Tk1 Pwm3 enable problem

Technical Support
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1

Hello, i am working on Apalis TK1 I have a qt application however it can not read pwm3

Error while opening the file.|filePath: "/sys/class/pwm/pwmchip0/pwm3/enable"
Error while opening the file.|ffilePath: "/sys/class/pwm/pwmchip0/pwm3/period"
Error while opening the file.|filePath: "/sys/class/pwm/pwmchip0/pwm3/duty_cycle"

If i try to enable pwm3

# echo 3 >export 
sh: write error: Device or resource busy

i get this error. How can i solve it thank you

2

HI @alimert

Thanks for writing to the Toradex Support.

Could you provide the version of the hardware and software ( uname -a ) of your module?

Thanks and best regards,
Jaski

3

Linux buildroot 3.10.40 #1 SMP PREEMPT Tue Jul 14 09:25:53 EEST 2020 armv7l GNU/Linux

4

Hi @alimert

We are not supporting buildroot. Could you try one of Toradex’s regular Bsp 3.0.4 and check if you can reproduce the issue?

Best regards,
Jaski