HAL库串口2获取接收中断的数据串口1并打印出来
时间: 2023-06-13 09:08:12 浏览: 86
stm32串口2接收数据串口1打印
假设你使用的是STM32系列的单片机,并且已经配置好了串口1和串口2的HAL库函数,你可以使用以下代码来实现串口2接收串口1的数据并打印出来:
```c
#include "stm32f4xx_hal.h"
UART_HandleTypeDef huart1;
UART_HandleTypeDef huart2;
uint8_t rx_data;
uint8_t rx_buffer[50];
uint8_t rx_index = 0;
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
if(huart->Instance == USART1)
{
HAL_UART_Transmit(&huart2, &rx_data, 1, 100);
rx_buffer[rx_index] = rx_data;
rx_index++;
if(rx_data == '\n')
{
HAL_UART_Transmit(&huart2, rx_buffer, rx_index, 100);
rx_index = 0;
}
}
}
int main(void)
{
HAL_Init();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_USART1_CLK_ENABLE();
__HAL_RCC_USART2_CLK_ENABLE();
GPIO_InitTypeDef GPIO_InitStruct = {0};
GPIO_InitStruct.Pin = GPIO_PIN_9 | GPIO_PIN_10;
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_USART1;
HAL_GPIO_Init(GPIOA, &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);
huart1.Instance = USART1;
huart1.Init.BaudRate = 115200;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_TX_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart1.Init.OverSampling = UART_OVERSAMPLING_16;
HAL_UART_Init(&huart1);
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(&huart1, &rx_data, 1);
while (1)
{
}
}
```
在这个代码中,我们使用了STM32的HAL库函数来初始化了串口1和串口2,并且开启了串口1的接收中断。在串口1接收到一个字节的数据时,我们通过HAL_UART_RxCpltCallback()回调函数来处理这个数据。在这个函数中,我们将接收到的数据发送到串口2并保存到rx_buffer数组中,同时为了区分不同的数据包,我们在接收到换行符时打印出rx_buffer中的数据并将rx_index重置为0。这样就可以实现串口2接收串口1的数据并打印出来的功能了。
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