kutalinelucas
New Member
hi.
Im trying to design a custom USB keyboard to use with my PDA running mobile 5.0.
there are 5 push switches being fed into a pic ic, through some manipulation these 5 switches can hold 32 different possibilities which i'd like to use as 32 different key presses as a standard keyboard would.
All of the OTG purpose built keyboard controllers i have found are compatible with a standard keyboard matrix, usually 9x18.
Does anybody have any ideas how i would go about interfacing the output of the pic to the keyboard controller?
i could output to say a 6x6 matrix, but because there is no physical closing of the contacts how would this work? (use some hall effect ic(???)) or would i need to to use a usb interface chip and a seperate processor?
Any direction would be greatly appriciated.
Im trying to design a custom USB keyboard to use with my PDA running mobile 5.0.
there are 5 push switches being fed into a pic ic, through some manipulation these 5 switches can hold 32 different possibilities which i'd like to use as 32 different key presses as a standard keyboard would.
All of the OTG purpose built keyboard controllers i have found are compatible with a standard keyboard matrix, usually 9x18.
Does anybody have any ideas how i would go about interfacing the output of the pic to the keyboard controller?
i could output to say a 6x6 matrix, but because there is no physical closing of the contacts how would this work? (use some hall effect ic(???)) or would i need to to use a usb interface chip and a seperate processor?
Any direction would be greatly appriciated.