【LoRa 模块免费送】LoRa 通讯之二：STM32F4+模块和PC互通
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;
/* 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 ---------------------------------------------------------*/
/**
* @briefMain program
* @paramNone
* @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);
}
}
}
7，打开串口调试助手和编译运行429板子开始测试
8，按下429用户键，串口4收到429板子通过模块空中发来的消息。
9，串口4发送消息，429板子能收到数据10，429板子用 电池供电 ，串口4每一秒发送一次数据，429的LED4每秒闪动一次，这样就可以测试距离了。10，已经测试，初步估算1.5公里。细节有时间汇报。
1.5公里。电梯里面无信号。
厉害了
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