rds-song.py

#!/usr/bin/env python3

import time
import argparse   
import sys

import bb_I2C
import pigpio

if len(sys.argv) == 1:
   sys.exit ("The total numbers of arguments passed is 1.\nRun the app with the -h command for help.")

parser = argparse.ArgumentParser(description='RDS Setting Application')
parser.add_argument('-c','--change', help='Input station name (8 characters max)', required=False)
parser.add_argument('-s','--song',help='Song name', required=False)
parser.add_argument('-l','--liststation', help='Print out the station id', required=False, action="store_true")
parser.add_argument('-n','--nowplaying', help='Print out current radiotext', required=False, action="store_true")
parser.add_argument('-i','--install', help='Run the first time you install to turn off Dynamic PS', required=False, action="store_true")
parser.add_argument('-w','--write',help='Write to memory', required=False, action="store_true")
args = parser.parse_args()

pi = pigpio.pi()

s = bb_I2C.I2C(pi, 23, 24, 600)

if args.change:
   #we have a station name to change
   #So...Set name of radio station
   if len(args.change) >=9:
      sys.exit ("The station name has to be 8 characters or less")
   stationname = args.change
   stationname = stationname.ljust(8,' ')
   s.S()
   s.TX(214)
   s.TX(2)
   for x in range(0, 8):
      # print " %d" % ord(stationname[x])
      s.TX(ord(stationname[x]))
   s.E()
   print( "Station name changed to: %s" % stationname)

if args.install:
   #Store settings to eeprom
   print ("Setting dynamic PS to off and saving eeprom...")
   # turn off dynamic PS because it's bad (although EDM has it on by default - http://www.rds.org.uk/2010/Usage-of-PS.htm)
   s.S()
   s.TX(214)
   s.TX(0x76)
   s.TX(0)
   s.E()
   s.S()
   s.TX(214)
   s.TX(0x71)
   s.TX(0x45)
   s.E()
   print ("Settings saved to EEPROM")

if args.song:
   #we have to change the song title playing
   if len(args.song) >=64:
      sys.exit ("The song has to be 64 characters or less")
   radiotext = args.song
   radiotext = radiotext.ljust(64,' ')
   s.S()
   s.TX(214)
   s.TX(0x20)
   for x in range(0, 64):
      # print " %d" % ord(radiotext[x])
      s.TX(ord(radiotext[x]))
   s.E()
   print ("Radiotext changed to: %s" % radiotext)

if args.liststation:
   #print out the radio station id
   s.S()
   s.TX(214)
   s.TX(2)  #0x77 is for Dynamic PS 0x20 is RT
   s.S()
   s.TX(215)
   number1 = s.RX(1) #1 = ack, 0-nack
   number2 = s.RX(1)
   number3 = s.RX(1)
   number4 = s.RX(1)
   number5 = s.RX(1)
   number6 = s.RX(1)
   number7 = s.RX(1)
   number8 = s.RX(0)
   print( '%s%s%s%s%s%s%s%s' %(chr(number1) , chr(number2) , chr(number3), chr(number4) , chr(number5) , chr(number6), chr(number7) , chr(number8)))
   s.E()

if args.nowplaying:
   #print out the current radio text information
   radiotext = ""
   s.S()
   s.TX(214)
   s.TX(0x20)
   s.S()
   s.TX(215)
   for x in range(0, 63):
      #print " %s" % chr(s.RX(1))
      radiotext = radiotext + chr(s.RX(1))
   radiotext = radiotext + chr(s.RX(0))
   s.E()

   print ("%s" % radiotext)


if args.write:
   #Store settings to eeprom
   print ("Saving...")
   s.S()
   s.TX(214)
   s.TX(0x71)
   s.TX(0x45)
   s.E()
   print ("Settings saved to EEPROM")

# print ("Station Name: %s" % args.change )
# print ("Song: %s" % args.song )
# print ("Write on?: %s" % args.write )

###
# Configuration of the MiniRDS as per http://www.edmdesign.com/docs/EDM-TX-RDS.pdf
# Address information and valudes found from http://pira.cz/rds/mrds192.pdf
# Step 1: Set PTY Coding
# PTY Coding (set for US)
# PTY Flag is set when we do a write to EEPROM as we would never change this otherwise!
# PTY = program type = 0x0A = value of 2 which is Information
# Step 2: Set Subcarier phase shift to 85.23 degrees, Clock source Auto(stero), PLL Lock Range 19000+/- 5Hz
# Step 3: Set PS name
# Step 4: Set Radio text
# Dyanmic PS is also used by default
###


   ###
   # This is an example of how to read a byte of data
   #s.S()
   #s.TX(214)
   #s.TX(0x22)
   #s.S()
   #s.TX(215)
   #print(s.RX(0))
   #print 'Got new device: %s' % chr(79)
   #s.E()
   ###
   ###
 
   #Set name of radio station
   #s.S()
   #s.TX(214)
   #s.TX(02)
   #s.TX(ord('X'))
   #s.TX(ord('M'))
   #s.TX(ord('A'))
   #s.TX(ord('S'))
   # s.TX(ord('M'))
   #s.TX(ord('U'))
   #s.TX(ord('Z'))
   #s.TX(ord('K'))
   #s.E()

   #Store to eeprom
   #s.S()
   #s.TX(214)
   #s.TX(0x71)
   #s.TX(0x45)
   #s.E()

s.cancel()
pi.stop()