add Heltec v3 Lora board (ESP32-S3)

platformio_orig_s3.ini

@@ -3,6 +3,7 @@
 ;halfile = ttgotdongledisplays3.h
 ;halfile = ttgotdisplays3.h
 halfile = ttgotsupremes3.h
+;halfile = heltecv3.h
 
 [platformio]
 ; upload firmware to board with usb cable

shared/hal/heltecv3.h

@@ -0,0 +1,43 @@
+// clang-format off
+// upload_speed 1500000
+// board heltec_wifi_lora_32_V3
+
+#ifndef _HELTECV3_H
+#define _HELTECV3_H
+
+#include <stdint.h>
+
+// Hardware related definitions for Heltec V3 LoRa-32 S3 Board
+// see https://resource.heltec.cn/download/WiFi_LoRa_32_V3
+
+// LORA settings
+#define HAS_LORA 1 // use on board LORA
+#define CFG_sx1262_radio 1 // HPD16A
+// Pins for LORA chip SPI interface, reset line and interrupt lines
+#define LORA_IRQ DIO0
+#define LORA_IO1 LMIC_UNUSED_PIN
+#define LORA_IO2 LMIC_UNUSED_PIN
+#define LORA_SCK SCK
+#define LORA_MISO MISO
+#define LORA_MOSI MOSI
+#define LORA_RST RST_LoRa
+#define LORA_BUSY BUSY_LoRa
+#define LORA_CS SS
+
+#define HAS_DISPLAY 1
+#define HAS_LED LED_BUILTIN           
+#define HAS_BUTTON 0
+
+#define BAT_MEASURE_ADC ADC1_CHANNEL_0 // battery probe pin is GPIO1
+#define BAT_VOLTAGE_DIVIDER 4 // voltage divider 100k/390k on board
+
+// switches battery power and Vext, switch logic 0 = on / 1 = off
+#define EXT_POWER_SW Vext
+#define EXT_POWER_ON 0
+
+// Pins for I2C interface of OLED Display
+#define MY_DISPLAY_SDA SDA_OLED
+#define MY_DISPLAY_SCL SCL_OLED
+#define MY_DISPLAY_RST RST_OLED
+
+#endif