GD32F103RC DMA+空闲中断，simulator仿真，不能触发空闲中断

void nvic_init(void)

{

                nvic_priority_group_set(NVIC_PRIGROUP_PRE2_SUB2);

                nvic_irq_enable(USART1_IRQn, 0,0);

}

int main(void)

{



    /* configure systick */

    systick_config();



    nvic_init(); 

    /* configure EVAL_COM0 */

                gd_eval_com_init(USART1);

     

        /* configure USART DMA */

    usart_dma_config();

    

    /* enable USART0 DMA channel transmission and reception */

    dma_channel_enable(DMA0, DMA_CH5);

    

    /* USART DMA enable for transmission and reception */

    usart_dma_receive_config(USART1, USART_DENR_ENABLE);//USART_CTL2 DENR µÚ6bit

                usart_dma_transmit_config(USART1, USART_DENT_ENABLE);

        

          

    

    while(1){;}

}

void gd_eval_com_init(uint32_t com)

{



    

    /* enable GPIO clock */

    rcu_periph_clock_enable(RCU_GPIOA);



    /* enable USART clock */

    rcu_periph_clock_enable(RCU_USART1);



    /* connect port to USARTx_Tx */

    gpio_init(GPIOA, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_2);



    /* connect port to USARTx_Rx */

    gpio_init(GPIOA, GPIO_MODE_IN_FLOATING, GPIO_OSPEED_50MHZ, GPIO_PIN_3);



    /* USART configure */

    usart_deinit(com);

    usart_baudrate_set(com, 9600U);

    usart_word_length_set(com, USART_WL_8BIT);

    usart_stop_bit_set(com, USART_STB_1BIT);

    usart_parity_config(com, USART_PM_NONE);



    usart_receive_config(com, USART_RECEIVE_ENABLE);

    usart_transmit_config(com, USART_TRANSMIT_ENABLE);

<blockquote>usart_interrupt_enable(com, USART_INT_IDLE);

void usart_dma_config(void)

{

    dma_parameter_struct dma_init_struct;

    /* enable DMA0 */

    rcu_periph_clock_enable(RCU_DMA0);

    /* deinitialize DMA channel3(USART0 tx) */

    dma_deinit(DMA0, DMA_CH5);

    dma_init_struct.direction = DMA_PERIPHERAL_TO_MEMORY;

    dma_init_struct.memory_addr = (uint32_t)rx_buffer;

    dma_init_struct.memory_inc = DMA_MEMORY_INCREASE_ENABLE;

    dma_init_struct.memory_width = DMA_MEMORY_WIDTH_8BIT;

    dma_init_struct.number = ARRAYNUM(tx_buffer);

    dma_init_struct.periph_addr = USART1_DATA_ADDRESS;

    dma_init_struct.periph_inc = DMA_PERIPH_INCREASE_DISABLE;

    dma_init_struct.periph_width = DMA_PERIPHERAL_WIDTH_8BIT;

    dma_init_struct.priority = DMA_PRIORITY_ULTRA_HIGH;

    dma_init(DMA0, DMA_CH5, &dma_init_struct);

    /* configure DMA mode */

    dma_circulation_disable(DMA0, DMA_CH5);

    dma_memory_to_memory_disable(DMA0, DMA_CH5);

}

void USART1_IRQHandler(void)

{



<blockquote><span style="white-space:pre">        </span>if(SET == usart_interrupt_flag_get(USART1, USART_INT_FLAG_IDLE))