STM32 Value Line Discovery Board in Keil: ''Unknown Target Connected''

[smithderek2000]

Posted on August 14, 2014 at 02:31

Hello,

   I'm testing the STM32F100 processor with STMicro L6474 motor driver for a new product. I'm testing with the STM32 Value Line Discovery board. I downloaded and installed Keil uVision, most recent release (5.11). I also downloaded and installed the legacy tools too.    I downloaded the L6474 software example for the STM32 Value Line Discovery Board. I can open them in uVision, and build the example. But when I attempt to download to the board, I get an error ''Unknown Target Connected''. In Options : Debug I selected ''ST-Link Debugger'' to use. And in Flash Download I selected STM32F10x Med-density Flash''. I have verified that the USB device is showing up in Device Manager. How do I get this to work? This is holding up development.

[Tesla DeLorean]

Posted on August 14, 2014 at 03:58

The VL-Discovery probably should be ''ST-Link (Deprecated)'' if that's available as an option, as it's an ST-LINK V1 device.

Make sure you use SWD mode, and not JTAG, and make sure it is recognized in the dialog pane.

[smithderek2000]

Posted on August 14, 2014 at 23:36

There was no option for ''ST-Link (Deprecated)'' but switching to SWD mode worked and I am now able to download code to the device.

Thanks