Sample code for most PIC18F4520 operations

Find the code samples for all of these and more at http://peshkin.mech.northwestern.edu/pic/code

These will/should also have wiki pages for background and associated electronics:

DigitalIO Digital input and output bit-by-bit or byte-by-byte

AnalogInput Reading up to twelve Analog Inputs

Counter0 Counting pulses with Timer0

Counter1 Counting pulses with Timer1

MotorPWM PWM outputs for torque control of one or two DC motors; Timer 2

RS232com Serial RS232 communication between PIC and a text window

Interrupt0 Periodic servo cycles using interrupt routines, 10mS & slower; Timer 0

Interrupt2 Periodic servo cycles using interrupt routines; 10mS & faster; Timer 2

InterruptExternal Interrupts generated by an external pulse

RCservoSoft PWM output in software for position control of up to five RC servos; Timer 3

RCservoHard PWM output in hardware for position control of up to two RC servos; Timer 2

QuadratureSoft Quadrature decoder/counter in software for arbitarily many encoders; 1KHz max

QuadratureHard Quadrature decoder/counter in hardware for one arbitrarily fast encoder; Timers 0 and 1

Not available yet:

AnalogOutputParallel Analog output using 8 digital lines

AnalogOutputI2C Analog output using I2C serial

Printing to a serial LCD

Printing to a parallel LCD

PIC-to-PIC communication

Zigbee radio communication

Modulated IR communication

Strobing LEDs or IREDs for better range and immunity to background light

I2C communication

CAN bus

Capturing data to Matlab

Running stepper motors