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Advice needed for making GamePad with PIC16F877A

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Hello all,
I would like suggestions/advices/tips for making a gamepad with PIC16F877A controller. I am planning to have atleast 20 buttons and 2 or 4 potentiometers(Joystick) for the gamepad with USB interface.

So, Can anyone tell me is this is possible with PIC16F877A.
Secondly, Where can I find information about writing an USB interface for the PC end ?

I am planning this because almost all the gamepads/joysticks available in the market have some feature or the other missing.

Thanks in advance.
 


4*5 buttons like a matrix keypad of RB[4:7] matrix with RD[0:4]. Take RA0,1,2,3 as the ADC input for potentiometers.

USB device for HID class. May use external USB transceiver like the one described at www.beyondlogic.org (I2C) bus interface with PIC 16F877A.

John
 

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