LCDd -f -r 5 -s 0
LCDd version 0.5.7 starting
Built on Tue, 22 Mar 2016 19:45:10 +0100, protocol version 0.3, API version 0.5
Using Configuration File: /etc/LCDd.conf
Set report level to 5, output to stderr
LCDd 0.5.7, LCDproc Protocol 0.3
Part of the LCDproc suite
Copyright (C) 1998-2014 William Ferrell, Selene Scriven
and many other contributors
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
Server running in foreground
Listening for queries on 127.0.0.1:13666
screenlist_init()
driver_load(name="hd44780", filename="/home/pi/hd44780.so")
HD44780: using ConnectionType: rpi
hd44780: Using hd44780_default charmap
can not open /dev/mem
Failed to set up gpio.
Driver [hd44780] init failed, return code -1
Module /home/pi/hd44780.so could not be loaded
Could not load driver hd44780
There is no output driver
Critical error while initializing, abort.
Chápu to tak, že to nechce najít ovladač ? Cesta souhlasí.
Ten script jsem zkusil přepsat znovu a teď to píše
Traceback (most recent call last):
File "/home/pi/Radio/i2clcda_pokus.py", line 98, in <module>
main()
File "/home/pi/Radio/i2clcda_pokus.py", line 91, in main
lcd_string(text,LCD_LINE_1)
File "/home/pi/Radio/i2clcda_pokus.py", line 75, in lcd_string
message = message.ljust(LCD_WIDTH," ")
TypeError: ljust() argument 2 must be a byte string of length 1, not str
Script
import smbus
import time
import subprocess
# Define some device parameters
I2C_ADDR = 0x27 # I2C device address, if any error, change this address to 0x3f
LCD_WIDTH = 16 # Maximum characters per line
# 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 = 0x00 # Off
ENABLE = 0b00000100 # Enable bit
# Timing constants
E_PULSE = 0.0005
E_DELAY = 0.0005
#Open I2C interface
#bus = smbus.SMBus(0) # Rev 1 Pi uses 0
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)
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 main():
# Main program block
# Initialise display
lcd_init()
while True:
text = subprocess.check_output('echo "currentsong" | nc localhost 6600 | grep -e "^Title: "', shell=True)
# Send some test
lcd_string(text,LCD_LINE_1)
if __name__ == '__main__':
try:
main()
except KeyboardInterrupt:
pass
finally:
lcd_byte(0x01, LCD_CMD)