STM32G4HAL库-串口空闲中断接收不定长数据并且将数据保存到数组里面完整代码
时间: 2023-08-07 07:03:21 浏览: 53
好的,下面是一个简单的示例代码,可以在STM32G4HAL库中使用空闲中断接收不定长数据,并将数据保存到数组中:
```c
#include "main.h"
#include "stm32g4xx_hal.h"
#define BUFFER_SIZE 100
UART_HandleTypeDef huart2;
uint8_t rx_buffer[BUFFER_SIZE];
uint8_t rx_data = 0;
uint16_t rx_index = 0;
uint8_t data_received = 0;
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART2_UART_Init(void);
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_USART2_UART_Init();
while (1)
{
if (data_received == 1)
{
data_received = 0;
// Do something with the received data
// ...
// Clear the buffer
rx_index = 0;
memset(rx_buffer, 0, sizeof(rx_buffer));
}
}
}
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
if (huart == &huart2)
{
if (rx_index < BUFFER_SIZE)
{
rx_buffer[rx_index++] = rx_data;
HAL_UART_Receive_IT(&huart2, &rx_data, 1);
}
else
{
// Error: buffer overflow
rx_index = 0;
memset(rx_buffer, 0, sizeof(rx_buffer));
}
}
}
void HAL_UART_IDLECallback(UART_HandleTypeDef *huart)
{
if (huart == &huart2)
{
data_received = 1;
}
}
void MX_USART2_UART_Init(void)
{
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;
if (HAL_UART_Init(&huart2) != HAL_OK)
{
Error_Handler();
}
HAL_UART_Receive_IT(&huart2, &rx_data, 1);
}
void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF7_USART2;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLM = 16;
RCC_OscInitStruct.PLL.PLLN = 192;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV4;
RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV4;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)
{
Error_Handler();
}
}
```
在上面的代码中,我们使用了`HAL_UART_Receive_IT()`函数来启动串口接收中断,并使用空闲中断回调函数`HAL_UART_IDLECallback()`来处理接收到的数据。当空闲中断被触发时,我们将`data_received`标志设置为1,以指示有新的数据已经接收完毕。在主循环中,我们检查`data_received`标志是否被设置为1,如果是,则处理接收到的数据,并清空接收缓冲区。
需要注意的是,在`HAL_UART_RxCpltCallback()`回调函数中,我们使用了递归调用`HAL_UART_Receive_IT()`函数来连续接收串口数据。如果接收到的数据超过了缓冲区的大小,我们会清空缓冲区并返回错误,以避免数据丢失。
希望这个示例代码可以帮助到你!