My PC with windows does not detecting STM32MP157 in DFU mode

[ebilal83]

Hi everyone,

I've designed a custom board using the STM32MP157. Rather than using an ST-Link, I'm planning to flash the code using DFU mode. To do this, I've installed STM32CubeProgrammer on my PC and connected the USB cable to the board. However, CubeProgrammer isn't detecting the STM32MP157, even though I've configured the BOOT pins for DFU mode.

I'm wondering if I'm missing something. Can anyone guide on this issue?

[Tesla DeLorean]

Does it work on an EVAL/DK1 board?

Does Windows recognize anything being attached?

Check viability of the USB Device implementation on your board, and any clocks the STM32MP157 needs for USB functionality.

[ebilal83]

Thank you for your reply. I haven't used the EVAL/DK1 board. Instead, I've designed my custom board based on the standard schematic provided by STMicroelectronics for the EVAL board, making modifications as needed.

Here are the specific connections:

Micro USB                                          Connector STM32MP157 Pin

USB_N	P11 (Y16)
USB_P	P12 (W16)
USB_detect	OTG_VBUS

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The USB_detect signal is a 4V signal derived from VBUS, which becomes active when a USB cable is connected. USBFS and USBHS pins receive 3.3V signals.

The board utilizes a 32.768 kHz basic oscillator connected to P2 and P1. Additionally, a 24 MHz oscillator is connected to T2 and T1 pins. Should this 24 MHz oscillator be enabled for USB-based coding in DFU mode?

I'm encountering some difficulties and would appreciate your guidance.

 

[PatrickF]

Hi,

DFU is not working on OTG_FS pins, you should use OTG_HS ones.

 

Regards.

[ebilal83]

I have activated both FS and HS pins by connecting it with 3.3V. The High Oscillator also working,  HSEIN and HSEOUT is 25Mhz. I checked it on an oscilloscope.