Added support for LilyGo T-Echo

variants/techo/variant.cpp

@@ -0,0 +1,22 @@
+#include "variant.h"
+#include "wiring_constants.h"
+#include "wiring_digital.h"
+
+const uint32_t g_ADigitalPinMap[] = {
+  0xff, 0xff, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
+  14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26,
+  27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39,
+  40, 41, 42, 43, 44, 45, 46, 47
+};
+
+void initVariant()
+{
+  pinMode(LED_RED, OUTPUT);
+  ledOff(LED_RED);
+
+  pinMode(LED_GREEN, OUTPUT);
+  ledOff(LED_GREEN);
+
+  pinMode(LED_BLUE, OUTPUT);
+  ledOff(LED_BLUE);
+}

variants/techo/variant.h

@@ -0,0 +1,102 @@
+/*
+ * variant.h
+ * Copyright (C) 2023 Seeed K.K.
+ * MIT License
+ */
+
+#pragma once
+
+#include "WVariant.h"
+
+////////////////////////////////////////////////////////////////////////////////
+// Low frequency clock source
+
+#define USE_LFXO    // 32.768 kHz crystal oscillator
+#define VARIANT_MCK (64000000ul)
+
+#define WIRE_INTERFACES_COUNT 	(1)
+
+////////////////////////////////////////////////////////////////////////////////
+// Power
+
+#define PIN_PWR_EN              (6)
+
+#define BATTERY_PIN             (4)
+#define ADC_MULTIPLIER          (4.90F)
+
+#define ADC_RESOLUTION          (14)
+#define BATTERY_SENSE_RES       (12)
+
+#define AREF_VOLTAGE            (3.0)
+
+////////////////////////////////////////////////////////////////////////////////
+// Number of pins
+
+#define PINS_COUNT              (48)
+#define NUM_DIGITAL_PINS        (48)
+#define NUM_ANALOG_INPUTS       (1)
+#define NUM_ANALOG_OUTPUTS      (0)
+
+////////////////////////////////////////////////////////////////////////////////
+// UART pin definition
+
+#define PIN_SERIAL1_RX          (41) // GPS TX
+#define PIN_SERIAL1_TX          (40) // GPS RX
+
+////////////////////////////////////////////////////////////////////////////////
+// I2C pin definition
+
+#define PIN_WIRE_SDA            (26)             // P0.26
+#define PIN_WIRE_SCL            (27)             // P0.27
+
+////////////////////////////////////////////////////////////////////////////////
+// SPI pin definition
+
+#define SPI_INTERFACES_COUNT    (2)
+
+#define PIN_SPI_MISO            (23)
+#define PIN_SPI_MOSI            (22)
+#define PIN_SPI_SCK             (19)
+#define PIN_SPI_NSS             (24)
+
+////////////////////////////////////////////////////////////////////////////////
+// Builtin LEDs
+
+#define LED_RED                 (13)
+#define LED_BLUE                (14)
+#define LED_GREEN               (15)
+
+#define LED_BUILTIN             (15)
+#define PIN_LED                 LED_BUILTIN
+#define LED_PIN                 LED_BUILTIN
+#define LED_STATE_ON            LOW
+
+#define PIN_NEOPIXEL            (14)
+#define NEOPIXEL_NUM            (2)
+
+////////////////////////////////////////////////////////////////////////////////
+// Builtin buttons
+
+#define PIN_BUTTON1             (42)
+#define BUTTON_PIN              PIN_BUTTON1
+
+#define PIN_BUTTON2             (18)
+#define BUTTON_PIN2             PIN_BUTTON2
+
+#define EXTERNAL_FLASH_DEVICES MX25R1635F
+#define EXTERNAL_FLASH_USE_QSPI
+
+////////////////////////////////////////////////////////////////////////////////
+// Lora
+
+#define USE_SX1262
+#define LORA_CS                 (24)
+#define SX126X_DIO1             (20)
+#define SX126X_BUSY             (17)
+#define SX126X_RESET            (25)
+#define SX126X_DIO2_AS_RF_SWITCH
+#define SX126X_DIO3_TCXO_VOLTAGE 1.8
+
+#define PIN_SPI1_MISO           (39)
+#define PIN_SPI1_MOSI           (29)
+#define PIN_SPI1_SCK            (31)