PIC USB implementation

Ok, I now have USB working using TMR1 interrupt. Thanks for all the bits of info guys. Piecing them all together helped me get it working

nice one glad you got it working!
regards jason

Simple and fast use a usb chip ftdi ( www.ftdichip.com) few dollars and connect this to Pic's serialport at baudrate at the pc site it will act like a virtual comport.
Use bitbang output if you do not have a usart in Pic.
Use high speed to avoid collisions at the measure loop.