ESP32s3: Migrate variants to new structure (#7343)

variants/esp32s3/heltec_v3/variant.h

@@ -0,0 +1,42 @@
+#define LED_PIN LED
+
+#define USE_SSD1306 // Heltec_v3 has a SSD1306 display
+
+#define RESET_OLED RST_OLED
+#define I2C_SDA SDA_OLED // I2C pins for this board
+#define I2C_SCL SCL_OLED
+
+// Enable secondary bus for external periherals
+#define I2C_SDA1 SDA
+#define I2C_SCL1 SCL
+
+#define VEXT_ENABLE Vext // active low, powers the oled display and the lora antenna boost
+#define BUTTON_PIN 0
+
+#define ADC_CTRL 37
+#define ADC_CTRL_ENABLED LOW
+#define BATTERY_PIN 1 // A battery voltage measurement pin, voltage divider connected here to measure battery voltage
+#define ADC_CHANNEL ADC1_GPIO1_CHANNEL
+#define ADC_ATTENUATION ADC_ATTEN_DB_2_5 // lower dB for high resistance voltage divider
+#define ADC_MULTIPLIER 4.9 * 1.045
+
+#define USE_SX1262
+
+#define LORA_DIO0 -1 // a No connect on the SX1262 module
+#define LORA_RESET 12
+#define LORA_DIO1 14 // SX1262 IRQ
+#define LORA_DIO2 13 // SX1262 BUSY
+#define LORA_DIO3    // Not connected on PCB, but internally on the TTGO SX1262, if DIO3 is high the TXCO is enabled
+
+#define LORA_SCK 9
+#define LORA_MISO 11
+#define LORA_MOSI 10
+#define LORA_CS 8
+
+#define SX126X_CS LORA_CS
+#define SX126X_DIO1 LORA_DIO1
+#define SX126X_BUSY LORA_DIO2
+#define SX126X_RESET LORA_RESET
+
+#define SX126X_DIO2_AS_RF_SWITCH
+#define SX126X_DIO3_TCXO_VOLTAGE 1.8