adc driver on i.mx28

[mehmet]

Hi,

I need to read adc value of lradc channel 0. Is there any sample code? Or how can I do it?

Thanks

Mehmet

[mehmet]

I have i.mx28 evk and use linux. 

I checked keyboard driver,

I used below functions for init;

hw_lradc_init_ladder(LRADC_CH1, LRADC_DELAY_TRIGGER_BUTTON, 200);   hw_lradc_set_delay_trigger_kick(LRADC_DELAY_TRIGGER_BUTTON, !0);

But I couldn't understand how can I read adc value. In keyboard driver there 2 functions,

raw_button = __raw_readl(devdata->base + HW_LRADC_CHn(devdata->chan)) & BM_LRADC_CHn_VALUE;

 vddio = hw_lradc_vddio();

Which one of them should I use?

Thanks.

Mehmet.

[daiane_angolini]

I know there is some ADC code into unit_test. You can take a look if it is enough for you.

[AhmetYUCE]

"resistor divider" , sorry for mistype

[AhmetYUCE]

Check out mxs keyboard driver in iMX28 BSP. It uses a resistor driver as button(s).

[daiane_angolini]

Please, tell us which is your board, and which is your OS