By 'this', I mean the following:
config-pin P9.14 pwm
cd /sys/devices/platform/ocp/48302000.epwmss/48302200.pwm/pwm/pwmchip*/
echo 0 > export
echo 20000 > pwm*/period
echo 10000 > pwm*/duty_cycle
echo 1 > pwm*/enable
On Thursday, March 28, 2019 at 10:48:18 AM UTC-5, Paul Steinke wrote:
>
> How would I write this in C Source code on the ARM, instead of writing it
> in a terminal command window through SSH?
>
>
>
> On Friday, July 6, 2018 at 4:53:28 PM UTC-5, RobertCNelson wrote:
>>
>> On Fri, Jul 6, 2018 at 2:42 PM, <[email protected]> wrote:
>> > Hi Robert,
>> >
>> > I've tried your solution by typing : sudo sh -C "echo 'bone_pwm_P9_14'
>> >
>> > /sys/devices/platform/bone_capemgr/slots"
>> > But it didn't work. I have the following error : sh: 0: Can't open echo
>> > 'bone_pwm_P9_14' >/sys/devices/platform/bone_capemgr/slots
>> >
>> > I just want to control the PWM module from pin P9_14. How can I do that
>> in
>> > the latest debian image ?
>>
>> The slots file is long gone..
>>
>> You should be able to just do:
>>
>> config-pin P9.14 pwm
>>
>> Then
>>
>> cd /sys/devices/platform/ocp/48302000.epwmss/48302200.pwm/pwm/pwmchip*/
>>
>> echo 0 > export
>> echo 20000 > pwm*/period
>> echo 10000 > pwm*/duty_cycle
>> echo 1 > pwm*/enable
>>
>> If that doesn't work, run:
>>
>> sudo /opt/scripts/tools/version.sh
>>
>> and we can see what's not fully configured..
>>
>> Regards,
>>
>> --
>> Robert Nelson
>> https://rcn-ee.com/
>>
>
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