Using USB OTG HS with internal FS PHY on STM32F446RET6

[peppapighs]

Hi,

I am currently working on a simple DFU bootloader on my STM32F446RET6 PCB. I have my USB port connected to the USB OTG HS pins and I plan to use the internal full speed PHY as described in datasheet. Here is my configuration:

I have added to following definitions in the tusb_config.h:

#define CFG_TUSB_MCU OPT_MCU_STM32F4

#define BOARD_DEVICE_RHPORT_SPEED OPT_MODE_FULL_SPEED

#define BOARD_DEVICE_RHPORT_NUM 1
#define CFG_TUSB_RHPORT1_MODE (OPT_MODE_DEVICE | OPT_MODE_FULL_SPEED)
#define BOARD_TUD_RHPORT 1

However, when I flash and run the firmware, the following assertion always fails:

tinyusb/src/portable/synopsys/dwc2/dcd_dwc2.c

Line 647 in 038be21

TU_ASSERT(gsnpsid == DWC2_OTG_ID || gsnpsid == DWC2_FS_IOT_ID || gsnpsid == DWC2_HS_IOT_ID);

This does not happen when I am using my development board with the USB port connected to USB OTG FS. Any idea what the problem is here?

Thank you.

[HiFiPhile]

Hi, what's the value of gsnpsid ? If it's 0 then maybe OTG_HS's clock is not enabled.

[peppapighs]

Hi, it seems that gsnpsid is 0 as you suggested. Investigating the debugger, I found out at the rhport is 0 so it turns out that running tusb_init() without supplying any arguments will default to RH port 0 so I have to call tusb_init(1, NULL) instead. The issue should be fixed now. Thank you very much!