I am trying to send 30us PWM signals to the KISS 24A ESCs, but the pulses are not recognized by the ESC. The tolerance is +/- 2us. However, 900us for arming, 1000us for start and up to 2000us work just fine.
Any suggestions on how to get 30us PWM signals on Navio2?
I am using Navio2, a Raspberry Pi 3, and the examples provided in the Navio2 emlid repo. The servo frequency is 400Hz.
The 30us PWM signals worked on Navio+ which uses PCA9685 for PWM output.
Edit: Figured I could update the rcio code via emlidtool and see if it fixes the issue with the 30us PWM signals. This gives an error, because /sys/kernel/rcio/status/crc is not existing. I am using a freshly installed raspbian version 4.4.36-a7765e7-emlid-v7+. I need Jessie instead of Stretch, because of other dependencies, e.g. libcrypto1.0.0.
Edit2: Tried to compile rcio-dkms-0.8.3 and also 0.9.0 on the pi, which both failed with
include/linux/ratelimit.h:31:9: error: initializer element is not constant
struct ratelimit_state name =
Edit3: switched to raspbian stretch emlid image. Have now the latest rcio firmware v1.0 and the rcio kernel module 0.9.0 installed. Still, no PWM pulses with 30ns possible!