S32 Design Studio中的主题 printf() to console

printf() to console

Pete66 — Tue, 23 Mar 2021 15:36:34 GMT

I am maintaining a S32K144 Makefile project in Design Studio.

I want to send UART output to the Debugger console. The only instruction I can find is https://community.nxp.com/t5/Kinetis-Design-Studio-Knowledge/How-to-use-printf-to-print-string-to-Console-and-UART-in-KDS2-0/ta-p/1111033 which uses Processor Expert (which we do not).

Its been a few years (& on STM) but as I recall I just have to add an ITM putc() somewhere?

Please point me at the magic charm(s) needed.

I am using USB Multilink, any special debug configuration needed would be welcome.

Re: printf() to console

jiri_kral — Thu, 25 Mar 2021 08:44:42 GMT

Hi,

there is an old example - https://community.nxp.com/t5/S32-Design-Studio-Knowledge-Base/EXAMPLE-S32k144-UART-printf-scanf-under-FreeRTOS-S32DS/ta-p/1122496

Basically - you need to implement these functions:

int_t __read_console(__file_handle handle, uchar_t * buffer, size_t * count);
int_t __write_console(__file_handle handle, uchar_t * buffer, size_t * count);
int_t __close_console(__file_handle handle);

You can reuse console.h and console.c from example in your project.

Jiri

Re: printf() to console

Pete66 — Thu, 25 Mar 2021 09:06:04 GMT

I am not being clear.

I want printf() to appear in the debugger console. This used to be called ITM?

I have a Multilink connected to the target. I do not have access to UART pins (don't ask!).

I have seen a PE example but we do not use PE (again don't ask!).

Thanks

Re: printf() to console

jiri_kral — Thu, 25 Mar 2021 11:19:36 GMT

Hi,

Ok, I see. I understand it that you need to use printf to serial console, sorry.

So - you can use STD C library with debugger I/O support - for example newlib:

and enable Semihosting console in debug configurations:

You should be able see printf output in Debug session semihosting console.

Hope it helps.

Jiri

Re: printf() to console

tzeng015 — Wed, 09 Mar 2022 02:53:23 GMT

Hi jiri_kral

According these steps , I make the same thing and SOP but it can't work ok.

please see the attach file and kindly help me.

thank you