IQaudIO useful tools / sample code etc.

Compilation instructions are in each file's header.

Precompiled versions also included.

To check that utilities that change volume are working as expected please open another window and launch alsamixer. Check that the mixer control's volume is changing when rotating the rotary encoder or pressing the up/down buttons of your IR handset.

Adjusts ALSA volume (based on Left channel value) up or down to correspond with rotary encoder direction.

$ sudo IQ_rot &

Adjusts ALSA volume (based on Left channel value) up or down to correspond with IR inputs for KEY_VOLUMEUP and KEY_VOLUMEDOWN, also takes KEY_MUTE input.

• assumes IQAUDIO.COM Pi-DAC volume range -103dB to 4dB
• USES Raspberry Pi GPIO 25

$ sudo IQ_ir &

Adjust ALSA volume by means of rotary encoder

Control system via rotary encoder button press

• click -> toggle mute state
• hold -> shutdown the pi

Supports 3 additional press buttons Supports 3 additional LEDs (by default pressing one of the 3 button's iluminates that button's LED)

NOTE: OLED Support for CosmicController here: https://github.com/iqaudio/pyMOD-OLED

Key press detect code, uses gpio 27 and ground to a momentary switch. If pressed for more than 1sec but (less than 5) it will force a reboot. If pressed for more than 5 seconds it will force a shutdown

Sample code to set the IQaudio mixer settings correctly for 2vRMS output. Also sets GPIO22 to unmute the AMP+ or DigiAMP+ if being used.