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ardupilot/libraries/AP_HAL_Linux/PRU/Readme.md
Siddharth Bharat Purohit 731d80e6c5 HAL_Linux: Add Steps to Manually test pwm channels
2014-07-14 09:10:13 +10:00

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Steps to manually test PRU PWM:

1.  cp test_overlays/BB-BONE-PRU-05-00A0.dtbo /lib/firmware/
2.  cp firmware/testpru0 firmware/testpru1 /lib/firmware/
3.  echo BB-BONE-PRU-05 > /sys/devices/bone_capemgr.#/slots
4.  cd /sys/class/pwm/
5.  echo # > export       e.g. "echo 1 > export" to activate PRU_R30 pin1 as pwm
6.  cd pwm1/
7.  echo 1100000 > duty_ms
8.  echo 20000000 > period_ms
9.  echo 1 > run

Note: The above example will produce pwm signal with on time 1100ms and frequency 50Hz