Add New Board: Cytron Maker Feather AIoT S3. (#7348)

* Added support for Cytron Maker Feather AIoT S3.

* 1. Select OPI PSRAM by default.
2. Fixed pin name error in variant.cpp.
3. Added definition for RGB_BUILTIN.

* Define the RGB_BUILTIN as shown in #6979.

* Added pin definition for A12 (Vin Sense).

variants/cytron_maker_feather_aiot_s3/partitions-8MB-tinyuf2.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,  2048K,
+ota_1,    0,    ota_1,  0x210000,  2048K,
+uf2,      app,  factory,0x410000,  256K,
+ffat,     data, fat,    0x450000,  3776K,

variants/cytron_maker_feather_aiot_s3/pins_arduino.h

+#ifndef Pins_Arduino_h
+#define Pins_Arduino_h
+
+#include <stdint.h>
+#include "soc/soc_caps.h"
+
+#define USB_VID            0x303A
+#define USB_PID            0x80F8
+#define USB_MANUFACTURER   "Cytron"
+#define USB_PRODUCT        "Maker Feather AIoT S3"
+#define USB_SERIAL         ""
+
+#define EXTERNAL_NUM_INTERRUPTS 46
+#define NUM_DIGITAL_PINS        20
+#define NUM_ANALOG_INPUTS       12
+
+#define analogInputToDigitalPin(p)  (((p)<20)?(analogChannelToDigitalPin(p)):-1)
+#define digitalPinToInterrupt(p)    (((p)<48)?(p):-1)
+#define digitalPinHasPWM(p)         (p < 46)
+
+
+
+static const uint8_t LED_BUILTIN = 2;                           // Status LED.
+static const uint8_t RGB_BUILTIN = SOC_GPIO_PIN_COUNT + 46;     // RGB LED.
+
+#define BUILTIN_LED     LED_BUILTIN                             // Backward compatibility
+#define LED_BUILTIN     LED_BUILTIN
+#define LED             LED_BUILTIN
+#define RGB_BUILTIN     RGB_BUILTIN
+#define RGB             RGB_BUILTIN
+#define NEOPIXEL        RGB_BUILTIN
+#define RGB_BRIGHTNESS  65
+
+
+
+#define VP_EN               11      // V Peripheral Enable.
+#define BUZZER              12      // Piezo Buzzer.
+#define BOOT                0       // Boot Button.
+#define BUTTON              3       // User Button.
+
+#define VIN                 13      // Vin Sense.
+#define VBATT               13
+#define VOLTAGE_MONITOR     13
+
+
+static const uint8_t TX = 15;
+static const uint8_t RX = 16;
+
+static const uint8_t SDA = 42;
+static const uint8_t SCL = 41;
+
+static const uint8_t SS    = 7;
+static const uint8_t MOSI  = 8;
+static const uint8_t SCK   = 17;
+static const uint8_t MISO  = 18;
+
+static const uint8_t A0 = 10;
+static const uint8_t A1 = 9;
+static const uint8_t A2 = 6;
+static const uint8_t A3 = 5;
+static const uint8_t A4 = 4;
+static const uint8_t A5 = 7;
+
+static const uint8_t A6 = 17;
+static const uint8_t A7 = 8;
+static const uint8_t A8 = 18;
+static const uint8_t A9 = 16;
+static const uint8_t A10 = 15;
+static const uint8_t A11 = 14;
+static const uint8_t A12 = 13;
+
+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 T14 = 14;
+
+#endif /* Pins_Arduino_h */

variants/cytron_maker_feather_aiot_s3/variant.cpp

+/* 
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2022 Wai Weng for Cytron Technologies
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+
+#include "esp32-hal-gpio.h"
+#include "pins_arduino.h"
+
+extern "C" {
+
+// Initialize variant/board, called before setup()
+void initVariant(void)
+{
+  // Turn on VPeripheral by default.
+  pinMode(VP_EN, OUTPUT);
+  digitalWrite(VP_EN, HIGH);
+}
+}