Guitar tuner for PIC based core

[rmouneyres]

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.

 

I've found this in the forum but this is standalone project : 

 

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

[nILS]

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 ;-)

[rmouneyres]

OK thanks for the reply, i get the scheme for coding it... if my skills are able to do it  :sheep:

I just wonder if we can handle the interrupts directly with MIOS already "installed", need further investigation !

Edited January 19, 2013 by rmouneyres