Programming the board?
twopoint718 opened this issue · comments
It looks like "Programming" is coming up an a future installment, but in the mean time could you comment on what sort of debugger/programmer one would need to be able to program this board? For example, would a J-Link (SWD) work?
And thanks for the very clear intro to KiCad!
I have an assembled board ready to program.
Could anyone comment of how this is done?
It may be overkill, but I've picked up a J-LINK EDU which (should) work with pretty much any Cortex-M μC. While googling around I saw that the black magic probe may also work as well. I'll update this issue when I can confirm with my own hardware.
@GHvsBB Okay, I can confirm that I can program the board using a J-Link (EDU model). I used the SWD debugging connection. You'll need to connect up the header pins as follows:
| Header pin | Function | JTAG 20-pin connector |
|---|---|---|
| 1 | SWDIO | 7 |
| 2 | +3.3V | 1 (VTRef) |
| 3 | SWCLK | 9 |
| - | N/C | - |
| 5 | RESET | 15 |
| 6 | GND | 4 |
I'd imagine that there's some kind of breakout/adapter but I just used jumper wires. The VTRef connection is so that the debugger knows the board voltage level (3.3V). There's a separate +5V pin (no. 19) that could be used to supply power to the board (since the board has a voltage regulator), but I didn't use it.
Sorry - I'm not used to having issues in my repos and totally didn't notice your question!
I used a cheap ST-Link V2 clone I found on eBay to program it with SWD.
I am planning to write this up at some point, although it ended up being more complicated than I expected because it required OpenOCD to be patched because of the cheap programmer!
If you're interested, I could write up what I did and run that by you. I was thinking of blogging that anyway.