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| 1 | +# Copyright (c) Quectel Wireless Solution, Co., Ltd.All Rights Reserved. |
| 2 | +# |
| 3 | +# Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | +# you may not use this file except in compliance with the License. |
| 5 | +# You may obtain a copy of the License at |
| 6 | +# |
| 7 | +# http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | +# |
| 9 | +# Unless required by applicable law or agreed to in writing, software |
| 10 | +# distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | +# See the License for the specific language governing permissions and |
| 13 | +# limitations under the License. |
| 14 | + |
| 15 | +#!/usr/bin/env python |
| 16 | +# -*- coding: utf-8 -*- |
| 17 | + |
| 18 | +""" |
| 19 | +@file :aw9523.py |
| 20 | +@author :Jack Sun (jack.sun@quectel.com) |
| 21 | +@brief :<description> |
| 22 | +@version :1.0.0 |
| 23 | +@date :2023-02-01 09:21:44 |
| 24 | +@copyright :Copyright (c) 2022 |
| 25 | +""" |
| 26 | + |
| 27 | +from queue import Queue |
| 28 | +from machine import ExtInt |
| 29 | +from usr.logging import Logger |
| 30 | +from usr.common import create_thread |
| 31 | + |
| 32 | +log = Logger(__name__) |
| 33 | + |
| 34 | + |
| 35 | +_AW9523_DEFAULT_ADDR_KEY = (0x58) # The key drive address is 0x58, and the IO extension address is 0x5B |
| 36 | +_AW9523_DEFAULT_ADDR_IO = (0x5B) |
| 37 | +_AW9523_REG_CHIPID = (0x10) # Register for hardcode chip ID |
| 38 | +_AW9523_REG_SOFTRESET = (0x7F) # Register for soft resetting |
| 39 | +_AW9523_REG_INTENABLE0 = (0x06) # Register for enabling interrupt |
| 40 | +_AW9523_REG_GCR = (0x11) # Register for general configuration |
| 41 | +_AW9523_REG_LEDMODE = (0x12) # Register for configuring current |
| 42 | +_AW9523_REG_INPUT0 = (0x00) # Register for reading input values |
| 43 | +_AW9523_REG_OUTPUT0 = (0x02) # Register for writing output values |
| 44 | +_AW9523_REG_CONFIG0 = (0x04) # Register for configuring direction |
| 45 | + |
| 46 | + |
| 47 | +class Port(): |
| 48 | + # 表示两个8位端口之一 |
| 49 | + def __init__(self, port, aw): |
| 50 | + self._port = port & 1 # 0=PortA, 1=PortB |
| 51 | + self._aw = aw |
| 52 | + |
| 53 | + def _which_reg(self, reg): |
| 54 | + return reg + self._port |
| 55 | + |
| 56 | + def _flip_property_bit(self, reg, condition, bit): |
| 57 | + if condition: |
| 58 | + setattr(self, reg, getattr(self, reg) | bit) |
| 59 | + else: |
| 60 | + setattr(self, reg, getattr(self, reg) & ~bit) |
| 61 | + |
| 62 | + def _read(self, reg): |
| 63 | + r_data = bytearray(1) |
| 64 | + self._aw._i2c.read(self._aw._address, bytearray([self._which_reg(reg)]), 1, r_data, 1, 0) |
| 65 | + return list(r_data)[0] |
| 66 | + |
| 67 | + def _write(self, reg, val): |
| 68 | + val &= 0xff |
| 69 | + self._aw._i2c.write(self._aw._address, bytearray([self._which_reg(reg)]), 1, bytearray([val]), 1) |
| 70 | + |
| 71 | + @property |
| 72 | + def mode(self): |
| 73 | + return self._read(_AW9523_REG_CONFIG0) |
| 74 | + |
| 75 | + @mode.setter |
| 76 | + def mode(self, val): |
| 77 | + self._write(_AW9523_REG_CONFIG0, val) |
| 78 | + |
| 79 | + @property |
| 80 | + def interrupt_enable(self): |
| 81 | + return self._read(_AW9523_REG_INTENABLE0) |
| 82 | + |
| 83 | + @interrupt_enable.setter |
| 84 | + def interrupt_enable(self, val): |
| 85 | + # log.debug("val:",bin(val)) |
| 86 | + self._write(_AW9523_REG_INTENABLE0, val) |
| 87 | + |
| 88 | + # read only |
| 89 | + @property |
| 90 | + def interrupt_flag(self): |
| 91 | + return self._read(_AW9523_REG_INPUT0) |
| 92 | + |
| 93 | + @property |
| 94 | + def gpio(self): |
| 95 | + return self._read(_AW9523_REG_OUTPUT0) |
| 96 | + |
| 97 | + @gpio.setter |
| 98 | + def gpio(self, val): |
| 99 | + # writing to this register modifies the OLAT register for pins configured as output |
| 100 | + self._write(_AW9523_REG_OUTPUT0, val) |
| 101 | + |
| 102 | + |
| 103 | +class AW9523: |
| 104 | + |
| 105 | + # _pin_to_addr = ([0x24 + pin for pin in range(8)] + |
| 106 | + # [0x20 + pin - 8 for pin in range(8, 12)] + |
| 107 | + # [0x2C + pin - 12 for pin in range(12, 16)]) |
| 108 | + |
| 109 | + def __init__(self, i2c_bus, int_pin=1, int_mode=0, int_callback=None, address=_AW9523_DEFAULT_ADDR_KEY): |
| 110 | + self._i2c = i2c_bus |
| 111 | + self._int_pin = int_pin |
| 112 | + self._int_mode = int_mode |
| 113 | + self._address = address |
| 114 | + self._int_callback = int_callback |
| 115 | + self.__ext_thread_id = None |
| 116 | + self.__ext_queue = Queue() |
| 117 | + self._ret = 0x001F # 接收电平状态 |
| 118 | + |
| 119 | + if self._address == _AW9523_DEFAULT_ADDR_KEY: |
| 120 | + self._extint = ExtInt(self._int_pin, ExtInt.IRQ_RISING_FALLING, ExtInt.PULL_PU, self.__extfun) |
| 121 | + self._extint.enable() |
| 122 | + self.__ext_thread_id = create_thread(self.__extfun_thread, stack_size=0x4000) |
| 123 | + |
| 124 | + # Read device ID. AW9523B ID read default value is 23H |
| 125 | + self.read_buf = bytearray(5) |
| 126 | + self._i2c.read(address, bytearray((_AW9523_REG_CHIPID, 0xff)), 1, self.read_buf, 1, 20) |
| 127 | + # log.debug("read_buff:", self.read_buf) |
| 128 | + if (self.read_buf[0] != 0x23): |
| 129 | + raise AttributeError("Cannot find a AW9523") |
| 130 | + |
| 131 | + # self.reset() |
| 132 | + self.porta = Port(0, self) |
| 133 | + self.portb = Port(1, self) |
| 134 | + |
| 135 | + def __extfun(self, args): |
| 136 | + self.__ext_queue.put(args) |
| 137 | + |
| 138 | + #执行中断回调 |
| 139 | + def __extfun_thread(self): |
| 140 | + while 1: |
| 141 | + args = self.__ext_queue.get() |
| 142 | + log.debug('### interrupt {} ###'.format(args)) |
| 143 | + # 读取两组电平,判断触发了中断的io,中断信号前后电平对比 |
| 144 | + # status_0 = self._read(_AW9523_REG_INPUT0) |
| 145 | + # status_1 = self._read(_AW9523_REG_INPUT0 + 1) |
| 146 | + self._i2c.read(_AW9523_DEFAULT_ADDR_KEY, bytearray((_AW9523_REG_INPUT0, 0xff)), 1, self.read_buf, 1, 20) |
| 147 | + status_0 = self.read_buf[0] |
| 148 | + self._i2c.read(_AW9523_DEFAULT_ADDR_KEY, bytearray((_AW9523_REG_INPUT0 + 1, 0xff)), 1, self.read_buf, 1, 20) |
| 149 | + status_1 = self.read_buf[0] |
| 150 | + status = (status_1 << 8) | status_0 |
| 151 | + # log.debug('### io level {} ###'.format(bin(status))) |
| 152 | + |
| 153 | + change = (self._ret ^ status) |
| 154 | + if self._int_callback is None: |
| 155 | + return |
| 156 | + |
| 157 | + #byte 引脚号 pin_level 电平 |
| 158 | + if change is not 0: |
| 159 | + byte = 0 |
| 160 | + pin_level = 1 |
| 161 | + while byte < 16: |
| 162 | + if (change & (1 << byte)): |
| 163 | + break |
| 164 | + else: |
| 165 | + byte = byte + 1 |
| 166 | + |
| 167 | + if (status & (1 << byte)): |
| 168 | + pin_level = 1 |
| 169 | + else: |
| 170 | + pin_level = 0 |
| 171 | + |
| 172 | + #判断是否该IO是否中断使能 |
| 173 | + # flag_0 = self._read(_AW9523_REG_INTENABLE0) |
| 174 | + # flag_1 = self._read(_AW9523_REG_INTENABLE0 + 1) |
| 175 | + self._i2c.read(_AW9523_DEFAULT_ADDR_KEY, bytearray((_AW9523_REG_INTENABLE0, 0xff)), 1, self.read_buf, 1, 20) |
| 176 | + flag_0 = self.read_buf[0] |
| 177 | + self._i2c.read(_AW9523_DEFAULT_ADDR_KEY, bytearray((_AW9523_REG_INTENABLE0 + 1, 0xff)), 1, self.read_buf, 1, 20) |
| 178 | + flag_1 = self.read_buf[0] |
| 179 | + flag = (flag_1 << 8) | flag_0 |
| 180 | + if flag & (1 << byte) == 0: |
| 181 | + list_push = [byte, pin_level] |
| 182 | + self._int_callback(list_push) |
| 183 | + # log.debug('### io level {} ###'.format(bin(status))) |
| 184 | + # 保存上一次电平状态 |
| 185 | + self._ret = status |
| 186 | + |
| 187 | + def _read(self, addr): |
| 188 | + r_data = bytearray(1) |
| 189 | + self._i2c.read(self._address, bytearray([addr]), 1, r_data, 1, 20) |
| 190 | + return list(r_data)[0] |
| 191 | + |
| 192 | + def _write(self, addr, *vals): |
| 193 | + # log.debug("write vals:", vals) |
| 194 | + self._i2c.write(self._address, bytearray([addr]), 1, bytearray(list(vals)), len(list(vals))) |
| 195 | + |
| 196 | + def reset(self): |
| 197 | + self._write(_AW9523_REG_SOFTRESET, 0x00) # 对该寄存器写 00H 复位 reset |
| 198 | + self._write(_AW9523_REG_GCR, 0b00010000) # pushpull output D[4]=0,Open-Drain模式; D[4]=1,Push-Pull模式 |
| 199 | + self._write(_AW9523_REG_INTENABLE0, 0xff, 0xff) # no IRQ 0-中断使能; 1-中断不使能 |
| 200 | + self._write(_AW9523_REG_INTENABLE0 + 1, 0xff, 0xff) # no IRQ |
| 201 | + # self._write(_AW9523_REG_LEDMODE, 0xff, 0xff) #gpio mode |
| 202 | + # self._write(_AW9523_REG_LEDMODE+1, 0xff, 0xff) #gpio mode |
| 203 | + |
| 204 | + # set aw9523 pin |
| 205 | + def pin(self, pin, mode=None, value=None, interrupt_enable=None): |
| 206 | + assert 0 <= pin <= 15 |
| 207 | + port = self.portb if pin // 8 else self.porta |
| 208 | + bit = (1 << (pin % 8)) |
| 209 | + if mode is not None: |
| 210 | + # 0: Pin is configured as an output |
| 211 | + # 1: Pin is configured as an input |
| 212 | + port._flip_property_bit('mode', mode & 1, bit) |
| 213 | + if value is not None: |
| 214 | + # 0: 引脚设置为逻辑低电平 |
| 215 | + # 1: 引脚设置为逻辑高电平 |
| 216 | + port._flip_property_bit('gpio', value & 1, bit) |
| 217 | + if interrupt_enable is not None: |
| 218 | + # 1: Disables GPIO input pin for interrupt-on-change event |
| 219 | + # 0: Enables GPIO input pin for interrupt-on-change event |
| 220 | + if interrupt_enable == 0: |
| 221 | + interrupt_enable = 1 |
| 222 | + else: |
| 223 | + interrupt_enable = 0 |
| 224 | + port._flip_property_bit('interrupt_enable', interrupt_enable & 1, bit) |
| 225 | + if value is None: |
| 226 | + return port.gpio & bit == bit |
| 227 | + |
| 228 | + # mode (IODIR register) |
| 229 | + @property |
| 230 | + def mode(self): |
| 231 | + return self.porta.mode | (self.portb.mode << 8) |
| 232 | + |
| 233 | + @mode.setter |
| 234 | + def mode(self, val): |
| 235 | + self.porta.mode = val |
| 236 | + self.portb.mode = (val >> 8) |
| 237 | + |
| 238 | + # interrupt_enable (GPINTEN register) |
| 239 | + @property |
| 240 | + def interrupt_enable(self): |
| 241 | + return self.porta.interrupt_enable | (self.portb.interrupt_enable << 8) |
| 242 | + |
| 243 | + @interrupt_enable.setter |
| 244 | + def interrupt_enable(self, val): |
| 245 | + self.porta.interrupt_enable = val |
| 246 | + self.portb.interrupt_enable = (val >> 8) |
| 247 | + |
| 248 | + # interrupt_flag (INTF register) |
| 249 | + # read only |
| 250 | + @property |
| 251 | + def interrupt_flag(self): |
| 252 | + return self.porta.interrupt_flag | (self.portb.interrupt_flag << 8) |
| 253 | + |
| 254 | + # gpio (GPIO register) |
| 255 | + @property |
| 256 | + def gpio(self): |
| 257 | + return self.porta.gpio | (self.portb.gpio << 8) |
| 258 | + |
| 259 | + @gpio.setter |
| 260 | + def gpio(self, val): |
| 261 | + self.porta.gpio = val |
| 262 | + self.portb.gpio = (val >> 8) |
| 263 | + |
| 264 | + # 获取引脚电平,pin为引脚号0~15 |
| 265 | + def read(self, pin): |
| 266 | + status_0 = self._read(_AW9523_REG_INPUT0) |
| 267 | + status_1 = self._read(_AW9523_REG_INPUT0 + 1) |
| 268 | + status = (status_1 << 8) | status_0 |
| 269 | + pin_level = 0 |
| 270 | + if (status & (1 << pin)): |
| 271 | + pin_level = 1 |
| 272 | + else: |
| 273 | + pin_level = 0 |
| 274 | + return pin_level |
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