lilygo-t-cameraplus-s3 add pmic (#586)

main/boards/common/sy6970.cc

@@ -0,0 +1,58 @@
+#include "sy6970.h"
+#include "board.h"
+#include "display.h"
+
+#include <esp_log.h>
+
+#define TAG "Sy6970"
+
+Sy6970::Sy6970(i2c_master_bus_handle_t i2c_bus, uint8_t addr) : I2cDevice(i2c_bus, addr) {
+}
+
+int Sy6970::GetChangingStatus() {
+    return (ReadReg(0x0B) >> 3) & 0x03;
+}
+
+bool Sy6970::IsCharging() {
+    return GetChangingStatus() != 0;
+}
+
+bool Sy6970::IsPowerGood() {
+    return (ReadReg(0x0B) & 0x04) != 0;
+}
+
+bool Sy6970::IsChargingDone() {
+    return GetChangingStatus() == 3;
+}
+
+int Sy6970::GetBatteryVoltage() {
+    uint8_t value = ReadReg(0x0E);
+    value &= 0x7F;
+    if (value == 0) {
+        return 0;
+    }
+    return value * 20 + 2304;
+}
+
+int Sy6970::GetChargeTargetVoltage() {
+    uint8_t value = ReadReg(0x06);
+    value = (value & 0xFC) >> 2;
+    if (value > 0x30) {
+        return 4608;
+    }
+    return value * 16 + 3840;
+}
+
+int Sy6970::GetBatteryLevel() {
+    int battery_minimum_voltage = 3200; // 电池所能掉电的最低电压
+    int battery_voltage = GetBatteryVoltage();
+    int charge_voltage_limit = GetChargeTargetVoltage();
+    if (battery_voltage > battery_minimum_voltage && charge_voltage_limit > battery_minimum_voltage) {
+        return (((float) battery_voltage - (float) battery_minimum_voltage) / ((float) charge_voltage_limit - (float) battery_minimum_voltage)) * 100.0;
+    }
+    return 0;
+}
+
+void Sy6970::PowerOff() {
+    WriteReg(0x09,0B01100100);
+}

main/boards/common/sy6970.h

@@ -0,0 +1,21 @@
+#ifndef __SY6970_H__
+#define __SY6970_H__
+
+#include "i2c_device.h"
+
+class Sy6970 : public I2cDevice {
+public:
+    Sy6970(i2c_master_bus_handle_t i2c_bus, uint8_t addr);
+    bool IsCharging();
+    bool IsPowerGood();
+    bool IsChargingDone();
+    int GetBatteryLevel();
+    void PowerOff();
+
+private:
+    int GetChangingStatus();
+    int GetBatteryVoltage();
+    int GetChargeTargetVoltage();
+};
+
+#endif