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gpio_pins.py
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gpio_pins.py
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# -*- coding: utf-8 -*-
import gv
try:
import RPi.GPIO as GPIO
gv.platform = 'pi'
rev = GPIO.RPI_REVISION
if rev == 1:
# map 26 physical pins (1based) with 0 for pins that do not have a gpio number
if gv.use_pigpio:
gv.pin_map = [0,0,0,0,0,1,0,4,14,0,15,17,18,21,0,22,23,0,24,10,0,9,25,11,8,0,7]
else:
gv.pin_map = [0,0,0,0,0,5,0,7,8,0,10,11,12,13,0,15,16,0,18,19,0,21,22,23,24,0,26]
elif rev == 2:
# map 26 physical pins (1based) with 0 for pins that do not have a gpio number
if gv.use_pigpio:
gv.pin_map = [0,0,0,2,0,3,0,4,14,0,15,17,18,27,0,22,23,0,24,10,0,9,25,11,8,0,7]
else:
gv.pin_map = [0,0,0,0,0,5,0,7,8,0,10,11,12,13,0,15,16,0,18,19,0,21,22,23,24,0,26]
elif rev == 3:
# map 40 physical pins (1based) with 0 for pins that do not have a gpio number
if gv.use_pigpio:
gv.pin_map = [0,0,0,2,0,3,0,4,14,0,15,17,18,27,0,22,23,0,24,10,0,9,25,11,8,0,7,0,0,5,0,6,12,13,0,19,16,26,20,0,21]
else:
gv.pin_map = [0,0,0,3,0,5,0,7,8,0,10,11,12,13,0,15,16,0,18,19,0,21,22,23,24,0,26,0,0,29,0,31,32,33,0,35,36,37,38,0,40]
else:
print 'Unknown pi pin revision. Using pin mapping for rev 3'
except ImportError:
try:
import Adafruit_BBIO.GPIO as GPIO # Required for accessing General Purpose Input Output pins on Beagle Bone Black
gv.pin_map = [None]*11 # map only the pins we are using
gv.pin_map.extend(['P9_'+str(i) for i in range(11,17)])
gv.platform = 'bo'
except ImportError:
gv.pin_map = [i for i in range(27)] # assume 26 pins all mapped. Maybe we should not assume anything, but...
gv.platform = '' # if no platform, allows program to still run.
print 'No GPIO module was loaded from GPIO Pins module'
from blinker import signal
zone_change = signal('zone_change')
try:
if gv.use_pigpio:
import pigpio
pi = pigpio.pi()
else:
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD) #IO channels are identified by header connector pin numbers. Pin numbers are
except Exception:
pass
global pin_rain_sense
global pin_relay
try:
if gv.platform == 'pi': # If this will run on Raspberry Pi:
GPIO.setmode(GPIO.BOARD)
pin_rain_sense = gv.pin_map[8]
pin_relay = gv.pin_map[10]
elif gv.platform == 'bo': # If this will run on Beagle Bone Black:
pin_rain_sense = gv.pin_map[15]
pin_relay = gv.pin_map[16]
except AttributeError:
pass
try:
if gv.use_pigpio:
pi.set_mode(pin_rain_sense, pigpio.INPUT)
pi.set_mode(pin_relay, pigpio.OUTPUT)
else:
GPIO.setup(pin_rain_sense, GPIO.IN)
GPIO.setup(pin_relay, GPIO.OUT)
except NameError:
pass
def setup_pins():
"""
Define and setup GPIO pins for shift register operation
"""
global pin_sr_dat
global pin_sr_clk
global pin_sr_noe
global pin_sr_lat
global pi
try:
if gv.platform == 'pi': # If this will run on Raspberry Pi:
if not gv.use_pigpio:
GPIO.setmode(GPIO.BOARD) # IO channels are identified by header connector pin numbers. Pin numbers are always the same regardless of Raspberry Pi board revision.
pin_sr_dat = gv.pin_map[13]
pin_sr_clk = gv.pin_map[7]
pin_sr_noe = gv.pin_map[11]
pin_sr_lat = gv.pin_map[15]
elif gv.platform == 'bo': # If this will run on Beagle Bone Black:
pin_sr_dat = gv.pin_map[11]
pin_sr_clk = gv.pin_map[13]
pin_sr_noe = gv.pin_map[14]
pin_sr_lat = gv.pin_map[12]
except AttributeError:
pass
#### setup GPIO pins as output or input ####
try:
if gv.use_pigpio:
pi.set_mode(pin_sr_noe, pigpio.OUTPUT)
pi.set_mode(pin_sr_clk, pigpio.OUTPUT)
pi.set_mode(pin_sr_dat, pigpio.OUTPUT)
pi.set_mode(pin_sr_lat, pigpio.OUTPUT)
pi.write(pin_sr_noe, 1)
pi.write(pin_sr_clk, 0)
pi.write(pin_sr_dat, 0)
pi.write(pin_sr_lat, 0)
else:
GPIO.setup(pin_sr_noe, GPIO.OUT)
GPIO.setup(pin_sr_clk, GPIO.OUT)
GPIO.setup(pin_sr_dat, GPIO.OUT)
GPIO.setup(pin_sr_lat, GPIO.OUT)
GPIO.output(pin_sr_noe, GPIO.HIGH)
GPIO.output(pin_sr_clk, GPIO.LOW)
GPIO.output(pin_sr_dat, GPIO.LOW)
GPIO.output(pin_sr_lat, GPIO.LOW)
except NameError:
pass
def disableShiftRegisterOutput():
"""Disable output from shift register."""
global pi
try:
pin_sr_noe
except NameError:
if gv.use_gpio_pins:
setup_pins()
try:
if gv.use_pigpio:
pi.write(pin_sr_noe, 1)
else:
GPIO.output(pin_sr_noe, GPIO.HIGH)
except Exception:
pass
def enableShiftRegisterOutput():
"""Enable output from shift register."""
global pi
try:
if gv.use_pigpio:
pi.write(pin_sr_noe, 0)
else:
GPIO.output(pin_sr_noe, GPIO.LOW)
except Exception:
pass
def setShiftRegister(srvals):
"""Set the state of each output pin on the shift register from the srvals list."""
global pi
try:
if gv.use_pigpio:
pi.write(pin_sr_clk, 0)
pi.write(pin_sr_lat, 0)
for s in range(gv.sd['nst']):
pi.write(pin_sr_clk, 0)
if srvals[gv.sd['nst']-1-s]:
pi.write(pin_sr_dat, 1)
else:
pi.write(pin_sr_dat, 0)
pi.write(pin_sr_clk, 1)
pi.write(pin_sr_lat, 1)
else:
GPIO.output(pin_sr_clk, GPIO.LOW)
GPIO.output(pin_sr_lat, GPIO.LOW)
for s in range(gv.sd['nst']):
GPIO.output(pin_sr_clk, GPIO.LOW)
if srvals[gv.sd['nst']-1-s]:
GPIO.output(pin_sr_dat, GPIO.HIGH)
else:
GPIO.output(pin_sr_dat, GPIO.LOW)
GPIO.output(pin_sr_clk, GPIO.HIGH)
GPIO.output(pin_sr_lat, GPIO.HIGH)
except Exception:
pass
def set_output():
"""Activate triacs according to shift register state."""
with gv.output_srvals_lock:
gv.output_srvals = gv.srvals
disableShiftRegisterOutput()
setShiftRegister(gv.output_srvals) # gv.srvals stores shift register state
enableShiftRegisterOutput()
zone_change.send()