编写使用空闲中断接受串口数据hal库
时间: 2024-02-26 14:57:19 浏览: 11
好的,我可以为您提供一份使用HAL库编写空闲中断接收串口数据的代码。请参考下面的代码:
```c
#include "stm32f4xx_hal.h"
#define RX_BUFFER_SIZE 128
UART_HandleTypeDef huart2;
uint8_t rxBuffer[RX_BUFFER_SIZE];
uint8_t rxData;
uint8_t rxIndex = 0;
uint8_t rxReady = 0;
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
if (huart->Instance == USART2)
{
if (rxData != '\n')
{
rxBuffer[rxIndex++] = rxData;
}
else
{
rxBuffer[rxIndex] = '\0'; // Add null-terminator
rxReady = 1;
rxIndex = 0;
}
HAL_UART_Receive_IT(&huart2, &rxData, 1); // Start listening for next byte
}
}
int main(void)
{
HAL_Init();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_USART2_CLK_ENABLE();
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_InitStruct.Pin = GPIO_PIN_2 | GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF7_USART2;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
huart2.Instance = USART2;
huart2.Init.BaudRate = 115200;
huart2.Init.WordLength = UART_WORDLENGTH_8B;
huart2.Init.StopBits = UART_STOPBITS_1;
huart2.Init.Parity = UART_PARITY_NONE;
huart2.Init.Mode = UART_MODE_TX_RX;
huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart2.Init.OverSampling = UART_OVERSAMPLING_16;
HAL_UART_Init(&huart2);
HAL_UART_Receive_IT(&huart2, &rxData, 1); // Start listening for first byte
while (1)
{
if (rxReady)
{
// Do something with received data
printf("Received: %s\r\n", rxBuffer);
rxReady = 0;
}
}
}
```
这段代码实现了使用空闲中断接收串口数据,当接收到一个“\n”字符时,将会触发空闲中断并将接收到的数据存储在缓冲区中。在主函数中可以通过判断`rxReady`变量是否为1来判断是否有数据接收完成。如果有数据接收完成,则可以通过`rxBuffer`变量来获取接收到的数据。