stm32使用固件库不使用中断的串口接收一串字符串的程序
时间: 2024-03-14 20:45:22 浏览: 82
以下是使用STM32固件库实现串口接收一串字符串的基本步骤:
1. 配置串口参数:波特率、数据位、停止位、校验位等。
```c
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_Init(USART1, &USART_InitStructure);
```
2. 启动串口。
```c
USART_Cmd(USART1, ENABLE);
```
3. 等待串口接收完成。
```c
while(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);
```
4. 读取接收数据。
```c
uint8_t data[64];
uint8_t index = 0;
do
{
data[index] = USART_ReceiveData(USART1);
index++;
} while(data[index - 1] != '\n' && index < 63);
data[index] = '\0';
```
在以上代码中,我们使用`USART_GetFlagStatus`函数等待串口接收完成,然后使用`USART_ReceiveData`函数读取接收缓冲区中的数据,直到接收到换行符或接收缓冲区溢出为止。
5. 处理接收到的数据。
```c
// 处理接收到的数据
// ...
```
通过以上步骤,我们就可以使用STM32固件库实现串口接收一串字符串的功能了。需要注意的是,在等待串口接收完成时,可以根据实际情况设置等待超时时间,避免程序一直阻塞在此处。
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