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USB does not work on STM32F437VGT

Question asked by adib on Jun 8, 2015
Latest reply on Jun 9, 2015 by adib

I made a new board using STM32F437 having USB FS connection.
My samples I evaluated on IAR STM32F429II board and USB FS.
The code generated by CubeMX runs out of the box with minor adjustments of stacksize.
The 429 board conencts to Win7 but there is not a glimpse using the 437 board. :-(

The only difference is the crystal STM32F437@16MHz vs STM32F429@8MHz.
This can be adjusted easily by RCC_OscInitStruct.PLL.PLLM parameter.

I also checked the errata. It states that it should work if dual bank feature is disabled.
It is.

I have no glue whats going on. Any hints?

Regards, Adib.