基于stm32的ＨＣ—ＳＲ５０１人体感应单片机源程序如下:
- #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);
- }
所有资料51hei提供下载:
HC_SR501.7z
(1.07 MB, 下载次数: 100)
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