Dimm two LEDs with inverted phase using PWM pins of a PIC18F4525 MCU.
This function works in a similar way as analogWrite() in Arduino.
PIC18F4525 MCU has two ports capable of generating PWM output: CCP1 (pin 17) and CCP2 (pin 16) which can be used independently. Here, I use them both at the same time in inverted phase mode to control the brightness of two LED's simultaneously in an infinite loop: while the average voltage at CCP1 increments, the average voltage at CCP2 decrements and vice versa.
This code assumes that your timer settings are:
OSCCON = 0b01110100; // Internal oscillator (INTIO67) to 8MHz stable.
T0CON = 0X87; // TMR0 on, 16bit with max divide rate freq of 7812.5Hz
For the complete configuration I used, see header files.
A function similar to delay() in arduino and a Makefile for compiling from the command line without MPLAB X IDE.
All code is C.