ADC continous mode

ADC continous mode

[shravan]

Hi experts,
i am new to this area,
I am using amstrong 3.8.13 kernel in BBB
at first i loaded the device tree as below,

 echo cape-bone-iio > /sys/devices/bone_capemgr.*/slots

then i used analog pins however i am getting the fixed values that is values 
are not varying continously as i vary input analog voltage

if i go to this path
/sys/devices/ocp.2/44e0d000.tscadc/tiadc/iio:device0

and then ls -al gives me

total 0
drwxr-xr-x 3 root root    0 Jan  1 03:24 .
drwxr-xr-x 4 root root    0 Jan  1 03:24 ..
-r--r--r-- 1 root root 4096 Jan  1 03:27 dev
-rw-r--r-- 1 root root 4096 Jan  1 03:27 in_voltage0_raw
-rw-r--r-- 1 root root 4096 Jan  1 03:27 in_voltage1_raw
-rw-r--r-- 1 root root 4096 Jan  1 03:27 in_voltage2_raw
-rw-r--r-- 1 root root 4096 Jan  1 03:27 in_voltage3_raw
-rw-r--r-- 1 root root 4096 Jan  1 03:27 in_voltage4_raw
-rw-r--r-- 1 root root 4096 Jan  1 03:27 in_voltage5_raw
-rw-r--r-- 1 root root 4096 Jan  1 03:27 in_voltage6_raw
-rw-r--r-- 1 root root 4096 Jan  1 03:27 in_voltage7_raw
-r--r--r-- 1 root root 4096 Jan  1 03:25 name
drwxr-xr-x 2 root root    0 Jan  1 03:27 power
lrwxrwxrwx 1 root root    0 Jan  1 03:27 subsystem -> ../../../../../bus/iio
-rw-r--r-- 1 root root 4096 Jan  1 03:24 uevent

there is no mode directory and buffer directory in list . please help to 
configure ADC In continous mode. 

Thanks 
shravankumar

Re: ADC continous mode

[Richard Weinberger]

On Wed, Jan 22, 2014 at 12:29 PM, shravan <shravanec2011@gmail.com> wrote:
> Hi experts,
> i am new to this area,
> I am using amstrong 3.8.13 kernel in BBB

As the BBB 3.8.x kernel contains gazillions of patches you better
ask the creators of the BSP.

> at first i loaded the device tree as below,
>
>  echo cape-bone-iio > /sys/devices/bone_capemgr.*/slots
>
> then i used analog pins however i am getting the fixed values that is values
> are not varying continously as i vary input analog voltage
>
> if i go to this path
> /sys/devices/ocp.2/44e0d000.tscadc/tiadc/iio:device0
>
> and then ls -al gives me
>
> total 0
> drwxr-xr-x 3 root root    0 Jan  1 03:24 .
> drwxr-xr-x 4 root root    0 Jan  1 03:24 ..
> -r--r--r-- 1 root root 4096 Jan  1 03:27 dev
> -rw-r--r-- 1 root root 4096 Jan  1 03:27 in_voltage0_raw
> -rw-r--r-- 1 root root 4096 Jan  1 03:27 in_voltage1_raw
> -rw-r--r-- 1 root root 4096 Jan  1 03:27 in_voltage2_raw
> -rw-r--r-- 1 root root 4096 Jan  1 03:27 in_voltage3_raw
> -rw-r--r-- 1 root root 4096 Jan  1 03:27 in_voltage4_raw
> -rw-r--r-- 1 root root 4096 Jan  1 03:27 in_voltage5_raw
> -rw-r--r-- 1 root root 4096 Jan  1 03:27 in_voltage6_raw
> -rw-r--r-- 1 root root 4096 Jan  1 03:27 in_voltage7_raw
> -r--r--r-- 1 root root 4096 Jan  1 03:25 name
> drwxr-xr-x 2 root root    0 Jan  1 03:27 power
> lrwxrwxrwx 1 root root    0 Jan  1 03:27 subsystem -> ../../../../../bus/iio
> -rw-r--r-- 1 root root 4096 Jan  1 03:24 uevent
>
> there is no mode directory and buffer directory in list . please help to
> configure ADC In continous mode.
>
> Thanks
> shravankumar
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/



-- 
Thanks,
//richard