可以写一个stm32串口初始化程序吗
时间: 2023-04-08 09:00:31 浏览: 56
可以,以下是一个简单的示例:
#include "stm32f4xx.h"
void USART2_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
USART_InitTypeDef USART_InitStruct;
NVIC_InitTypeDef NVIC_InitStruct;
// Enable GPIOA clock
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
// Enable USART2 clock
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
// Configure PA2 as USART2_TX
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_InitStruct);
// Configure PA3 as USART2_RX
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_InitStruct);
// Connect PA2 to USART2_TX
GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_USART2);
// Connect PA3 to USART2_RX
GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_USART2);
// Configure USART2
USART_InitStruct.USART_BaudRate = 115200;
USART_InitStruct.USART_WordLength = USART_WordLength_8b;
USART_InitStruct.USART_StopBits = USART_StopBits_1;
USART_InitStruct.USART_Parity = USART_Parity_No;
USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStruct.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART2, &USART_InitStruct);
// Enable USART2 interrupt
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);
// Enable USART2
USART_Cmd(USART2, ENABLE);
}
注意:以上代码仅供参考,具体实现可能需要根据具体的硬件和需求进行修改。