vinymeuh / radiogagad

The daemon inside my RaspDAC

radiogagad - the daemon inside my RaspDAC

Build and install

First you need a Go distribution. Then on the build host, targeting a Raspberry Pi 3

make buildarm7

Install by simply copy the binary under /usr/local/bin and setup the service for the service manager used by the distribution

• For systemd: radiogagad.service
• For OpenRC: radiogagad.service

Configuration

Configuration is loaded from /etc/radiogagad.yml if file exists. See radiogagad.yml.template for configuration variables names and their default values.

Inspirations, links and references

RaspDAC pinout

Power Button

1. BOOT OK pin must be set to high to stop power button flashes
2. Soft Shutdown pin must be set to low
3. Wait for rising edge on Shutdown pin
4. When button fired, set Soft Shutdown pin to high for 1 second then low to trigger the power off

Examples:

• Implementation by Audiophonics
• Implementation by fengalin

MPD

• MPD Protocol Specification

Winstar OLED WEH001602A

• HD44780U Hitachi Datasheet
• Winstar_GraphicOLED.py
• Wikipedia article for Hitachi HD44780 LCD controller
• Adafruit_CharacterOLED
• Interfacing 16x2 LCD with Raspberry Pi using GPIO & Python

radiogagad's Issues

radiogagad crash on stopping mpd

radiogaga:~# service mpd stop
 * Stopping mpd ...
radiogaga:~# service radiogagad status
 * status: crashed

In /var/log/messages:

May  9 21:07:01 radiogaga daemon.err radiogagad: panic: runtime error: invalid memory address or nil pointer dereference
May  9 21:07:01 radiogaga daemon.err radiogagad: [signal SIGSEGV: segmentation violation code=0x1 addr=0x20 pc=0x14d14c]
May  9 21:07:01 radiogaga daemon.info radiogagad: Failed to retrieve MPD Status: EOF
May  9 21:07:01 radiogaga daemon.info radiogagad: Failed to retrieve MPD CurrentSong: write tcp 127.0.0.1:54148->127.0.0.1:6600: write: broken pipe
May  9 21:07:01 radiogaga daemon.err radiogagad: goroutine 23 [running]:
May  9 21:07:01 radiogaga daemon.err radiogagad: github.com/vinymeuh/radiogagad/player.MPDFetcher(0x1932da, 0xe, 0x8a6f00, 0x8a6ec0)
May  9 21:07:01 radiogaga daemon.err radiogagad: 	/Users/viny/MyWorkdir/radiogagad/player/mpdfetcher.go:42 +0x21c
May  9 21:07:01 radiogaga daemon.err radiogagad: created by main.main
May  9 21:07:01 radiogaga daemon.err radiogagad: 	/Users/viny/MyWorkdir/radiogagad/main.go:65 +0x3dc