How Sean gets ready for RPi k-deving & How Sean started the skeleton of the hardware PWM kernel module. But wait, there’s more! Poking at /dev/mem – hacking without a net! Before writing up the PWM kernel module, Sean wanted to spend some user-space time prodding the registers for PWM. The fastest way to do this is to simply open up /dev/mem and index to the PWM control registers. This isn’t for the faint-of-heart, as a little incorrect math and you can possibly bork your Pi installation but it is as fast & furious as it gets with embedded Linux.

Each Friday is PiDay here at Adafruit, be sure to check out our posts, tutorials and new Raspberry Pi related products. Have you tried the new “Adafruit Raspberry Pi Educational Linux Distro” ? It’s our tweaked distribution for teaching electronics using the Raspberry Pi.

Want a FREE Raspberry Pi? For limited time and while supplies last – Adafruit is including a FREE Raspberry Pi in all orders over $350 (not including shipping). This offer is for online customers only, not distributors/resellers/hackerspaces.