RESISTIVE RUBBER RIBBON >>> AIN

Design Concepts
1

Hi there!

I got my hands on a broken CASIO DG20 I’m currently “MIDIBOXING”

The rubber fretboard conducts electricity and resistance varies proportionaly to distance between 2 probes!!

So it looks like I’ve got a Ribbon controller here!!

Here is the problem so far:

I’m using the AIN_VALUE_7BIT function to define a lader for the notes but in 7bit, the resolution is too small, thus causing fret to play neighboor notes randomly.

Is there a method to convert the AIN reading into a 0–>255 resolution rather than 0–>127 or possibly even higher?

I could monitor the readings on an lcd and therefore have a more precise design!

Thanks for any help as I’m still beginning PIC MATHS!

Alex

2

If you use the MIOS_AIN_PinGet function you will get the full resolution of the ADC (10Bit).

Raphael

3

Hi Raphael,

thanks for the hint!

Could you tell me which function to use to display the entire 10bit number on lcd for further comparing/handling?

thanks

Alkex

4

I would try MIOS_LCD_PrintBCD4 (but I never used it myself).

5

thanks but I dont really know how to work with numbers higher than 255…

I’ll try to experiment differant ways…

all the best!

6

Try the C wrapper, the programming effort will be much lower

Best Regards, Thorsten.

7

Hi thorsten,

I was thinking about that for some time, but never had the courage to “make the leap”  ::slight_smile:

I’ll give it a shot!

Best regards

Alex