update bcdUSB to 2.1

AT32F425/src/descriptor.c

@@ -29,7 +29,7 @@ ALIGNED_HEAD static uint8_t g_device_descriptor[USB_DEVICE_DESC_LEN] ALIGNED_TAI
 #ifdef DAP_FW_V1
 	0x00, 0x02,             			// bcdUSB
 #else
-	0x01, 0x02,             			// bcdUSB
+	0x10, 0x02,             			// bcdUSB
 #endif
 	0x00,               				// bDeviceClass
 	0x00,               				// bDeviceSubClass

AT32F425/src/hid_transfer.c

@@ -212,7 +212,6 @@ static usb_sts_type class_out_handler(void *udev, uint8_t ept_num)
 		
 		case CDC_BULK_OUT_EP:
 			Vcom.out_bytes = recv_len;
-			Vcom.out_ready = 1;
 			break;
 	}
 

AT32F425/src/vcom_serial.c

@@ -131,7 +131,7 @@ void VCOM_TransferData(void)
 
             Vcom.in_bytes = pos - last_pos;
 			
-            Vcom.in_ready = 0;
+			Vcom.in_ready = 0;
 			
 			memcpy((uint8_t *)Vcom.in_buff, &RXBuffer[last_pos], Vcom.in_bytes);
 			usbd_ept_send(&Otg.dev, CDC_BULK_IN_EP, (uint8_t *)Vcom.in_buff, Vcom.in_bytes);
@@ -154,16 +154,16 @@ void VCOM_TransferData(void)
     }
 
 	/* 从主机接收到数据，且前面的数据 DMA 已发送完 */
-    if(Vcom.out_ready && (dma_data_number_get(DMA1_CHANNEL1) == 0))
+    if(Vcom.out_bytes && (dma_data_number_get(DMA1_CHANNEL1) == 0))
     {
-        Vcom.out_ready = 0;
-		
 		memcpy(TXBuffer, (uint8_t *)Vcom.out_buff, Vcom.out_bytes);
 		
 		dma_channel_enable(DMA1_CHANNEL1, FALSE);
         dma_data_number_set(DMA1_CHANNEL1, Vcom.out_bytes);
         dma_channel_enable(DMA1_CHANNEL1, TRUE);
 		
+		Vcom.out_bytes = 0;
+
         /* Ready for next BULK OUT */
         usbd_ept_recv(&Otg.dev, CDC_BULK_OUT_EP, (uint8_t *)Vcom.out_buff, CDC_BULK_OUT_SZ);
     }

AT32F425/src/vcom_serial.h

@@ -7,11 +7,9 @@
 
 typedef struct {
 	uint8_t  rx_buff[RX_BUFF_SIZE];
-	uint16_t rx_bytes;
 	uint16_t rx_wrptr;
 	uint16_t rx_rdptr;
 	uint8_t  tx_buff[TX_BUFF_SIZE];
-	uint16_t tx_bytes;
 	uint16_t tx_wrptr;
 	uint16_t tx_rdptr;
 	
@@ -22,7 +20,6 @@ typedef struct {
 	uint16_t in_ready;
 	uint8_t  out_buff[64];
 	uint16_t out_bytes;
-	uint16_t out_ready;
 } VCOM;
 
 extern volatile VCOM Vcom;

CH32V203/src/USBUsr/usb_desc.c

@@ -17,7 +17,7 @@ const uint8_t  USBD_DeviceDescriptor[] = {
 #ifdef DAP_FW_V1
     0x00, 0x02,                         // bcdUSB
 #else
-    0x01, 0x02,                         // bcdUSB
+    0x10, 0x02,                         // bcdUSB
 #endif
     0x00,                               // bDeviceClass
     0x00,                               // bDeviceSubClass

CH32V203/src/USBUsr/usb_istr.c

@@ -214,15 +214,12 @@ void EP2_IN_Callback(void)
 
 void EP3_IN_Callback(void)
 {
-    Vcom.in_ready = 1;
 }
 
 
 void EP3_OUT_Callback(void)
 {
     Vcom.out_bytes = USB_SIL_Read(EP3_OUT, (uint8_t *)Vcom.out_buff);
-
-    Vcom.out_ready = 1;
 }
 
 

CH32V203/src/USBUsr/usb_prop.c

@@ -259,8 +259,6 @@ void USBD_Reset(void)
     SetDeviceAddress(0);
 
     bDeviceState = ATTACHED;
-
-    Vcom.in_ready = 1;
 }
 
 /*********************************************************************

CH32V203/src/vcom_serial.c

@@ -127,7 +127,7 @@ void VCOM_TransferData(void)
     static uint32_t last_ms = 0;
     static uint32_t last_pos = 0;
 
-    if(Vcom.in_ready)		// 可以向主机发送数据
+    if(GetEPTxStatus(ENDP3) == EP_TX_NAK)   // 可以向主机发送数据
     {
         uint32_t pos = RXDMA_SZ - DMA_GetCurrDataCounter(DMA1_Channel6);
         if((pos - last_pos >= CDC_BULK_IN_SZ) || ((pos != last_pos) && (SysTick_ms != last_ms)))
@@ -140,8 +140,6 @@ void VCOM_TransferData(void)
 
             Vcom.in_bytes = pos - last_pos;
 
-            Vcom.in_ready = 0;
-
             USB_SIL_Write(EP3_IN, &RXBuffer[last_pos], Vcom.in_bytes);
             SetEPTxValid(ENDP3);
 
@@ -164,16 +162,16 @@ void VCOM_TransferData(void)
     }
 
 	/* 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))
+    if(Vcom.out_bytes && (DMA_GetCurrDataCounter(DMA1_Channel7) == 0))
     {
-        Vcom.out_ready = 0;
-
         memcpy(TXBuffer, (uint8_t *)Vcom.out_buff, Vcom.out_bytes);
 
         DMA_Cmd(DMA1_Channel7, DISABLE);
         DMA_SetCurrDataCounter(DMA1_Channel7, Vcom.out_bytes);
         DMA_Cmd(DMA1_Channel7, ENABLE);
 
+        Vcom.out_bytes = 0;
+
         /* Ready for next BULK OUT */
 		SetEPRxValid(ENDP3);
     }

CH32V203/src/vcom_serial.h

@@ -7,11 +7,9 @@
 
 typedef struct {
 	uint8_t  rx_buff[RX_BUFF_SIZE];
-	uint16_t rx_bytes;
 	uint16_t rx_wrptr;
 	uint16_t rx_rdptr;
 	uint8_t  tx_buff[TX_BUFF_SIZE];
-	uint16_t tx_bytes;
 	uint16_t tx_wrptr;
 	uint16_t tx_rdptr;
 	
@@ -19,10 +17,8 @@ typedef struct {
 	
 	uint8_t  in_buff[64];
 	uint16_t in_bytes;
-	uint16_t in_ready;
 	uint8_t  out_buff[64];
 	uint16_t out_bytes;
-	uint16_t out_ready;
 } VCOM;
 
 extern volatile VCOM Vcom;

CH32V305/src/USBD/ch32v30x_usbhs_device.c

@@ -102,8 +102,6 @@ void USBHS_Device_Endp_Init(void)
     USBHSD->UEP3_TX_LEN  = 0;
     USBHSD->UEP3_TX_CTRL = USBHS_UEP_T_RES_NAK;
     USBHSD->UEP3_RX_CTRL = USBHS_UEP_R_RES_ACK;
-
-    Vcom.in_ready = 1;
 }
 
 
@@ -258,6 +256,11 @@ void USBHS_IRQHandler( void )
                         len          = USB_StringSerialNbr[0];
                         break;
 
+                    case 4:
+                        pUSBHS_Descr = USB_StringInterface;
+                        len          = USB_StringInterface[0];
+                        break;
+
                     default:
                         error = 0xFF;
                         break;
@@ -269,9 +272,12 @@ void USBHS_IRQHandler( void )
                     len          = USB_QualifierDesc[0];
                     break;
 
+#ifndef DAP_FW_V1
                 case USB_DESCR_TYP_BOS:
-                    error = 0xFF;
+                    pUSBHS_Descr = BOS_Descriptor;
+                    len          = BOS_Descriptor[0] + BOS_Descriptor[5];
                     break;
+#endif
 
                 default :
                     error = 0xFF;
@@ -433,16 +439,7 @@ void USBHS_IRQHandler( void )
                     break;
 
                 case HID_GET_REPORT:
-                    if(USBHS_DevSpeed == USBHS_USB_SPEED_HIGH)
+                    error = 0xFF;
-                    {
-                        len = (USBHS_Setup.wLength >= USB_MAX_EP0_SZ) ? USB_MAX_EP0_SZ : USBHS_Setup.wLength;
-                        memcpy(USBHS_EP0_Buf, HID_ReportDesc_HS, len);
-                    }
-                    else
-                    {
-                        len = (USBHS_Setup.wLength >= USB_MAX_EP0_SZ) ? USB_MAX_EP0_SZ : USBHS_Setup.wLength;
-                        memcpy(USBHS_EP0_Buf, HID_ReportDesc_FS, len);
-                    }
                     break;
 
                 case HID_SET_IDLE:
@@ -451,7 +448,6 @@ void USBHS_IRQHandler( void )
 
                 case HID_GET_IDLE:
                     USBHS_EP0_Buf[0] = USBHS_HID_Idle;
-                    len = 1;
                     break;
 
                 case HID_SET_PROTOCOL:
@@ -460,15 +456,13 @@ void USBHS_IRQHandler( void )
 
                 case HID_GET_PROTOCOL:
                     USBHS_EP0_Buf[0] = USBHS_HID_Protocol;
-                    len = 1;
                     break;
 
                 case CDC_SET_LINE_CODING:
                     break;
 
                 case CDC_GET_LINE_CODING:
-                    pUSBHS_Descr = (uint8_t *)&LineCfg;
+                    memcpy(USBHS_EP0_Buf, (uint8_t *)&LineCfg, 7);
-                    len = 7;
                     break;
 
                 case CDC_SET_LINE_CTLSTE:
@@ -481,17 +475,27 @@ void USBHS_IRQHandler( void )
             }
             else if(USBHS_Setup.bRequestType & USB_REQ_TYP_VENDOR)
             {
-                error = 0xFF;
+                if((USBHS_Setup.bRequest == WINUSB_VENDOR_CODE) && (USBHS_Setup.wIndex == 7))
+                {
+                    pUSBHS_Descr = MS_OS_20_DescriptorSet;
+                    len          = MS_OS_20_DescriptorSet[8];
+
+                    /* Copy Descriptors to Endp0 DMA buffer */
+                    if(USBHS_Setup.wLength > len)
+                    {
+                        USBHS_Setup.wLength = len;
+                    }
+                    len = (USBHS_Setup.wLength >= USB_MAX_EP0_SZ) ? USB_MAX_EP0_SZ : USBHS_Setup.wLength;
+                    memcpy(USBHS_EP0_Buf, pUSBHS_Descr, len);
+                    pUSBHS_Descr += len;
+                }
+                else
+                    error = 0xFF;
             }
             else
             {
                 error = 0xFF;
             }
-
-            /* Copy Descriptors to Endp0 DMA buffer */
-            len = (USBHS_Setup.wLength >= USB_MAX_EP0_SZ) ? USB_MAX_EP0_SZ : USBHS_Setup.wLength;
-            memcpy(USBHS_EP0_Buf, pUSBHS_Descr, len);
-            pUSBHS_Descr += len;
         }
 
         if(error == 0xFF)
@@ -505,8 +509,8 @@ void USBHS_IRQHandler( void )
             if(USBHS_Setup.bRequestType & USB_EPT_IN)
             {
                 len = (USBHS_Setup.wLength > USB_MAX_EP0_SZ) ? USB_MAX_EP0_SZ : USBHS_Setup.wLength;
-
                 USBHS_Setup.wLength -= len;
+
                 USBHSD->UEP0_TX_LEN = len;
                 USBHSD->UEP0_TX_CTRL = USBHS_UEP_T_TOG_DATA1 | USBHS_UEP_T_RES_ACK;
             }
@@ -564,6 +568,16 @@ void USBHS_IRQHandler( void )
                         break;
                     }
                 }
+                else if((USBHS_Setup.bRequestType & USB_REQ_TYP_MASK) == USB_REQ_TYP_VENDOR)
+                {
+                    len = USBHS_Setup.wLength >= USB_MAX_EP0_SZ ? USB_MAX_EP0_SZ : USBHS_Setup.wLength;
+                    memcpy(USBHS_EP0_Buf, pUSBHS_Descr, len);
+                    USBHS_Setup.wLength -= len;
+                    pUSBHS_Descr += len;
+
+                    USBHSD->UEP0_TX_LEN = len;
+                    USBHSD->UEP0_TX_CTRL ^= USBHS_UEP_T_TOG_DATA1;
+                }
                 else
                 {
                     /* Non-standard request endpoint 0 Data upload */
@@ -585,8 +599,6 @@ void USBHS_IRQHandler( void )
             case CDC_BULK_IN_EP & 0x0F:
                 USBHSD->UEP3_TX_CTRL = (USBHSD->UEP3_TX_CTRL & ~USBHS_UEP_T_RES_MASK) | USBHS_UEP_T_RES_NAK;
                 USBHSD->UEP3_TX_CTRL ^= USBHS_UEP_T_TOG_DATA1;
-
-                Vcom.in_ready = 1;
                 break;
 
             default:
@@ -617,10 +629,6 @@ void USBHS_IRQHandler( void )
 
                              VCOM_LineCoding(&LineCfg);
                          }
-                         else if(USBHS_Setup.bRequest == HID_SET_REPORT)
-                         {
-                             error = 0xFF;
-                         }
                      }
 
                      if(USBHS_Setup.wLength == 0)
@@ -645,7 +653,6 @@ void USBHS_IRQHandler( void )
                 USBHSD->UEP3_RX_CTRL = (USBHSD->UEP3_RX_CTRL & ~USBHS_UEP_R_RES_MASK) | USBHS_UEP_R_RES_NAK;
 
                 Vcom.out_bytes = len;
-                Vcom.out_ready = 1;
                 break;
 
             default:

CH32V305/src/USBD/usb_desc.c

@@ -55,7 +55,7 @@ const uint8_t USB_DevDesc[] =
 #ifdef DAP_FW_V1
     0x00, 0x02,                         // bcdUSB
 #else
-    0x01, 0x02,                         // bcdUSB
+    0x10, 0x02,                         // bcdUSB
 #endif
     0x00,                               // bDeviceClass
     0x00,                               // bDeviceSubClass
@@ -97,7 +97,7 @@ const uint8_t USB_CfgDesc_FS[] =
 #endif
     0x00,                               // bInterfaceSubClass
     0x00,                               // bInterfaceProtocol
-    0x00,                               // iInterface
+    0x04,                               // iInterface
 
 #ifdef DAP_FW_V1
     // HID Descriptor
@@ -246,7 +246,7 @@ const uint8_t USB_CfgDesc_HS[] =
 #endif
     0x00,                               // bInterfaceSubClass
     0x00,                               // bInterfaceProtocol
-    0x00,                               // iInterface
+    0x04,                               // iInterface
 
 #ifdef DAP_FW_V1
     // HID Descriptor
@@ -410,6 +410,15 @@ uint8_t USB_StringSerialNbr[] =
 };
 
 
+/* Interface Descriptor */
+const uint8_t USB_StringInterface[] =
+{
+    USB_SIZE_STRING_PRODUCT,
+    USB_DESCR_TYP_STRING,
+    'X', 0, 'V', 0, '-', 0, 'L', 0, 'i', 0, 'n', 0, 'k', 0, ' ', 0, 'C', 0, 'M', 0, 'S', 0, 'I', 0, 'S', 0, '-', 0, 'D', 0, 'A', 0, 'P', 0
+};
+
+
 /* Device Qualified Descriptor */
 const uint8_t USB_QualifierDesc[] =
 {
@@ -423,3 +432,75 @@ const uint8_t USB_QualifierDesc[] =
     0x01,                       // bNumConfigurations
     0x00,                       // bReserved
 };
+
+
+
+
+const uint8_t BOS_Descriptor[] =
+{
+    5,
+    USB_DESCR_TYP_BOS,
+    5+20+8, 0,                  // wTotalLength
+    1,                          // bNumDeviceCaps
+
+    /*** MS OS 2.0 descriptor platform capability descriptor ***/
+    28,
+    DESC_CAPABILITY,
+    5,                          // bDevCapabilityType: PLATFORM (05H)
+    0x00,
+    0xDF, 0x60, 0xDD, 0xD8,     // PlatformCapabilityUUID: MS_OS_20_Platform_Capability_ID (D8DD60DF-4589-4CC7-9CD2-659D9E648A9F)
+    0x89, 0x45, 0xC7, 0x4C,
+    0x9C, 0xD2, 0x65, 0x9D,
+    0x9E, 0x64, 0x8A, 0x9F,
+
+    0x00, 0x00, 0x03, 0x06,     // dwWindowsVersion: 0x06030000 for Windows 8.1
+    10+8+20+128, 0x00,          // wTotalLength: size of MS OS 2.0 descriptor set
+    WINUSB_VENDOR_CODE,         // bMS_VendorCode
+    0x00,                       // bAltEnumCmd
+};
+
+
+#define MS_OS_20_SET_HEADER_DESCRIPTOR        0x00
+#define MS_OS_20_SUBSET_HEADER_CONFIGURATION  0x01
+#define MS_OS_20_SUBSET_HEADER_FUNCTION       0x02
+#define MS_OS_20_FEATURE_COMPATIBLE_ID        0x03
+#define MS_OS_20_FEATURE_REG_PROPERTY         0x04
+#define MS_OS_20_FEATURE_MIN_RESUME_TIME      0x05
+#define MS_OS_20_FEATURE_MODEL_ID             0x06
+#define MS_OS_20_FEATURE_CCGP_DEVICE          0x07
+#define MS_OS_20_FEATURE_VENDOR_REVISION      0x08
+
+const uint8_t MS_OS_20_DescriptorSet[] =
+{
+    /*** Microsoft OS 2.0 Descriptor Set Header ***/
+    10, 0,
+    MS_OS_20_SET_HEADER_DESCRIPTOR, 0,
+    0x00, 0x00, 0x03, 0x06,     // dwWindowsVersion: 0x06030000 for Windows 8.1
+    10+8+20+128, 0,             // wTotalLength
+
+    /*** Microsoft OS 2.0 function subset header ***/
+    8, 0,
+    MS_OS_20_SUBSET_HEADER_FUNCTION, 0,
+    0,                          // bFirstInterface, first interface to which this subset applies
+    0,
+    8+20+128, 0,                // wSubsetLength
+
+    /*** Microsoft OS 2.0 compatible ID descriptor ***/
+    20, 0,
+    MS_OS_20_FEATURE_COMPATIBLE_ID, 0,
+    'W',  'I',  'N',  'U',  'S',  'B',  0x00, 0x00,     // CompatibleID
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // SubCompatibleID
+
+    /*** MS OS 2.0 registry property descriptor ***/
+    128, 0,
+    MS_OS_20_FEATURE_REG_PROPERTY, 0,
+    1, 0,                       // wPropertyDataType: 1 = Unicode REG_SZ
+    40, 0x00,                   // wPropertyNameLength
+    'D', 0, 'e', 0, 'v', 0, 'i', 0, 'c', 0, 'e', 0, 'I', 0, 'n', 0, 't', 0, 'e', 0,
+    'r', 0, 'f', 0, 'a', 0, 'c', 0, 'e', 0, 'G', 0, 'U', 0, 'I', 0, 'D', 0,   0, 0,     // PropertyName: "DeviceInterfaceGUID"
+    78, 0x00,                   // wPropertyDataLength
+    '{', 0, 'C', 0, 'D', 0, 'B', 0, '3', 0, 'B', 0, '5', 0, 'A', 0, 'D', 0, '-', 0,
+    '2', 0, '9', 0, '3', 0, 'B', 0, '-', 0, '4', 0, '6', 0, '6', 0, '3', 0, '-', 0,
+    'A', 0, 'A', 0, '3', 0, '6', 0, '-', 0, '1', 0, 'A', 0, 'A', 0, 'E', 0, '4', 0,
+    '6', 0, '4', 0, '6', 0, '3', 0, '7', 0, '7', 0, '6', 0, '}', 0,   0, 0,             // PropertyData: "{CDB3B5AD-293B-4663-AA36-1AAE46463776}"
+};

CH32V305/src/USBD/usb_desc.h

@@ -63,9 +63,17 @@ extern const uint8_t USB_StringLangID[];
 extern const uint8_t USB_StringVendor[];
 extern const uint8_t USB_StringProduct[];
 extern       uint8_t USB_StringSerialNbr[];
+extern const uint8_t USB_StringInterface[];
 extern const uint8_t USB_QualifierDesc[];
 extern const uint8_t HID_ReportDesc_FS[];
 extern const uint8_t HID_ReportDesc_HS[];
+extern const uint8_t BOS_Descriptor[];
+extern const uint8_t MS_OS_20_DescriptorSet[];
+
+
+#define DESC_CAPABILITY     0x10
+
+#define WINUSB_VENDOR_CODE  0x34
 
 
 #endif // __USB_DESC_H__

CH32V305/src/main.c

@@ -7,6 +7,12 @@
 #include "hid_transfer.h"
 
 
+/* 在 Properties for DAPLink -> C/C++ Build -> Settings -> C Compiler -> Preprocessor 中：
+   定义 DAP_FW_V1：   生成 CMSIS-DAP v1 固件，使用 HID 传输协议
+   不定义 DAP_FW_V1： 生成 CMSIS-DAP v2 固件，使用 WINUSB 传输协议
+*/
+
+
 volatile uint32_t SysTick_ms = 0;
 
 

CH32V305/src/vcom_serial.c

@@ -128,7 +128,7 @@ void VCOM_TransferData(void)
     static uint32_t last_ms = 0;
     static uint32_t last_pos = 0;
 
-    if(Vcom.in_ready)		// 可以向主机发送数据
+    if((USBHSD->UEP3_TX_CTRL & USBHS_UEP_T_RES_MASK) == USBHS_UEP_T_RES_NAK)    // 可以向主机发送数据
     {
         uint32_t pos = RXDMA_SZ - DMA_GetCurrDataCounter(DMA1_Channel3);
         if((pos - last_pos >= CDC_BULK_IN_SZ_HS) || ((pos != last_pos) && (SysTick_ms != last_ms)))
@@ -141,8 +141,6 @@ void VCOM_TransferData(void)
 
             Vcom.in_bytes = pos - last_pos;
 
-            Vcom.in_ready = 0;
-
             USBHSD->UEP3_TX_DMA = (uint32_t)&RXBuffer[last_pos];
             USBHSD->UEP3_TX_LEN = Vcom.in_bytes;
             USBHSD->UEP3_TX_CTRL = (USBHSD->UEP3_TX_CTRL & ~USBHS_UEP_T_RES_MASK) | USBHS_UEP_T_RES_ACK;
@@ -167,16 +165,16 @@ void VCOM_TransferData(void)
 
 xfer_out:
 	/* 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_Channel2) == 0))
+    if(Vcom.out_bytes && (DMA_GetCurrDataCounter(DMA1_Channel2) == 0))
     {
-        Vcom.out_ready = 0;
-
         memcpy(TXBuffer, USBHS_EP3_Rx_Buf, Vcom.out_bytes);
 
         DMA_Cmd(DMA1_Channel2, DISABLE);
         DMA_SetCurrDataCounter(DMA1_Channel2, Vcom.out_bytes);
         DMA_Cmd(DMA1_Channel2, ENABLE);
 
+        Vcom.out_bytes = 0;
+
         /* Ready for next BULK OUT */
         USBHSD->UEP3_RX_CTRL = (USBHSD->UEP3_RX_CTRL & ~USBHS_UEP_R_RES_MASK) | USBHS_UEP_R_RES_ACK;
     }

CH32V305/src/vcom_serial.h

@@ -7,11 +7,9 @@
 
 typedef struct {
 	uint8_t  rx_buff[RX_BUFF_SIZE];
-	uint16_t rx_bytes;
 	uint16_t rx_wrptr;
 	uint16_t rx_rdptr;
 	uint8_t  tx_buff[TX_BUFF_SIZE];
-	uint16_t tx_bytes;
 	uint16_t tx_wrptr;
 	uint16_t tx_rdptr;
 	
@@ -19,10 +17,8 @@ typedef struct {
 	
 	uint8_t  in_buff[512];
 	uint16_t in_bytes;
-	uint16_t in_ready;
 	uint8_t  out_buff[512];
 	uint16_t out_bytes;
-	uint16_t out_ready;
 } VCOM;
 
 extern volatile VCOM Vcom;

README.md

@@ -44,6 +44,10 @@ Sch & PCB: [https://oshwhub.com/xivn1987/daplink](https://oshwhub.com/xivn1987/d
 ## DAPLink-CH32V305
 DAPLink (CMSIS-DAP) based on WCH CH32V305 (High Speed USB with on-chip PHY), supports SWD, JTAG and CDC.
 
+On Properties for DAPLink -> C/C++ Build -> Settings -> C Compiler -> Preprocessor page:
+* Define `DAP_FW_V1`: generate CMSIS-DAP V1 firmware, using HID transport protocol.
+* Do not define `DAP_FW_V1`: generate CMSIS-DAP V2 firmware, using WINUSB transfer protocol.
+
 ### Pin map
 |  FUNC    | Pin   |
 |  :----   | :---- |
@@ -72,3 +76,4 @@ pyocd flash -t stm32f411ce -f 5mhz random_512k.bin
 | CH32V203 HID    | Erased 524288 bytes (8 sectors), programmed 524288 bytes (512 pages), skipped 0 bytes (0 pages) at 17.26 kB/s |
 | CH32V203 WINUSB | Erased 524288 bytes (8 sectors), programmed 524288 bytes (512 pages), skipped 0 bytes (0 pages) at 38.16 kB/s |
 | CH32V305 HID    | Erased 524288 bytes (8 sectors), programmed 524288 bytes (512 pages), skipped 0 bytes (0 pages) at 35.44 kB/s |
+| CH32V305 WINUSB | Erased 524288 bytes (8 sectors), programmed 524288 bytes (512 pages), skipped 0 bytes (0 pages) at 39.40 kB/s |