I am working on a external USB HS PHY (USB3300) on STM32F405. The board is my own PCB with no HSE installed. I modified
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// in mcuconf.h
#define STM32_USB_USE_OTG1 FALSE
#define STM32_USB_USE_OTG2 TRUE
// in board.h
#define BOARD_OTG2_USES_ULPI
I also configured the GPIO pinset, making the pins related to HS ULPI to alternate mode (is it alternate 12?). But it's not work. Nothing shown on dmesg on the PC. I think there may be problems in my GPIO or clock configuration.
So I am wondering how could I do to make the ULPI PHY work, any documents here?
Regards,
Jun ASAKA.