基于stm32的单片机与GY-39串口模式连接(C语言,keil5,以传感器技术为基础,结合嵌入式网关开发技术,以 Cortex-M3,外接温度、湿度、,海拔,气压,烟雾传感器,设置波特率参数,GPIO口)代码
时间: 2024-03-12 20:47:28 浏览: 49
一种基于STM32的系统及串口通信的实现
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由于这个问题涉及到的代码较多,我只能提供一个简单的实例代码,供您参考:
```c
#include "stm32f10x.h"
#include "stdio.h"
#define USARTx USART1
#define USARTx_IRQn USART1_IRQn
#define USARTx_IRQHandler USART1_IRQHandler
#define USARTx_GPIO GPIOA
#define USARTx_GPIO_CLK RCC_APB2Periph_GPIOA
#define USARTx_CLK RCC_APB2Periph_USART1
#define USARTx_TX GPIO_Pin_9
#define USARTx_RX GPIO_Pin_10
#define BAUDRATE 9600
USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
void USARTx_Configuration(void)
{
/* Enable GPIO clock */
RCC_APB2PeriphClockCmd(USARTx_GPIO_CLK | RCC_APB2Periph_AFIO, ENABLE);
/* Enable USART clock */
RCC_APB2PeriphClockCmd(USARTx_CLK, ENABLE);
/* Configure USART Tx and Rx as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = USARTx_TX | USARTx_RX;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(USARTx_GPIO, &GPIO_InitStructure);
/* USART configuration */
USART_InitStructure.USART_BaudRate = 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(USARTx, &USART_InitStructure);
/* Enable USART interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USARTx_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Enable USART */
USART_Cmd(USARTx, ENABLE);
}
void USARTx_IRQHandler(void)
{
if (USART_GetFlagStatus(USARTx, USART_FLAG_RXNE) == SET)
{
uint16_t data = USART_ReceiveData(USARTx);
USART_SendData(USARTx, data);
}
}
int main(void)
{
USARTx_Configuration();
while (1)
{
// TODO: read sensor data and send via USART
}
}
```
以上代码实现了通过USART1与其他外设进行通信,并且配置了波特率参数为9600,GPIO口为PA9和PA10。在程序中,可以通过读取传感器数据并将其发送到USARTx中,实现与GY-39模块的串口通信。需要注意的是,具体的传感器读取和处理代码需要根据实际情况进行编写。
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