Различия

Здесь показаны различия между двумя версиями данной страницы.

--- dev:pi:main [2016/09/20 17:39]
denis [rtc ds3231]
+++ dev:pi:main [2016/12/09 10:15] (текущий)
denis [shutdown]
@@ Строка 91: / Строка 91: @@
 . Enable I2C:
   sudo raspi-config
-  "7 Advanced Options" / "A6 I2C"
+  "Advanced Options" / "A6 I2C"
-. Install I2C-tools:
+. Sort out packages:
+<code bash>
   sudo apt-get install python-smbus i2c-tools
+  sudo apt-get purge fake-hwclock ntp
+  sudo apt-get install ntpdate # TODO: not found
+  sudo apt-get update
+  sudo apt-get upgrade
+  sudo apt-get dist-upgrade
+</code>
 . Check Pi starts I2C automatically in ''/etc/modules'':
@@ Строка 100: / Строка 108: @@
 . Check user has group (change ''pi'' to required):
+<code bash>
   sudo adduser pi i2c
+</code>
-. Update to latest packeges:
-  sudo apt-get update
-  sudo apt-get upgrade
-  sudo apt-get dist-upgrade
-. reboot
+. Add at the end of ''/boot/config.txt'':
-. Check RTC appears on channel 68:
-  sudo i2cdetect -y 1
-. Add at the end of ''/boot/config.txt'':
   dtoverlay=i2c-rtc,ds3231
+. Add the line in ''/etc/rc.local'' (above “exit 0”):
+  /sbin/hwclock -s
-. Don't need hwclock and ntp:
+. Change in ''/etc/init.d/hwclock.sh'':
-<code bash>
+  HWCLOCKACCESS=no
-  sudo apt-get purge fake-hwclock
-  sudo apt-get purge ntp
-  sudo apt-get install ntpdate
-</code>
-. Set date/time:
+. reboot
+. Set date/time:
+<code bash>
   sudo dpkg-reconfigure tzdata
   sudo date -s "2 SEPTEMBER 2016 10:00:00"
   sudo hwclock -w
+</code>
-. Add the line in ''/etc/rc.local'' (above “exit 0”):
-  /sbin/hwclock -s
-. Change in ''/etc/init.d/hwclock.sh'':
-  HWCLOCKACCESS=no
-. reboot
 Done!
 . Other info commands:
+<code bash>
+  sudo i2cdetect -y 1
   sudo dmesg | grep rtc
   sudo cat /proc/driver/rtc
+</code>
 Compiled from: [[https://elementztechblog.wordpress.com/2015/08/08/real-time-clock-rtc-interfacing-with-raspberrypi/|src1]] [[https://trick77.com/adding-ds3231-real-time-clock-raspberry-pi-3/|src2]]
@@ Строка 145: / Строка 145: @@
+===== shutdown =====
+{{:dev:pi:rpi_shutdown_scheme.png|}}
+''/home/pi/softshut/softshut.py'':
+<code python>
+#!/usr/bin/python
+import time
+from subprocess import call
+import RPi.GPIO as gpio
+pinBt=19
+pinAC=21
+pinLed=23
+dlyShutdownBt = 5
+dlyShutdownAC = 10
+dlyLedOk = 1
+dlyLedFast = 0.1
+def loop():
+  hasBt = False
+  hasAC = False
+  timeBt = 0
+  timeAC = 0
+  dlyLed = dlyLedOk
+  terminated = False
+  while gpio.input(pinBt)>0 or gpio.input(pinAC)>0:
+    for i in range(0,3):
+      gpio.output(pinLed, True)
+      time.sleep(dlyLedFast)
+      gpio.output(pinLed, False)
+      time.sleep(dlyLedFast)
+    time.sleep(dlyLedOk)
+  while not terminated:
+    if gpio.input(pinBt)==0:
+      if timeBt > 0:
+        print "Bt OK"
+        timeBt = 0
+    else:
+      if timeBt == 0:
+        print "Bt failed"
+        timeBt = time.time()
+      else:
+        if time.time() - timeBt > dlyShutdownBt:
+          print "Bt shutdown"
+          doShutdown()
+          terminated = True
+    if gpio.input(pinAC)==0:
+      if timeAC > 0:
+        print "AC OK"
+        timeAC = 0
+    else:
+      if timeAC == 0:
+        print "AC failed"
+        timeAC = time.time()
+      else:
+        if time.time() - timeAC > dlyShutdownAC:
+          print "AC shutdown"
+          doShutdown()
+          terminated = True
+    if (timeAC > 0  or  timeBt > 0) and dlyLed == dlyLedOk:
+      dlyLed = dlyLedFast
+    elif timeAC == 0  and  timeBt == 0  and  dlyLed != dlyLedOk:
+      dlyLed = dlyLedOk
+    gpio.output(pinLed, True)
+    time.sleep(dlyLed)
+    gpio.output(pinLed, False)
+    time.sleep(dlyLed)
+def eventButton(pin):
+  print "Button shutdown"
+  doShutdown()
+def doShutdown():
+#  call('halt', shell=False)
+  print "SHUTDOWN!!!"
+gpio.setmode(gpio.BOARD)
+gpio.setup(pinBt, gpio.IN)
+gpio.setup(pinAC, gpio.IN)
+gpio.setwarnings(False)
+gpio.setup(pinLed, gpio.OUT)
+loop()
+gpio.cleanup()
+</code>
+''/etc/rc.local'':
+<code bash>
+# add this line before "exit 0"
+python /home/pi/softshut/softshut.py &
+</code>