add some code

main/boards/common/axp2101.cc

@@ -0,0 +1,41 @@
+#include "axp2101.h"
+#include "board.h"
+#include "display.h"
+
+#include <esp_log.h>
+
+#define TAG "Axp2101"
+
+Axp2101::Axp2101(i2c_master_bus_handle_t i2c_bus, uint8_t addr) : I2cDevice(i2c_bus, addr) {
+}
+
+int Axp2101::GetBatteryCurrentDirection() {
+    return (ReadReg(0x01) & 0b01100000) >> 5;
+}
+
+bool Axp2101::IsCharging() {
+    return GetBatteryCurrentDirection() == 1;
+}
+
+bool Axp2101::IsDischarging() {
+    return GetBatteryCurrentDirection() == 2;
+}
+
+bool Axp2101::IsChargingDone() {
+    uint8_t value = ReadReg(0x01);
+    return (value & 0b00000111) == 0b00000100;
+}
+
+int Axp2101::GetBatteryLevel() {
+    return ReadReg(0xA4);
+}
+
+float Axp2101::GetTemperature() {
+    return ReadReg(0xA5);
+}
+
+void Axp2101::PowerOff() {
+    uint8_t value = ReadReg(0x10);
+    value = value | 0x01;
+    WriteReg(0x10, value);
+}