I don't understand how to use the function printf in S32 Design Studio for ARM Version 2.2

[p_decesare]

Hi,

I have some problems with the function Printf. I include the library <stdio.h> in my file main.c. The idea of my code is to turn on and off a green led. When I debug my code, I want to see on comsole the word: Green.

Here my code:

#include "S32K144.h" /* include peripheral declarations S32K144 */
#include <stdio.h>

int main(void)
{
PCC->PCCn[PCC_PORTD_INDEX] = 0x40000000;
PORTD->PCR[15] = 0x00000100;
PTD->PDDR = 0x00008000; /*output*/

for(;;) {
PTD->PDOR = 0;
PTD->PDOR = 0x00008000;
printf("Green");
}

return 0;
}

Excuse me for the trivial question, but I'm a begginer with the embedded system.

I hope that someone could help me.

Thanks for your availability

[tzeng015]

hi jiri_kral
I have the same problem and the printf function is also can't work well.

Please see the attach file .

thank you

tzeng015 

[Mehul_Patel_NXP]

Hi, @tzeng015 , 

Sorry, checking here. If the issue was resolved. 

Thank you. Best regards. 

- Mehul Patel 

[peter_thompson]

I'm also trying to get printf to work, but it isn't working.

Using S32K148EVB, connected via USB to laptop with Win10 with S32 design studio (just updated to latest). 

The code:

int main(void)
{
PCC->PCCn[PCC_PORTD_INDEX] = 0x40000000;
PORTD->PCR[15] = 0x00000100;
PTD->PDDR = 0x00008000; /*output*/

for(;;) {
PTD->PDOR = 0;
PTD->PDOR = 0x00008000;
printf("Green\n");
}

return 0;

}

Using the library Ewl_C Debugger Console. 

In theory, this should be printing "Green" continuously on the debug console, but I'm not seeing anything.

[jiri_kral]

Hi, 

the printf output is shown in semihosting console: 

If console is not visible for some reason - you can open it in console menu: 

Hope it helps. 

Jiri 

[peter_thompson]

Odd. I just created new example, set the library to ewl_c debugger, added include <stdio.h> and the printf worked.

So, I think I’m good for now. Thanks for your help.

Cheers, Peter

[peter_thompson]

Hi Jiri,

I am not seeing the text “Green” on the debugger console, nor the regular console. I have tried also to use Teraterm to listen for the text, but I am not seeing anything. I have the ewl_c Debugger Console set for Libraries support.

I downloaded and ran the LPUART project – this communicates fine with Teraterm.

Anything else I should check?

Cheers, Peter

[jiri_kral]

Hi, 

you need to use lib C with Debugger console: 

printf output is shown in Semihosting console.

Hope it helps. 

Jiri 

[tzeng015]

Hi 

ewl_C Debugger Console ??
I can’t see it .

[psarkar]

Were you able to resolve the issue? I am facing the same issue and am unable to see 'ewl_c debugger' as in the snapshot shared here.

[p_decesare]

Hi Jiri Kral

thank you for your answer. I don't resolve the problem.

Here two figures. 

I follow your advice, in fact I set the option of Libraries Support. But at the Console I don't see the word Red.
Can help me?

Thank you for your availability.

[jiri_kral]

Hi, 

sprintf is for printing into string (memory). Try to use printf instead. 

Jiri