add support for widora-air board (espressif#367)

* add support for widora-air board

* change widora-air f_cpu error,from 400M to 240M

Author: mangobuge

boards.txt

@@ -99,6 +99,47 @@ esp32thing.menu.UploadSpeed.512000.upload.speed=512000
 
 ##############################################################
 
+widora-air.name=Widora AIR
+
+widora-air.upload.tool=esptool
+widora-air.upload.maximum_size=1044464
+widora-air.upload.maximum_data_size=294912
+widora-air.upload.wait_for_upload_port=true
+
+widora-air.serial.disableDTR=true
+widora-air.serial.disableRTS=true
+
+widora-air.build.mcu=esp32
+widora-air.build.core=esp32
+widora-air.build.variant=widora-air
+widora-air.build.board=WIDORA_AIR
+
+widora-air.build.f_cpu=240000000L
+widora-air.build.flash_mode=dio
+widora-air.build.flash_size=16MB
+
+widora-air.menu.FlashFreq.80=80MHz
+widora-air.menu.FlashFreq.80.build.flash_freq=80m
+widora-air.menu.FlashFreq.40=40MHz
+widora-air.menu.FlashFreq.40.build.flash_freq=40m
+
+widora-air.menu.UploadSpeed.921600=921600
+widora-air.menu.UploadSpeed.921600.upload.speed=921600
+widora-air.menu.UploadSpeed.115200=115200
+widora-air.menu.UploadSpeed.115200.upload.speed=115200
+widora-air.menu.UploadSpeed.256000.windows=256000
+widora-air.menu.UploadSpeed.256000.upload.speed=256000
+widora-air.menu.UploadSpeed.230400.windows.upload.speed=256000
+widora-air.menu.UploadSpeed.230400=230400
+widora-air.menu.UploadSpeed.230400.upload.speed=230400
+widora-air.menu.UploadSpeed.460800.linux=460800
+widora-air.menu.UploadSpeed.460800.macosx=460800
+widora-air.menu.UploadSpeed.460800.upload.speed=460800
+widora-air.menu.UploadSpeed.512000.windows=512000
+widora-air.menu.UploadSpeed.512000.upload.speed=512000
+
+##############################################################
+
 esp320.name=Electronic SweetPeas - ESP320
 
 esp320.upload.tool=esptool
@@ -587,4 +628,4 @@ featheresp32.menu.UploadSpeed.460800.upload.speed=460800
 featheresp32.menu.UploadSpeed.512000.windows=512000
 featheresp32.menu.UploadSpeed.512000.upload.speed=512000
 
-##############################################################
+##############################################################

variants/widora-air/pins_arduino.h

@@ -0,0 +1,61 @@
+#ifndef Pins_Arduino_h
+#define Pins_Arduino_h
+
+#include <stdint.h>
+
+#define EXTERNAL_NUM_INTERRUPTS 16
+#define NUM_DIGITAL_PINS        7
+#define NUM_ANALOG_INPUTS       10
+
+#define analogInputToDigitalPin(p)  (((p)<20)?(esp32_adc2gpio[(p)]):-1)
+#define digitalPinToInterrupt(p)    (((p)<40)?(p):-1)
+#define digitalPinHasPWM(p)         (p < 34)
+
+static const uint8_t LED_BUILTIN = 25;
+#define BUILTIN_LED  LED_BUILTIN // backward compatibility
+
+
+static const uint8_t KEY_BUILTIN = 0;
+
+static const uint8_t TX = 1;
+static const uint8_t RX = 3;
+
+static const uint8_t SDA = 23;
+static const uint8_t SCL = 19;
+
+static const uint8_t SS    = 5;
+static const uint8_t MOSI  = 16;
+static const uint8_t MISO  = 17;
+static const uint8_t SCK   = 18;
+
+static const uint8_t A0 = 36;
+static const uint8_t A1 = 39;
+static const uint8_t A2 = 35;
+static const uint8_t A3 = 25;
+static const uint8_t A4 = 26;
+static const uint8_t A5 = 14;
+static const uint8_t A6 = 12;
+static const uint8_t A7 = 15;
+static const uint8_t A8 = 13;
+static const uint8_t A9 = 2;
+
+static const uint8_t D0 = 19;
+static const uint8_t D1 = 23;
+static const uint8_t D2 = 18;
+static const uint8_t D3 = 17;
+static const uint8_t D4 = 16;
+static const uint8_t D5 = 5;
+static const uint8_t D6 = 4;
+
+static const uint8_t T0 = 19;
+static const uint8_t T1 = 23;
+static const uint8_t T2 = 18;
+static const uint8_t T3 = 17;
+static const uint8_t T4 = 16;
+static const uint8_t T5 = 5;
+static const uint8_t T6 = 4;
+
+static const uint8_t DAC1 = 25;
+static const uint8_t DAC2 = 26;
+
+#endif /* Pins_Arduino_h */