Can't connect STM32F4 via USB to PC

[Andrey Semenov]

Posted on July 25, 2016 at 09:19

to be migrated, sourceId: 68358:697285D7-A9CA-445D-B16C-F23BF0E3B1A3

[slimen]

Posted on July 26, 2016 at 13:20

Hello,

This error it can be related to the HS max packet size. So you can :

1) Increase the heap and the stack size. 

2) If you use the embedded phy of the HS port, change the buffers size and HS max packet size from 512 to 64.  

Regards

[Andrey Semenov]

Posted on July 26, 2016 at 15:48

Ok, where can I find these stack and buffer sizes? My MC doesn't have firmware. I have no .c files. Or these actions I should do in Windows?

[Tesla DeLorean]

Posted on July 26, 2016 at 18:27

Use JTAG/SWD and get software on the chip to validate your design. Of specific interest is that the HSE starts, how long it takes to start, and the frequency (output via MCO) is solid.

[Andrey Semenov]

Posted on July 27, 2016 at 19:17

What software? My MC is empty, there isn't any firmware in it.

Or I should write it to start MC in DFU mode?

[Tesla DeLorean]

Posted on July 27, 2016 at 21:46

You writes software, you JTAG it.

You validate your design from the inside out.