STM32用串口3控制HC-05蓝牙模块进行通信
时间: 2024-05-07 20:22:01 浏览: 157
好的,下面是基于STM32的串口3与HC-05蓝牙模块进行通信的步骤:
1. 首先,需要在代码中定义串口3的引脚。例如:
```c
#define USART_TX_Pin GPIO_PIN_10
#define USART_TX_GPIO_Port GPIOB
#define USART_RX_Pin GPIO_PIN_11
#define USART_RX_GPIO_Port GPIOB
```
2. 然后,需要初始化串口3。例如:
```c
huart3.Instance = USART3;
huart3.Init.BaudRate = 9600;
huart3.Init.WordLength = UART_WORDLENGTH_8B;
huart3.Init.StopBits = UART_STOPBITS_1;
huart3.Init.Parity = UART_PARITY_NONE;
huart3.Init.Mode = UART_MODE_TX_RX;
huart3.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart3.Init.OverSampling = UART_OVERSAMPLING_16;
if (HAL_UART_Init(&huart3) != HAL_OK)
{
Error_Handler();
}
```
3. 接下来,需要将串口3与HC-05蓝牙模块进行连接。在HC-05模块上,需要将KEY脚接到高电平,以进入AT命令模式。然后,使用AT指令将HC-05模块设置为从机模式,并设置蓝牙名称和密码。例如:
```c
HAL_UART_Transmit(&huart3, "AT+ROLE=0\r\n", strlen("AT+ROLE=0\r\n"), 1000);
HAL_Delay(500);
HAL_UART_Transmit(&huart3, "AT+NAME=MyHC05\r\n", strlen("AT+NAME=MyHC05\r\n"), 1000);
HAL_Delay(500);
HAL_UART_Transmit(&huart3, "AT+PSWD=1234\r\n", strlen("AT+PSWD=1234\r\n"), 1000);
HAL_Delay(500);
```
4. 最后,可以使用HAL库中的串口发送和接收函数,与HC-05模块进行通信。例如:
```c
char rx_buffer[10];
HAL_UART_Receive(&huart3, (uint8_t *)rx_buffer, 10, 1000);
HAL_UART_Transmit(&huart3, "Hello World!\r\n", strlen("Hello World!\r\n"), 1000);
```
以上就是基于STM32的串口3与HC-05蓝牙模块进行通信的步骤,希望能帮到你。
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