mpython.py源码

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# labplus mPython library
# MIT license; Copyright (c) 2018 labplus
# V1.0 Zhang KaiHua(apple_eat@126.com)

# mpython buildin periphers drivers

# history:
# V1.1 add oled draw function,add buzz.freq().  by tangliufeng
# V1.2 add servo/ui class,by tangliufeng

from machine import I2C, PWM, Pin, ADC, TouchPad, UART
from ssd1106 import SSD1106_I2C
import esp, math, time, network
import ustruct, array
from neopixel import NeoPixel
from esp import dht_readinto
from time import sleep_ms, sleep_us, sleep
from framebuf import FrameBuffer

i2c = I2C(scl=Pin(Pin.P19), sda=Pin(Pin.P20), freq=400000)


class Font(object):
    def __init__(self, font_address=0x400000):
        self.font_address = font_address
        buffer = bytearray(18)
        esp.flash_read(self.font_address, buffer)
        self.header, \
            self.height, \
            self.width, \
            self.baseline, \
            self.x_height, \
            self.Y_height, \
            self.first_char,\
            self.last_char = ustruct.unpack('4sHHHHHHH', buffer)
        self.first_char_info_address = self.font_address + 18

    def GetCharacterData(self, c):
        uni = ord(c)
        # if uni not in range(self.first_char, self.last_char):
        #     return None
        if (uni < self.first_char or uni > self.last_char):
            return None
        char_info_address = self.first_char_info_address + \
            (uni - self.first_char) * 6
        buffer = bytearray(6)
        esp.flash_read(char_info_address, buffer)
        ptr_char_data, len = ustruct.unpack('IH', buffer)
        if (ptr_char_data) == 0 or (len == 0):
            return None
        buffer = bytearray(len)
        esp.flash_read(ptr_char_data + self.font_address, buffer)
        return buffer


class TextMode():
    normal = 1
    rev = 2
    trans = 3
    xor = 4


class OLED(SSD1106_I2C):
    """ 128x64 oled display """

    def __init__(self):
        super().__init__(128, 64, i2c)
        self.f = Font()
        if self.f is None:
            raise Exception('font load failed')

    def DispChar(self, s, x, y, mode=TextMode.normal):
        if self.f is None:
            return
        for c in s:
            data = self.f.GetCharacterData(c)
            if data is None:
                x = x + self.width
                continue
            width, bytes_per_line = ustruct.unpack('HH', data[:4])
            # print('character [%d]: width = %d, bytes_per_line = %d' % (ord(c)
            # , width, bytes_per_line))
            for h in range(0, self.f.height):
                w = 0
                i = 0
                while w < width:
                    mask = data[4 + h * bytes_per_line + i]
                    if (width - w) >= 8:
                        n = 8
                    else:
                        n = width - w
                    py = y + h
                    page = py >> 3
                    bit = 0x80 >> (py % 8)
                    for p in range(0, n):
                        px = x + w + p
                        c = 0
                        if (mask & 0x80) != 0:
                            if mode == TextMode.normal or \
                               mode == TextMode.trans:
                                c = 1
                            if mode == TextMode.rev:
                                c = 0
                            if mode == TextMode.xor:
                                c = self.buffer[page * 128 + px] & bit
                                if c != 0:
                                    c = 0
                                else:
                                    c = 1
                                # print("px = %d, py = %d, c = %d" % (px, py, c))
                            super().pixel(px, py, c)
                        else:
                            if mode == TextMode.normal:
                                c = 0
                                super().pixel(px, py, c)
                            if mode == TextMode.rev:
                                c = 1
                                super().pixel(px, py, c)
                        mask = mask << 1
                    w = w + 8
                    i = i + 1
            x = x + width + 1

class Accelerometer():
    """  """

    def __init__(self):
        self.addr = 38
        self.i2c = i2c
        self.i2c.writeto(self.addr, b'\x0F\x08')  # set resolution = 10bit
        self.i2c.writeto(self.addr, b'\x11\x00')  # set power mode = normal

    def get_x(self):
        retry = 0
        if (retry < 5):
            try:
                self.i2c.writeto(self.addr, b'\x02', False)
                buf = self.i2c.readfrom(self.addr, 2)
                x = ustruct.unpack('h', buf)[0]
                return x / 4 / 4096
            except:
                retry = retry + 1
        else:
            raise Exception("i2c read/write error!")

    def get_y(self):
        retry = 0
        if (retry < 5):
            try:
                self.i2c.writeto(self.addr, b'\x04', False)
                buf = self.i2c.readfrom(self.addr, 2)
                y = ustruct.unpack('h', buf)[0]
                return y / 4 / 4096
            except:
                retry = retry + 1
        else:
            raise Exception("i2c read/write error!")

    def get_z(self):
        retry = 0
        if (retry < 5):
            try:
                self.i2c.writeto(self.addr, b'\x06', False)
                buf = self.i2c.readfrom(self.addr, 2)
                z = ustruct.unpack('h', buf)[0]
                return z / 4 / 4096
            except:
                retry = retry + 1
        else:
            raise Exception("i2c read/write error!")


class BME280(object):
    def __init__(self):
        self.addr = 119
        # The “ctrl_hum” register sets the humidity data acquisition options of the device
        # 0x01 = [2:0]oversampling ×1
        i2c.writeto(self.addr, b'\xF2\x01')
        # The “ctrl_meas” register sets the pressure and temperature data acquisition options of the device.
        # The register needs to be written after changing “ctrl_hum” for the changes to become effective.
        # 0x27 = [7:5]Pressure oversampling ×1 | [4:2]Temperature oversampling ×4 | [1:0]Normal mode
        i2c.writeto(self.addr, b'\xF4\x27')
        # The “config” register sets the rate, filter and interface options of the device. Writes to the “config”
        # register in normal mode may be ignored. In sleep mode writes are not ignored.
        i2c.writeto(self.addr, b'\xF5\x00')

        i2c.writeto(self.addr, b'\x88', False)
        bytes = i2c.readfrom(self.addr, 6)
        self.dig_T = ustruct.unpack('Hhh', bytes)

        i2c.writeto(self.addr, b'\x8E', False)
        bytes = i2c.readfrom(self.addr, 18)
        self.dig_P = ustruct.unpack('Hhhhhhhhh', bytes)

        i2c.writeto(self.addr, b'\xA1', False)
        self.dig_H = array.array('h', [0, 0, 0, 0, 0, 0])
        self.dig_H[0] = i2c.readfrom(self.addr, 1)[0]
        i2c.writeto(self.addr, b'\xE1', False)
        buff = i2c.readfrom(self.addr, 7)
        self.dig_H[1] = ustruct.unpack('h', buff[0:2])[0]
        self.dig_H[2] = buff[2]
        self.dig_H[3] = (buff[3] << 4) | (buff[4] & 0x0F)
        self.dig_H[4] = (buff[5] << 4) | (buff[4] >> 4 & 0x0F)
        self.dig_H[5] = buff[6]

    def temperature(self):
        retry = 0
        if (retry < 5):
            try:
                i2c.writeto(self.addr, b'\xFA', False)
                buff = i2c.readfrom(self.addr, 3)
                T = (((buff[0] << 8) | buff[1]) << 4) | (buff[2] >> 4 & 0x0F)
                c1 = (T / 16384.0 - self.dig_T[0] / 1024.0) * self.dig_T[1]
                c2 = ((T / 131072.0 - self.dig_T[0] / 8192.0) * (T / 131072.0 - self.dig_T[0] / 8192.0)) * self.dig_T[2]
                self.tFine = c1 + c2
                return self.tFine / 5120.0
            except:
                retry = retry + 1
        else:
            raise Exception("i2c read/write error!")

    def pressure(self):
        retry = 0
        if (retry < 5):
            try:
                i2c.writeto(self.addr, b'\xF7', False)
                buff = i2c.readfrom(self.addr, 3)
                P = (((buff[0] << 8) | buff[1]) << 4) | (buff[2] >> 4 & 0x0F)
                c1 = self.tFine / 2.0 - 64000.0
                c2 = c1 * c1 * self.dig_P[5] / 32768.0
                c2 = c2 + c1 * self.dig_P[4] * 2.0
                c2 = c2 / 4.0 + self.dig_P[3] * 65536.0
                c1 = (self.dig_P[2] * c1 * c1 / 524288.0 + self.dig_P[1] * c1) / 524288.0
                c1 = (1.0 + c1 / 32768.0) * self.dig_P[0]
                if c1 == 0.0:
                    return 0
                p = 1048576.0 - P
                p = (p - c2 / 4096.0) * 6250.0 / c1
                c1 = self.dig_P[8] * p * p / 2147483648.0
                c2 = p * self.dig_P[7] / 32768.0
                p = p + (c1 + c2 + self.dig_P[6]) / 16.0
                return p
            except:
                retry = retry + 1
        else:
            raise Exception("i2c read/write error!")

    def humidity(self):
        retry = 0
        if (retry < 5):
            try:
                self.temperature()
                i2c.writeto(self.addr, b'\xFD', False)
                buff = i2c.readfrom(self.addr, 2)
                H = buff[0] << 8 | buff[1]
                h = self.tFine - 76800.0
                h = (H - (self.dig_H[3] * 64.0 + self.dig_H[4] / 16384.0 * h)) * \
                    (self.dig_H[1] / 65536.0 * (1.0 + self.dig_H[5] / 67108864.0 * h * \
                    (1.0 + self.dig_H[2] / 67108864.0 * h)))
                h = h * (1.0 - self.dig_H[0] * h / 524288.0)
                if h > 100.0:
                    return 100.0
                elif h < 0.0:
                    return 0.0
                else:
                    return h
            except:
                retry = retry + 1
        else:
            raise Exception("i2c read/write error!")


class PinMode(object):
    IN = 1
    OUT = 2
    PWM = 3
    ANALOG = 4
    OUT_DRAIN = 5


pins_remap_esp32 = (33, 32, 35, 34, 39, 0, 16, 17, 26, 25, 36, 2, -1, 18, 19, 21, 5, -1, -1, 22, 23, -1, -1, 27, 14, 12,
                    13, 15, 4)


class MPythonPin():
    def __init__(self, pin, mode=PinMode.IN, pull=None):
        if mode not in [PinMode.IN, PinMode.OUT, PinMode.PWM, PinMode.ANALOG, PinMode.OUT_DRAIN]:
            raise TypeError("mode must be 'IN, OUT, PWM, ANALOG,OUT_DRAIN'")
        if pin == 4:
            raise TypeError("P4 is used for light sensor")
        if pin == 10:
            raise TypeError("P10 is used for sound sensor")
        try:
            self.id = pins_remap_esp32[pin]
        except IndexError:
            raise IndexError("Out of Pin range")
        if mode == PinMode.IN:
            if pin in [3]:
                raise TypeError('IN not supported on P%d' % pin)
            self.Pin = Pin(self.id, Pin.IN, pull)
        if mode == PinMode.OUT:
            if pin in [2, 3]:
                raise TypeError('OUT not supported on P%d' % pin)
            self.Pin = Pin(self.id, Pin.OUT, pull)
        if mode == PinMode.OUT_DRAIN:
            if pin in [2, 3]:
                raise TypeError('OUT_DRAIN not supported on P%d' % pin)
            self.Pin = Pin(self.id, Pin.OPEN_DRAIN, pull)
        if mode == PinMode.PWM:
            if pin not in [0, 1, 5, 6, 7, 8, 9, 11, 13, 14, 15, 16, 19, 20, 23, 24, 25, 26, 27, 28]:
                raise TypeError('PWM not supported on P%d' % pin)
            self.pwm = PWM(Pin(self.id), duty=0)
        if mode == PinMode.ANALOG:
            if pin not in [0, 1, 2, 3, 4, 10]:
                raise TypeError('ANALOG not supported on P%d' % pin)
            self.adc = ADC(Pin(self.id))
            self.adc.atten(ADC.ATTN_11DB)
        self.mode = mode

    def irq(self, handler=None, trigger=Pin.IRQ_RISING):
        if not self.mode == PinMode.IN:
            raise TypeError('the pin is not in IN mode')
        return self.Pin.irq(handler, trigger)

    def read_digital(self):
        if not self.mode == PinMode.IN:
            raise TypeError('the pin is not in IN mode')
        return self.Pin.value()

    def write_digital(self, value):
        if self.mode not in [PinMode.OUT, PinMode.OUT_DRAIN]:
            raise TypeError('the pin is not in OUT or OUT_DRAIN mode')
        self.Pin.value(value)

    def read_analog(self):
        if not self.mode == PinMode.ANALOG:
            raise TypeError('the pin is not in ANALOG mode')
        # calibration esp32 ADC 
        calibration_val = 0
        val = int(sum([self.adc.read() for i in range(50)]) / 50)
        if 0 < val <= 2855:
            calibration_val = 1.023 * val + 183.6
        if 2855 < val <= 3720:
            calibration_val = 0.9769 * val + 181
        if 3720 < val <= 4095:
            calibration_val = 4095 - (4095 - val) * 0.2
        return calibration_val

    def write_analog(self, duty, freq=1000):
        if not self.mode == PinMode.PWM:
            raise TypeError('the pin is not in PWM mode')
        self.pwm.freq(freq)
        self.pwm.duty(duty)


'''
# to be test
class LightSensor(ADC):
    
    def __init__(self):
        super().__init__(Pin(pins_remap_esp32[4]))
        # super().atten(ADC.ATTN_11DB)
    
    def value(self):
        # lux * k * Rc = N * 3.9/ 4096
        # k = 0.0011mA/Lux
        # lux = N * 3.9/ 4096 / Rc / k
        return super().read() * 1.1 / 4095 / 6.81 / 0.011
    
'''


class wifi:
    def __init__(self):
        self.sta = network.WLAN(network.STA_IF)
        self.ap = network.WLAN(network.AP_IF)

    def connectWiFi(self, ssid, passwd, timeout=10):
        if self.sta.isconnected():
            self.sta.disconnect()
        self.sta.active(True)
        list = self.sta.scan()
        for i, wifi_info in enumerate(list):
            try:
                if wifi_info[0].decode() == ssid:
                    self.sta.connect(ssid, passwd)
                    wifi_dbm = wifi_info[3]
                    break
            except UnicodeError:
                self.sta.connect(ssid, passwd)
                wifi_dbm = '?'
                break
            if i == len(list) - 1:
                raise OSError("SSID invalid / failed to scan this wifi")
        start = time.time()
        print("Connection WiFi", end="")
        while (self.sta.ifconfig()[0] == '0.0.0.0'):
            if time.ticks_diff(time.time(), start) > timeout:
                print("")
                raise OSError("Timeout!,check your wifi password and keep your network unblocked")
            print(".", end="")
            time.sleep_ms(500)
        print("")
        print('WiFi(%s,%sdBm) Connection Successful, Config:%s' % (ssid, str(wifi_dbm), str(self.sta.ifconfig())))

    def disconnectWiFi(self):
        if self.sta.isconnected():
            self.sta.disconnect()
        self.sta.active(False)
        print('disconnect WiFi...')

    def enable_APWiFi(self, essid, channel=10):
        self.ap.active(True)
        self.ap.config(essid=essid, channel=channel)

    def disable_APWiFi(self):
        self.ap.disconnect()
        self.ap.active(False)
        print('disable AP WiFi...')


# display
if 60 in i2c.scan():
    oled = OLED()
    display = oled

# 3 axis accelerometer
accelerometer = Accelerometer()

# bm280
if 119 in i2c.scan():
    bme280 = BME280()

# 3 rgb leds
rgb = NeoPixel(Pin(17, Pin.OUT), 3, 3, 1)
rgb.write()

# light sensor
light = ADC(Pin(39))
light.atten(light.ATTN_11DB)

# sound sensor
sound = ADC(Pin(36))
sound.atten(sound.ATTN_11DB)

# buttons
button_a = Pin(0, Pin.IN, Pin.PULL_UP)
button_b = Pin(2, Pin.IN, Pin.PULL_UP)

# touchpad
touchPad_P = TouchPad(Pin(27))
touchPad_Y = TouchPad(Pin(14))
touchPad_T = TouchPad(Pin(12))
touchPad_H = TouchPad(Pin(13))
touchPad_O = TouchPad(Pin(15))
touchPad_N = TouchPad(Pin(4))

from gui import *


def numberMap(inputNum, bMin, bMax, cMin, cMax):
    outputNum = 0
    outputNum = ((cMax - cMin) / (bMax - bMin)) * (inputNum - bMin) + cMin
    return outputNum