STM32F401C - VARIOUS PC DON'T ''SEE'' MY CARD

[giorgiob11]

Posted on February 05, 2015 at 12:26

HELLO. My Name's Giorgio and i have a problem with this card. When i connect the card ,my pc doesn't detect the card. The card turns off 3 lights by USB link: 1- Com ,2-PWR 3-LD4 .Trough my Operating system and others i can't work on my card . Is it possible that the card has in its memory aan old program? Before it has programmed by my friend and i think that in my card's memory is yet a program and it can't onterface with the pc. Isthere a method to reset the card via elettrically mode beacuse via pc it isn't possible

[AvaTar]

Posted on February 05, 2015 at 17:03

When i connect the card ,my pc doesn't detect the card.

I guess it does - check in the device manager (or lsusb on *nix). It just can't deal with it. You need to install the ST-Link driver from the ST website. Try this (WinXP .. Win7): 

http://www.st.com/web/en/catalog/tools/PF258167

[Tesla DeLorean]

Posted on February 05, 2015 at 18:17

Although poorly stated, I will assume you have a DISCO or NUCELO board.

If you want to stop it running user code, you'd strap the BOOT(0) pin to VDD (3V). This will not reset/erase the part, but would permit you to use ST-LINK Utilities to erase and load different firmware. The ST-LINK functionality would be dependent on you loading drivers, and if Windows 8.x, that those drivers are signed.