STM32F4 not recognized by computer

[modius13]

Hey all,

I finally got a Discovery board and managed to get the MIOS bootloader installed on it, but when I flipped the board around after connecting PA9 to the 5V pin, nothing. The computer won't even recognize that anything is plugged in. Is there anything I can do to fix this?

I'm running Windows 7 64 if that makes any difference.

[FantomXR]

Yes. You need to update the firmware of the STM. More informations you can get on ucapps on the STM core site. 

[modius13]

I have updated the firmware to the latest on the STM website, still nothing. The board powers on and the LEDs blink in a manner suggesting that the bootloader is active, but the computer acts like nothing is connected to it. I am connecting via the CN1 USB connector.

[latigid on]

CN1 is the miniUSB and is used to flash the bootloader via ST-LINK. It also supplies power to the target.

CN5 is the microUSB for uploading MIOS apps. Its "Vbus" is not connected to the +5V required to supply the MCU, so you need a jumper cable or a Core PCB. 

The issue with the older firmware is an absence of a USB connection in CN1 would hold the main MCU in reset. This was rectified in the later firmware update for ST-LINK v2.

[modius13]

After some googling and such, I'm almost 95% sure that the problem is that I might be using a "power only" USB cable.... because I'm an ID-10-T.... >.<

 

Edit: Yup, that was it... We're all good here. How are you?

Edited April 13, 2017 by modius13

[jaytee]

On 4/13/2017 at 10:10 AM, modius13 said:

We're all good here. How are you?

We're sending a squad up.