UART_Receive_len= UART_RX_LEN -DMA_GetCurrDataCounter(DMA2_Stream2); UART_Buffer[UART_Receive_len]=0; DMA_SetCurrDataCounter(DMA2_Stream2,UART_RX_LEN); DMA_ClearFlag(DMA2_Stream2, DMA_FLAG_TCIF2); DMA_Cmd(DMA2_Stream2, ENABLE); }intmain(void) { UART_Receive_flg=0; Uart_Reveice_DM...
STM32F407的DMA2控制器支持存储器到存储器（mem-to-mem）模式，可以在内存之间传输数据。在配置DMA2...
DMA_ClearFlag(DMA2_Stream2, DMA_FLAG_FEIF2 | DMA_FLAG_DMEIF2 | DMA_FLAG_TEIF2 | DMA_FLAG_...
DMA_Cmd(DMA2_Stream2, DISABLE); UART_Receive_flg=1; UART_Receive_len= UART_RX_LEN -DMA_GetCurrDataCounter(DMA2_Stream2); UART_Buffer[UART_Receive_len]=0; DMA_SetCurrDataCounter(DMA2_Stream2,UART_RX_LEN); DMA_ClearFlag(DMA2_Stream2, DMA_FLAG_TCIF2); DMA_Cmd(DMA2_Stream2, ENABLE); ...
}else{printf("RX SUCCESSFUL!!!\r\n"); } }DMA_ClearFlag(DMA2_Stream2, DMA_FLAG_TCIF2);//清楚标志位}
DMA_InitTypeDef DMA_InitStructure;RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);/* USART3_RX GPIOB.11 */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;GPIO_InitStructure.GPIO_...
DMA_Init(DMA1_Stream2,&DMA_InitStructure);// 使能串口 USART_Cmd(UART4, ENABLE);/* Enable DMA...
DMA_Cmd(DMA2_Stream2,DISABLE);//清除标志位 DMA_ClearFlag(DMA2_Stream2,DMA_FLAG_TCIF4);RS485_...
DMA_FLAG_TCIF0_4就是指DMA的Stream0或Stream4, DMA_FLAG_TCIF1_5就是指DMA的Stream1或Stream5, DMA_FLAG_TCIF2_6就是指DMA的Stream2或Stream6, DMA_FLAG_TCIF3_7就是指DMA的Stream3或Stream7。 例如,在STM32F4xx系列中,使用DMA进行串口发送的时候, ...
DMA_ClearFlag(DMA2_Stream2,DMA_FLAG_TCIF2); if(uart_rx_tx_buf[0]=='C') { Set_1_rate(uart_rx_tx_buf[1]); } DMA_Cmd(DMA1_Stream6, ENABLE); //使能USART2的串口发送DMA } } void DMA2_Stream7_IRQHandler(void) { if(DMA_GetITStatus(DMA2_Stream7,DMA_IT_TCIF7)==SET) //串口...