StackRduino
diff --git a/‎stm/stmusbd/usbd_cdc_vcp.c‎
Lines changed: 4 additions & 1 deletion b/‎stm/stmusbd/usbd_cdc_vcp.c‎
Lines changed: 4 additions & 1 deletion
diff --git a/‎stm/stmusbd/usbd_pyb_core.c‎
Lines changed: 1 addition & 1 deletion b/‎stm/stmusbd/usbd_pyb_core.c‎
Lines changed: 1 addition & 1 deletion
diff --git a/‎stm/usb.c‎
Lines changed: 5 additions & 0 deletions b/‎stm/usb.c‎
Lines changed: 5 additions & 0 deletions
diff --git a/‎stm/usb.h‎
Lines changed: 1 addition & 0 deletions b/‎stm/usb.h‎
Lines changed: 1 addition & 0 deletions
@@ -48,6 +48,9 @@ LINE_CODING linecoding =
 
 /* These are external variables imported from CDC core to be used for IN 
    transfer management. */
+
+extern uint32_t APP_dev_is_connected; // set if CDC device is connected
+
 extern uint8_t  APP_Rx_Buffer []; /* Write CDC received data in this buffer.
                                      These data will be sent over USB IN endpoint
                                      in the CDC core functions. */
@@ -158,7 +161,7 @@ static uint16_t VCP_Ctrl (uint32_t Cmd, uint8_t* Buf, uint32_t Len)
     break;
 
   case SET_CONTROL_LINE_STATE:
-    /* Not  needed for this driver */
+    APP_dev_is_connected = Len & 0x1; // wValue is passed in Len (bit of a hack)
     break;
 
   case SEND_BREAK:
 
@@ -648,7 +648,7 @@ static uint8_t usbd_pyb_Setup(void *pdev, USB_SETUP_REQ *req) {
                     // Not a Data request
 
                     // Transfer the command to the interface layer */
-                    return VCP_fops.pIf_Ctrl(req->bRequest, NULL, 0);
+                    return VCP_fops.pIf_Ctrl(req->bRequest, NULL, req->wValue);
                 }
 
             } else if (req->wIndex == 2) {
 
@@ -21,6 +21,7 @@ extern CDC_IF_Prop_TypeDef VCP_fops;
 USB_OTG_CORE_HANDLE USB_OTG_Core;
 
 static int dev_is_enabled = 0;
+uint32_t APP_dev_is_connected = 0; /* used by usbd_cdc_vcp */
 static char rx_buf[64];
 static int rx_buf_in;
 static int rx_buf_out;
@@ -48,6 +49,10 @@ bool usb_vcp_is_enabled(void) {
     return dev_is_enabled;
 }
 
+bool usb_vcp_is_connected(void) {
+    return APP_dev_is_connected;
+}
+
 void usb_vcp_set_interrupt_char(int c) {
     if (dev_is_enabled) {
         interrupt_char = c;
 
@@ -4,6 +4,7 @@
 
 void pyb_usb_dev_init(void);
 bool usb_vcp_is_enabled(void);
+bool usb_vcp_is_connected(void);
 void usb_vcp_set_interrupt_char(int c);
 int usb_vcp_rx_any(void);
 char usb_vcp_rx_get(void);
Original file line number	Diff line number	Diff line change
`@@ -648,7 +648,7 @@ static uint8_t usbd_pyb_Setup(void pdev, USB_SETUP_REQ req) {`
`648`	`648`	`// Not a Data request`
`649`	`649`
`650`	`650`	`// Transfer the command to the interface layer */`
`651`		`- return VCP_fops.pIf_Ctrl(req->bRequest, NULL, 0);`
	`651`	`+ return VCP_fops.pIf_Ctrl(req->bRequest, NULL, req->wValue);`
`652`	`652`	`}`
`653`	`653`
`654`	`654`	`} else if (req->wIndex == 2) {`