Unable to get output SWV for debugging on a STM32H723ZGTX

[PadNyammo]

I do not have any output via SWV or via COM port debugging using a STM32H723ZGTX.

I am using a nucleo ST-link breakoff board to program with no issue.

I have tried solutions provided in both following threads:

https://community.st.com/t5/other-tools-mcus/no-traceswo-output-on-stm32h7xx/m-p/395490

https://community.st.com/t5/stm32-mcus/how-to-redirect-the-printf-function-to-a-uart-for-debug-messages/ta-p/49865

Any suggestions would be much appreciated.

 

 

 

[STTwo-32]

Hello @PadNyammo and welcome to the ST Community :smiling_face_with_smiling_eyes:.

I suggest you to take a look at this post. It may solve your issue.

Best Regards.

STTwo-32 

[PadNyammo]

As suggested in the linked thread, I increased the buffer size to 20,000,000 with no luck. I have also ensured that my ST-Link programmer is up to date, version V2J43M28.

I am able to get an output on the live expressions in the CubeIDE, but no output on any SWV window(ITM data Console, data logger etc.) I have followed this official guide https://www.youtube.com/watch?v=-X8tndfqTu8 .

SWV is enabled in debug configuration and set to the HSI core clock. Under ITM Stimulus Ports port 0 is also checked, and I have started the trace (red button).

Any help would be greatly appreciated, I have been stuck on this for quite some time.

 

[PadNyammo]

Bump?

[AScha.3]

Bump??

Just - you have connected : swd, swc, swo , gnd  ( + vcc is 3v3 ) ?

IF this connected, set in Cube/.ioc the ->

THEN can get swv working - but little bit of game : (it will not work on first try ! )

Rules : start debug, pause it, open swv window, check port0 is set, -> ok , then click red button, run, stop debug.

Then do same again...if not working : same again ... it should work now.

IF it works, it will work in your next debug sessions also, you need to do nothing then - it just works (no button/start etc.) . 

btw

How you "see" it working ? printf(xx) ? 

you need to put (at end of main.c ) :

 

 

int __io_putchar(int ch)
{
 ITM_SendChar(ch);
 return (ch);
}

/* USER CODE END 4 */

 

 

and in while loop some printf ...but not too much ! (serial buffer will overflow! ) (+ without \n it wont work)

 

 

	 printf("test swv \r\n");
	 HAL_Delay(1000);
 /* USER CODE END WHILE */

 

 

 

 

[PadNyammo]

SWDIO,SWCLK,SWO,!RST,GND and VCC at 3.3V is connected. I am able to program the board without issue and can read live expressions within the IDE.

Under SYS Mode and configuration I do not have "trace asynchronous Sw" avaliable to choose from, however under Trace and Debug -> Debug "trace asynchronous Sw" has already been selected.

 

int __io_putchar(int ch)

function also does not work, there is no output.

I have also attempted using the following, which was suggested in an official ST video https://www.youtube.com/watch?v=-X8tndfqTu8 :

ITM_Port32(31) = 1;
ITM_Port32(31) = 2;

int _write(int file, char *ptr, int len){
 int DataIdx;
 for(DataIdx=0; DataIdx<len; DataIdx++)
 {
 ITM_SendChar(*ptr++);
 }
 return len;
}

I am trying to print the following, and do no think this is enough for the serial buffer to overflow.

printf("Hello World\n\r");
HAL_Delay(1000);

 

[PadNyammo]

I will continue to try your game method, but does anybody else have any suggestions on what I could try?

[PadNyammo]

This issue has now been resolved, it was a poor solder connection between the SWO pin and the PCB. 

This was a simple mistake that I should have caught early on.

Thanks AScha.3 for helping out.