[Gnuk-users] Success with SWD via TUMPAv1

[Peter Lebbing]

On 06/04/17 17:15, Paul Fertser wrote:
> And BTW, TUMPAv2 supports SWD with exactly the same resistor
> hack, so there's not too much sense in buying it if you already have
> TUMPAv1.

I have succesfully programmed GnuK 1.2.4 into the FST-01 using my
TUMPAv1. I put the 470R resistor on pins 1 and 4 of the SPI1 header so I
could easily hook up wires to the JTAG header, and this worked
perfectly. That way you don't have to connect both a resistor and a wire
to a single pin of the JTAG header, and you can just use DuPont header
connectors without issues.

OpenOCD from Debian jessie-backports was recent enough for SWD. The
following command line Just Works(TM):

$ openocd -f interface/ftdi/tumpa.cfg -f
interface/ftdi/swd-resistor-hack.cfg -f target/stm32f1x.cfg

Thanks everyone,

Peter.

-- 
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