159 lines
3.4 KiB
Python
159 lines
3.4 KiB
Python
# SPDX-FileCopyrightText: 2021 Melissa LeBlanc-Williams for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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"""Broadcom BCM283x pin names"""
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from RPi import GPIO
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GPIO.setmode(GPIO.BCM) # Use BCM pins D4 = GPIO #4
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GPIO.setwarnings(False) # shh!
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class Pin:
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"""Pins dont exist in CPython so...lets make our own!"""
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IN = 0
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OUT = 1
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LOW = 0
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HIGH = 1
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PULL_NONE = 0
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PULL_UP = 1
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PULL_DOWN = 2
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id = None
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_value = LOW
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_mode = IN
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def __init__(self, bcm_number):
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self.id = bcm_number
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def __repr__(self):
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return str(self.id)
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def __eq__(self, other):
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return self.id == other
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def init(self, mode=IN, pull=None):
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"""Initialize the Pin"""
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if mode is not None:
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if mode == self.IN:
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self._mode = self.IN
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GPIO.setup(self.id, GPIO.IN)
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elif mode == self.OUT:
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self._mode = self.OUT
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GPIO.setup(self.id, GPIO.OUT)
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else:
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raise RuntimeError("Invalid mode for pin: %s" % self.id)
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if pull is not None:
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if self._mode != self.IN:
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raise RuntimeError("Cannot set pull resistor on output")
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if pull == self.PULL_UP:
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GPIO.setup(self.id, GPIO.IN, pull_up_down=GPIO.PUD_UP)
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elif pull == self.PULL_DOWN:
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GPIO.setup(self.id, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
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else:
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raise RuntimeError("Invalid pull for pin: %s" % self.id)
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def value(self, val=None):
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"""Set or return the Pin Value"""
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if val is not None:
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if val == self.LOW:
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self._value = val
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GPIO.output(self.id, val)
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elif val == self.HIGH:
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self._value = val
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GPIO.output(self.id, val)
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else:
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raise RuntimeError("Invalid value for pin")
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return None
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return GPIO.input(self.id)
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# Pi 1B rev1 only?
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D0 = Pin(0)
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D1 = Pin(1)
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D2 = Pin(2)
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SDA = Pin(2)
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D3 = Pin(3)
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SCL = Pin(3)
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D4 = Pin(4)
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D5 = Pin(5)
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D6 = Pin(6)
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D7 = Pin(7)
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CE1 = Pin(7)
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D8 = Pin(8)
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CE0 = Pin(8)
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D9 = Pin(9)
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MISO = Pin(9)
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D10 = Pin(10)
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MOSI = Pin(10)
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D11 = Pin(11)
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SCLK = Pin(11) # Raspberry Pi naming
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SCK = Pin(11) # CircuitPython naming
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D12 = Pin(12)
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D13 = Pin(13)
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D14 = Pin(14)
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TXD = Pin(14)
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D15 = Pin(15)
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RXD = Pin(15)
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D16 = Pin(16)
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D17 = Pin(17)
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D18 = Pin(18)
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D19 = Pin(19)
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MISO_1 = Pin(19)
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D20 = Pin(20)
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MOSI_1 = Pin(20)
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D21 = Pin(21)
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SCLK_1 = Pin(21)
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SCK_1 = Pin(21)
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D22 = Pin(22)
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D23 = Pin(23)
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D24 = Pin(24)
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D25 = Pin(25)
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D26 = Pin(26)
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D27 = Pin(27)
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D28 = Pin(28)
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D29 = Pin(29)
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D30 = Pin(30)
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D31 = Pin(31)
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D32 = Pin(32)
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D33 = Pin(33)
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D34 = Pin(34)
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D35 = Pin(35)
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D36 = Pin(36)
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D37 = Pin(37)
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D38 = Pin(38)
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D39 = Pin(39)
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D40 = Pin(40)
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MISO_2 = Pin(40)
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D41 = Pin(41)
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MOSI_2 = Pin(41)
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D42 = Pin(42)
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SCLK_2 = Pin(42)
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SCK_2 = Pin(43)
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D43 = Pin(43)
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D44 = Pin(44)
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D45 = Pin(45)
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# ordered as spiId, sckId, mosiId, misoId
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spiPorts = (
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(0, SCLK, MOSI, MISO),
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(1, SCLK_1, MOSI_1, MISO_1),
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(2, SCLK_2, MOSI_2, MISO_2),
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)
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# ordered as uartId, txId, rxId
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uartPorts = ((1, TXD, RXD),)
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# These are the known hardware I2C ports / pins.
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# For software I2C ports created with the i2c-gpio overlay, see:
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# https://github.com/adafruit/Adafruit_Python_Extended_Bus
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i2cPorts = (
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(1, SCL, SDA),
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(0, D1, D0), # both pi 1 and pi 2 i2c ports!
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)
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