USB problems

[Dani Prieto]

Posted on January 05, 2017 at 13:59

Hello,

I use a TUSB2046BVF to connect a host (tablet) to 2 USB connectors and 2 micros, one is STM32F103 and the otherSTM32F107, and I can only operate the 103 when I remove the pull-up resistor at 107.

The other ports do not work, nor the 107 when I remove the pull-up to 103.

I'm stuck with this problem.

Thanks in advance.

#stm32f103-

[Imen.D]

Posted on January 05, 2017 at 17:07

Dear

Prieto_Castillo.Dani

‌,

Have a look to the

http://www.st.com/content/ccc/resource/technical/document/application_note/b9/9b/16/3a/12/1e/40/0c/CD001675pdf/files/CD001675pdf/jcr:content/translations/en.CD001675pdf

and

http://www.st.com/content/ccc/resource/technical/document/errata_sheet/8d/85/aa/39/f4/58/40/e8/CD00238pdf/files/CD00238pdf/jcr:content/translations/en.CD00238pdf

to check known limitationwith STM32F107 configuration which could be your problem if you have the same conditions.

Maybe this note can help you:

'For STM32F107xx line devices, PA9 pin (USB_VBUS) is used to detect the USB host connection. The initialization of USB peripheral is performed only if PA9 is high at detection phase which means that a host is connected to the port and delivering 5 V on the USB bus. When PA9 level is high at detection phase, more time is required to initialize and shutdown the USB peripheral.

'

Refer to t

he STM32F107xx

http://www.st.com/content/ccc/resource/technical/document/datasheet/e4/f3/1a/89/5a/02/46/ae/CD00220pdf/files/CD00220pdf/jcr:content/translations/en.CD00220pdf

and

AN2606 to make sure that you've configured the right pins in the right mode.

Please, keep us informed about your progress on this issue.

Best Regards

Imen

[Dani Prieto]

Posted on January 09, 2017 at 09:10

Thank you

DAHMEN.IMEN

for your answer.

I do not use the PA9 as VBUS on the USB, should I use it? I used CubeMX and it gave me the option of not using it.

The tablet gives me an error with this device: 'Device Descriptor Request Failed', while detects the STM32F103 as 'STMicroelectronics Virtual COM Port', as they are configured.

Thanks you for your help

Daniel Prieto

[Imen.D]

Posted on January 09, 2017 at 23:36

Hello

Prieto_Castillo.Dani

‌,

C

heck if you have switched D+ and D-.

So, t

ry to connect these component:

D- =PA11 and

D+ =PA

Hope this

https://community.st.com/0D50X00009XkeKwSAJ

helps you.

Please keep me informed about your progress.

Best Regards

Imen