STM32|STM32F334使用串口发送接收数据 STM32|STM32学习笔记

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; #ifdefVECT_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); #endif NVIC_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

【STM32|STM32F334使用串口发送接收数据】