<Dracos-Carazza>
Hi, I would like to update my JTAG gear somewhere in the future. Currently I'm using an old Amontec JTAG Key tiny from 2006 and some old ST-Links from STM32F4 Discovery boards. Especially the JTAG Key Tiny is the component I would like to update
<Dracos-Carazza>
It's pretty slow
<Dracos-Carazza>
Are there any recommendations for something up to 100€?
<Dracos-Carazza>
Target CPUs are Cortex A/M(/R)
<PaulFertser>
Dracos-Carazza: hey. You should be aware new stlinks (v3) have firmware restriction that makes them useless with non-ST targets.
<Dracos-Carazza>
Yeah, the ST-Link stuff I use, is only for ST targets. I still have the only St-Link and they work fine for most of my ST targets
<PaulFertser>
Dracos-Carazza: hm, you say amontec adapter is slow for you, how come, what chip is it using?
<Dracos-Carazza>
As I said, I'm primarily looking for something to replace the old Amontec
<PaulFertser>
The old FT2232D?
<Dracos-Carazza>
FT2232D
<Dracos-Carazza>
yes
<PaulFertser>
Dracos-Carazza: I'd say the cheapest more modern FTDI-based board would be https://www.diygadget.com/tiao-usb-multi-protocol-adapter-jtag-spi-i2c-serial but SRST line there is push-pulled and not OD like it should. Also SWD is not implemented properly, it's just the resistor hack integrated and I'm not sure if it even goes through the voltage shifter.
<PaulFertser>
And it offers real SWD support thanks to that CPLD.
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<Dracos-Carazza>
ah nice :-)
<Dracos-Carazza>
thanks for the recommendation :-)
<PaulFertser>
I've used Olimex at $job and was happy with it (didn't need SWD back then).
<PaulFertser>
TUMPA I have here and in general I'm glad to have such a device.
<PaulFertser>
Unfortunately its second interface has no level shifters. But I'm going to use it right now for 3.3 V UART.
<PaulFertser>
Also FTDI-based adapters come handy when some flashrom work is needed.
<Dracos-Carazza>
yeah, currently I don't have any need for a real rs232 interface, instead logic level uart would be great
<Dracos-Carazza>
I had to do some low level bsp stuff in the last months also on cortex-a devices for my job. In theory I could also get a Lauterbach power debug, but his always comess with additional license costs
<PaulFertser>
Dracos-Carazza: the problem is that no level shifters means no support for anything outside 3.0 V -- 3.6 V.
<PaulFertser>
So 1.8 V UART is problematic with TUMPA :/
<PaulFertser>
While it's possible with DP busbblaster if you can do a quick CPLD job.
<Dracos-Carazza>
hmm ok
<Dracos-Carazza>
at least the option for 1.8V uart would be great
<PaulFertser>
I needed 1.8 V once and I did it with TUMPA: used the second interface for receiving and the JTAG interface for sending :)
<PaulFertser>
So had two minicoms open but that was OK.
<Dracos-Carazza>
Most targets I worked with the last year had dedicated FTDI chips onboard for their serial
<PaulFertser>
You probably worked with demo boards
<Dracos-Carazza>
Automtive ECUs or reference boards from the corresponding SOC providers ;)
<PaulFertser>
So not COTS mass produced devices
<PaulFertser>
Or are consumer ECUs equipped with USB these days?
<Dracos-Carazza>
nope :D
<PaulFertser>
I had a carb on my single cylinder motorbike. Can't say I ever wished it had an ECU.
<Dracos-Carazza>
130$ would still be ok if the feature set justifies it
<Dracos-Carazza>
Would be great to support Esden and 1bitsquared. I met him ~10 years ago in person on a CCC Camp and we drank some beer. Also I knew him from my activities in different drone projects back then
<Dracos-Carazza>
need to check if 180$ would be still ok
<PaulFertser>
Not many people reported here using Glasgow for JTAG specifically
<PaulFertser>
It's not just Esden (I remember him since summon-arm-toolchain days) but also many other cool devs.
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