{
printf("有人\r\n");
}
else printf("没人\r\n");
delay_ms(500);
}
}
void RCC_Configuration(void)
{
//----------使用外部RC晶振-----------
RCC_DeInit(); //初始化为缺省值
RCC_HSEConfig(RCC_HSE_ON); //使能外部的高速时钟
while(RCC_GetFlagStatus(RCC_FLAG_HSERDY) == RESET); //等待外部的高速时钟
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); //Enable Prefetch Buffer
FLASH_SetLatency(FLASH_Latency_2); //Flash 2 wait state
RCC_HCLKConfig(RCC_SYSCLK_Div1); //HCLK = SYSCLK
RCC_PCLK2Config(RCC_HCLK_Div1); //PCLK2 = HCLK
RCC_PCLK1Config(RCC_HCLK_Div2); //PCLK1 = HCLK/2
RCC_PLLConfig(RCC_PLLSource_HSE_Div1,RCC_PLLMul_9); //PLLCLK = 8MHZ * 9 =72MHZ
RCC_PLLCmd(ENABLE); //Enable PLLCLK
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET); //Wait till PLLCLK is ready
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); //Select PLL as system clock
while(RCC_GetSYSCLKSource()!=0x08); //Wait till PLL is used as system clock source
//--------打开相应的外设时钟--------------------
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO,ENABLE); //使能APB2外设的GPIOC的时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE);
}
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_SetBits(GPIOC,GPIO_Pin_0);
}

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