Un écran lcd sur l’Orange Pi

sur le serveur « master » :

root@master:~# apt-get install nmap python-smbus

1	root@master:~# apt-get install nmap python-smbus

activer la prise en charge du port i2c0 avec le kernel mainline 4.10 :

root@master:~# cat /boot/armbianEnv.txt
verbosity=1
logo=disabled
console=both
disp_mode=1920x1080p60
overlay_prefix=sun8i-h3
overlays=i2c0
rootdev=UUID=ad705968-27e2-4b95-b597-bb5cfa710dbe
rootfstype=ext4

root@master:~# cat /boot/armbianEnv.txt

verbosity=1

logo=disabled

console=both

disp_mode=1920x1080p60

overlay_prefix=sun8i-h3

overlays=i2c0

rootdev=UUID=ad705968-27e2-4b95-b597-bb5cfa710dbe

rootfstype=ext4

lancer automatiquement les scripts d’affichage sur l’ecran lcd

root@master:~# nano /etc/rc.local
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

#kernel 3
#echo none >/sys/class/leds/red_led/trigger
#echo mmc0 >/sys/class/leds/red_led/trigger
#echo 1 >/sys/class/leds/green_led/brightness

#kernel 4
echo mmc0 >/sys/class/leds/orangepi\:red\:status/trigger
echo default-on >/sys/class/leds/orangepi\:green\:pwr/trigger

/root/lcd_i2c/lcd_clusterpi.py &
ncat -4 -lk --send-only -p 4444 -c '/bin/lcdoutput.sh'

exit 0

root@master:~# nano /etc/rc.local

#!/bin/sh -e

# rc.local

# This script is executed at the end of each multiuser runlevel.

# Make sure that the script will "exit 0" on success or any other

# value on error.

# In order to enable or disable this script just change the execution

# bits.

# By default this script does nothing.

#kernel 3

#echo none >/sys/class/leds/red_led/trigger

#echo mmc0 >/sys/class/leds/red_led/trigger

#echo 1 >/sys/class/leds/green_led/brightness

#kernel 4

echo mmc0 >/sys/class/leds/orangepi\:red\:status/trigger

echo default-on >/sys/class/leds/orangepi\:green\:pwr/trigger

/root/lcd_i2c/lcd_clusterpi.py &

ncat -4 -lk --send-only -p 4444 -c '/bin/lcdoutput.sh'

exit 0

root@master:~# nano /bin/lcdoutput.sh
#!/bin/sh
CMD="unknown"
LINE="unknown"

while read line;
do

#temp=`cat /sys/class/thermal/thermal_zone1/temp`
read raw_temp </etc/armbianmonitor/datasources/soctemp

# kernel 4
#board_temp=$(awk "BEGIN {printf \"%d\", $raw_temp/1000}")
board_temp=$raw_temp

sd_usage=$(df -h / | awk '/\// {print $(NF-1)}' | sed 's/%//g')

# kernel 4
#mem_info=$(LANG=en_US.UTF-8 free -w 2>/dev/null | grep "^Mem" || LANG=en_US.UTF-8 free | grep "^Mem")
#mem_usg_pct=$(echo $mem_info | awk '{printf("%.0f",(($2-($4+$6+$7))/$2) * 100)}')

mem_usg_pct=$(free | awk '/Mem/ {printf("%.0f",(($2-($4+$6+$7))/$2) * 100)}')

#seti_load=`top -n1 -b | grep setiathome | cut -c49-50 | paste -sd+ | bc`
#sd_total=$(df -h / | awk '/\// {print $(NF-3)}')

load=$(cat /proc/loadavg | awk '{print $1}')

  CMD=`echo ${line}`


  case $CMD in
  sys)
        LINE="sd:$sd_usage% mem:$mem_usg_pct%"
  ;;
  temp)
        LINE="$board_temp.C $load"
  ;;
  *)
     	LINE="unknown"
  ;;
  esac
  echo $LINE
  break
done

root@master:~# nano /bin/lcdoutput.sh

#!/bin/sh

CMD="unknown"

LINE="unknown"

while read line;

#temp=`cat /sys/class/thermal/thermal_zone1/temp`

read raw_temp </etc/armbianmonitor/datasources/soctemp

# kernel 4

#board_temp=$(awk "BEGIN {printf \"%d\", $raw_temp/1000}")

board_temp=$raw_temp

sd_usage=$(df -h / | awk '/\// {print $(NF-1)}' | sed 's/%//g')

# kernel 4

#mem_info=$(LANG=en_US.UTF-8 free -w 2>/dev/null | grep "^Mem" || LANG=en_US.UTF-8 free | grep "^Mem")

#mem_usg_pct=$(echo $mem_info | awk '{printf("%.0f",(($2-($4+$6+$7))/$2) * 100)}')

mem_usg_pct=$(free | awk '/Mem/ {printf("%.0f",(($2-($4+$6+$7))/$2) * 100)}')

#seti_load=`top -n1 -b | grep setiathome | cut -c49-50 | paste -sd+ | bc`

#sd_total=$(df -h / | awk '/\// {print $(NF-3)}')

load=$(cat /proc/loadavg | awk '{print $1}')

CMD=`echo ${line}`

case $CMD in

sys)

LINE="sd:$sd_usage% mem:$mem_usg_pct%"

;;

temp)

LINE="$board_temp.C $load"

;;

LINE="unknown"

;;

esac

echo $LINE

break

done

root@master:~# nano /sbin/lcd_clusterpi.py
#!/usr/bin/python
#--------------------------------------
#    ___  ___  _ ____
#   / _ \/ _ \(_) __/__  __ __
#  / , _/ ___/ /\ \/ _ \/ // /
# /_/|_/_/  /_/___/ .__/\_, /
#                /_/   /___/
#
#  lcd_i2c.py
#  LCD test script using I2C backpack.
#  Supports 16x2 and 20x4 screens.
#
# Author : Matt Hawkins
# Date   : 20/09/2015
#
# http://www.raspberrypi-spy.co.uk/
#
# Copyright 2015 Matt Hawkins
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
#
#--------------------------------------
import smbus
import time
import os 

# Define some device parameters
I2C_ADDR  = 0x27 # I2C device address
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:

    #Get CPU and temperature
    #temp = os.popen('cat /sys/class/thermal/thermal_zone1/temp').readline()

    ip = os.popen(' '+"ip addr show wlan0 | grep 'inet ' | cut -d'/' -f1 | cut -d 't' -f 2").readline()[:-1]
    #ip = os.popen('ip addr show wlan0').read().split("inet ")[1].split("/")[0]

    # Send some test
    lcd_string("OPI'One Cluster ",LCD_LINE_1)
    lcd_string(ip,LCD_LINE_2)

    time.sleep(2)

    s0l1 = os.popen("echo temp | nc -q -1 localhost 4444").readline() 
    s0l2 = os.popen("echo sys | nc -q -1 localhost 4444").readline()

    lcd_string("Pi0: "+s0l1[:-1],LCD_LINE_1)
    lcd_string(""+s0l2[:-1],LCD_LINE_2)

    time.sleep(2)
  
    s1l1 = os.popen("echo temp | nc -q -1 slave1 4444").readline() 
    s1l2 = os.popen("echo sys | nc -q -1 slave1 4444").readline()

    lcd_string("Pi1: "+s1l1[:-1],LCD_LINE_1)
    lcd_string(""+s1l2[:-1],LCD_LINE_2)

    time.sleep(2)

    s2l1 = os.popen("echo temp | nc -q -1 slave2 4444").readline() 
    s2l2 = os.popen("echo sys | nc -q -1 slave2 4444").readline()

    lcd_string("Pi2: "+s2l1[:-1],LCD_LINE_1)
    lcd_string(""+s2l2[:-1],LCD_LINE_2)

    time.sleep(2)

if __name__ == '__main__':

  try:
    main()
  except KeyboardInterrupt:
    pass
  finally:
    lcd_byte(0x01, LCD_CMD)

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

root@master:~# nano /sbin/lcd_clusterpi.py

#!/usr/bin/python

#--------------------------------------

# ___ ___ _ ____

# / _ \/ _ \(_) __/__ __ __

# / , _/ ___/ /\ \/ _ \/ // /

# /_/|_/_/ /_/___/ .__/\_, /

# /_/ /___/

# lcd_i2c.py

# LCD test script using I2C backpack.

# Supports 16x2 and 20x4 screens.

# Author : Matt Hawkins

# Date : 20/09/2015

# http://www.raspberrypi-spy.co.uk/

# 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 3 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, see <http://www.gnu.org/licenses/>.

#--------------------------------------

import smbus

import time

import os

# Define some device parameters

I2C_ADDR = 0x27 # I2C device address

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:

#Get CPU and temperature

#temp = os.popen('cat /sys/class/thermal/thermal_zone1/temp').readline()

ip = os.popen(' '+"ip addr show wlan0 | grep 'inet ' | cut -d'/' -f1 | cut -d 't' -f 2").readline()[:-1]

#ip = os.popen('ip addr show wlan0').read().split("inet ")[1].split("/")[0]

# Send some test

lcd_string("OPI'One Cluster ",LCD_LINE_1)

lcd_string(ip,LCD_LINE_2)

time.sleep(2)

s0l1 = os.popen("echo temp | nc -q -1 localhost 4444").readline()

s0l2 = os.popen("echo sys | nc -q -1 localhost 4444").readline()

lcd_string("Pi0: "+s0l1[:-1],LCD_LINE_1)

lcd_string(""+s0l2[:-1],LCD_LINE_2)

time.sleep(2)

s1l1 = os.popen("echo temp | nc -q -1 slave1 4444").readline()

s1l2 = os.popen("echo sys | nc -q -1 slave1 4444").readline()

lcd_string("Pi1: "+s1l1[:-1],LCD_LINE_1)

lcd_string(""+s1l2[:-1],LCD_LINE_2)

time.sleep(2)

s2l1 = os.popen("echo temp | nc -q -1 slave2 4444").readline()

s2l2 = os.popen("echo sys | nc -q -1 slave2 4444").readline()

lcd_string("Pi2: "+s2l1[:-1],LCD_LINE_1)

lcd_string(""+s2l2[:-1],LCD_LINE_2)

time.sleep(2)

if __name__ == '__main__':

try:

main()

except KeyboardInterrupt:

pass

finally:

lcd_byte(0x01, LCD_CMD)

Un écran lcd sur l’Orange Pi

Pierrick's lab

Un écran lcd sur l’Orange Pi

Un avis sur « Un écran lcd sur l’Orange Pi »

Laisser un commentaire Annuler la réponse.