Terminal dropping messages

[Raluca]

Good afternoon, 

I am trying to send some analog data from a function generator to my nRF7002 DK and visualize the output in Putty. I use printk to print the values and I see that I have a lot of messages being dropped (I constantly get  --- 17 messages dropped --- for some applications and a lot more for others). Can you please help me increase the size of the print buffer? Or there might be another problem?

Thank you. 

[Håkon Alseth]

Hi,

 

In your prj.conf, you can increase the log buffer size via this configuration:

CONFIG_LOG_BUFFER_SIZE=8192

 

Kind regards,

Håkon

[Raluca]

Thank you so much for replying!

I tried changing with that buffer size for testing the SAADC for just calculating the internal voltage and I still got --- 7744 messages dropped ---

[Håkon Alseth]

That means that you're blocking the logger thread from running somewhere in your application.

Increasing the logger size then will not do much, as there's a function effectively blocking the rest of your application from running.

 

Try yielding/sleeping, and avoid tight while(1) / for(;;) loops without sleep calls.

 

Kind regards,

Håkon

[Raluca]

Hey! 

            int16_t current_value;

            for(int i=0; i < p_event->data.done.size; i++){

                current_value = ((int16_t *)(p_event->data.done.p_buffer))[i];

            printk("%d, ", current_value);

           

            }

I am using this function to print my values. I tried adding a K_SLEEP in the for loop and outside, but I still get only 10% of my values. Which is the best way to print big arrays?

Thank you!

Kind regards, 

Raluca

[Håkon Alseth]

Hi,

 

Raluca said:

I tried adding a K_SLEEP in the for loop and outside,

How large is the array that you're printing? and what was the k_sleep that you tried? k_msleep(1) should be sufficient per half-word.

 

Kind regards,

Håkon

[Raluca]

My SAADC buffer is 8000. I tried 50 us, 50ms 

[Håkon Alseth]

Can you share your sample code? Or atleast from which function(s) you are printing from? It sounds like you are in interrupt priority and printing.

 

Kind regards,

Håkon