esp3266与stm32l151怎样通信
时间: 2023-09-04 22:06:45 浏览: 44
ESP8266和STM32L151可以通过串口进行通信。您可以将ESP8266的TX引脚连接到STM32L151的RX引脚,将ESP8266的RX引脚连接到STM32L151的TX引脚。然后,您可以使用STM32L151的UART接口来与ESP8266进行通信。您需要配置STM32L151的UART接口,以便发送和接收数据。下面是一个简单的示例代码,可以让STM32L151通过UART与ESP8266通信:
```c
#include "stm32l1xx.h"
#define UART_TX_PIN GPIO_Pin_2
#define UART_RX_PIN GPIO_Pin_3
void init_uart(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = UART_TX_PIN | UART_RX_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_USART2);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_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_Cmd(USART2, ENABLE);
}
uint8_t uart_read_byte(void)
{
while (USART_GetFlagStatus(USART2, USART_FLAG_RXNE) == RESET);
return USART_ReceiveData(USART2);
}
void uart_write_byte(uint8_t data)
{
while (USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET);
USART_SendData(USART2, data);
}
int main(void)
{
init_uart();
while (1)
{
// 从ESP8266读取数据
uint8_t data = uart_read_byte();
// 处理数据
// 发送数据到ESP8266
uart_write_byte(data);
}
}
```
请注意,此示例代码仅用于演示如何使用UART接口与ESP8266通信。您需要根据您的应用程序需求进行修改。