我直接改官方例程主函数如下，串口调试助手能收到数据，但是会有大量的数据丢失，- while (1)
- {
-
- count_in = 64;
- UserToPMABufferCopy(buffer_in, ENDP1_TXADDR, count_in);
- SetEPTxCount(ENDP1, count_in);
- SetEPTxValid(ENDP1);
- }
- int main(void)
- {
- Set_System();
- Set_USBClock();
- USB_Interrupts_Config();
- USB_Init();
- while (1)
- {
- while(count_in);
- count_in = 64;
- UserToPMABufferCopy(buffer_in, ENDP1_TXADDR, count_in);
- SetEPTxCount(ENDP1, count_in);
- SetEPTxValid(ENDP1);
- }
- }
| 
楼主
