I've just finished testing the USB-Serial cable, and it appears to be working.
I've hooked it up TX-RX, RX-TX, GND-GND to a PC serial port (Real hardware kind) and I can send and recieve data to and from the device without any form of corruption.
Which brings me back to my original query... are the pullup's in the PIC breaking my serial communications?
If so, can anyone come up with a simple way to re-do the input detection of the buttons? (I have spare pins on the pic if that helps)
Edit:
Actually I think I found the answer to my problem "The HW USART output is inverted as it is designed to work with an RS232 driver." that means I must have built my FT232 circuit to use the inverted output/input (the FT232 chip is very smart, I just don't remember doing that...) I haven't been using a max232 chip on this project because the voltages were within tolerance, and I just don't have the room... maybe I'll have to build an external serial adapter...
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