ST-Link and STM CDC/VCP drivers interference?

Posted on May 17, 2011 at 14:21

I believe the VID/PID of ST-LINK doesn't overlap to those of the ST CDC example (STM32_USB-FS-Device_Lib_um0424 V3.2.1), though I don't have ST-LINK, yet.

 

 

ST CDC example  VID/PID = 0x0483 / 0x5740

 

ST-LINK         VID/PID = 0x0483 / 0x3744 (found on web)

 

Yes, such interference would be strange.

Is your board enumerated without ST-LINK connection, after ST-LINK burns its firmware?

Yes, but I had once to reboot PC as my board connection seemed to be blocked further after previous ST-Link connection.

If it runs without ST-LINK, the problem lies in the setting of ST-LINK.

Thank you for advise.

- On the board, connect JTAG reset pin to MCU reset

 

- Enable ''Use Reset at Startup'' option

 

- Disable ''Run to main()'' option

 

 

O.K., I can try this settings.

However, I have DFU bootloader from 0x08000000 and the application from 0x08003000. Of course, the bootloader normally skips to 0x08003000 but perhaps it  will not work with your settings?

Ivan

Posted on May 17, 2011 at 14:21

I believe the VID/PID of ST-LINK doesn't overlap to those of the ST CDC example (STM32_USB-FS-Device_Lib_um0424 V3.2.1), though I don't have ST-LINK, yet.

ST CDC example  VID/PID = 0x0483 / 0x5740

ST-LINK         VID/PID = 0x0483 / 0x3744 (found on web)

Is your board enumerated without ST-LINK connection, after ST-LINK burns its firmware?

If it runs without ST-LINK, the problem lies in the setting of ST-LINK.

For ULINK2 and KEIL uVision, I've met similar problem (don't enumerate on debug) without these settings.

- On the board, connect JTAG reset pin to MCU reset

- Enable ''Use Reset at Startup'' option

- Disable ''Run to main()'' option

ST-LINK and EWARM pair should have similar setting, too.

Tsuneo

Posted on May 17, 2011 at 14:21

- On the board, connect JTAG reset pin to MCU reset

Yes.

- Enable ''Use Reset at Startup'' option

 

There is no options for ST-Link in EWARM 6.1 except JTAG/SWD switching.

 

- Disable ''Run to main()'' option

 

Yes.

 

Ivan