以下内容出自 stm32f1xx_hal_uart.c [..] This subsection also provides a set of additional functions providing enhanced receptionservices to user. (For example, these functions allow application to handleuse caseswhere
Now it is time to understand which features to use to receive data with UART and DMA to offload CPU. As for the sake of this example, we use memory buffer array of20bytes. DMA will transfer data received from UART to this buffer. Listed are steps to begin. Initial assumption is that ...
handle->rxData = example_receivexfer.data; //还原缓冲区地址 } int main(void) { DisableGlobalIRQ(); board_init();//务必保留,本函数用于初始化MPU 时钟 调试串口 uart_init (USART_1, 115200,UART1_TX_B12,UART1_RX_B13); NVIC_SetPriority(LPUART1_IRQn,15); //设置串口中断优先级 范围0-15 ...
This is the 4th tutorial in the STM32 UART Series. In this tutorial we will use the DMA to receive the data in the normal and circular mode..
* This parameter can be one of the following values: * USART1, USART2, USART3, UART4 or UART5. * @retval The received data. */ uint16_t USART_ReceiveData(USART_TypeDef* USARTx) { /* Check the parameters */ assert_param(IS_USART_ALL_PERIPH(USARTx)); /* Receive Data */ return...
uint8_t receive_buffer[256];externTIM_HandleTypeDef htim7;staticvoiderror_handler(void) {while(1); }staticvoidbsp_uart1_gpio_cfg(void) { GPIO_InitTypeDef GPIO_InitStruct= {0}; __HAL_RCC_GPIOA_CLK_ENABLE();/**USART1 GPIO Configuration ...
Now it is time to understand which features to use to receive data with UART and DMA to offload CPU. As for the sake of this example, we use memory buffer array of20bytes. DMA will transfer data received from UART to this buffer. ...
读到的数据长度 71 void UART4_Receive_Data(u8 *buf) 72 { 73 u8 rxlen=21; 74 u8 i=0; 75 delay_ms(10); //等待10ms,连续超过10ms没有接收到一个数据,则认为接收结束 76 77 RS485_RX_FLAG = 0; 78 if((UART4_RX_BUF[0]==0x01)&&(UART4_RX_BUF[1]==0x03)) 79 { 80 for(i=...
126 void UART4_IRQHandler(void) //UART4 Receive Interrupt 127 { 128 u8 Res; 129 130 if(USART_GetITStatus(UART4, USART_IT_RXNE) != RESET) //接收中断(接收到的数据必须是0x0d 0x0a结尾) 131 { 132 Res =USART_ReceiveData(UART4);//(USART1->DR); //读取接收到的数据 ...
Combine UART + DMA for data reception Now it is time to understand which features to use to receive data with UART and DMA to offload CPU. As for the sake of this example, we use memory buffer array of20bytes. DMA will transfer data received from UART to this buffer. ...