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Instruction Guide LCD/OLED display using pydPiper
#31
Hi, Remy,
wow, what a great work. the installation routine worked perfect... and just found the solution for the wrong time problem.
unfortunatly there is no indication for title and so on if i stream from spotify to moode directl.
Any hint?
best wishes for 1. Advent
Matthias
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#32
Hi Remy,

Having a 16x2 LCD display up and running I thought I would try an OLED panel.

I found a 0.96inch 128x64 12c SSD1306 panel but it has a reset pin in addition to the usual Vcc, Gnd, SCL and SDA pins.

Datasheet link - http://www.tinyosshop.com/datasheet/Tiny...Manual.pdf

I could not see a reference to a reset pin in pydPiper. Do you think this display will work with moOde or should I look for a 4-pin only display?

Regards,
Richard.
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#33
(12-01-2018, 01:31 PM)rh2018 Wrote: Hi Remy,

Having a 16x2 LCD display up and running I thought I would try an OLED panel.

I found a 0.96inch 128x64 12c SSD1306 panel but it has a reset pin in addition to the usual Vcc, Gnd, SCL and SDA pins.

Datasheet link - http://www.tinyosshop.com/datasheet/Tiny...Manual.pdf

I could not see a reference to a reset pin in pydPiper. Do you think this display will work with moOde or should I look for a 4-pin only display?

Regards,
Richard.

Hi Richard, you can ignore the reset pin. Just make sure it is configured for i2c interface (s1 and s2 soldered).
Remy
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#34
(11-30-2018, 11:14 PM)maTzGP Wrote: Hi, Remy,
wow, what a great work. the installation routine worked perfect... and just found the solution for the wrong time problem.
unfortunatly there is no indication for title and so on if i stream from spotify to moode directl.
Any hint?
best wishes for 1. Advent
Matthias
Hi Matthias. As for now you can't display the data when using spotify or airplay. Volumio can display those data without a problem. Have a look at this thread 
Remy
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#35
Hi, Remy,
but moode sounds better and has no trouble while spotify is streaming. Volumio has... thats why i changed to moode!!
so... its not a problem...
tx
matthias
Reply
#36
(12-01-2018, 05:42 PM)remy1961 Wrote:
(12-01-2018, 01:31 PM)rh2018 Wrote: Hi Remy,

Having a 16x2 LCD display up and running I thought I would try an OLED panel.

I found a 0.96inch 128x64 12c SSD1306 panel but it has a reset pin in addition to the usual Vcc, Gnd, SCL and SDA pins.

Datasheet link - http://www.tinyosshop.com/datasheet/Tiny...Manual.pdf

I could not see a reference to a reset pin in pydPiper. Do you think this display will work with moOde or should I look for a 4-pin only display?

Regards,
Richard.

Hi Richard, you can ignore the reset pin. Just make sure it is configured for i2c interface (s1 and s2 soldered).
Remy

Thanks Remy
Reply
#37
(12-01-2018, 07:20 PM)maTzGP Wrote: Hi, Remy,
but moode sounds better and has no trouble while spotify is streaming. Volumio has... thats why i changed to moode!!
so... its not a problem...
tx
matthias
Yes, I also think moOde is much better than volumio, especially the interface. And since i don't use spotify and only rarely use airplay, it is not a problem for me.
Remy
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#38
Hi, good evening from germany,

got a new bigger Oled 1.3" display (1306) ... did nothing change, but it does not work properly... which screw to drill... 


pagefile = pages_ssd1306.py ?


display devicetype = ssd1306 ?... could it be that it uses the sh1106 driver? so where to find it for moode?

perhaps you know...
the 0.96 1306 display did work properly...

1.000 thx
matthias


Attached Files Thumbnail(s)
   
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#39
(12-05-2018, 08:20 PM)maTzGP Wrote: Hi, good evening from germany,

got a new bigger Oled 1.3" display (1306) ... did nothing change, but it does not work properly... which screw to drill... 


pagefile = pages_ssd1306.py ?


display devicetype = ssd1306 ?... could it be that it uses the sh1106 driver? so where to find it for moode?

perhaps you know...
the 0.96 1306 display did work properly...

1.000 thx
matthias

solved: just edit the configure.py  ...displaytype: sh1106...

greets matthias
Reply
#40
Hello. I've finally just updated my player from the beta version (lol) and installed this awesome LCD script. I am using a parallel interface with a 20x4 LCD. The only thing is, I used to have a backlight control and I don't see this implemented anywhere in your script. Is there any way to do this? For me it was, backlight on when playing or paused, and off when stopped..

I guess this might be a bit more complicated with the Weather and other options you have.

Here is the code I was using before:

Code:
#!/usr/bin/python
# -*- coding: utf-8 -*-
#--------------------------------------
#
# The LCD Driver portion of this code
# created by:
#    ___  ___  _ ____
#   / _ \/ _ \(_) __/__  __ __
#  / , _/ ___/ /\ \/ _ \/ // /
# /_/|_/_/  /_/___/ .__/\_, /
#                /_/   /___/
#
#  lcd_16x2.py
#  20x4 LCD Test Script with
#  backlight control and text justification
#
# Author : Matt Hawkins
# Date   : 06/04/2015
#
# https://www.raspberrypi-spy.co.uk/
#--------------------------------------
#
# The Moode audio portion of the code
# created by:
#
# Author : Bryce Jeannotte
# Date   : 08/31/2017
#
#--------------------------------------
# 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
# 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

#import
import os
import RPi.GPIO as GPIO
import time

# Define GPIO to LCD mapping
# Change this table to match the BGM GPIO
# numbers to your display wiring
LCD_RS = 7
LCD_E  = 8
LCD_D4 = 25
LCD_D5 = 24
LCD_D6 = 23
LCD_D7 = 14
LED_ON = 15

# 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 = 0.0005
E_DELAY = 0.0005

# Scrolling constants
ST_DELAY = 1.5     # Delay before scrolling first line
SF_DELAY = .5      # Delay before scrolling second and third line
SC_DELAY = .25     # Delay between scrolling characters
SC_COUNT = 2       # Number of characters to scroll at one time
SC_REPEAT = True   # Continous scrolling switch
SR_DELAY = 10      # Delay before repeating the scrolling
VD_DISPLAY = True  # Volume display switch
VD_DELAY = 2.5     # Number of seconds to display volume change

# Cool our jets
time.sleep(15)

# currentsont.txt timestamp
csts = os.stat("/var/local/www/currentsong.txt").st_mtime
ivol = 0

def main():

 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(LED_ON, GPIO.OUT) # Backlight enable

 # Initialise display
 splash_screen()
 lcd_backlight(False)
 while True:
   global csts, ivol
   # Has currentsong.txt changed?
   if (csts <> os.stat("/var/local/www/currentsong.txt").st_mtime):
     csts = os.stat("/var/local/www/currentsong.txt").st_mtime

     try:
       # Read the currentsong.txt file and format the diplay lines
       with open("/var/local/www/currentsong.txt","r") as currentsong:
         lines = currentsong.readlines()

         a,artist = lines[1].split("=")
         a,album = lines[2].split("=")
         a,title = lines[3].split("=")
         a,year = lines[6].split("=")
         a,encoded = lines[8].split("=")
         a,bitrate = lines[9].split("=")
         a,volume = lines[10].split("=")
         a,mute = lines[11].split("=")
         a,status = lines[12].split("=")

         # Remove white space
         artist = artist.strip()
         album = album.strip()
         title = title.strip()
         year = year.strip()
         encoded = encoded.strip()
         bitrate = bitrate.strip()
         volume = volume.strip()
         mute = mute.strip()
         status = status.strip()

         # Remove accented characters for LCD display
         artist = remove_accent(artist)
         album = remove_accent(album)
         title = remove_accent(title)

         # Flip bit depth and sample rate
         if ("/" in encoded):
           encoded_only = encoded.split(" ",1)
           bitdepth,samplerate = encoded_only[0].split("/")
           encoded = "%s-%s" % (samplerate, bitdepth)

         # Build the display lines
         if status == "stop":
           line1 = " moOde Audio Player"
           line2 = "We are done for now!"
           line3 = ""
           line4 = "  <== Stopped ==>"
        lcd_backlight(False)
         else:
           if artist == "Radio station":
          lcd_backlight(True)
             line1 = artist
             line2 = album
             if (title[:5] == "http:"):
               line3 = "Internet stream"
             else:
               line3 = title
           else:
          lcd_backlight(True)
             line1 = artist
             line2 = title
             line3 = album
           if status == "pause":
             line4 = "   <== Paused ==>"
          lcd_backlight(False)
           elif VD_DISPLAY:
             if mute == "1":
               ivol = -1
               line4 = "   <== Muted ==>"
               lcd_init()
             else:
               if ivol == volume:
                 line4 = "%s | %s" % (encoded, bitrate)
               else:
                 ivol = volume
                 line4 = "%s %s%s" % (" <== Volume", volume, "% ==>")
           else:
             line4 = "%s | %s" % (encoded, bitrate)

         # Send the lines to the display
         lcd_string(line1,LCD_LINE_1,1)
         lcd_string(line2,LCD_LINE_2,1)
         lcd_string(line3,LCD_LINE_3,1)
         lcd_string(line4,LCD_LINE_4,1)

         # Close currentsong.txt
         currentsong.close()

         # Check if we need to display volume change
         if ("Volume" in line4 and VD_DISPLAY):
           sleep_for(VD_DELAY)
           csts = -1

         # Check if we need to scroll
         if (status == "play" and SC_REPEAT):
           rc = 0
           while rc>= 0:
          rc = check_scrolling(line1, line2, line3, csts)
         elif (status == "play"):
        check_scrolling(line1, line2, line3, csts)

     except Exception:
       pass

   else:
     sleep_for(.3)

def splash_screen():
 # Splash screen text
 lcd_init()
 line1 = "Welcome to the"
 line2 = "moOde Audio Player"
 line3 = "--------------------"
 line4 = "Enjoy the Music!"

 # Display the splash screen
 lcd_string(line1,LCD_LINE_1,2)
 lcd_string(line2,LCD_LINE_2,2)
 lcd_string(line3,LCD_LINE_3,2)
 lcd_string(line4,LCD_LINE_4,2)

def remove_accent(text):
 # Remove Accents
 text = text.replace("à", "a")
 text = text.replace("á", "a")
 text = text.replace("â", "a")
 text = text.replace("ã", "a")
 text = text.replace("ä", "a")
 text = text.replace("è", "e")
 text = text.replace("é", "e")
 text = text.replace("ê", "e")
 text = text.replace("ë", "e")
 text = text.replace("ì", "i")
 text = text.replace("í", "i")
 text = text.replace("î", "i")
 text = text.replace("ï", "i")
 text = text.replace("ñ", "n")
 text = text.replace("ò", "o")
 text = text.replace("ó", "o")
 text = text.replace("ô", "o")
 text = text.replace("õ", "o")
 text = text.replace("ö", "o")
 text = text.replace("ù", "u")
 text = text.replace("ú", "u")
 text = text.replace("û", "u")
 text = text.replace("ü", "u")
 text = text.replace("ý", "y")
 text = text.replace("ÿ", "y")
 text = text.replace("ç", "c")
 return text

def check_scrolling(line1, line2, line3, csts):
 # Check if display line needs to be scrolled
           S_DELAY = True
           if (len(line1) > LCD_WIDTH):
             S_DELAY = False
             time.sleep(ST_DELAY)
             # Scroll Line 1
             rc = scroll_line(line1, LCD_LINE_1, csts)
             if rc < 0:
               return rc

           if (len(line2) > LCD_WIDTH):
             if S_DELAY:
               S_DELAY = False
               time.sleep(ST_DELAY)
             else:
               time.sleep(SF_DELAY)
             # Scroll Line 2
             rc = scroll_line(line2, LCD_LINE_2, csts)
             if rc < 0:
               return rc

           if (len(line3) > LCD_WIDTH):
             if S_DELAY:
               S_DELAY = False
               time.sleep(ST_DELAY)
             else:
               time.sleep(SF_DELAY)
             # Scroll Line 3
             rc = scroll_line(line3, LCD_LINE_3, csts)
             if rc < 0:
               return rc

           if (SC_REPEAT and not S_DELAY):
             rc = sleep_for(SR_DELAY)
             return rc
           else:
             rc = sleep_for(.3)
             return rc

def scroll_line(text, line, csts):
 # Scroll display line
 if (len(text) % SC_COUNT == 0):
   line_length = len(text) + 1
 else:
   line_length = len(text) + SC_COUNT
 for num in xrange(SC_COUNT,line_length,SC_COUNT):
   if (csts <> os.stat("/var/local/www/currentsong.txt").st_mtime):
     return -1
   scrollpart = text[num:num + 20]
   lcd_string(scrollpart,line,1)
   if scrollpart == "":
     time.sleep(SF_DELAY)
   else:
     time.sleep(SC_DELAY)
 lcd_string(text,line,1)
 return 0

def sleep_for(count):
 # Sleep for count seconds and check for exit every .1 seconds
 count = int((count * 10)//1)
 for num in xrange(1,count,1):
   if (csts <> os.stat("/var/local/www/currentsong.txt").st_mtime):
     return -1
   else:
     time.sleep(.1)
 return 0

def lcd_init():
 # Initialise display
 lcd_byte(0x33,LCD_CMD) # 110011 Initialise
 lcd_byte(0x32,LCD_CMD) # 110010 Initialise
 lcd_byte(0x06,LCD_CMD) # 000110 Cursor move direction
 lcd_byte(0x0C,LCD_CMD) # 001100 Display On,Cursor Off, Blink Off
 lcd_byte(0x28,LCD_CMD) # 101000 Data length, number of lines, font size
 lcd_byte(0x01,LCD_CMD) # 000001 Clear display
 time.sleep(E_DELAY)

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
 lcd_toggle_enable()

 # 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
 lcd_toggle_enable()

def lcd_toggle_enable():
 # Toggle enable
 time.sleep(E_DELAY)
 GPIO.output(LCD_E, True)
 time.sleep(E_PULSE)
 GPIO.output(LCD_E, False)
 time.sleep(E_DELAY)

def lcd_string(message,line,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," ")

 lcd_byte(line, LCD_CMD)

 for i in range(LCD_WIDTH):
   lcd_byte(ord(message[i]),LCD_CHR)

def lcd_backlight(flag):
 # Toggle backlight on-off-on
 GPIO.output(LED_ON, flag)

if __name__ == '__main__':

 try:
   main()
 except KeyboardInterrupt:
   pass
 finally:
   lcd_init()
   GPIO.cleanup()
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