Problem with DAC and DMA and CLOCK - STM32H723ZG

[TOsso.1]

Hey

I work with the eval-board Nucleo h743ZI. I implemented sine wave playback using the DAC and DMA, and everything worked very well.
After that, I designed my own board with the same microcontroller and added an external 25 MHz crystal.
I couldn’t get the 25 MHz clock to work.

This is the cofiguration:

I try to debug my code and I saw that I get error at 

SystemClock_Config:
.
.
.

if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)

{

Error_Handler();

}

here:

I switched to using the internal clock of the MCU to work with HSI.
The code runs normally, but I don’t see any signal at the DAC output.
This is the configuration:

Thank you very much

[AScha.3]

Hi,

>I couldn’t get the 25 MHz clock to work.

You set the crystal input to "bypass" - you use really a crystal or an oscillator? (this works not for plain crystal.)

For crystal set it to ...crystal ..resonator.

Maybe - show your circuit, to see more.

+

Cube not complains about this 608 M setting ?

Try lowering all speeds first, just to be sure, its not something with too high clks.

+

btw

On my H743 board i use an oscillator, 16MHz ; never got a problem with the clock.

[TOsso.1]

Hey

The cube not complains about the 608.

I attach what I work with.

and what about work with the internal clock? HSI? why is not work also

  

[AScha.3]

Hi,

so you have a plain crystal -> set in Cube :

+

your cer.caps at the crystal are way to big , for 25M : try 6pF or ... 10pF .

for 25M crystal typ. : 2x 5.6 pF (on nucleo board MB1363 , dnf)

+

What you have now ? H743 or H723 ...?

[TOsso.1]

Hey

H723

I will try.

and you have an idea why is not work with HSI?

[AScha.3]

Hi,

> an idea why is not work with HSI?

No, it should work also. Maybe it will, if you reduce the strange 608M and try at first with reduced clock, lets say : all 50% lower.