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pin.py
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pin.py
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import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM) # Use BCM pins D4 = GPIO #4
GPIO.setwarnings(False) # shh!
# Pins dont exist in CPython so...lets make our own!
class Pin:
IN = 0
OUT = 1
LOW = 0
HIGH = 1
PULL_NONE = 0
PULL_UP = 1
PULL_DOWN = 2
id = None
_value = LOW
_mode = IN
def __init__(self, bcm_number):
self.id = bcm_number
def __repr__(self):
return str(self.id)
def __eq__(self, other):
return self.id == other
def init(self, mode=IN, pull=None):
if mode != None:
if mode == self.IN:
self._mode = self.IN
GPIO.setup(self.id, GPIO.IN)
elif mode == self.OUT:
self._mode = self.OUT
GPIO.setup(self.id, GPIO.OUT)
else:
raise RuntimeError("Invalid mode for pin: %s" % self.id)
if pull != None:
if self._mode != self.IN:
raise RuntimeError("Cannot set pull resistor on output")
if pull == self.PULL_UP:
GPIO.setup(self.id, GPIO.IN, pull_up_down=GPIO.PUD_UP)
elif pull == self.PULL_DOWN:
GPIO.setup(self.id, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
else:
raise RuntimeError("Invalid pull for pin: %s" % self.id)
def value(self, val=None):
if val != None:
if val == self.LOW:
self._value = val
GPIO.output(self.id, val)
elif val == self.HIGH:
self._value = val
GPIO.output(self.id, val)
else:
raise RuntimeError("Invalid value for pin")
else:
return GPIO.input(self.id)
# Pi 1B rev1 only?
D0 = Pin(0)
D1 = Pin(1)
D2 = Pin(2)
SDA = Pin(2)
D3 = Pin(3)
SCL = Pin(3)
D4 = Pin(4)
D5 = Pin(5)
D6 = Pin(6)
D7 = Pin(7)
CE1 = Pin(7)
D8 = Pin(8)
CE0 = Pin(8)
D9 = Pin(9)
MISO = Pin(9)
D10 = Pin(10)
MOSI = Pin(10)
D11 = Pin(11)
SCLK = Pin(11) # Raspberry Pi naming
SCK = Pin(11) # CircuitPython naming
D12 = Pin(12)
D13 = Pin(13)
D14 = Pin(14)
TXD = Pin(14)
D15 = Pin(15)
RXD = Pin(15)
D16 = Pin(16)
D17 = Pin(17)
D18 = Pin(18)
D19 = Pin(19)
MISO_1 = Pin(19)
D20 = Pin(20)
MOSI_1 = Pin(20)
D21 = Pin(21)
SCLK_1 = Pin(21)
SCK_1 = Pin(21)
D22 = Pin(22)
D23 = Pin(23)
D24 = Pin(24)
D25 = Pin(25)
D26 = Pin(26)
D27 = Pin(27)
# ordered as spiId, sckId, mosiId, misoId
spiPorts = ((0, SCLK, MOSI, MISO), (1, SCLK_1, MOSI_1, MISO_1))
# ordered as uartId, txId, rxId
uartPorts = (
(1, TXD, RXD),
)
i2cPorts = (
(1, SCL, SDA), (0, D1, D0), # both pi 1 and pi 2 i2c ports!
)