imx6ull PWM interrupt

alvenwu — Tue, 09 Apr 2019 10:13:48 GMT

Hi I tried to use PWM interrupt handler to chang the duty cycle values after PWM initialization configuration on imx 6ull . everytime， it could enter into the FIFo empty interrupt and change the duty value in it.

but seems the output is not like the duty cycle Valule as setting. and in Linux ，the PWM driver is using sdma to change the duty ，could we use the PWM FIFO interrupt or roller interrupt to generate wave signals？？

thanks.

Re: imx6ull PWM interrupt

igorpadykov — Tue, 09 Apr 2019 11:19:00 GMT

Hi Alven

for generation wave signals (sound) with pwm one can look on

GitHub - Glowforge/kernel-module-imx-pwm-audio: i.MX6 PWM audio driver

GitHub - sasamy/imx-snd-pwm: A simple sound card based on PWM for i.mx6x processors

Best regards
igor
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topic imx6ull PWM interrupt in i.MX Processors

imx6ull PWM interrupt

Re: imx6ull PWM interrupt