Add ATMegaZero ESP32-S2 microcontroller (#5569)

## Summary
Adds support for the new ATMegaZero ESP32-S2 board. Adds the relevant section to `boards.txt` and adds the folder for the `atmegazero-esp32s2` with the proper `pins_arduino.h` to the `variants` folder.

## Impact
Allows users to compile code properly for the ATMegaZero ESP32-S2 without having to use a similar board and manually entering pin numbers.

## Links
[ATMegaZero ESP32-S2](https://atmegazero.com/#/atmegazero_esp32s2_overview)

Thanks!

boards.txt

@@ -9206,6 +9206,154 @@ esp32-trueverit-iot-driver-mkii.menu.DebugLevel.verbose.build.code_debug=5
 
 ##############################################################
 
+atmegazero_esp32s2.name=ATMegaZero ESP32-S2
+atmegazero_esp32s2.vid.0=0x239A
+atmegazero_esp32s2.pid.0=0x800A
+
+atmegazero_esp32s2.upload.tool=esptool_py
+atmegazero_esp32s2.upload.maximum_size=1310720
+atmegazero_esp32s2.upload.maximum_data_size=327680
+atmegazero_esp32s2.upload.flags=
+atmegazero_esp32s2.upload.extra_flags=0x2d0000 "{runtime.platform.path}/variants/{build.variant}/tinyuf2.bin"
+atmegazero_esp32s2.upload.use_1200bps_touch=true
+atmegazero_esp32s2.upload.wait_for_upload_port=true
+
+atmegazero_esp32s2.serial.disableDTR=false
+atmegazero_esp32s2.serial.disableRTS=false
+
+atmegazero_esp32s2.build.tarch=xtensa
+atmegazero_esp32s2.build.bootloader_addr=0x1000
+atmegazero_esp32s2.build.target=esp32s2
+atmegazero_esp32s2.build.mcu=esp32s2
+atmegazero_esp32s2.build.core=esp32
+atmegazero_esp32s2.build.variant=atmegazero_esp32s2
+atmegazero_esp32s2.build.board=atmegazero_esp32s2
+
+atmegazero_esp32s2.build.serial=0
+atmegazero_esp32s2.build.f_cpu=240000000L
+atmegazero_esp32s2.build.flash_size=4MB
+atmegazero_esp32s2.build.flash_freq=80m
+atmegazero_esp32s2.build.flash_mode=qio
+atmegazero_esp32s2.build.boot=qio
+atmegazero_esp32s2.build.partitions=default
+atmegazero_esp32s2.build.defines=
+
+atmegazero_esp32s2.menu.SerialMode.cdc=USB CDC
+atmegazero_esp32s2.menu.SerialMode.cdc.build.serial=1
+atmegazero_esp32s2.menu.SerialMode.default=UART0
+atmegazero_esp32s2.menu.SerialMode.default.build.serial=0
+
+atmegazero_esp32s2.menu.PSRAM.disabled=Disabled
+atmegazero_esp32s2.menu.PSRAM.disabled.build.defines=
+atmegazero_esp32s2.menu.PSRAM.enabled=Enabled
+atmegazero_esp32s2.menu.PSRAM.enabled.build.defines=-DBOARD_HAS_PSRAM
+
+atmegazero_esp32s2.menu.PartitionScheme.default=Default 4MB with spiffs (1.2MB APP/1.5MB SPIFFS)
+atmegazero_esp32s2.menu.PartitionScheme.default.build.partitions=default
+atmegazero_esp32s2.menu.PartitionScheme.defaultffat=Default 4MB with ffat (1.2MB APP/1.5MB FATFS)
+atmegazero_esp32s2.menu.PartitionScheme.defaultffat.build.partitions=default_ffat
+atmegazero_esp32s2.menu.PartitionScheme.default_8MB=8M Flash (3MB APP/1.5MB FAT)
+atmegazero_esp32s2.menu.PartitionScheme.default_8MB.build.partitions=default_8MB
+atmegazero_esp32s2.menu.PartitionScheme.default_8MB.upload.maximum_size=3342336
+atmegazero_esp32s2.menu.PartitionScheme.minimal=Minimal (1.3MB APP/700KB SPIFFS)
+atmegazero_esp32s2.menu.PartitionScheme.minimal.build.partitions=minimal
+atmegazero_esp32s2.menu.PartitionScheme.no_ota=No OTA (2MB APP/2MB SPIFFS)
+atmegazero_esp32s2.menu.PartitionScheme.no_ota.build.partitions=no_ota
+atmegazero_esp32s2.menu.PartitionScheme.no_ota.upload.maximum_size=2097152
+atmegazero_esp32s2.menu.PartitionScheme.noota_3g=No OTA (1MB APP/3MB SPIFFS)
+atmegazero_esp32s2.menu.PartitionScheme.noota_3g.build.partitions=noota_3g
+atmegazero_esp32s2.menu.PartitionScheme.noota_3g.upload.maximum_size=1048576
+atmegazero_esp32s2.menu.PartitionScheme.noota_ffat=No OTA (2MB APP/2MB FATFS)
+atmegazero_esp32s2.menu.PartitionScheme.noota_ffat.build.partitions=noota_ffat
+atmegazero_esp32s2.menu.PartitionScheme.noota_ffat.upload.maximum_size=2097152
+atmegazero_esp32s2.menu.PartitionScheme.noota_3gffat=No OTA (1MB APP/3MB FATFS)
+atmegazero_esp32s2.menu.PartitionScheme.noota_3gffat.build.partitions=noota_3gffat
+atmegazero_esp32s2.menu.PartitionScheme.noota_3gffat.upload.maximum_size=1048576
+atmegazero_esp32s2.menu.PartitionScheme.huge_app=Huge APP (3MB No OTA/1MB SPIFFS)
+atmegazero_esp32s2.menu.PartitionScheme.huge_app.build.partitions=huge_app
+atmegazero_esp32s2.menu.PartitionScheme.huge_app.upload.maximum_size=3145728
+atmegazero_esp32s2.menu.PartitionScheme.min_spiffs=Minimal SPIFFS (1.9MB APP with OTA/190KB SPIFFS)
+atmegazero_esp32s2.menu.PartitionScheme.min_spiffs.build.partitions=min_spiffs
+atmegazero_esp32s2.menu.PartitionScheme.min_spiffs.upload.maximum_size=1966080
+atmegazero_esp32s2.menu.PartitionScheme.fatflash=16M Flash (2MB APP/12.5MB FAT)
+atmegazero_esp32s2.menu.PartitionScheme.fatflash.build.partitions=ffat
+atmegazero_esp32s2.menu.PartitionScheme.fatflash.upload.maximum_size=2097152
+atmegazero_esp32s2.menu.PartitionScheme.app3M_fat9M_16MB=16M Flash (3MB APP/9MB FATFS)
+atmegazero_esp32s2.menu.PartitionScheme.app3M_fat9M_16MB.build.partitions=app3M_fat9M_16MB
+atmegazero_esp32s2.menu.PartitionScheme.app3M_fat9M_16MB.upload.maximum_size=3145728
+
+atmegazero_esp32s2.menu.CPUFreq.240=240MHz (WiFi)
+atmegazero_esp32s2.menu.CPUFreq.240.build.f_cpu=240000000L
+atmegazero_esp32s2.menu.CPUFreq.160=160MHz (WiFi)
+atmegazero_esp32s2.menu.CPUFreq.160.build.f_cpu=160000000L
+atmegazero_esp32s2.menu.CPUFreq.80=80MHz (WiFi)
+atmegazero_esp32s2.menu.CPUFreq.80.build.f_cpu=80000000L
+atmegazero_esp32s2.menu.CPUFreq.40=40MHz
+atmegazero_esp32s2.menu.CPUFreq.40.build.f_cpu=40000000L
+atmegazero_esp32s2.menu.CPUFreq.20=20MHz
+atmegazero_esp32s2.menu.CPUFreq.20.build.f_cpu=20000000L
+atmegazero_esp32s2.menu.CPUFreq.10=10MHz
+atmegazero_esp32s2.menu.CPUFreq.10.build.f_cpu=10000000L
+
+atmegazero_esp32s2.menu.FlashMode.qio=QIO
+atmegazero_esp32s2.menu.FlashMode.qio.build.flash_mode=dio
+atmegazero_esp32s2.menu.FlashMode.qio.build.boot=qio
+atmegazero_esp32s2.menu.FlashMode.dio=DIO
+atmegazero_esp32s2.menu.FlashMode.dio.build.flash_mode=dio
+atmegazero_esp32s2.menu.FlashMode.dio.build.boot=dio
+atmegazero_esp32s2.menu.FlashMode.qout=QOUT
+atmegazero_esp32s2.menu.FlashMode.qout.build.flash_mode=dout
+atmegazero_esp32s2.menu.FlashMode.qout.build.boot=qout
+atmegazero_esp32s2.menu.FlashMode.dout=DOUT
+atmegazero_esp32s2.menu.FlashMode.dout.build.flash_mode=dout
+atmegazero_esp32s2.menu.FlashMode.dout.build.boot=dout
+
+atmegazero_esp32s2.menu.FlashFreq.80=80MHz
+atmegazero_esp32s2.menu.FlashFreq.80.build.flash_freq=80m
+atmegazero_esp32s2.menu.FlashFreq.40=40MHz
+atmegazero_esp32s2.menu.FlashFreq.40.build.flash_freq=40m
+
+atmegazero_esp32s2.menu.FlashSize.4M=4MB (32Mb)
+atmegazero_esp32s2.menu.FlashSize.4M.build.flash_size=4MB
+atmegazero_esp32s2.menu.FlashSize.8M=8MB (64Mb)
+atmegazero_esp32s2.menu.FlashSize.8M.build.flash_size=8MB
+atmegazero_esp32s2.menu.FlashSize.8M.build.partitions=default_8MB
+atmegazero_esp32s2.menu.FlashSize.2M=2MB (16Mb)
+atmegazero_esp32s2.menu.FlashSize.2M.build.flash_size=2MB
+atmegazero_esp32s2.menu.FlashSize.2M.build.partitions=minimal
+atmegazero_esp32s2.menu.FlashSize.16M=16MB (128Mb)
+atmegazero_esp32s2.menu.FlashSize.16M.build.flash_size=16MB
+
+atmegazero_esp32s2.menu.UploadSpeed.921600=921600
+atmegazero_esp32s2.menu.UploadSpeed.921600.upload.speed=921600
+atmegazero_esp32s2.menu.UploadSpeed.115200=115200
+atmegazero_esp32s2.menu.UploadSpeed.115200.upload.speed=115200
+atmegazero_esp32s2.menu.UploadSpeed.256000.windows=256000
+atmegazero_esp32s2.menu.UploadSpeed.256000.upload.speed=256000
+atmegazero_esp32s2.menu.UploadSpeed.230400.windows.upload.speed=256000
+atmegazero_esp32s2.menu.UploadSpeed.230400=230400
+atmegazero_esp32s2.menu.UploadSpeed.230400.upload.speed=230400
+atmegazero_esp32s2.menu.UploadSpeed.460800.linux=460800
+atmegazero_esp32s2.menu.UploadSpeed.460800.macosx=460800
+atmegazero_esp32s2.menu.UploadSpeed.460800.upload.speed=460800
+atmegazero_esp32s2.menu.UploadSpeed.512000.windows=512000
+atmegazero_esp32s2.menu.UploadSpeed.512000.upload.speed=512000
+
+atmegazero_esp32s2.menu.DebugLevel.none=None
+atmegazero_esp32s2.menu.DebugLevel.none.build.code_debug=0
+atmegazero_esp32s2.menu.DebugLevel.error=Error
+atmegazero_esp32s2.menu.DebugLevel.error.build.code_debug=1
+atmegazero_esp32s2.menu.DebugLevel.warn=Warn
+atmegazero_esp32s2.menu.DebugLevel.warn.build.code_debug=2
+atmegazero_esp32s2.menu.DebugLevel.info=Info
+atmegazero_esp32s2.menu.DebugLevel.info.build.code_debug=3
+atmegazero_esp32s2.menu.DebugLevel.debug=Debug
+atmegazero_esp32s2.menu.DebugLevel.debug.build.code_debug=4
+atmegazero_esp32s2.menu.DebugLevel.verbose=Verbose
+atmegazero_esp32s2.menu.DebugLevel.verbose.build.code_debug=5
+
+##############################################################
+
 deneyapmini.name=Deneyap Mini
 
 deneyapmini.vid.0=0x303a

variants/atmegazero_esp32s2/partitions.csv

+# ESP-IDF Partition Table
+# Name,   Type, SubType, Offset,  Size, Flags
+# bootloader.bin,,          0x1000, 32K
+# partition table,         0x8000, 4K
+
+nvs,      data, nvs,      0x9000,  20K,
+otadata,  data, ota,      0xe000,  8K,
+ota_0,    0,    ota_0,   0x10000,  1408K,
+ota_1,    0,    ota_1,  0x170000,  1408K,
+uf2,      app,  factory,0x2d0000,  256K,
+ffat,     data, fat,    0x310000,  960K,

variants/atmegazero_esp32s2/pins_arduino.h

+#ifndef Pins_Arduino_h
+#define Pins_Arduino_h
+
+#include <stdint.h>
+
+#define USB_VID 0x239A
+#define USB_PID 0x800A
+#define USB_MANUFACTURER "ATMegaZero"
+#define USB_PRODUCT "ATMZ-ESP32S2"
+#define USB_SERIAL ""
+
+#define EXTERNAL_NUM_INTERRUPTS 46
+#define NUM_DIGITAL_PINS        48
+#define NUM_ANALOG_INPUTS       20
+
+#define analogInputToDigitalPin(p)  (((p)<20)?(esp32_adc2gpio[(p)]):-1)
+#define digitalPinToInterrupt(p)    (((p)<48)?(p):-1)
+#define digitalPinHasPWM(p)         (p < 46)
+
+static const uint8_t NEOPIXEL = 40;
+static const uint8_t PD5 = 0;
+
+static const uint8_t TX = 43;
+static const uint8_t RX = 44;
+
+static const uint8_t SDA = 8;
+static const uint8_t SCL = 9;
+
+static const uint8_t SS    = 38;
+static const uint8_t MOSI  = 35;
+static const uint8_t MISO  = 37;
+static const uint8_t SCK   = 36;
+
+static const uint8_t A0 = 17;
+static const uint8_t A1 = 18;
+static const uint8_t A2 = 13;
+static const uint8_t A3 = 12;
+static const uint8_t A4 = 6;
+static const uint8_t A5 = 3;
+
+static const uint8_t T1 = 1;
+static const uint8_t T2 = 2;
+static const uint8_t T3 = 3;
+static const uint8_t T4 = 4;
+static const uint8_t T5 = 5;
+static const uint8_t T6 = 6;
+static const uint8_t T7 = 7;
+static const uint8_t T8 = 8;
+static const uint8_t T9 = 9;
+static const uint8_t T10 = 10;
+static const uint8_t T11 = 11;
+static const uint8_t T12 = 12;
+static const uint8_t T13 = 13;
+static const uint8_t T14 = 14;
+
+static const uint8_t DAC1 = 17;
+static const uint8_t DAC2 = 18;
+
+#endif /* Pins_Arduino_h */