add void Adafruit_TinyUSB_Core_touch1200(void)

Author: hathach

cores/nRF5/Adafruit_TinyUSB_Core/Adafruit_TinyUSB_Core.cpp

@@ -94,6 +94,11 @@ void Adafruit_TinyUSB_Core_init(void)
   xTaskCreate( usb_device_task, "usbd", USBD_STACK_SZ, NULL, TASK_PRIO_HIGH, NULL);
 }
 
+void Adafruit_TinyUSB_Core_touch1200(void)
+{
+  enterSerialDfu();
+}
+
 uint8_t load_serial_number(uint16_t* serial_str)
 {
   // Serial is 64-bit DeviceID -> 16 chars len

cores/nRF5/Adafruit_TinyUSB_Core/Adafruit_TinyUSB_Core.h

@@ -39,4 +39,7 @@
 // Called by main.cpp to initialize usb device typically with CDC device for Serial
 void Adafruit_TinyUSB_Core_init(void);
 
+// Invoked when host disconnects cdc at baud 1200, usually touch feature to go into DFU mode
+void Adafruit_TinyUSB_Core_touch1200(void);
+
 #endif /* ADAFRUIT_TINYUSB_CORE_H_ */

cores/nRF5/Adafruit_TinyUSB_Core/Adafruit_USBD_CDC.cpp

@@ -131,7 +131,7 @@ void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts)
     cdc_line_coding_t coding;
     tud_cdc_get_line_coding(&coding);
 
-    if ( coding.bit_rate == 1200 ) enterSerialDfu();
+    if ( coding.bit_rate == 1200 ) Adafruit_TinyUSB_Core_touch1200();
   }
 }