Added ESP32 FM DevKit - Fixed unused pins definitions. (#2288)

* Added ESP32 FM DevKit

* Added ESP32 FM DevKit variant

Fixed pin definitions for unused pins.

Author: dragon-engineer

Diff for: boards.txt

@@ -2783,3 +2783,59 @@ oroca_edubot.menu.DebugLevel.debug=Debug
 oroca_edubot.menu.DebugLevel.debug.build.code_debug=4
 oroca_edubot.menu.DebugLevel.verbose=Verbose
 oroca_edubot.menu.DebugLevel.verbose.build.code_debug=5
+
+
+
+##############################################################
+
+fm-devkit.name=ESP32 FM DevKit
+
+fm-devkit.upload.tool=esptool
+fm-devkit.upload.maximum_size=1310720
+fm-devkit.upload.maximum_data_size=327680
+fm-devkit.upload.wait_for_upload_port=true
+
+fm-devkit.serial.disableDTR=true
+fm-devkit.serial.disableRTS=true
+
+fm-devkit.build.mcu=esp32
+fm-devkit.build.core=esp32
+fm-devkit.build.variant=fm-devkit
+fm-devkit.build.board=fm-devkit
+
+fm-devkit.build.f_cpu=240000000L
+fm-devkit.build.flash_size=4MB
+fm-devkit.build.flash_freq=80m
+fm-devkit.build.flash_mode=dio
+fm-devkit.build.boot=dio
+fm-devkit.build.partitions=default
+fm-devkit.build.defines=
+
+fm-devkit.menu.UploadSpeed.921600=921600
+fm-devkit.menu.UploadSpeed.921600.upload.speed=921600
+fm-devkit.menu.UploadSpeed.115200=115200
+fm-devkit.menu.UploadSpeed.115200.upload.speed=115200
+fm-devkit.menu.UploadSpeed.256000.windows=256000
+fm-devkit.menu.UploadSpeed.256000.upload.speed=256000
+fm-devkit.menu.UploadSpeed.230400.windows.upload.speed=256000
+fm-devkit.menu.UploadSpeed.230400=230400
+fm-devkit.menu.UploadSpeed.230400.upload.speed=230400
+fm-devkit.menu.UploadSpeed.460800.linux=460800
+fm-devkit.menu.UploadSpeed.460800.macosx=460800
+fm-devkit.menu.UploadSpeed.460800.upload.speed=460800
+fm-devkit.menu.UploadSpeed.512000.windows=512000
+fm-devkit.menu.UploadSpeed.512000.upload.speed=512000
+
+fm-devkit.menu.DebugLevel.none=None
+fm-devkit.menu.DebugLevel.none.build.code_debug=0
+fm-devkit.menu.DebugLevel.error=Error
+fm-devkit.menu.DebugLevel.error.build.code_debug=1
+fm-devkit.menu.DebugLevel.warn=Warn
+fm-devkit.menu.DebugLevel.warn.build.code_debug=2
+fm-devkit.menu.DebugLevel.info=Info
+fm-devkit.menu.DebugLevel.info.build.code_debug=3
+fm-devkit.menu.DebugLevel.debug=Debug
+fm-devkit.menu.DebugLevel.debug.build.code_debug=4
+fm-devkit.menu.DebugLevel.verbose=Verbose
+fm-devkit.menu.DebugLevel.verbose.build.code_debug=5
+

Diff for: variants/fm-devkit/pins_arduino.h

@@ -0,0 +1,53 @@
+#ifndef Pins_Arduino_h
+#define Pins_Arduino_h
+
+#include <stdint.h>
+
+#define EXTERNAL_NUM_INTERRUPTS 16
+#define NUM_DIGITAL_PINS        40
+#define NUM_ANALOG_INPUTS       16
+
+#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 TX = 1;
+static const uint8_t RX = 3;
+
+// IO
+static const uint8_t LED_BUILTIN = 5;
+static const uint8_t SW1 = 4;
+static const uint8_t SW2 = 18;
+static const uint8_t SW3 = 19;
+static const uint8_t SW4 = 21;
+
+//I2S DAC
+static const uint8_t I2S_MCLK = 2;    // CLOCK must be an integer multiplier of SCLK
+static const uint8_t I2S_LRCLK = 25;  // LRCLK
+static const uint8_t I2S_SCLK = 26;   // SCLK - Fs (44100 Hz)
+static const uint8_t I2S_DOUT = 22;   // DATA
+
+//GPIO
+static const uint8_t D0 = 34; // GPI - Input Only
+static const uint8_t D1 = 35; // GPI - Input Only
+static const uint8_t D2 = 32; // GPO - Output Only
+static const uint8_t D3 = 33; // GPO - Output Only
+static const uint8_t D4 = 27;
+static const uint8_t D5 = 14;
+static const uint8_t D6 = 12;
+static const uint8_t D7 = 13;
+static const uint8_t D8 = 15;
+static const uint8_t D9 = 23;
+static const uint8_t D10 = 0;
+
+// I2C BUS, 2k2 hardware pull-ups
+static const uint8_t SDA = 16;
+static const uint8_t SCL = 17;
+
+// SPI - unused but you can create your own definition in your sketch
+static const int8_t SCK = -1;
+static const int8_t MISO = -1;
+static const int8_t MOSI = -1;
+static const int8_t SS = -1;
+
+#endif /* Pins_Arduino_h */