Pi Model 2B and Navio2. Down loaded image 3 times and the PWM directory (/sys/class/pwm) is empty. Servo example will not run and ARDUPilot does not run. LED, IMU, GPS and BARO seem to work.
Did you fix Navio to Raspberry with screws?
Please run the following command and post the results:
sudo cat /sys/kernel/rcio/status/alive
Yes, the Navio is fixed to the Raspberry Pi with screws.
The command came back with:
cat: /sys/kernel/rcio/status/alive: No such file or directory
Where did you download the image? In our docs?
Please run this command and post its output:
uname -a
And then:
lsmod
Downloaded the image from here: https://docs.emlid.com/navio2/Navio-APM/configuring-raspberry-pi/
Output of uname -a is:
Linux navio 4.4.6-4d0ae01-emlid-v7+ #3 SMP PREEMPT Wed Apr 6 13:25:26 MSK 2016 armv7l GNU/Linux
Output of lsmod is:
Module Size Used by
cpufreq_stats 3463 0
cfg80211 438534 0
rfkill 15930 1 cfg80211
evdev 11104 2
rcio_spi 2576 0
rcio_core 2231 1 rcio_spi
rcio_rcin 2184 1 rcio_core
rcio_adc 1556 1 rcio_core
rcio_pwm 2711 1 rcio_core
rcio_status 1545 1 rcio_core
i2c_bcm2708 4770 0
bcm2835_gpiomem 3036 0
spi_bcm2835 7222 0
spi_bcm2835aux 4779 0
bcm2835_wdt 3225 0
uio_pdrv_genirq 3100 0
uio 8256 1 uio_pdrv_genirq
i2c_dev 5859 0
This is a really strange behavior. Do you have another Raspberry Pi to try with?
Could you please run dmesg | grep rcio. This might help us debug your problem.
rcio:probe of spi1.0 failed with error -16.
Hello, David!
Is this thing still bugging you?