【LoRa 模块免费送】LoRa 通讯之二：STM32F4+模块和PC互通

damiaa 提问时间：2018-4-22 12:43 /

本帖最后由 damiaa 于 2018-4-23 11:57 编辑

【LoRa 模块免费送】LoRa 通讯之二：STM32F4+模块和PC互通1，准备电脑一台
2，模块2枚

4，下载STM32Cube_FW_F4_V1.21.0解压
5，打开串口通讯的例子
D:\st\stm32f429\en.stm32cubef4\STM32Cube_FW_F4_V1.21.0\Projects\STM32F429I-Discovery\Examples\UART\UART_TwoBoards_ComITModi
6，修改一下main.c如下：
uint8_t aTxBuffer[] = " ****Loar Test*** ";
uint8_t aRxBuffer[RXBUFFERSIZE];
/* Private function prototypes -----------------------------------------------*/
static void SystemClock_Config(void);
static void Error_Handler(void);
static uint16_t Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);
/* Private functions ---------------------------------------------------------*/
/**
  * @brief  Main program
  * @param  None
  * @retval None
  */
int main(void)
{

  HAL_Init();
  /* Configure LED3 and LED4 */
  BSP_LED_Init(LED3);
  BSP_LED_Init(LED4);

  /* Configure the system clock to 180 MHz */
  SystemClock_Config();

  /*##-1- Configure the UART peripheral ######################################*/
  /* Put the USART peripheral in the Asynchronous mode (UART Mode) */
  /* UART1 configured as follow:
   - Word Length = 8 Bits
   - Stop Bit = One Stop bit
   - Parity = None
   - BaudRate = 9600 baud
   - Hardware flow control disabled (RTS and CTS signals) */
  UartHandle.Instance       = USARTx;

  UartHandle.Init.BaudRate    = 9600;
  UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
  UartHandle.Init.StopBits    = UART_STOPBITS_1;
  UartHandle.Init.Parity    = UART_PARITY_NONE;
  UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  UartHandle.Init.Mode       = UART_MODE_TX_RX;
  UartHandle.Init.OverSampling = UART_OVERSAMPLING_16;
  if(HAL_UART_Init(&UartHandle) != HAL_OK)
  {
Error_Handler();
  }
  /* Configure USER Button */
  BSP_PB_Init(BUTTON_KEY, BUTTON_MODE_GPIO);
      while(1)
      {
            if(BSP_PB_GetState(BUTTON_KEY) != RESET)
            {
                     if(HAL_UART_Transmit_IT(&UartHandle, (uint8_t*)aTxBuffer, TXBUFFERSIZE)!= HAL_OK)
                     {
                              Error_Handler();
                     }
                     while (UartReady != SET)
                     {
                     }
                     UartReady = RESET;
                     /* Turn LED3 Off */
                     BSP_LED_On(LED3);
                     HAL_Delay(400);
                     BSP_LED_Off(LED3);
            }
            if(HAL_UART_Receive_IT(&UartHandle, (uint8_t *)aRxBuffer, RXBUFFERSIZE) == HAL_OK)
            {
                     BSP_LED_On(LED4);
                     HAL_Delay(200);
                     BSP_LED_Off(LED4);
            }
      }
}