.c文件中：
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitStructure.NVIC_IRQChannel = DEBUG_USART_IRQ;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = DEBUG_USART2_IRQ; /* 配置USART为中断源 */
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; /* 抢断优先级为1 */
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; /* 子优先级为1 */
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; /* 使能中断 */
NVIC_Init(&NVIC_InitStructure); /* 初始化配置NVIC */
}
void Debug_USART_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
RCC_AHB1PeriphClockCmd(DEBUG_USART_RX_GPIO_CLK|DEBUG_USART_TX_GPIO_CLK,ENABLE);
RCC_APB2PeriphClockCmd(DEBUG_USART_CLK, ENABLE);
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Pin = DEBUG_USART_TX_PIN ;
GPIO_Init(DEBUG_USART_TX_GPIO_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Pin = DEBUG_USART_RX_PIN;
GPIO_Init(DEBUG_USART_RX_GPIO_PORT, &GPIO_InitStructure);
GPIO_PinAFConfig(DEBUG_USART_RX_GPIO_PORT,DEBUG_USART_RX_SOURCE,DEBUG_USART_RX_AF);
GPIO_PinAFConfig(DEBUG_USART_TX_GPIO_PORT,DEBUG_USART_TX_SOURCE,DEBUG_USART_TX_AF);
USART_InitStructure.USART_BaudRate = DEBUG_USART_BAUDRATE;
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(DEBUG_USART, &USART_InitStructure);
USART_ITConfig(DEBUG_USART, USART_IT_RXNE, ENABLE);
USART_Cmd(DEBUG_USART, ENABLE);
}
//****************串口2****************************
void DEBUG_USART2_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
RCC_AHB1PeriphClockCmd(DEBUG_USART2_RX_GPIO_CLK|DEBUG_USART2_TX_GPIO_CLK,ENABLE);
RCC_APB1PeriphClockCmd(DEBUG_USART2_CLK, ENABLE);
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Pin = DEBUG_USART2_TX_PIN ;
GPIO_Init(DEBUG_USART2_TX_GPIO_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Pin = DEBUG_USART2_RX_PIN;
GPIO_Init(DEBUG_USART2_RX_GPIO_PORT, &GPIO_InitStructure);
GPIO_PinAFConfig(DEBUG_USART2_RX_GPIO_PORT,DEBUG_USART2_RX_SOURCE,DEBUG_USART2_RX_AF); /* 连接 PXx 到 USARTx_Tx*/
GPIO_PinAFConfig(DEBUG_USART2_TX_GPIO_PORT,DEBUG_USART2_TX_SOURCE,DEBUG_USART2_TX_AF); /* 连接 PXx 到 USARTx__Rx*/
USART_InitStructure.USART_BaudRate = DEBUG_USART2_BAUDRATE; /* 波特率设置：DEBUG_USART_BAUDRATE */
USART_InitStructure.USART_WordLength = USART_WordLength_8b; /* 字长(数据位+校验位)：8 */
USART_InitStructure.USART_StopBits = USART_StopBits_1; /* 停止位：1个停止位 */
USART_InitStructure.USART_Parity = USART_Parity_No; /* 校验位选择：不使用校验 */
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; /* 硬件流控制：不使用硬件流 */
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; /* USART模式控制：同时使能接收和发送 */
USART_Init(DEBUG_USART2, &USART_InitStructure); /* 完成USART初始化配置 */
USART_ITConfig(DEBUG_USART2, USART_IT_RXNE, ENABLE); /* 使能串口接收中断 */
USART_ITConfig(DEBUG_USART2, USART_IT_IDLE, ENABLE);/* 使能串口帧检测中断 */
USART_Cmd(DEBUG_USART2, ENABLE); /* 使能串口 */
}
//****************串口3****************************
void DEBUG_USART3_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
RCC_AHB1PeriphClockCmd(DEBUG_USART3_RX_GPIO_CLK|DEBUG_USART3_TX_GPIO_CLK,ENABLE);
RCC_APB1PeriphClockCmd(DEBUG_USART3_CLK, ENABLE);
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Pin = DEBUG_USART3_TX_PIN ;
GPIO_Init(DEBUG_USART3_TX_GPIO_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Pin = DEBUG_USART3_RX_PIN;
GPIO_Init(DEBUG_USART3_RX_GPIO_PORT, &GPIO_InitStructure);
GPIO_PinAFConfig(DEBUG_USART3_RX_GPIO_PORT,DEBUG_USART3_RX_SOURCE,DEBUG_USART3_RX_AF); /* 连接 PXx 到 USARTx_Tx*/
GPIO_PinAFConfig(DEBUG_USART3_TX_GPIO_PORT,DEBUG_USART3_TX_SOURCE,DEBUG_USART3_TX_AF); /* 连接 PXx 到 USARTx__Rx*/
USART_InitStructure.USART_BaudRate = DEBUG_USART3_BAUDRATE; /* 波特率设置：DEBUG_USART_BAUDRATE */
USART_InitStructure.USART_WordLength = USART_WordLength_8b; /* 字长(数据位+校验位)：8 */
USART_InitStructure.USART_StopBits = USART_StopBits_1; /* 停止位：1个停止位 */
USART_InitStructure.USART_Parity = USART_Parity_No; /* 校验位选择：不使用校验 */
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; /* 硬件流控制：不使用硬件流 */
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; /* USART模式控制：同时使能接收和发送 */
USART_Init(DEBUG_USART3, &USART_InitStructure); /* 完成USART初始化配置 */
USART_ITConfig(DEBUG_USART3, USART_IT_RXNE, ENABLE); /* 使能串口接收中断 */
USART_ITConfig(DEBUG_USART3, USART_IT_IDLE, ENABLE);/* 使能串口帧检测中断 */
USART_Cmd(DEBUG_USART3, ENABLE); /* 使能串口 */
}
.h文件中
#include "stm32f4xx.h"
#include <stdio.h>
//引脚定义
/*******************************************************/
#define DEBUG_USART USART1
#define DEBUG_USART_CLK RCC_APB2Periph_USART1
#define DEBUG_USART_BAUDRATE 115200 //串口波特率
#define DEBUG_USART_RX_GPIO_PORT GPIOA
#define DEBUG_USART_RX_GPIO_CLK RCC_AHB1Periph_GPIOA
#define DEBUG_USART_RX_PIN GPIO_Pin_10
#define DEBUG_USART_RX_AF GPIO_AF_USART1
#define DEBUG_USART_RX_SOURCE GPIO_PinSource10
#define DEBUG_USART_TX_GPIO_PORT GPIOA
#define DEBUG_USART_TX_GPIO_CLK RCC_AHB1Periph_GPIOA
#define DEBUG_USART_TX_PIN GPIO_Pin_9
#define DEBUG_USART_TX_AF GPIO_AF_USART1
#define DEBUG_USART_TX_SOURCE GPIO_PinSource9
#define DEBUG_USART_IRQHandler USART1_IRQHandler
#define DEBUG_USART_IRQ USART1_IRQn
/************************************************************/
//串口2引脚定义
/*******************************************************/
#define DEBUG_USART2 USART2
#define DEBUG_USART2_CLK RCC_APB1Periph_USART2
#define DEBUG_USART2_BAUDRATE 9600 //串口波特率
#define DEBUG_USART2_RX_GPIO_PORT GPIOD
#define DEBUG_USART2_RX_GPIO_CLK RCC_AHB1Periph_GPIOD
#define DEBUG_USART2_RX_PIN GPIO_Pin_6
#define DEBUG_USART2_RX_AF GPIO_AF_USART2
#define DEBUG_USART2_RX_SOURCE GPIO_PinSource6
#define DEBUG_USART2_TX_GPIO_PORT GPIOD
#define DEBUG_USART2_TX_GPIO_CLK RCC_AHB1Periph_GPIOD
#define DEBUG_USART2_TX_PIN GPIO_Pin_5
#define DEBUG_USART2_TX_AF GPIO_AF_USART2
#define DEBUG_USART2_TX_SOURCE GPIO_PinSource5
#define DEBUG_USART2_IRQHandler USART2_IRQHandler
#define DEBUG_USART2_IRQ USART2_IRQn
/************************************************************/
//串口3引脚定义
/*******************************************************/
#define DEBUG_USART3 USART3
#define DEBUG_USART3_CLK RCC_APB1Periph_USART3
#define DEBUG_USART3_BAUDRATE 9600 //串口波特率
#define DEBUG_USART3_RX_GPIO_PORT GPIOB
#define DEBUG_USART3_RX_GPIO_CLK RCC_AHB1Periph_GPIOB
#define DEBUG_USART3_RX_PIN GPIO_Pin_11
#define DEBUG_USART3_RX_AF GPIO_AF_USART3
#define DEBUG_USART3_RX_SOURCE GPIO_PinSource11
#define DEBUG_USART3_TX_GPIO_PORT GPIOB
#define DEBUG_USART3_TX_GPIO_CLK RCC_AHB1Periph_GPIOB
#define DEBUG_USART3_TX_PIN GPIO_Pin_10
#define DEBUG_USART3_TX_AF GPIO_AF_USART3
#define DEBUG_USART3_TX_SOURCE GPIO_PinSource10
#define DEBUG_USART3_IRQHandler USART3_IRQHandler
#define DEBUG_USART3_IRQ USART3_IRQn
/************************************************************/
void NVIC_Configuration(void);
void Debug_USART_Config(void);
void DEBUG_USART2_Config(void);
void DEBUG_USART3_Config(void);
