GD32F103和GD32E230在串口接收模式(dma + idle)的区别

先上GD32E230的串口DMA代码。

static void uart_dma_init(void)
{
   
   
    /* enable DMA clock */
    rcu_periph_clock_enable(RCU_DMA);
    /*configure DMA interrupt*/
    // nvic_irq_enable(DMA_Channel1_2_IRQn, 1);

    /* initialize DMA channel2 */
    dma_deinit(DMA_CH2);
    dma_init_struct.direction = DMA_PERIPHERAL_TO_MEMORY;
    dma_init_struct.memory_addr = (uint32_t)uart0.rx_array;
    dma_init_struct.memory_inc = DMA_MEMORY_INCREASE_ENABLE;
    dma_init_struct.memory_width = DMA_MEMORY_WIDTH_8BIT;
    dma_init_struct.number = 0x100;
    dma_init_struct.periph_addr = USART0_RDATA_ADDRESS;
    dma_init_struct.periph_inc = DMA_PERIPH_INCREASE_DISABLE;
    dma_init_struct.memory_width = DMA_PERIPHERAL_WIDTH_8BIT;
    dma_init_struct.priority = DMA_PRIORITY_ULTRA_HIGH;
    dma_init(DMA_CH2, &dma_init_struct);

    /* configure DMA mode