This is not a professional solution but it works for me
radio.py
Code: Select all
#!/usr/bin/python
# -*- coding: utf-8 -*-
import smbus
import time
import subprocess
from time import sleep, strftime
from datetime import datetime
from subprocess import *
# Define some device parameters
I2C_ADDR = 0x3f # I2C device address
LCD_WIDTH = 16 # Maximum characters per line
# Timing constants for low level write operations
# NOTE: Enable cycle time must be at least 1 microsecond
# NOTE2: Actually, these can be zero and the LCD will typically still work OK
EDEL_TAS = 0.00001 # Address setup time (TAS)
EDEL_PWEH = 0.00001 # Pulse width of enable (PWEH)
EDEL_TAH = 0.00001 # Address hold time (TAH)
# Timing constraints for initialisation steps - IMPORTANT!
# Note that post clear display must be at least 6.2ms for OLEDs, as opposed
# to only 1.4ms for HD44780 LCDs. This has caused confusion in the past.
DEL_INITMID = 0.01 # middle of initial write (min 4.1ms)
DEL_INITNEXT = 0.0002 # post ssecond initial write (min 100ns)
DEL_POSTCLEAR = 0.01 # post clear display step (busy, min 6.2ms)
# Define some device constants
LCD_CHR = 1 # Mode - Sending data
LCD_CMD = 0 # Mode - Sending command
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
LCD_BACKLIGHT = 0x08 # On
#LCD_BACKLIGHT = 0x0C # Off
ENABLE = 0b00000100 # Enable bit
# Timing constants
E_PULSE = 0.005
E_DELAY = 0.005
#Open I2C interface
bus = smbus.SMBus(0) # Rev 1 Pi uses 0 (and Orange PI PC, for pins 3 and 5)
#bus = smbus.SMBus(1) # Rev 2 Pi uses 1
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)
lcd_byte(0x06,LCD_CMD) # entry mode set
# extra steps required for OLED initialisation (no effect on LCD)
lcd_byte(0x17,LCD_CMD) # character mode, power on
# now turn on the display, ready for use - IMPORTANT!
lcd_byte(0x0C,LCD_CMD) # display on, cursor/blink off
def lcd_byte(bits, mode):
# Send byte to data pins
# bits = the data
# mode = 1 for data
# 0 for command
bits_high = mode | (bits & 0xF0) | LCD_BACKLIGHT
bits_low = mode | ((bits<<4) & 0xF0) | LCD_BACKLIGHT
# High bits
bus.write_byte(I2C_ADDR, bits_high)
lcd_toggle_enable(bits_high)
# Low bits
bus.write_byte(I2C_ADDR, bits_low)
lcd_toggle_enable(bits_low)
def lcd_toggle_enable(bits):
# Toggle enable
time.sleep(E_DELAY)
bus.write_byte(I2C_ADDR, (bits | ENABLE))
time.sleep(E_PULSE)
bus.write_byte(I2C_ADDR,(bits & ~ENABLE))
time.sleep(E_DELAY)
def lcd_string(message,line):
# Send string to display
message = message.ljust(LCD_WIDTH," ")
lcd_byte(line, LCD_CMD)
for i in range(LCD_WIDTH):
lcd_byte(ord(message[i]),LCD_CHR)
def replace_pl(chars):
pl = { 'ą': 'a',
'ć': 'c',
'ę': 'e',
'ł': 'l',
'ń': 'n',
'ó': 'o',
'ś': 's',
'ź': 'z',
'ż': 'z',
'Ą': 'A',
'Ć': 'C',
'Ę': 'E',
'Ł': 'L',
'Ń': 'N',
'Ó': 'O',
'Ś': 'S',
'Ź': 'Z',
'Ż': 'Z',
}
for f, t in pl.items():
chars = chars.replace(f,t)
return chars
def main():
# Initialise display
lcd_init()
counter = 0
while True:
# Get current status and playtime
process = subprocess.Popen('sudo mpc -v', shell=True, stdout=subprocess.PIPE)
ekran1 = process.communicate()[0]
ekran1 = replace_pl(ekran1)
statusLines = ekran1.split('\n')
ekran1 = statusLines[1]
if ekran1 <> '':
ekran1L1 = ekran1.split(' ',1)[0].strip()
ekran1L2temp = ekran1.split(' ',1)[1].strip()
ekran1L2 = ekran1L2temp.split(' ',1)[0].strip()
process = subprocess.Popen('sudo mpc -f %name%', shell=True, stdout=subprocess.PIPE)
ekran2 = process.communicate()[0]
ekran2 = replace_pl(ekran2)
statusLines = ekran2.split('\n')
ekran2 = statusLines[0]
ekran2L1 = ekran2[0:16]
ekran2L2 = ekran2[16:31]
process = subprocess.Popen('sudo mpc -f %artist%', shell=True, stdout=subprocess.PIPE)
ekran3 = process.communicate()[0]
ekran3 = replace_pl(ekran3)
statusLines = ekran3.split('\n')
ekran3 = statusLines[0]
ekran3L1 = ekran3[0:16]
ekran3L2 = ekran3[16:31]
process = subprocess.Popen('sudo mpc -f %title%', shell=True, stdout=subprocess.PIPE)
ekran4 = process.communicate()[0]
ekran4 = replace_pl(ekran4)
statusLines = ekran4.split('\n')
ekran4 = statusLines[0]
ekran4L1 = ekran4[0:16]
ekran4L2 = ekran4[16:31]
if counter == 1:
if ekran1 == "":
counter = 15
else:
lcd_string(ekran1L1,LCD_LINE_1)
lcd_string(ekran1L2,LCD_LINE_2)
if counter == 15:
if ekran2 == "":
counter = 30
else:
lcd_string(ekran2L1,LCD_LINE_1)
lcd_string(ekran2L2,LCD_LINE_2)
if counter == 30:
if ekran3 == "":
counter = 45
else:
lcd_string(ekran3L1,LCD_LINE_1)
lcd_string(ekran3L2,LCD_LINE_2)
if counter == 45:
if ekran4 == "":
counter = 60
else:
lcd_string(ekran4L1,LCD_LINE_1)
lcd_string(ekran4L2,LCD_LINE_2)
sleep(0.1)
counter = counter + 1
if counter == 61:
counter = 1
if __name__ == '__main__':
try:
main()
except KeyboardInterrupt:
pass
finally:
lcd_byte(0x00, LCD_CMD)
lcd_byte(0x01, LCD_CMD)
lcd_byte(0x08, LCD_CMD)
Note some entries refer to converting Polish diacritic marks: ąśćółńżź on ascolnzz
In configuration I also use se script which probably clears the display Oled
I'm sorry but I'm not a programmer
lcd-clear.py
Code: Select all
#!/usr/bin/python
import smbus
import time
# Define some device parameters
I2C_ADDR = 0x3f # I2C device address
LCD_WIDTH = 16 # Maximum characters per line
LCD_HEIGHT = 2
# Timing constants for low level write operations
# NOTE: Enable cycle time must be at least 1 microsecond
# NOTE2: Actually, these can be zero and the LCD will typically still work OK
EDEL_TAS = 0.00001 # Address setup time (TAS)
EDEL_PWEH = 0.00001 # Pulse width of enable (PWEH)
EDEL_TAH = 0.00001 # Address hold time (TAH)
# Timing constraints for initialisation steps - IMPORTANT!
# Note that post clear display must be at least 6.2ms for OLEDs, as opposed
# to only 1.4ms for HD44780 LCDs. This has caused confusion in the past.
DEL_INITMID = 0.01 # middle of initial write (min 4.1ms)
DEL_INITNEXT = 0.0002 # post ssecond initial write (min 100ns)
DEL_POSTCLEAR = 0.01 # post clear display step (busy, min 6.2ms)
# Define some device constants
LCD_CHR = 1 # Mode - Sending data
LCD_CMD = 0 # Mode - Sending command
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
LCD_BACKLIGHT = 0x08 # On
#LCD_BACKLIGHT = 0x0C # Off
ENABLE = 0b00000100 # Enable bit
# Timing constants
E_PULSE = 0.0001
E_DELAY = 0.0001
#Open I2C interface
bus = smbus.SMBus(0) # Rev 1 Pi uses 0 (and Orange PI PC, for pins 3 and 5)
#bus = smbus.SMBus(1) # Rev 2 Pi uses 1
def lcd_byte(bits, mode):
# Send byte to data pins
# bits = the data
# mode = 1 for data
# 0 for command
bits_high = mode | (bits & 0xF0) | LCD_BACKLIGHT
bits_low = mode | ((bits<<4) & 0xF0) | LCD_BACKLIGHT
# High bits
bus.write_byte(I2C_ADDR, bits_high)
lcd_toggle_enable(bits_high)
# Low bits
bus.write_byte(I2C_ADDR, bits_low)
lcd_toggle_enable(bits_low)
def lcd_toggle_enable(bits):
# Toggle enable
time.sleep(E_DELAY)
bus.write_byte(I2C_ADDR, (bits | ENABLE))
time.sleep(E_PULSE)
bus.write_byte(I2C_ADDR,(bits & ~ENABLE))
time.sleep(E_DELAY)
def main():
# Main program block
# Send some test
lcd_string("RPiSpy <",LCD_LINE_1)
lcd_string("I2C LCD <",LCD_LINE_2)
if __name__ == '__main__':
try:
main()
except KeyboardInterrupt:
pass
finally:
lcd_byte(0x00, LCD_CMD)
lcd_byte(0x01, LCD_CMD)
lcd_byte(0x08, LCD_CMD)
Stop mpc and run lcdproc with option :Big clock ..... mpc-stop.sh
Code: Select all
#! /bin/sh
mpc stop
killall python
killall lcdproc
killall LCDd
python /root/lcd-clear.py
LCDd -c /etc/LCDd.conf
lcdproc -c /etc/lcdproc.conf
Restart script radio.py : ....... mpc-start.sh
Code: Select all
#! /bin/sh
/bin/sh /root/1.sh
python /root/radio.py &
and 1.sh
Code: Select all
#!/bin/bash
killall lcdproc
killall LCDd
python /root/lcd-clear.py
I do not know why but it works
Maybe someone will do it professionally
Ps. But now I do not use Raspberry Pi but Orange Pi Lite / Armbian !
more information :
Orange/I2C
Internet radio + LCD 2x16 + TactSwitch
regards!
