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libraries/XPowersLib/Micropython/src/I2CInterface.py

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+'''
+@license MIT License
+
+Copyright (c) 2022 lewis he
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+@file      I2CInterface.py
+@author    Lewis He (lewishe@outlook.com)
+@date      2022-10-20
+
+'''
+
+from sys import implementation
+
+if implementation.name == 'micropython':
+    from machine import Pin, I2C
+if implementation.name == 'circuitpython':
+    from adafruit_bus_device import i2c_device
+
+
+class I2CInterface:
+    def __init__(self, i2c_bus: I2C, addr: int) -> None:
+        if implementation.name == 'micropython':
+            print('micropython')
+            self._bus = i2c_bus
+        if implementation.name == 'circuitpython':
+            print('circuitpython')
+            self._bus = i2c_device.I2CDevice(i2c_bus, addr)
+        self._address = addr
+
+    def _BV(self, bit) -> int:
+        return (1 << bit)
+
+    def _IS_BIT_SET(self, val, mask) -> bool:
+        return bool((((val) & (mask)) == (mask)))
+
+    def writeRegister(self, reg: int, val: int) -> None:
+        if implementation.name == 'micropython':
+            buf = bytearray(1)
+            buf[0] = val
+            self._bus.writeto_mem(
+                self._address, (reg & 0xFF), buf)
+        elif implementation.name == 'circuitpython':
+            buf = bytearray(2)
+            buf[0] = reg & 0xFF
+            buf[1] = val & 0xFF
+            with self._bus as i2c:
+                i2c.write(buf, start=0, end=2)
+
+    def readRegister(self, reg: int, length: int = 1) -> list:
+        if implementation.name == 'micropython':
+            buf = bytearray(length)
+            self._bus.readfrom_mem_into(
+                self._address, (reg & 0xFF), buf)
+            return list(buf)
+        elif implementation.name == 'circuitpython':
+            with self._bus as i2c:
+                i2c.write(bytes([reg & 0xFF]))
+                result = bytearray(length)
+                i2c.readinto(result)
+                return result
+
+    def getRegisterBit(self, reg, bit) -> bool:
+        val = self.readRegister(reg)[0]
+        return val & self._BV(bit)
+
+    def setRegisterBit(self, reg: int, bit: int):
+        val = self.readRegister(reg)[0]
+        self.writeRegister(reg, (val | (self._BV(bit))))
+
+    def clrRegisterBit(self, reg: int, bit: int):
+        val = self.readRegister(reg)[0]
+        self.writeRegister(reg, (val & (~self._BV(bit))))
+
+    def readRegisterH8L4(self, highReg, lowReg) -> int:
+        h8 = self.readRegister(highReg)[0]
+        l4 = self.readRegister(lowReg)[0]
+        return (h8 << 4) | (l4 & 0x0F)
+
+    def readRegisterH8L5(self, highReg, lowReg) -> int:
+        h8 = self.readRegister(highReg)[0]
+        l5 = self.readRegister(lowReg)[0]
+        return (h8 << 5) | (l5 & 0x1F)
+
+    def readRegisterH6L8(self, highReg, lowReg) -> int:
+        h6 = self.readRegister(highReg)[0]
+        l8 = self.readRegister(lowReg)[0]
+        return ((h6 & 0x3F) << 8) | l8
+
+    def readRegisterH5L8(self, highReg, lowReg) -> int:
+        h5 = self.readRegister(highReg)[0]
+        l8 = self.readRegister(lowReg)[0]
+        return ((h5 & 0x1F) << 8) | l8