Implement hdmi on/off command for boot

.drone.yml

@@ -31,6 +31,7 @@ steps:
       - go build -o out/inotify cmd/inotify/inotify.go
       - go build -o out/gui cmd/gui/gui.go
       - go build -o out/fan cmd/fan/fan.go
+      - go build -o out/hdmi cmd/hdmi/hdmi.go
       - cp CHANGELOG.md out/
   - name: gitea-release
     image: plugins/gitea-release

cmd/hdmi/README.md

@@ -0,0 +1,3 @@
+# hdmi
+
+This is the source for the screen on/off tool. systemd timers are great but if the system auto-reboots overnight for update purposes the screen will remain on post-boot. This tool will ensure the screen turns back off if a PiFrame is rebooted during off hours.

cmd/hdmi/hdmi.go

@@ -0,0 +1,91 @@
+package main
+
+import (
+	"log"
+	"strconv"
+	"strings"
+	"time"
+	"os/exec"
+
+	"git.kemonine.info/PiFrame/config"
+)
+
+const (
+	CMD_VCGENCMD = "/opt/vc/bin//vcgencmd"
+	CMD_VCGENCMD_DISPLAY_POWER = "display_power"
+)
+
+func main() {
+	// Load the config file
+	pfConfig, _ := config.LoadConfig()
+	pfConfig.Print()
+
+	// Read config values
+	hdmiOn := pfConfig.String(config.CONFIG_KEY_HDMI_ON)
+	hdmiOff := pfConfig.String(config.CONFIG_KEY_HDMI_OFF)
+
+	// Strip off systemd stuff we don't care about for this purpose
+	hdmiOn = strings.TrimLeft(hdmiOn, "*-*-* ")
+	hdmiOnSplit := strings.Split(hdmiOn, ":")
+
+	// Split the config into hours/minutes/seconds
+	hdmiOff = strings.TrimLeft(hdmiOff, "*-*-* ")
+	hdmiOffSplit := strings.Split(hdmiOff, ":")
+
+	log.Print(hdmiOnSplit)
+	log.Print(hdmiOffSplit)
+
+	// Parse hdmi on hours/minutes/seconds into ints so they can be used to create real date/time
+	hdmiOnHour, err := strconv.Atoi(hdmiOnSplit[0])
+	if err != nil {
+		log.Fatalf("Could not parse hdmi on hour : %s", err)
+	}
+	hdmiOnMinute, err := strconv.Atoi(hdmiOnSplit[1])
+	if err != nil {
+		log.Fatalf("Could not parse hdmi on minute : %s", err)
+	}
+	hdmiOnSecond, err := strconv.Atoi(hdmiOnSplit[2])
+	if err != nil {
+		log.Fatalf("Could not parse htmi on second : %s", err)
+	}
+
+	// Parse hdmi off hours/minutes/seconds into ints so they can be used to create real date/time
+	hdmiOffHour, err := strconv.Atoi(hdmiOffSplit[0])
+	if err != nil {
+		log.Fatalf("Could not parse hdmi off hour : %s", err)
+	}
+	hdmiOffMinute, err := strconv.Atoi(hdmiOffSplit[1])
+	if err != nil {
+		log.Fatalf("Could not parse hdmi off minute : %s", err)
+	}
+	hdmiOffSecond, err := strconv.Atoi(hdmiOffSplit[2])
+	if err != nil {
+		log.Fatalf("Could not parse hdmi off second : %s", err)
+	}
+
+	// Setup date/time vars for comparison
+	currentTime := time.Now()
+	hdmiOnTime := time.Date(currentTime.Year(), currentTime.Month(), currentTime.Day(), hdmiOnHour, hdmiOnMinute, hdmiOnSecond, 0, currentTime.Location())
+	hdmiOffTime := time.Date(currentTime.Year(), currentTime.Month(), currentTime.Day(), hdmiOffHour, hdmiOffMinute, hdmiOffSecond, 0, currentTime.Location())
+
+	log.Print(currentTime)
+	log.Print(hdmiOnTime)
+	log.Print(hdmiOffTime)
+
+	// Turn on/off screen depending on current time
+	vcgencmdOnOffFlag := "-1"
+	if currentTime.After(hdmiOnTime) && currentTime.Before(hdmiOffTime) {
+		log.Print("Turning ON screen")
+		vcgencmdOnOffFlag = "1"
+	}
+	if currentTime.After(hdmiOffTime) && currentTime.Before(hdmiOnTime) {
+		log.Print("Turning OFF screen")
+		vcgencmdOnOffFlag = "0"
+	}
+
+	hdmiControl := exec.Command(CMD_VCGENCMD, CMD_VCGENCMD_DISPLAY_POWER, vcgencmdOnOffFlag)
+	err = hdmiControl.Run()
+	if err != nil {
+		log.Fatalf("Error turning display on/off (%s) : %s", vcgencmdOnOffFlag, err)
+	}
+}