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radio.py
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radio.py
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#!/usr/bin/python
# The wiring for the LCD is as follows:
# 1 : GND
# 2 : 5V
# 3 : Contrast (0-5V)*
# 4 : RS (Register Select)
# 5 : R/W (Read Write) - GROUND THIS PIN! We do not want the LCD to send anything to the Pi @ 5v
# 6 : Enable or Strobe
# 7 : Data Bit 0 - NOT USED
# 8 : Data Bit 1 - NOT USED
# 9 : Data Bit 2 - NOT USED
# 10: Data Bit 3 - NOT USED
# 11: Data Bit 4
# 12: Data Bit 5
# 13: Data Bit 6
# 14: Data Bit 7
# 15: LCD Backlight +5V
# 16: LCD Backlight GND (Red)
# 17: LCD Backlight GND (Green)
# 18: LCD Backlight GND (Blue)
#import
import RPi.GPIO as GPIO
import time
import os
import datetime
# Define GPIO to LCD mapping
LCD_RS = 25
LCD_E = 24
LCD_D4 = 23
LCD_D5 = 17
LCD_D6 = 27
LCD_D7 = 22
# Defomte GPIO for Radio Controls
NEXT = 18
PREV = 4
# Define some device constants
LCD_WIDTH = 20 # Maximum characters per line
LCD_CHR = True
LCD_CMD = False
LCD_LINE_1 = 0x80 # LCD RAM address for the 1st line
LCD_LINE_2 = 0xC0 # LCD RAM address for the 2nd line
LCD_LINE_3 = 0x94 # LCD RAM address for the 3rd line
LCD_LINE_4 = 0xD4 # LCD RAM address for the 4th line
# Timing constants
E_PULSE = 0.00005
E_DELAY = 0.00005
def main():
# Main program block
GPIO.setmode(GPIO.BCM) # Use BCM GPIO numbers
GPIO.setup(LCD_E, GPIO.OUT) # E
GPIO.setup(LCD_RS, GPIO.OUT) # RS
GPIO.setup(LCD_D4, GPIO.OUT) # DB4
GPIO.setup(LCD_D5, GPIO.OUT) # DB5
GPIO.setup(LCD_D6, GPIO.OUT) # DB6
GPIO.setup(LCD_D7, GPIO.OUT) # DB7
GPIO.setup(NEXT, GPIO.IN) # Next Channel button
GPIO.setup(PREV, GPIO.IN) # Previous Channel button
# Initialise display
lcd_init()
lcd_byte(LCD_LINE_1, LCD_CMD)
lcd_string("",2)
lcd_byte(LCD_LINE_2, LCD_CMD)
lcd_string("",2)
lcd_byte(LCD_LINE_3, LCD_CMD)
lcd_string("",2)
lcd_byte(LCD_LINE_4, LCD_CMD)
lcd_string("", 2)
time.sleep(0.1)
currentTrack = 5
currentName = ["Error","OuiFM ","FIP ","France Inter ","France Culture "]
os.system("mpc play %d" % (currentTrack, ))
time.sleep(1)
while 1:
if ( GPIO.input(NEXT) == False):
currentTrack = currentTrack + 1
if ( currentTrack >= 8 ):
currentTrack = 1
if ( currentTrack == 7 ):
os.system("mpc stop")
else:
os.system("mpc play %d" % (currentTrack, ))
if ( GPIO.input(PREV) == False):
currentTrack = currentTrack - 1
if ( currentTrack <= 0 ):
currentTrack = 7
if ( currentTrack == 7 ):
os.system("mpc stop")
else:
os.system("mpc play %d" % (currentTrack, ))
# Send some text
if ( currentTrack == 1 ):
lcd_byte(LCD_LINE_1, LCD_CMD)
lcd_string(datetime.datetime.now().strftime('%H:%M OuiFM Rock <'),3)
lcd_byte(LCD_LINE_2, LCD_CMD)
lcd_string("Nova ",3)
lcd_byte(LCD_LINE_3, LCD_CMD)
lcd_string("France Inter ",3)
lcd_byte(LCD_LINE_4, LCD_CMD)
lcd_string("France Culture ",3)
elif ( currentTrack == 2 ):
lcd_byte(LCD_LINE_1, LCD_CMD)
lcd_string(datetime.datetime.now().strftime('%H:%M OuiFM Rock '),3)
lcd_byte(LCD_LINE_2, LCD_CMD)
lcd_string("Nova <",3)
lcd_byte(LCD_LINE_3, LCD_CMD)
lcd_string("France Inter ",3)
lcd_byte(LCD_LINE_4, LCD_CMD)
lcd_string("France Culture ",3)
elif ( currentTrack == 3 ):
lcd_byte(LCD_LINE_1, LCD_CMD)
lcd_string(datetime.datetime.now().strftime('%H:%M OuiFM Rock '),3)
lcd_byte(LCD_LINE_2, LCD_CMD)
lcd_string("Nova ",3)
lcd_byte(LCD_LINE_3, LCD_CMD)
lcd_string("France Inter <",3)
lcd_byte(LCD_LINE_4, LCD_CMD)
lcd_string("France Culture ",3)
elif ( currentTrack == 4 ):
lcd_byte(LCD_LINE_1, LCD_CMD)
lcd_string(datetime.datetime.now().strftime('%H:%M OuiFM Rock '),3)
lcd_byte(LCD_LINE_2, LCD_CMD)
lcd_string("Nova ",3)
lcd_byte(LCD_LINE_3, LCD_CMD)
lcd_string("France Inter ",3)
lcd_byte(LCD_LINE_4, LCD_CMD)
lcd_string("France Culture <",3)
elif ( currentTrack == 5 ):
lcd_byte(LCD_LINE_1, LCD_CMD)
lcd_string(datetime.datetime.now().strftime('%H:%M Nova '),3)
lcd_byte(LCD_LINE_2, LCD_CMD)
lcd_string("France Inter ",3)
lcd_byte(LCD_LINE_3, LCD_CMD)
lcd_string("France Culture ",3)
lcd_byte(LCD_LINE_4, LCD_CMD)
lcd_string("OuiFM <",3)
elif ( currentTrack == 6 ):
lcd_byte(LCD_LINE_1, LCD_CMD)
lcd_string(datetime.datetime.now().strftime('%H:%M France Inter '),3)
lcd_byte(LCD_LINE_2, LCD_CMD)
lcd_string("France Culture ",3)
lcd_byte(LCD_LINE_3, LCD_CMD)
lcd_string("OuiFM ",3)
lcd_byte(LCD_LINE_4, LCD_CMD)
lcd_string("Fip <",3)
elif ( currentTrack == 7 ):
lcd_byte(LCD_LINE_1, LCD_CMD)
lcd_string(datetime.datetime.now().strftime('%H:%M OFF/AirPlay <'),3)
lcd_byte(LCD_LINE_2, LCD_CMD)
lcd_string("OuiFM Rock ",3)
lcd_byte(LCD_LINE_3, LCD_CMD)
lcd_string("Nova ",3)
lcd_byte(LCD_LINE_4, LCD_CMD)
lcd_string("France Inter ",3)
else:
lcd_byte(LCD_LINE_1, LCD_CMD)
lcd_string(datetime.datetime.now().strftime('%H:%M ERROR '),3)
lcd_byte(LCD_LINE_2, LCD_CMD)
lcd_string(" ",3)
lcd_byte(LCD_LINE_3, LCD_CMD)
lcd_string(" ",3)
lcd_byte(LCD_LINE_4, LCD_CMD)
lcd_string(" ",3)
time.sleep(0.2)
# f=os.popen("mpc current")
# station = ""
# for i in f.readlines():
# station += i
#
#
#
# # Send some text
# lcd_byte(LCD_LINE_1, LCD_CMD)
# lcd_string(datetime.datetime.now().strftime('%H:%M '),2)
# lcd_byte(LCD_LINE_2, LCD_CMD)
# lcd_string("",2)
# lcd_byte(LCD_LINE_3, LCD_CMD)
# lcd_string("",1)
# lcd_byte(LCD_LINE_4, LCD_CMD)
# lcd_string(currentName[currentTrack],1)
# time.sleep(1)
time.sleep(20)
def lcd_init():
# Initialise display
lcd_byte(0x33,LCD_CMD)
lcd_byte(0x32,LCD_CMD)
lcd_byte(0x28,LCD_CMD)
lcd_byte(0x0C,LCD_CMD)
lcd_byte(0x06,LCD_CMD)
lcd_byte(0x01,LCD_CMD)
def lcd_string(message,style):
# Send string to display
# style=1 Left justified
# style=2 Centred
# style=3 Right justified
if style==1:
message = message.ljust(LCD_WIDTH," ")
elif style==2:
message = message.center(LCD_WIDTH," ")
elif style==3:
message = message.rjust(LCD_WIDTH," ")
for i in range(LCD_WIDTH):
lcd_byte(ord(message[i]),LCD_CHR)
def lcd_byte(bits, mode):
# Send byte to data pins
# bits = data
# mode = True for character
# False for command
GPIO.output(LCD_RS, mode) # RS
# High bits
GPIO.output(LCD_D4, False)
GPIO.output(LCD_D5, False)
GPIO.output(LCD_D6, False)
GPIO.output(LCD_D7, False)
if bits&0x10==0x10:
GPIO.output(LCD_D4, True)
if bits&0x20==0x20:
GPIO.output(LCD_D5, True)
if bits&0x40==0x40:
GPIO.output(LCD_D6, True)
if bits&0x80==0x80:
GPIO.output(LCD_D7, True)
# Toggle 'Enable' pin
time.sleep(E_DELAY)
GPIO.output(LCD_E, True)
time.sleep(E_PULSE)
GPIO.output(LCD_E, False)
time.sleep(E_DELAY)
# Low bits
GPIO.output(LCD_D4, False)
GPIO.output(LCD_D5, False)
GPIO.output(LCD_D6, False)
GPIO.output(LCD_D7, False)
if bits&0x01==0x01:
GPIO.output(LCD_D4, True)
if bits&0x02==0x02:
GPIO.output(LCD_D5, True)
if bits&0x04==0x04:
GPIO.output(LCD_D6, True)
if bits&0x08==0x08:
GPIO.output(LCD_D7, True)
# Toggle 'Enable' pin
time.sleep(E_DELAY)
GPIO.output(LCD_E, True)
time.sleep(E_PULSE)
GPIO.output(LCD_E, False)
time.sleep(E_DELAY)
if __name__ == '__main__':
main()