Hello,
I’ve almost finished a guitar fx looper (which would need a major wiki update…), and i’m wondering if i could add a tuner to this box. As i’m not using any AIN, i have all the analog pins free to use. I think that the 10bits conversion is enough to have the guitar signal.
http://discourse.midibox.org/t/topic/10844
The code for the fx switcher is pretty small, and written in C. So i guess there is room for the tuner code.
Is there any code block known that i could use ?
thanks
There’s really not any voodoo in the tuner software. An interrupt gets called whenever the input pin changes, the number of changes per $time get counted and that determines the frequency, which is checked against a preset table. The distance to the closest note and that note are displayed and that’s it. The whole thing was done in asm and isn’t commented, so I don’t think it’ll be a great help 
OK thanks for the reply, i get the scheme for coding it… if my skills are able to do it 
I just wonder if we can handle the interrupts directly with MIOS already “installed”, need further investigation !
