i.MX6 servo control using pwm..

kane · ‎09-19-2014

hello all,

I am trying to control a small <5V servo motor.

I have Linux knowledge but new to PWM.

doing a bit analysis i found there is support for backlight/led control for pwm, is it possible to use this pwm system to drive servo motor ??.

Thanks

Kane

igorpadykov · ‎09-19-2014

Hi kane

I think yes, please look at 8.3 Backlight Control for LCDs

Best regards

igor

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kane · ‎09-22-2014

i am using a marsboard from embest:

i tried by adding the below to board-mx6q_marsboard.c

static struct platform_pwm_backlight_data mx6_marsboard_ldb_backlight_data1 = {

.pwm_id = 1,

.max_brightness = 255,

.dft_brightness = 0,

.pwm_period_ns =20000000, //20ms the default cycle time for a 50 hz motor

}

then

imx6q_add_mxc_pwm_backlight(1, &mx6_marsboard_lcd_backlight_data1);

still no response, however my servo blades move randomly during bootup.

no idea which pwm pulses are driving them.

plz share any example code to control servo using pwm.

i heard the way servo driven by pwm is different from led driven by pwm.

Thanks

Kane

igorpadykov · ‎09-22-2014

Please check

For Mars board specific questions please post to this

board forum.

Best regards

igor