Then you plug it in and it'll be seen as a STM32 in DFU mode. Some clones seem to have it now.įor reprogramming, you set the jumper (or flip your DIP switch) and short the DBGRQ (debug request) pin to ground (best/easiest way is to short pins 17 and 18 of the JTAG connector together with a jumper). It's not super hard to do but it's hassle that would be easily avoided with the right jumper. The switch is glued on the PCB with 2 part epoxy glue, and the terminals isolated from the PCB with kapton tape underneath. So I had to cut a 0.5mm long trace, solder a wire-wrap on the MCU pin which goes to a pull down resistor and also to a SMT DIP switch connected to 3.3V (no easy way to add a jumper to a PCB after design). But if you don't like unnecessary drama, make sure it has a programming jumper on pin 60 of the STM32. I got a legit v9 at work but it's kinda pricey for home use so I tried a cheap clone. I needed something newer than a v8 for newer MCUs. Does anybody have any experience with them, or know anything about them? Recently I've seen J-Link v9 units advertised on ebay.
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