Adjust _rx_in_progress=true in USBCDC.cpp for USB DMA auto-receive chip

cyliangtw · cyliangtw · commit c3f518c08560 · 2019-12-30T13:41:16.000+08:00
diff --git a/drivers/source/usb/USBCDC.cpp b/drivers/source/usb/USBCDC.cpp
@@ -464,8 +464,8 @@ void USBCDC::_receive_isr_start()
 {
     if ((_rx_size == 0) && !_rx_in_progress) {
         // Refill the buffer
-        read_start(_bulk_out, _rx_buffer, sizeof(_rx_buffer));
         _rx_in_progress = true;
+        read_start(_bulk_out, _rx_buffer, sizeof(_rx_buffer));
     }
 }
 

Original file line number	Diff line number	Diff line change
`@@ -464,8 +464,8 @@ void USBCDC::_receive_isr_start()`
`464`	`464`	`{`
`465`	`465`	`if ((_rx_size == 0) && !_rx_in_progress) {`
`466`	`466`	`// Refill the buffer`
`467`		`- read_start(_bulk_out, _rx_buffer, sizeof(_rx_buffer));`
`468`	`467`	`_rx_in_progress = true;`
	`468`	`+ read_start(_bulk_out, _rx_buffer, sizeof(_rx_buffer));`
`469`	`469`	`}`
`470`	`470`	`}`
`471`	`471`