add & enable DISPLAY_VSENSOR_PIN if available (required for sense tft)

Author: hathach

src/boards/boards.c

@@ -250,6 +250,11 @@ void board_display_init(void) {
   //------------- Display Init -------------//
   nrf_gpio_cfg_output(DISPLAY_PIN_DC);
 
+#if defined(DISPLAY_VSENSOR_PIN) && DISPLAY_VSENSOR_PIN >= 0
+  nrf_gpio_cfg_output(DISPLAY_VSENSOR_PIN);
+  nrf_gpio_pin_write(DISPLAY_VSENSOR_PIN, DISPLAY_VSENSOR_ON);
+#endif
+
 #if defined(DISPLAY_PIN_RST) && DISPLAY_PIN_RST >= 0
   nrf_gpio_cfg_output(DISPLAY_PIN_RST);
   nrf_gpio_pin_clear(DISPLAY_PIN_RST);
@@ -771,4 +776,4 @@ static void tft_controller_init(void) {
   }
 }
 
-#endif
+#endif

src/boards/feather_nrf52840_sense_tft/board.h

@@ -50,6 +50,11 @@
 //--------------------------------------------------------------------+
 // Display
 //--------------------------------------------------------------------+
+
+// VSensor required to power the display
+#define DISPLAY_VSENSOR_PIN   _PINNUM(1, 7)
+#define DISPLAY_VSENSOR_ON    1
+
 #define DISPLAY_CONTROLLER_ST7789
 
 #define DISPLAY_PIN_SCK       _PINNUM(0, 26)