Dear forum, I am running Debian 3.8.24-bone67 w/Xenomai.
I have successfully used the sysfs for generating a PWM signal on the P8_13 pin for several days now by: 1. Adding the am33xx_pwm and bone_pwm_P8_13 overlay files. 2. Writing to the files in the /sys/devices/ocp.3/pwm_test_P8_13.*/ (period, duty, polarity and run). However, I had a system crash. Now, despite rebooting (+re-powering) I am not able to re-establish the situation. The overlay files seem to install. The pwm_test_P8_13.12/ directory appears, but the files for controlling the PWM is missing. I can remove and re-apply the overlays, but the files are still missing Something has obviously changed by the system crash. Please advice. Best regards Terje Froysa [ 91.601978] bone-capemgr bone_capemgr.9: part_number 'am33xx_pwm', version 'N/A' [ 91.610962] bone-capemgr bone_capemgr.9: slot #12: generic override [ 91.617590] bone-capemgr bone_capemgr.9: bone: Using override eeprom data at slot 12 [ 91.625705] bone-capemgr bone_capemgr.9: slot #12: 'Override Board Name,00A0,Override Manuf,am33xx_pwm' [ 91.635790] bone-capemgr bone_capemgr.9: slot #12: Requesting part number/version based 'am33xx_pwm-00A0.dtbo [ 91.646178] bone-capemgr bone_capemgr.9: slot #12: Requesting firmware 'am33xx_pwm-00A0.dtbo' for board-name 'Override Board Name', version '00A0' [ 91.661239] bone-capemgr bone_capemgr.9: slot #12: dtbo 'am33xx_pwm-00A0.dtbo' loaded; converting to live tree [ 91.672375] bone-capemgr bone_capemgr.9: slot #12: #8 overlays [ 91.683550] ehrpwm 48300200.ehrpwm: unable to select pin group [ 91.698871] ecap 48300100.ecap: unable to select pin group [ 91.714483] ehrpwm 48302200.ehrpwm: unable to select pin group [ 91.730620] ehrpwm 48304200.ehrpwm: unable to select pin group [ 91.746145] ecap 48304100.ecap: unable to select pin group [ 91.759347] bone-capemgr bone_capemgr.9: slot #12: Applied #8 overlays. [ 103.923016] bone-capemgr bone_capemgr.9: part_number 'bone_pwm_P8_13', version 'N/A' [ 103.931873] bone-capemgr bone_capemgr.9: slot #13: generic override [ 103.938516] bone-capemgr bone_capemgr.9: bone: Using override eeprom data at slot 13 [ 103.946631] bone-capemgr bone_capemgr.9: slot #13: 'Override Board Name,00A0,Override Manuf,bone_pwm_P8_13' [ 103.957008] bone-capemgr bone_capemgr.9: slot #13: Requesting part number/version based 'bone_pwm_P8_13-00A0.dtbo [ 103.967782] bone-capemgr bone_capemgr.9: slot #13: Requesting firmware 'bone_pwm_P8_13-00A0.dtbo' for board-name 'Override Board Name', version '00A0' [ 103.983070] bone-capemgr bone_capemgr.9: slot #13: dtbo 'bone_pwm_P8_13-00A0.dtbo' loaded; converting to live tree [ 103.994506] bone-capemgr bone_capemgr.9: slot #13: #2 overlays [ 104.005298] bone-capemgr bone_capemgr.9: slot #13: Applied #2 overlays. root@beaglebone:/home/debian# ls /sys/devices/ocp.3/pwm_test_P8_13.12/ modalias power subsystem uevent root@beaglebone:/sys/kernel/debug# cat pwm platform/48304100.ecap, 1 PWM device pwm-0 ((null) ): platform/48304200.ehrpwm, 2 PWM devices pwm-0 ((null) ): pwm-1 ((null) ): platform/48302200.ehrpwm, 2 PWM devices pwm-0 ((null) ): pwm-1 ((null) ): platform/48300100.ecap, 1 PWM device pwm-0 ((null) ): platform/48300200.ehrpwm, 2 PWM devices pwm-0 ((null) ): pwm-1 ((null) ): root@beaglebone:/sys/kernel/debug# -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
