add api for supplementary tasks, add button task

lib/hardware/GwHardware.h

@@ -0,0 +1,48 @@
+/*
+  This code is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+  This code is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+#ifndef _GWHARDWARE_H
+#define _GWHARDWARE_H
+
+//SERIAL_MODE can be: UNI (RX or TX only), BI (both), RX, TX
+//board specific pins
+#ifdef BOARD_M5ATOM
+#define ESP32_CAN_TX_PIN GPIO_NUM_22
+#define ESP32_CAN_RX_PIN GPIO_NUM_19
+//if using tail485
+#define GWSERIAL_TX 26
+#define GWSERIAL_RX 32
+#define GWSERIAL_MODE "UNI"
+#elif BOARD_M5ATOM_CANUNIT
+#define ESP32_CAN_TX_PIN GPIO_NUM_26
+#define ESP32_CAN_RX_PIN GPIO_NUM_32
+#elif BOARD_M5STICK_CANUNIT
+#define ESP32_CAN_TX_PIN GPIO_NUM_32
+#define ESP32_CAN_RX_PIN GPIO_NUM_33
+#elif BOARD_HOMBERGER
+#define ESP32_CAN_TX_PIN GPIO_NUM_5
+#define ESP32_CAN_RX_PIN GPIO_NUM_4
+//serial input only
+#define GWSERIAL_RX 16
+#define GWSERIAL_MODE "RX"
+
+#define GWBUTTON_PIN GPIO_NUM_0
+#define GWBUTTON_ACTIVE LOW
+//if GWBUTTON_PULLUPDOWN we enable a pulup/pulldown
+#define GWBUTTON_PULLUPDOWN 
+
+#else
+
+#endif
+
+#endif