DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; /* 连续模式 */ DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh; DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; DMA_Init(DMA1_Channel5, &DMA_InitStructure); DMA_ITConfig(DMA1_Channel5, DMA_IT_TC|DMA_IT_HT|DMA_IT_TE, ENABLE);/* ...
if ((tmpisr & (DMA_FLAG_TEIF0_4 << hdma->StreamIndex)) != RESET) { if(__HAL_DMA_GET_IT_SOURCE(hdma, DMA_IT_TE) != RESET) { /* Disable the transfer error interrupt */ hdma->Instance->CR &= ~(DMA_IT_TE); /* Clear the transfer error flag */ regs->IFCR = DMA_FLA...
define its length and go) operation, this may not be the case for receive. Implementing DMA receive, application should understand number of received bytes to process by DMA before its considereddone. However, UART protocol does not offer such information (it could work with higher-level protocol...
dma_recv_isr(serial, UART_RX_DMA_IT_IDLE_FLAG); __HAL_UART_CLEAR_IDLEFLAG(&uart->handle); } else if (__HAL_UART_GET_FLAG(&(uart->handle), UART_FLAG_TC) && (__HAL_UART_GET_IT_SOURCE(&(uart->handle), UART_IT_TC) != RESET)) ...
(DMA1)){osThreadFlagsSet(uiCmdRevThreadId,EVT_UART_DMA_HALF_COMPLETE);LL_DMA_ClearFlag_HT5(DMA1);}}voidUSART2_IRQHandler(void){if(LL_USART_IsActiveFlag_IDLE(USART2)&&LL_USART_IsEnabledIT_IDLE(USART2)){osThreadFlagsSet(uiCmdRevThreadId,EVT_UART_RX_COMPLETE);LL_USART_ClearFlag_IDLE(...
{/*Disable the half transfer interrupt*/__HAL_DMA_DISABLE_IT(hdma, DMA_IT_HT); }/*Clear the half transfer complete flag*/__HAL_DMA_CLEAR_FLAG(hdma, __HAL_DMA_GET_HT_FLAG_INDEX(hdma));/*DMA peripheral state is not updated in Half Transfer*//*but in Transfer Complete case*/if...
RX: Receive HT: Half-Transfer Complete DMA event/flag TC: Transfer Complete DMA event/flag RTO: Receiver Timeout UART event/flag IRQ: Interrupt General about UART STM32 has peripherals such as USART, UART or LPUART. Difference between them is not relevant for this purpose since concept can ...
UART4_Rx_num=0;DMA_ClearFlag(DMA2_FLAG_GL3 | DMA2_FLAG_TC3 | DMA2_FLAG_TE3 | DMA2_...
//通道7传输完成中断TC 还有传输 过半中断HT 错误中断TE 全局中断GL{DMA_ClearITPendingBit(DMA2_IT_GL...
DMA : receiver timeout if (((isrflags & USART_ISR_RTOF) != 0U) && ((cr2its & USART_CR2_RTOEN) != 0U)) { // WARNING do not use HAL_UART_DMAStop(), as it stops ALL DMA streams on this UART (= Rx AND Tx) // stop Rx DMA transfer __HAL_DMA_DISABLE(h...