PWM control: channel B didn't appeared in sysfs after canging pin mode
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Pavel Yermolenko
Sep 15, 2020, 3:02:20 PM9/15/20
to BeagleBoard
Hello,
I connected two pins on P9 header to EHRPWM0 peripheral (channels A and B).
Channel A is visible whereas B not.
debian@beaglebone:/sys/class/pwm/pwmchip1$ sudo show-pins | sort
......
P9.21 / spi boot in 85 fast rx down 3 pwm 0 out B ocp/P9_21_pinmux (pinmux_P9_21_pwm_pin)
P9.22 / spi boot clk 84 fast rx down 3 pwm 0 out A ocp/P9_22_pinmux (pinmux_P9_22_pwm_pin)
......
P9.22 / spi boot clk 84 fast rx down 3 pwm 0 out A ocp/P9_22_pinmux (pinmux_P9_22_pwm_pin)
......
debian@beaglebone:/sys/class/pwm/pwmchip1$ ls
device export npwm power pwm-1:0 subsystem uevent unexport
debian@beaglebone:/sys/class/pwm/pwmchip1$
device export npwm power pwm-1:0 subsystem uevent unexport
debian@beaglebone:/sys/class/pwm/pwmchip1$
pwm-1:1 is missed. Why ?
Sincerely,
Pavel.
Robert Nelson
Sep 15, 2020, 4:48:01 PM9/15/20
to Beagle Board
debian@bbb-pwr01-ser09:/sys/class/pwm/pwmchip1$ echo 0 > export
debian@bbb-pwr01-ser09:/sys/class/pwm/pwmchip1$ echo 1 > export
Regards,
--
Robert Nelson
https://rcn-ee.com/
Pavel Yermolenko
Sep 15, 2020, 5:31:35 PM9/15/20
to BeagleBoard
Thanks !
On Tuesday, September 15, 2020 at 10:48:01 PM UTC+2, RobertCNelson wrote:
On Tuesday, September 15, 2020 at 10:48:01 PM UTC+2, RobertCNelson wrote:
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