the values in /sys/devices/ocp.3/pwm_test_P8_13/11 are: duty 0 period 500000 polarity 1 run 1 after the device tree overlay is loaded. Does anyone know if possible and if yes how to change them (the default values)? The changes to corresponding *.dtbo file doesn't change them.
On Monday, 24 November 2014 09:58:19 UTC+11, janszyma...@gmail.com wrote: > > Hi, > > I'm trying to use pwm on BBB > Linux beaglebone 3.8.13-bone50 #1 SMP Tue May 13 13:24:52 UTC 2014 armv7l > GNU/Linux > I have modified uEnv.tx > ... > > cape_enable=capemgr.enable_partno=BB-UART1,SPI-4SS,bone_eqep2b,bone_pwm_P8_13,am33xx_pwm > ... > and /etc/default/capemgr > ... > # Options to pass to capemgr > CAPE=SPI-4SS,bone_eqep2b,bone_pwm_P8_13,am33xx_pwm > ... > > after booting I have correctly in slots > 0: 54:PF--- > 1: 55:PF--- > 2: 56:PF--- > 3: 57:PF--- > 4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G > 5: ff:P-O-L Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI > 7: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-UART1 > 10: ff:P-O-L Override Board Name,00A0,Override Manuf,bone_pwm_P8_13 > 11: ff:P-O-L Override Board Name,00A0,Override Manuf,am33xx_pwm > 12: ff:P-O-L Override Board Name,00A0,Override Manuf,SPI-4SS > 13: ff:P-O-L Override Board Name,00A0,Override Manuf,bone_eqep2b > > and pwm works, but, > > - after power on the logic level on P8_13 is low (as I want it to be) > - after that (loading dtc overlay) the logic level on P8_13 become high (I > dont want it) > > My attempt to modify /lib/firmware/bone_pwm_P8_13-00A0.dts and then > recompiling doesn't effect any of: > /sys/devices/ocp.3/pwm_test_P8_13.11/ duty, period, polarity, run, .... > > As I don't want the motor connected to PWM to run, before the applications > takes over the control, > can anyone help me to achieve it? > > Jan > > > > -- 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.
