nrfx_spim_spis sample cannot be used UART to print

RE: nrfx_spim_spis sample cannot be used UART to print

Hung Bui — Fri, 23 Aug 2024 08:26:41 GMT

Hi,
I'm not aware that the blinky has any code to print anything on UART.

As I mentioned if you do CONFIG_LOG_PROCESS_THREAD=y, you need to do LOG_PROCESS() frequently (usually in the idle thread)
If you want to see the banner *** Booting Zephyr OS build fcaa60a99fa9 *** then you need to set CONFIG_BOOT_BANNER=y

RE: nrfx_spim_spis sample cannot be used UART to print

TGuanLa — Fri, 23 Aug 2024 02:29:20 GMT

Hi,

Thanks for your reply！

When I set CONFIG_LOG_PROCESS_THREAD=y, the printk could print out on UART.

I still have a question why other samples can print on UART without CONFIG_LOG_PROCESS_THREAD=y, such as blinky.

I have tried to keep their config files such as prj.conf and .overlay consistent.

RE: nrfx_spim_spis sample cannot be used UART to print

Hung Bui — Thu, 22 Aug 2024 12:29:14 GMT

Hi,
I found that you can either remove

CONFIG_LOG=y

CONFIG_LOG_PROCESS_THREAD=n

Or if you set CONFIG_LOG_PROCESS_THREAD=y then you can print out on UART with printk.

The reason is that if you don't do CONFIG_LOG_PROCESS_THREAD=y, you would need to do LOG_PROCESS() to print out on UART.

RE: nrfx_spim_spis sample cannot be used UART to print

TGuanLa — Thu, 22 Aug 2024 07:39:39 GMT

Hi,

Maybe my description is not accurate.

The sample project uses log to print information while I just want to use printk.

However, there is nothing print when I use printk.

It seems uart0 disabled.

I have already checked the output zephyr.dts. Status of uart0 is "okay".

There is nothing print in RTT Viewer. And in debug mode the code works as usual.

Besides, other samples will firstly print "*** Booting Zephyr OS build fcaa60a99fa9 ***" after booting while my SPIS project prints nothing.

I wonder why the uart0 is not working properly.

Thanks!

RE: nrfx_spim_spis sample cannot be used UART to print

Hung Bui — Wed, 21 Aug 2024 12:06:03 GMT

Hi,
Please check if the program assert ? Please try to debug, we can't help if you simply say " it doesn't work".
Try printing the log using RTT.