Post Go back to editing

ad7991 with odc - Unable to create buffer


I am using the ad7991 adc with the Raspberry Pi2.

Reading single values from the \iio:device0\in_voltage0_raw works fine, but when trying to stream the data with osc, I am getting errors "Error while reading data: Resource temporarily unavailable". My host pc is lubuntu 14.04.

from the output of iio_info I see it cannot read some of the the attributes (add_trigger, raw, etc), even running with sudo.

I have connected the iio-trig-sysfs by "echo sysfstrig1 > current_trigger". Maybe this is not the right trigger to use... but thought using it for testing purposes only.

loading the hrtimer trigger by "sudo modprobe iio-trig-hrtimer" didnt actually created the trigger as i hoped it do.. for this i tried adding the following code in my bcm2709.c board file (found on this forum):

static const char *hrtimer_trigger_pdata[] = {  
     "0", /* 0 is the name of the trigger */  
static struct platform_device hrtimer_trigger = {  
     .name = "iio_hrtimer_trigger",  
     .dev = {  
          .platform_data = &hrtimer_trigger_pdata,  

and registering the device with:


still didnt show up the hrtimer0 iio device..

can somebody point me in the right direction what causes this problem and why the hrtimer trigger dont show up?

Parents Reply Children
No Data