CoreS3 refactored & remove M5 libraries (#143)

Remove dependencies M5Unified and M5GFX because:
- Sometimes the release doesn't even compile
- The amount of functions is too close to the limit (I recently had to remove some code/dependency to be able to make a build at all)
- Graphics performance issue since last update
- Touch screen performance issues (not perfect yet, but better)
- Compatibility issues with Tactility SPI/I2C versus M5Unified/M5GFX variants.

Boards/M5stackCoreS3/Source/Axp2101/Axp2101.cpp

@@ -0,0 +1,74 @@
+#include "Axp2101.h"
+#include "Log.h"
+
+bool Axp2101::readRegister12(uint8_t reg, float& out) const {
+    std::uint8_t data[2] = {0};
+    if (tt::hal::i2c::masterRead(port, DEFAULT_ADDRESS, reg, data, 2, DEFAULT_TIMEOUT) == ESP_OK) {
+        out = (data[0] & 0x0F) << 8 | data[1];
+        return true;
+    } else {
+        return false;
+    }
+}
+
+bool Axp2101::readRegister14(uint8_t reg, float& out) const {
+    std::uint8_t data[2] = {0};
+    if (tt::hal::i2c::masterRead(port, DEFAULT_ADDRESS, reg, data, 2, DEFAULT_TIMEOUT) == ESP_OK) {
+        out = (data[0] & 0x3F) << 8 | data[1];
+        return true;
+    } else {
+        return false;
+    }
+}
+
+bool Axp2101::readRegister16(uint8_t reg, uint16_t& out) const {
+    std::uint8_t data[2] = {0};
+    if (tt::hal::i2c::masterRead(port, DEFAULT_ADDRESS, reg, data, 2, DEFAULT_TIMEOUT) == ESP_OK) {
+        out = data[0] << 8 | data[1];
+        return true;
+    } else {
+        return false;
+    }
+}
+
+bool Axp2101::readRegister8(uint8_t reg, uint8_t& result) const {
+    return tt::hal::i2c::masterWriteRead(port, DEFAULT_ADDRESS, &reg, 1, &result, 1, DEFAULT_TIMEOUT);
+}
+
+bool Axp2101::writeRegister8(uint8_t reg, uint8_t value) const {
+    return tt::hal::i2c::masterWrite(port, DEFAULT_ADDRESS, reg, &value, 1, DEFAULT_TIMEOUT);
+}
+
+bool Axp2101::getBatteryVoltage(float& vbatMillis) const {
+    return readRegister14(0x34, vbatMillis);
+}
+
+bool Axp2101::getChargeStatus(ChargeStatus& status) const {
+    uint8_t value;
+    if (readRegister8(0x01, value)) {
+        value = (value >> 5) & 0b11;
+        status = (value == 1) ? CHARGE_STATUS_CHARGING : ((value == 2) ? CHARGE_STATUS_DISCHARGING : CHARGE_STATUS_STANDBY);
+        return true;
+    } else {
+        return false;
+    }
+}
+
+bool Axp2101::isChargingEnabled(bool& enabled) const {
+    uint8_t value;
+    if (readRegister8(0x18, value)) {
+        enabled = value & 0b10;
+        return true;
+    } else {
+        return false;
+    }
+}
+
+bool Axp2101::setChargingEnabled(bool enabled) const {
+    uint8_t value;
+    if (readRegister8(0x18, value)) {
+        return writeRegister8(0x18, (value & 0xFD) | (enabled << 1));
+    } else {
+        return false;
+    }
+}

Boards/M5stackCoreS3/Source/Axp2101/Axp2101.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#include "hal/i2c/I2c.h"
+
+/**
+ * References:
+ * - https://github.com/m5stack/M5Unified/blob/master/src/utility/AXP2101_Class.cpp
+ * - http://file.whycan.com/files/members/6736/AXP2101_Datasheet_V1.0_en_3832.pdf
+ */
+class Axp2101 {
+
+    i2c_port_t port;
+
+    static constexpr uint8_t DEFAULT_ADDRESS = 0x34;
+    static constexpr TickType_t DEFAULT_TIMEOUT = 1000 / portTICK_PERIOD_MS;
+
+    bool readRegister8(uint8_t reg, uint8_t& result) const;
+    bool writeRegister8(uint8_t reg, uint8_t value) const;
+    bool readRegister12(uint8_t reg, float& out) const;
+    bool readRegister14(uint8_t reg, float& out) const;
+    bool readRegister16(uint8_t reg, uint16_t& out) const;
+
+public:
+
+    enum ChargeStatus {
+        CHARGE_STATUS_CHARGING = 0b01,
+        CHARGE_STATUS_DISCHARGING = 0b10,
+        CHARGE_STATUS_STANDBY = 0b00
+    };
+
+    Axp2101(i2c_port_t port) : port(port) {}
+
+    bool getBatteryVoltage(float& vbatMillis) const;
+    bool getChargeStatus(ChargeStatus& status) const;
+    bool isChargingEnabled(bool& enabled) const;
+    bool setChargingEnabled(bool enabled) const;
+};