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Can't get printf() from J-Link

Danny Miller

I have a j-link and basic "hello world" Keil project on an STM32F407 board. It's in SWD.

The J-Link programs just fine, and can halt on Breakpoints and reads back register values.

However, I can't get anything from a printf(), and I tried to do what is listed as necessary, and played with things for quite awhile. Investigating, it hangs at:
while (ITM->PORT[0].u32 == 0);

It hangs here on the first character.

I have startup_stm32f4xx.s, and made an STM32DBG.ini file which was specified under Configure Flash Tools -> Debug.
ITM Port 0 is Enabled and Privilege 0.
Have the "#define ITM_Port8(n) ...." stuff, and fputc just uses ITM_SendChar(ch);

Been at this awhile now, any ideas?

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