GD32VF103C-START板的串口中断程序中,能实现发送数据,无法实现接收,是什么原因呢

mikew 发表于  2019-11-22 16:07:43

主函数如下:

#include "gd32vf103.h"
#include "gd32vf103v_eval.h"
#include "systick.h"
#include 

extern uint32_t rxbuffer[];
extern uint16_t rxcount;

extern FlagStatus g_receive_complete;


int main(void)
{
	/* USART interrupt configuration */
	eclic_global_interrupt_enable();
	eclic_priority_group_set(ECLIC_PRIGROUP_LEVEL3_PRIO1);
	eclic_irq_enable(USART0_IRQn, 1, 0);
	gd_eval_com_init(USART0);
	usart_interrupt_enable(USART0, USART_INT_RBNE);
while(1)
{
		if(g_receive_complete == SET) {
		rxcount = 0;
		g_receive_complete = RESET;
		delay_1ms(500);
		delay_1ms(500);
		printf("%dnr",rxbuffer[0]);
		printf("%dnr",rxbuffer[1]);
		printf("%dnr",rxbuffer[2]);
		printf("%dnr",rxbuffer[3]);
		printf("%dnr",rxbuffer[4]);
	          }
	}

}
/* retarget the C library printf function to the USART */
int _put_char(int ch)
{
    usart_data_transmit(USART0, (uint8_t) ch );
    while ( usart_flag_get(USART0, USART_FLAG_TBE)== RESET){
    }
    return ch;
}


中断函数如下:(可以进入中断,但是无法接收发送出去的数据)


uint32_t rxbuffer[RX_BUF_SIZE];
__IO uint16_t rxcount = 0;
__IO FlagStatus g_receive_complete = RESET;

void USART0_IRQHandler(void)
{
        if(RESET!=usart_interrupt_flag_get(USART0, USART_INT_FLAG_RBNE))
        {
        /* read one byte from the receive data register */
        rxbuffer[rxcount++] = (uint8_t)usart_data_receive(USART0); //

                    if(rxcount == RX_BUF_SIZE)
                   {
                	g_receive_complete = SET;
                	usart_interrupt_disable(USART0, USART_INT_RBNE);

                    }

        }
 }


1个回答
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admin

2019-11-28 17:00:14

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你可以参考这块板子的SDK :   GD32VF103_Firmware_Library/Examples/USART 下面的例程,并进行修改。