Power quality event can't be detected when process_data = 0

Hi YongLawrence, if you want to have events and waveform at the same time, I recommend using one of the versions that implement the waveform reading based on interrupts, since in the implementation on main the status is polled. The process data was added to stop the library computing while the waveform is read and transmitted, since the library is blocking, hence the waveform data will have discontinuities. If you use the interrupt version for waveform reading you can make it work in the same time. I recommend using the interrupt only for the waveform and the other readings can still happen by pooling the STATUS0 register (like the implementation on main).  You can look here for an example and adapt it: projects: eval-pqmon: Waveform streaming · analogdevicesinc/no-OS@498d01f  - this is just an example since it is not on main.

Hi REtz ,

I'm using analogdevicesinc/no-OS at 498d01fe981cd7f71929336123a8813070790827 to build hex file. Then i run simplest coding below at Windows.

Whatever value of process data = 1 or 0, buffer can't be created, power quality events also fail to be detected.

#include <stdio.h>

#include <stdlib.h>

#include <iio.h>


int main() {

    // Configuration
    struct iio_context* ctx = iio_create_context_from_uri("serial:COM4,921600,8n1");
    const struct iio_device* dev = iio_context_get_device(ctx, 0);
    struct iio_channel* chn = iio_device_get_channel(dev, 10);
    const char* chnName = iio_channel_get_name(chn);
    printf("Channel[10] name: %s \n", chnName);


    // Process Data
    double process_data = 9.0;
    //iio_device_attr_write_double(dev, "process_data", 0.0);
    iio_device_attr_read_double(dev, "process_data", &process_data);
    printf("Process data: %lf \n", process_data);

    //Buffer
    struct iio_buffer* buffer = iio_device_create_buffer(dev, 256, false);

    if (!buffer) {
        fprintf(stderr, "Error: Failed to create buffer\n");

    }

    // Read countEvent
    double chnAttrValue = 0.0;

    while (true)
    {
        iio_channel_attr_read_double(chn, "countEvent", &chnAttrValue);

        if (chnAttrValue != 0.0)
        {
            printf("countEvent: %lf \n", chnAttrValue);

            break;
        }
    }




    iio_context_destroy(ctx);

}