Support for reset chip on canary

src/boards/boards.h

@@ -61,6 +61,11 @@
 #define BOARD_RGB_BRIGHTNESS 0x101010
 #endif
 
+// Rest chip support for devices with a battery and no dedicated reset button
+#ifndef RESET_CHIP
+#define RESET_CHIP 0
+#endif
+
 // Power configuration - should we enable DC/DC converters? (requires inductors on board)
 #ifndef ENABLE_DCDC_0
 #define ENABLE_DCDC_0 0

src/boards/canary/board.h

@@ -43,6 +43,7 @@
 #define BUTTON_1       _PINNUM(0, 16)
 #define BUTTON_2       _PINNUM(0, 15)
 #define BUTTON_PULL    NRF_GPIO_PIN_PULLUP
+#define RESET_CHIP     1
 
 //--------------------------------------------------------------------+
 // BLE OTA

src/main.c

@@ -258,11 +258,30 @@ static void check_dfu_mode(void)
   if (dfu_skip) return;
 
   /*------------- Determine DFU mode (Serial, OTA, FRESET or normal) -------------*/
+
+#ifdef RESET_CHIP  
+  // If both buttons are pressed --> skip dfu
+  // This is for boards that have no reset button
+  // but pressing both buttons will reset the chip
+  // after 10 seconds
+
+  // Wait 3 seconds before reading button state to allow user to release the buttons
+  NRFX_DELAY_MS(3000); 
+
+  bool const reset_only = ( button_pressed(BUTTON_DFU) && button_pressed(BUTTON_FRESET) ) ;
+  if (reset_only) return;
+
+  // DFU button pressed
+  dfu_start = dfu_start || button_pressed(BUTTON_DFU);
+  _ota_dfu = _ota_dfu || button_pressed(BUTTON_FRESET);
+  if (_ota_dfu) dfu_start = true;
+#else
   // DFU button pressed
   dfu_start = dfu_start || button_pressed(BUTTON_DFU);
 
   // DFU + FRESET are pressed --> OTA
   _ota_dfu = _ota_dfu  || ( button_pressed(BUTTON_DFU) && button_pressed(BUTTON_FRESET) ) ;
+#endif
 
   bool const valid_app = bootloader_app_is_valid();
   bool const just_start_app = valid_app && !dfu_start && (*dbl_reset_mem) == DFU_DBL_RESET_APP;