US-100超声波（测距与测温）基于stm32f103源码------方式串口通信（测距与测温）

2019-04-15 17:08发布

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///======================US100.c================================= #include "US100.h" #include "systick.h" #include "usart.h" extern char RxCounter2,RxBuffer2[100]; char buff[100] = {0}; int tem = 0; int distance = 0; int index = 0; void clear_buff2()//串口2缓存清理函数 { int i; for(i=0;i<100;i++) RxBuffer2[i]=0; RxCounter2=0; index=0; } void readTembuff()//读取温度与距离 ：周期36+55+5=96ms；频率约等于10hz { UART2_send_byte(0x55);//发送测距命令 delay_ms(36); delay_ms(55); UART2_send_byte(0x50);//发送测温命令 delay_ms(5); distance = RxBuffer2[0]*256+RxBuffer2[1]; tem = RxBuffer2[2]-45; clear_buff2(); } ////==============================USART.c===================================== #include "usart.h" #include "stdio.h" #include "string.h" #include "timer.h" void UART2_send_byte(char data) { while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET); USART_SendData(USART2, data); } char RxCounter2,RxBuffer2[100]; extern u8 Timeout2; void uart2_init() { GPIO_InitTypeDef GPIO_InitStructure; //?????????,?????GPIO USART_InitTypeDef USART_InitStructure; //??????? NVIC_InitTypeDef NVIC_InitStructure;//??????? RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE); //???? /* ??GPIO????IO? usart2*/ GPIO_InitStructure.GPIO_Pin=GPIO_Pin_2;//TX //????PA2 GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP; //?????? GPIO_Init(GPIOA,&GPIO_InitStructure); /* ???????IO */ GPIO_InitStructure.GPIO_Pin=GPIO_Pin_3;//RX //????PA3 GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING; //???? GPIO_Init(GPIOA,&GPIO_InitStructure); /* ???GPIO */ USART_InitStructure.USART_BaudRate=9600; //??????9600 //??? USART_InitStructure.USART_WordLength=USART_WordLength_8b; //???8? USART_InitStructure.USART_StopBits=USART_StopBits_1; //1???? USART_InitStructure.USART_Parity=USART_Parity_No; //??? USART_InitStructure.USART_HardwareFlowControl=USART_HardwareFlowControl_None; //????? USART_InitStructure.USART_Mode=USART_Mode_Rx|USART_Mode_Tx; //????????? USART_Init(USART2,&USART_InitStructure); /* ???USART2 */ USART_Cmd(USART2, ENABLE); /* ??USART2 */ USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);//?????????USART?? ???? USART_ClearFlag(USART2,USART_FLAG_TC);//??USARTx??????? NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn; //??USART2????? NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //??????0 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //??????0 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //?? NVIC_Init(&NVIC_InitStructure); } void Uart2_SendStr(char*SendBuf) { while(*SendBuf) { while((USART2->SR&0X40)==0) { }//µÈ´ý·¢ËÍÍê³É USART2->DR = (u8) *SendBuf; SendBuf++; } } void USART2_IRQHandler(void) { if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET) //½ÓÊÕÖжϣ¬¿ÉÒÔÀ©Õ¹À´¿ØÖÆ { TIM_Cmd(TIM4, ENABLE); Timeout2=0; RxBuffer2[RxCounter2++] =USART_ReceiveData(USART2);//½ÓÊÕÄ£¿éµÄÊý¾Ý } }
#ifndef __US100_H_ #define __US100_H_ void readTembuff(void); #endif
#ifndef __USART_H #define __USART_H #include "stdio.h" #include "stm32f10x.h" #define u8 int8_t #define u16 int16_t #define u32 int32_t void uart2_init(); void UART2_send_byte(char data); #endif







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