piframe-go/cmd/fan/fan.go

118 lines
3.1 KiB
Go

package main
import (
"log"
"os"
"os/signal"
"syscall"
"time"
argonFan "git.sungo.io/sungo/argon/fan"
"git.kemonine.info/PiFrame/config"
"git.kemonine.info/PiFrame/utils"
)
const (
BUS = 1
ADDRESS = 0x1a
)
func main() {
// Load the config file
pfConfig, configFileProvider := config.LoadConfig(false)
// Watch for config changes and re-load config if needed
configFileProvider.Watch(func(event interface{}, err error) {
if err != nil {
log.Printf("Error setting up watch of config : %s", err)
return
}
// Bail on slideshow if there is a config change so it restarts with updated config
log.Fatalf("Config file changed! Exiting!")
})
// Get the various fan related config options as local variables
POLL_INTERVAL := pfConfig.String(config.CONFIG_KEY_FAN_POLL_INTERVAL)
SPEED_FULL_TEMP := pfConfig.Float64(config.CONFIG_KEY_FAN_SPEEDS + "." + config.CONFIG_MAP_KEY_FAN_SPEED_100)
SPEED_SEVENTY_FIVE_PERCENT_TEMP := pfConfig.Float64(config.CONFIG_KEY_FAN_SPEEDS + "." + config.CONFIG_MAP_KEY_FAN_SPEED_75)
SPEED_FIFTY_PERCENT_TEMP := pfConfig.Float64(config.CONFIG_KEY_FAN_SPEEDS + "." + config.CONFIG_MAP_KEY_FAN_SPEED_50)
SPEED_TWENTY_FIVE_PERCENT_TEMP := pfConfig.Float64(config.CONFIG_KEY_FAN_SPEEDS + "." + config.CONFIG_MAP_KEY_FAN_SPEED_25)
SPEED_MINIMUM := pfConfig.Int(config.CONFIG_KEY_FAN_MIN_SPEED)
// Setup fan and bail if we can't see it
fan, err := argonFan.New(ADDRESS, BUS)
if err != nil {
log.Fatalf("Error working with fan : %s", err)
}
// Safe exit
defer fan.SafeClose()
sigc := make(chan os.Signal, 1)
signal.Notify(
sigc,
syscall.SIGHUP,
syscall.SIGINT,
syscall.SIGTERM,
syscall.SIGQUIT,
)
go func() {
<-sigc
fan.SafeClose()
os.Exit(1)
}()
// Control fan speed based on temps via a ticker / timeout
pollInterval, err := time.ParseDuration(POLL_INTERVAL)
if err != nil {
log.Fatalf("Error parsing interval duration : %s", err)
}
ticker := time.NewTicker(pollInterval)
for range ticker.C {
cpuTemp := utils.GetCPUTemp()
gpuTemp := utils.GetGPUTemp()
if cpuTemp >= SPEED_FULL_TEMP || gpuTemp >= SPEED_FULL_TEMP {
if SPEED_MINIMUM > 100 {
fan.SetSpeed(SPEED_MINIMUM)
} else {
fan.SetSpeed(100)
}
continue
}
if cpuTemp >= SPEED_SEVENTY_FIVE_PERCENT_TEMP || gpuTemp >= SPEED_SEVENTY_FIVE_PERCENT_TEMP {
if SPEED_MINIMUM > 75 {
fan.SetSpeed(SPEED_MINIMUM)
} else {
fan.SetSpeed(75)
}
continue
}
if cpuTemp >= SPEED_FIFTY_PERCENT_TEMP || gpuTemp >= SPEED_FIFTY_PERCENT_TEMP {
if SPEED_MINIMUM > 50 {
fan.SetSpeed(SPEED_MINIMUM)
} else {
fan.SetSpeed(50)
}
continue
}
if cpuTemp >= SPEED_TWENTY_FIVE_PERCENT_TEMP || gpuTemp >= SPEED_TWENTY_FIVE_PERCENT_TEMP {
if SPEED_MINIMUM > 25 {
fan.SetSpeed(SPEED_MINIMUM)
} else {
fan.SetSpeed(25)
}
continue
}
if cpuTemp < SPEED_TWENTY_FIVE_PERCENT_TEMP || gpuTemp < SPEED_TWENTY_FIVE_PERCENT_TEMP {
fan.SetSpeed(SPEED_MINIMUM)
continue
}
// We should never get here but...
// Maxing fan to be on the safe side
log.Print("pf-fan : This should never happen")
fan.SetSpeed(100)
}
}