thinknode_m8: initial support

variants/thinknode_m8/ThinkNodeM8Board.h

@@ -0,0 +1,50 @@
+#pragma once
+
+#include <MeshCore.h>
+#include <Arduino.h>
+#include <helpers/NRF52Board.h>
+
+// built-ins
+#define VBAT_MV_PER_LSB   (0.5859375F)   // 2.4V ADC range and 12-bit ADC resolution = 2400mV/4096
+
+#define VBAT_DIVIDER      (0.57F)          // 150K + 150K voltage divider on VBAT
+#define VBAT_DIVIDER_COMP (1.75F)          // Compensation factor for the VBAT divider
+
+#define PIN_VBAT_READ     (4)
+#define REAL_VBAT_MV_PER_LSB (VBAT_DIVIDER_COMP * VBAT_MV_PER_LSB)
+
+class ThinkNodeM8Board : public NRF52Board {
+public:
+  ThinkNodeM8Board() : NRF52Board("THINKNODE_M8_OTA") {}
+  void begin();
+  uint16_t getBattMilliVolts() override;
+
+  #if defined(P_LORA_TX_LED)
+  void onBeforeTransmit() override {
+    digitalWrite(P_LORA_TX_LED, HIGH);   // turn TX LED on
+  }
+  void onAfterTransmit() override {
+    digitalWrite(P_LORA_TX_LED, LOW);   // turn TX LED off
+  }
+  #endif
+
+  const char* getManufacturerName() const override {
+    return "Elecrow ThinkNode-M8";
+  }
+
+  void shutdownPeripherals() override {
+    // power off board
+    NRF52Board::shutdownPeripherals();
+
+    // make sure every gate is closed
+    digitalWrite(DISP_EN, LOW);
+    digitalWrite(PIN_PWR_EN, LOW);
+    digitalWrite(PIN_GPS_EN, LOW);
+    digitalWrite(SX126X_ANT_SW, LOW);
+    digitalWrite(ADC_EN, LOW);
+
+    #ifdef PIN_BUTTON1 // Use BTN to go out of sleep
+    nrf_gpio_cfg_sense_input(PIN_BUTTON1, NRF_GPIO_PIN_PULLUP, NRF_GPIO_PIN_SENSE_LOW);
+    #endif
+  }
+};