leaflabs
Maple doing 290ns GPIO Bit Banging
Should really be able to get up to many MHz using optimized assembly (limited by peripheral clock, not the faster 72MHz CPU clock as you might expect). This shot taken from output from our handy dandy interactive hardware test program: gist.github.com/380091
Fair amount of voltage jump on the transitions. Possibly exacerbated by el cheapo scope probes attached to flying test leads...
Maple doing 290ns GPIO Bit Banging
Should really be able to get up to many MHz using optimized assembly (limited by peripheral clock, not the faster 72MHz CPU clock as you might expect). This shot taken from output from our handy dandy interactive hardware test program: gist.github.com/380091
Fair amount of voltage jump on the transitions. Possibly exacerbated by el cheapo scope probes attached to flying test leads...