STM32F746G-DISCO, CN14 power question

baev_al · ‎2016-01-12

Posted on January 12, 2016 at 16:22

Hello.

According to UM1907 I can power the board via ST-LINK USB connector (CN14) if the host PC can deliver 500mA. My board doesn't start using CN14 connector. When I power it from the same USB via usb_fs (CN13) or usb_hs (CN12) the board starts.

Jumper on JP1 connector is installed correctrly according to the power supply choice.

Is it ok?

One more thing. When I connect the board via ST-Link USB connector, STM32 STLink device appeared but ''the drivers are not installed'', while connecting STM32F4discovery to the same connector works fine.

Is ST-Link broken?

Amel NASRI · ‎2016-01-13

Posted on January 13, 2016 at 16:40

Hi baev.alexander,

Try to use the STLink Utility tool. If device is still not recognized, you have to perform a firmware upgrade in order to install suitable firmware for STM32F7.

-Mayla-

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baev_al · ‎2016-01-13

Posted on January 13, 2016 at 18:28

Hi Mayla

I tried STLink Utility tool. It said that it could not find any device. ''You have to perform a firmware upgrade in order to install suitable firmware for STM32F7''. How should I do this?

Tesla DeLorean · ‎2016-01-13

Posted on January 13, 2016 at 20:28

I think it uses the mbed ST-LINK V2.1 drivers and firmware. The currently ST-LINK Utilities (v3.8 as I recall) have the latest firmwares (V25).

If the firmware on the STM32F7 interferes with things either keep the Reset button pressed or strap BOOT0 high.

http://www.st.com/web/en/catalog/tools/PF260219

http://www.st.com/web/en/catalog/tools/PF258168

http://www.st.com/web/en/catalog/tools/PF260217

https://developer.mbed.org/teams/ST/wiki/ST-Link-Driver

https://developer.mbed.org/teams/ST/wiki/Nucleo-Firmware

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baev_al · ‎2016-01-18

Posted on January 18, 2016 at 13:24

Still didn't solve the problem. I changed the board - the same results. I installed the drivers on Windows XP PC - the kit works fine. I changed the FW of the ST-Link (STSW-Link007) to the latest. I removed all the ST drivers from the Windows7 PC, reinstalled the latest ones (STSW-Link009). Nothing changed. When I connect the discovery board to the usb, systems says that drivers are not installed correctly (with specific wrong drivers' sound). Have someone tested the board with Windows7 32bit?

baev_al · ‎2016-01-19

Posted on January 19, 2016 at 20:20

Maybe it will help someone. In my case the solution was the following. I just renewed ST Link drivers but chose them from already installed drivers (I don't know how to explain precisely because I have russian windows interface). So reinstalling the drivers from the devices manager had no effect, but choosing from the existing solved the problem.