prevent UART TX Buffer writing by USB OUT packet when UART TXing.

CH32V305/src/USBD/ch32v30x_usbhs_device.c

@@ -644,8 +644,6 @@ void USBHS_IRQHandler( void )
                 USBHSD->UEP3_RX_CTRL ^= USBHS_UEP_R_TOG_DATA1;
                 USBHSD->UEP3_RX_CTRL = (USBHSD->UEP3_RX_CTRL & ~USBHS_UEP_R_RES_MASK) | USBHS_UEP_R_RES_NAK;
 
-                extern uint8_t TXBuffer[];
-                memcpy(TXBuffer, USBHS_EP3_Rx_Buf, len);
                 Vcom.out_bytes = len;
                 Vcom.out_ready = 1;
                 break;

CH32V305/src/vcom_serial.c

@@ -109,15 +109,6 @@ void VCOM_LineCoding(VCOM_LINE_CODING * LineCfgx)
 
     __disable_irq();
     
-    // Reset software FIFO
-    Vcom.rx_bytes = 0;
-	Vcom.rx_wrptr = 0;
-    Vcom.rx_rdptr = 0;
-
-    Vcom.tx_bytes = 0;
-	Vcom.tx_wrptr = 0;
-    Vcom.tx_rdptr = 0;
-    
     USART_Init(USART2, &USART_InitStructure);
     
     RX_Timeout = (1000.0 / USART_InitStructure.USART_BaudRate) * (512 * 10) * 1.5;
@@ -201,11 +192,13 @@ void VCOM_TransferData(void)
     }
 
 xfer_out:
-	/* 从主机接收到数据，且 tx_buff 能够装下它们 */
+	/* 从主机接收到数据，且前面的数据 DMA 已发送完 */
     if(Vcom.out_ready && (DMA_GetCurrDataCounter(DMA1_Channel7) == 0))
     {
         Vcom.out_ready = 0;
 
+        memcpy(TXBuffer, USBHS_EP3_Rx_Buf, Vcom.out_bytes);
+
         DMA_Cmd(DMA1_Channel7, DISABLE);
         DMA_SetCurrDataCounter(DMA1_Channel7, Vcom.out_bytes);
         DMA_Cmd(DMA1_Channel7, ENABLE);

CH32V305/src/vcom_serial.h

@@ -17,10 +17,10 @@ typedef struct {
 	
 	uint16_t hw_flow;			// BIT0: DTR(Data Terminal Ready) , BIT1: RTS(Request To Send)
 	
-	uint8_t  in_buff[64];
+	uint8_t  in_buff[512];
 	uint16_t in_bytes;
 	uint16_t in_ready;
-	uint8_t  out_buff[64];
+	uint8_t  out_buff[512];
 	uint16_t out_bytes;
 	uint16_t out_ready;
 } VCOM;