wiring.py

#!/usr/bin/env python
#
# Raspberry Pi Internet Radio
# This program produces a wiring diagram based on the 
#      configuration in the /etc/radiod.conf file

# $Id: wiring.py,v 1.8 2017/03/08 09:57:07 bob Exp $
#
# Author : Bob Rathbone
# Site   : http://www.bobrathbone.com
#
# License: GNU V3, See https://www.gnu.org/copyleft/gpl.html
#
# Disclaimer: Software is provided as is and absolutly no warranties are implied or given.
#            The authors shall not be liable for any loss or damage however caused.
#

import os
import sys
import commands

from config_class import Configuration

config = Configuration()
bootconfig = "/boot/config.txt"

switch_labels = [ "left_switch",
		  "right_switch",
		  "GND_0V",
		  "mute_switch",
		  "down_switch",
		  "up_switch",
		  "GND_0V",
		  "menu_switch",
		]

switch_details = { "left_switch": 'A',
		   "right_switch": 'B',
		   "GND_0V": 'C',
		   "mute_switch": '< GND 0V',
		   "down_switch": 'A',
		   "up_switch": 'B',
		   "menu_switch": '< GND 0V',
		 }

lcd_labels = [  'lcd_data4',
		'lcd_data5',
		'lcd_data6',
		'lcd_data7',
		'lcd_enable',
		'lcd_select',
	     ]

lcd_pins = {    'lcd_data4': 11,
		'lcd_data5': 12,
		'lcd_data6': 13,
		'lcd_data7': 14,
		'lcd_enable': 6,
		'lcd_select': 4,
	     }

other_labels = ['remote_led',
		'I2C_Data',
		'I2C_Clock',
		'IR_Remote',
	     ]


# GPIO to Physical pins translation Format: <gpio>:<pysical pin>
pins = { 0:6, 2:3, 3:5, 4:7, 5:29, 6:31, 7:26, 8:24, 9:21, 10:19, 
	11:23, 12:32, 13:33, 14:8, 15:10, 16:36, 17:11, 18:12, 19:35, 
	20:38, 21:40, 22:15, 23:16, 24:18, 25:22, 26:37, 27:13,  }

# Display the Switch wiring
def displaySwitch(config,params):
	print '--------------- SWITCHES ----------------'
	print "GPIO","\tPin\t    Switch\t   Rotary"
	print "====","\t===\t    ======\t   ======"
	for label in switch_labels:
		pin = 0
		gpio = 0
		if label is not 'GND_0V':
			gpio = config.getSwitchGpio(label)
		rotary = switch_details[label]
		try:
			pin = pins[gpio]
			if not params:
				label = label.replace('_', ' ')
				label = label.capitalize()
			print " %2.d\t%2.d <------> %-12s   %s" % (gpio, pin, label, rotary)
		except:
			print "Invalid GPIO", label + '=' + str(gpio)
	print
	print "Button switches must be wired to 3.3V"
	print "Rotary push switches must be wired to GND 0V"
	print
	return

# Display the LCD wiring
def displayLCD(config,params):
	print '----------------- LCD ------------------'
	print "GPIO","\tPin\t    Function\tLCD pin"
	print "====","\t===\t    ========\t======="
	for label in lcd_labels:
		pin = 0
		gpio = 0
		#if label is not 'GND_0V' or label is not 'LCD Contrast':
		gpio = config.getLcdGpio(label)
		lcd_pin = lcd_pins[label]
		try:
			pin = pins[gpio]
			if not params:
				label = label.replace('_', ' ')
				label = label.capitalize()
			print " %2.d\t%2.d <------> %-12s %2d" % (gpio, pin, label, lcd_pin)
		except:
			print "Invalid GPIO", label + '=' + str(gpio)
		
	pin = 2
	label = 'VCC +5V'	
	print " \t%2.d <------> %-12s  %s" % (pin, label, '2,15')
	pin = 6
	label = 'GND 0V'	
	print " \t%2.d <------> %-12s  %s" % (pin, label, '1,16')
	label = 'Contrast'	
	print " 10K Pot   <------> %-12s  %d" % (label, 3)
	print
	return

# Get lirc configuration from boot.txt
def getLircGpio():
	cmd = "grep lirc " + bootconfig + " | grep gpio | awk -F ',' '{print $2}'"
	x = commands.getstatusoutput(cmd)
	x = x[1]
	x = x.replace('gpio_in_pin=', '' )
	try:
		gpio = int(x)
	except:
		gpio = -1
	return gpio


def displayOther(config,params):
	print '----------- OTHER ------------'
	print "GPIO","\tPin\t    Function"
	print "====","\t===\t    ========"
	for label in other_labels:
		pin = 0
		gpio = 0
		comment = ''
		if label is 'remote_led':
			gpio = config.getRemoteLed()
			if not params:
				label = label.capitalize()
		elif label is 'I2C_Clock':
			gpio = 2 
		elif label is 'I2C_Data':
			gpio = 3 
		elif label is 'IR_Remote':
			gpio = getLircGpio()
			comment = "(See " + bootconfig + ")"

		try:
			if gpio > 0:
				pin = pins[gpio]
				if not params:
					label = label.replace('_', ' ')
				print " %2.d\t%2.d <------> %-12s %s" % (gpio, pin, label, comment)
		except:
			print "Invalid GPIO", label + '=' + str(gpio)
	print
	return

def usage():
	print "Usage: %s -p -h" % (sys.argv[0])
	print "Where -p print parameters, -h this help text"
	sys.exit(0)

# Main program

params = False 
if len(sys.argv) > 1:
	if  '-p'== sys.argv[1] :
		params = True
	elif '-h' == sys.argv[1]:
		usage()
	else:
		usage()

print "Radio wiring scheme based upon configuration in /etc/radiod.conf"
print

displaySwitch(config,params)
displayLCD(config,params)
displayOther(config,params)


# End of program