I am looking at developing an accessory for the Palm PDAs and I realized that the most common interface on all the different models is the IR port. The serial port was dropped in favor of USB on the newer units and the older units don't have USB. Only a few models have bluetooth. But they all have IR, right?
This is not a mass market accessory I need, but rather something that will appeal to a smaller audience. However, the range of units they will be using is wide. So I need a very generic interface.
If I wanted to build an MCU with an IR interface to talk to a Palm, where do I get the spec on the interface. I did some searching on Google and I guess I am not using the right keywords. I get many hits, but they are mostly sellers of accessories. Anyone know where to start with an effort like this? Is the IR protocol a standard with a spec. Is there at least a spec for the Palm IR protocol?