dma_transfer_number_config(DMA_CH2,sizeof(g_dma_rx_buf)); dma_channel_enable(DMA_CH2); /* 开启DMA传输 */ g_dma_rx_finish= 1; } } } 注意:dma_transfer_number_get是获取配置的接收数据长度减去已接收数据的长度,所以上面拷贝接收数据时用总长度减去了这个获取的剩余区间...
DMA_CH1);//关闭DMA,在没有读取该接收帧数据之前禁止DMA再接收数据// DMA_INTC0(DMA0) |= DMA_FLAG_ADD(DMA_CHINTF_RESET_VALUE, DMA_CH1);dma_memory_address_config(DMA0, DMA_CH1, DMA_MEMORY_0, (uint32_t)(recv_buf));// 存储器地址dma_transfer_number_config(DMA0,...
if(usart_interrupt_flag_get(BSP_USART,USART_INT_FLAG_IDLE) == SET)//检测到帧中断{ usart_data_receive(BSP_USART);//必须要读,读出来的值不能要/*处理DMA接收到的数据*/g_recv_length= ARRAYNUM(g_recv_buff) - dma_transfer_number_get(BSP_DMA, BSP_DMA_CH);//获取实际接收到的数据长度g_r...
中断触发时usart0_rx.rx_idle会被置1，接收函数大致如下 while (1) { if(usart0_rx.rx_idle ==...
dma_init_struct.number = 0;dma_init_struct.direction = DMA_MEMORY_TO_PERIPHERAL;dma_init...
if(usart_interrupt_flag_get(uartx->uart_x,USART_INT_FLAG_TC)!=RESET) { usart_interrupt_disable(uartx->uart_x, USART_INT_TC); usart_flag_clear(uartx->uart_x,USART_FLAG_TC); if( !(uartx->uart_mode_rx==MODE_DMA && dma_transfer_number_get(uartx->uart_tx_dma->dmax,uartx->uar...
uint32_tperiph_width;/*!< transfer data size of peripheral */ uint32_tmemory_addr;/*!< memory base address */ uint32_tmemory_width;/*!< transfer data size of memory */ uint32_tnumber;/*!< channel transfer number */ uint32_tpriority;/*!< channel priority level */ ...
dma_interrupt_flag_clear(DMA_CH2, DMA_INT_FLAG_G); dma_flag_clear(DMA_CH2, DMA_FLAG_G); Rx_num = dma_transfer_number_get(DMA_CH2); dma_transfer_number_config(DMA_CH2,RX_BUF_LEN); dma_channel_enable(DMA_CH2); } } 持续更新编码get到的新知识,新技能,持续分享心得体会。©...
dma_transfer_number_config(DMA_CH1,sizeof(RGB_buffer)); for(j=1;j<=num;++j) { for(i=0;i<24;++i) { if((rgb_value< }` 8、在主函数实现每隔 800ms 随机显示不同颜色功能。 `int main(void) { systick_config(); gpio_config(); ...
当系统模式控制器完成当前 DMA 传输时,将调用驱动程序的 EvtDmaTransactionDmaTransferComplete 事件回调函数。