STM32H743VIT6单片机 写蓝牙测试程序
时间: 2024-01-20 11:02:22 浏览: 165
以下是一个简单的蓝牙测试程序,使用STM32H743VIT6单片机和UART1与蓝牙模块进行通信。假设蓝牙模块使用115200波特率,8位数据位,无校验位和1个停止位。
首先,需要在CubeMX中启用UART1,并设置它的波特率为115200。然后在代码中添加以下头文件和变量:
```c
#include "stm32h7xx.h"
#include <string.h>
#define TXBUFFERSIZE 100
#define RXBUFFERSIZE 100
uint8_t aTxBuffer[TXBUFFERSIZE];
uint8_t aRxBuffer[RXBUFFERSIZE];
```
接下来,需要在main函数中初始化UART1,并将其设置为中断模式。在初始化过程中,需要设置UART的参数如下:
```c
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;
huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart1) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_EnableFifoMode(&huart1) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_EnableFifoMode(&huart1) != HAL_OK)
{
Error_Handler();
}
if (HAL_UART_Receive_IT(&huart1, (uint8_t *)aRxBuffer, 1) != HAL_OK)
{
Error_Handler();
}
```
接下来,需要在main函数中添加一个无限循环,以等待用户输入并将其发送到蓝牙模块。发送数据时,需要在数据的末尾添加回车符和换行符。
```c
while (1)
{
HAL_UART_Receive_IT(&huart1, (uint8_t *)aRxBuffer, 1);
if (strlen((char *)aTxBuffer))
{
strcat((char *)aTxBuffer, "\r\n");
HAL_UART_Transmit_IT(&huart1, (uint8_t *)aTxBuffer, strlen((char *)aTxBuffer));
memset(aTxBuffer, 0, sizeof(aTxBuffer));
}
}
```
最后,需要添加一个UART1的中断处理程序,以接收从蓝牙模块发送的数据。
```c
void USART1_IRQHandler(void)
{
HAL_UART_IRQHandler(&huart1);
}
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
if (huart->Instance == USART1)
{
strcat((char *)aTxBuffer, (char *)aRxBuffer);
HAL_UART_Receive_IT(&huart1, (uint8_t *)aRxBuffer, 1);
}
}
```
现在就可以编译和下载代码到STM32H743VIT6单片机,并使用串口调试助手或其他蓝牙模块与之进行通信了。
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