STM32F334使用串口发送接收数据

来源：互联网发布：男生知乎编辑：程序博客网时间：2024/06/05 09:15

MCU：STM32F334C8T6

Frameware：STM32F3348-Discovery_FW_V1.0.0

实现功能：

在PC使用串口调试助手向MCU发送字符(数据)，MCU将接收到的字符发回PC

代码：

#include "main.h"int main(){GPIO_Config();USART_Config();NVIC_Config();while(1);}void GPIO_Config(){GPIO_InitTypeDef GPIO_InitStructure;RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);GPIO_InitStructure.GPIO_Pin = (GPIO_Pin_3 | GPIO_Pin_4);   //USART2对应的RX,TX引脚GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;             //复用模式GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;         //推挽输出GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;GPIO_Init(GPIOB, &GPIO_InitStructure);//配置复用功能GPIO_PinAFConfig(GPIOB, GPIO_PinSource3, GPIO_AF_7);GPIO_PinAFConfig(GPIOB, GPIO_PinSource4, GPIO_AF_7);}void USART_Config(){USART_InitTypeDef USART_InitStructure;RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);USART_DeInit(USART2);USART_InitStructure.USART_BaudRate = 115200;USART_InitStructure.USART_WordLength = USART_WordLength_8b;USART_InitStructure.USART_StopBits = USART_StopBits_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);USART_ITConfig(USART2,USART_IT_RXNE,ENABLE);//使能中断USART_ClearFlag (USART2,USART_FLAG_TC);USART_Cmd(USART2, ENABLE);    //打开串口}void NVIC_Config(){NVIC_InitTypeDef NVIC_InitStruct;#ifdef  VECT_TAB_SRAM   NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0); //一定要设置中断向量表，否则可能出错#else    NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);   #endifNVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);NVIC_InitStruct.NVIC_IRQChannel = USART2_IRQn;NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0;NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0;NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;NVIC_Init(&NVIC_InitStruct);}//中断处理函数void USART2_IRQHandler (void){if (USART_GetFlagStatus(USART2,USART_FLAG_RXNE) ==SET){USART_SendData(USART2,USART_ReceiveData(USART2));//发送接收到的数据while (!USART_GetFlagStatus(USART2,USART_FLAG_TC));}USART_ClearITPendingBit(USART2,USART_IT_RXNE);//清中断标志位}

wind

2015,03,29

0 0