stm32单片机通过串口给esp8266发字符串“hello world”的代码
时间: 2023-12-14 09:03:19 浏览: 128
下面是一个基于STM32单片机和ESP8266模块的串口通信代码,可用于发送字符串“hello world”:
```c
#include "stm32f10x.h"
#include <stdio.h>
#include <string.h>
#define USART1_TX GPIO_Pin_9
#define USART1_RX GPIO_Pin_10
USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
void USART1_Init(void);
void GPIO_Configuration(void);
int main(void)
{
USART1_Init();
GPIO_Configuration();
// 发送“hello world”字符串
char *msg = "hello world";
int len = strlen(msg);
for (int i = 0; i < len; i++) {
USART_SendData(USART1, msg[i]);
while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);
}
while(1);
}
void USART1_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
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_Tx;
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
}
void GPIO_Configuration(void)
{
GPIO_InitStructure.GPIO_Pin = USART1_TX;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = USART1_RX;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
```
这段代码初始化了USART1和GPIOA,然后发送了字符串“hello world”到USART1。需要注意的是,发送数据时需要等待USART传输完成,否则可能会出现数据丢失的情况。
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