We made a small update of the white paper for the infrared subsystem:

http://neo900.org/stuff/papers/ir.pdf

The changes:

- the IR logic is now controlled through an I2C-accessible register in the logic chip (Silego), not through GPIOs
- the receiver is designed to filter at 30 Hz, not 10 Hz
- added slew rate control for the transmit LED
- added an analog switch to completely disable the receiver

These changes have already been incorporated in the schematics.

This specific version is at
https://neo900.org/stuff/papers/ir-20161222.pdf

The source can be found at
https://neo900.org/git/misc/tree/ir

- Werner