ST-LINKV2 + 20-10 pin, STM32F4 ''target not connected''

alexanders.farley9 · ‎2012-12-12

Posted on December 12, 2012 at 22:34

I'm trying to program an STM32F415VG on a new board design. The board has power (3.3V) and the connectivity appears to be correct from the 10-pin Cortex Debug header to the chip although I'm doublechecking right now. The BOOT0 pin is pulled high on the board.

Both IAR Embedded Workbench and ST-LINK utilities say no target connected.

Are there any simple checks I can do? The chip shouldn't need anything other than power, correct SWD connectivity and BOOT0 high right? *Edit* just tested with BOOT0 pulled low, same result.

Tesla DeLorean · ‎2012-12-12

Posted on December 12, 2012 at 23:03

With BOOT0 High you can ping USART1 or USART3 for signs-of-life

Send 0x7F at 9600 8E1, and see if you get an 0x79 response.

Generally check the Analogue and Digital supplies, NRESET/NRST level.

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alexanders.farley9 · ‎2012-12-13

Posted on December 13, 2012 at 17:11

Turns out the header pinout was wrong... the 10-pin footprint used ''IC'' style numbering (counterclockwise) instead of raster. Thanks for the help.