[H7] STM32H750 - Fix CPU crash on cold boot when VCP is enabled. (#8221)

[H7] STM32H750 - Fix CPU crash on cold boot when VCP is enabled.
betaflight · May 9, 2019 · a4aa237 · a4aa237
2 parents 922f927 + ad1c802
commit a4aa237
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/main/drivers/serial_usb_vcp.c b/src/main/drivers/serial_usb_vcp.c
@@ -265,9 +265,13 @@ serialPort_t *usbVcpOpen(void)
 
     /* Start Device Process */
     USBD_Start(&USBD_Device);
+
 #ifdef STM32H7
     HAL_PWREx_EnableUSBVoltageDetector();
+    delay(100); // Cold boot failures observed without this, even when USB cable is not connected
 #endif
+
+
 #else
     Set_System();
     Set_USBClock();