I am having difficulty in getting a working clock configuration for an STM32H753 chip.

[stan_av]

the STM32H753 chip is mounted on a board with an external 12Mhz HSE crystal and 32k LSE crystal. Using the CUBE config tool I have the attached SystemClock_Config function.

The function gets stuck waiting for a valid RCC_FLAG_PLLRDY signal in line 42 (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK).

Any ideas about what the issue might be?

Thanks in advance ..

P.S. It works if I adjust the values to use the internal oscillators

[flyer31]

You could try my slim "my_system_stm32H7.c" clock config function, which I just posted in my "Cache New" Nut blog ... . This should work nicely, but of course only for the HSE Xtal part ... the 32k LSE crystal part you have to solve yourself, sorry... .

[stan_av]

where is your blog hosted?

[flyer31]

Here: https://community.st.com/s/question/0D50X0000A1nRi4SQE/nasty-little-cache-new-nut-from-the-lightning-fast-stm32h7

[Tesla DeLorean]

Zero out the content of the structures.

Enable HSE and output via MCO pin (PA8) and establish if it is oscillating properly and at the frequency/stability expected.

Make sure the HSE_VALUE in stm32h7xx_hal_conf.h reflects your design.

Not everything is a software problem.