Alter 4 files

Update `drawing.go`
Add `install.sh`
Add `life-dashboard-init`
Add `start.sh`

imagegen/drawing.go

@@ -257,7 +257,7 @@ func drawTrains(ctx *canvas.Context, startFrom float64, location string, service
 	titleBaseline := startFrom + (bounds.H * 2) + 5
 
 	if len(services) == 0 {
-		services = []string{"*** No services in the next 30 mins ***"}
+		services = []string{"* * * No services in the next 60 mins * * *"}
 	}
 
 	var lh float64

on-device/install.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+set -ex
+
+ssh kindle "/usr/sbin/mntroot rw"
+
+scp start.sh kindle:/start.sh
+scp life-dashboard-init kindle:/etc/init.d/life-dashboard-init
+
+ssh kindle << EOF
+	cd /
+	chmod 777 start.sh
+	chmod 777 /etc/init.d/life-dashboard-init
+
+	echo "Install complete, start script with: `/etc/init.d/life-dashboard-init start` and let it run till the ssh session hangs"
+EOF

on-device/life-dashboard-init

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+case "$1" in
+  start)
+    . /start.sh &
+    ;;
+  stop)
+    echo "I can't let you do that (just restart)"
+    ;;
+  *)
+    echo "Usage: /etc/init.d/life-dashboard-init {start|stop}"
+    exit 1
+    ;;
+esac
+exit 0

on-device/start.sh

@@ -0,0 +1,67 @@
+#!/bin/sh
+# Run via /etc/init.d/life-dashboard-init start
+
+enable_wifi() {
+  lipc-set-prop com.lab126.cmd wirelessEnable 1
+  while ! lipc-get-prop com.lab126.wifid cmState | grep -q CONNECTED; do sleep 1; done
+}
+disable_wifi() { lipc-set-prop com.lab126.cmd wirelessEnable 0; }
+
+cd /
+/usr/sbin/mntroot rw
+
+echo "Setting up low power usage"
+/etc/init.d/framework stop
+echo powersave > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
+lipc-set-prop com.lab126.powerd preventScreenSaver 1
+
+eips -c 12 19 "Starting polling / sleep" && eips 15 20 "Beginning in 30 seconds."
+sleep 30
+
+FILE="/kindle-dashboard.png"
+echo -n "" > /last-etag
+
+while true; do
+    echo "enabling wifi"
+    enable_wifi
+    echo "requesting image"
+
+    /usr/sbin/eips 0 39 "refreshing...                                 "
+
+    RESP=$(/neocurl -s -H "If-None-Match: $(cat /last-etag)" -o $FILE -w '%{http_code} %header{etag}' 'http://kindle.platform.tdpain.net/image')
+    STATUS=$(echo $RESP | awk '{print $1}')
+    echo "Status is $STATUS"
+    ETAG=$(echo $RESP | awk '{print $2}')
+    echo "ETag header is $ETAG"
+
+    if [ "$STATUS" = "200" ] ; then
+        echo "image downloaded" 
+        /usr/sbin/eips -c
+        /bin/fbink -g file=$FILE
+        echo -n "$ETAG" > /last-etag
+    elif [ "$STATUS" = "304" ] ; then
+        echo "no change"
+    else
+        /bin/fbink -pmM -y -8 "Endpoint request failed, exiting"
+        exit
+    fi
+
+    echo "disabling wifi"
+    disable_wifi
+
+    echo "writing stats"
+    
+    let MAX_SLEEP=10*60
+    BATTERY_LEVEL=$(lipc-get-prop com.lab126.powerd battLevel)
+
+    let NEXT_REFRESH=$(($(date -d 23:59:59 +%s) - $(date +%s))) # seconds till midnight
+    if [ $NEXT_REFRESH -le 0 ] || [ $NEXT_REFRESH -ge $MAX_SLEEP ] ; then NEXT_REFRESH=$MAX_SLEEP; fi
+    
+    let NEXT_REFRESH_minutes=$NEXT_REFRESH/60
+    /usr/sbin/eips 0 39 "r.$(date '+%F %H:%M') n.$NEXT_REFRESH_minutes b.$BATTERY_LEVEL"
+
+    echo "entering rtc sleep"
+    sleep 5
+    echo $NEXT_REFRESH > /sys/devices/platform/mxc_rtc.0/wakeup_enable
+    echo "mem" > /sys/power/state
+done