Progress! Did you get the Chinese dongle to work? If you remove JP24, 27,28 and connect the dongle into these
it should go directly to target and bypass K20, but its a weird schematic. But J16 also seams go directly to same
SWO target pins so you have disconnected the K20 dongle basically buy removing JP24, 27,28 .
I have to verify the SMD pads on the bottom side of the Jlink OB, I'm sure that some must be the Reset signal, I think it's essential for the SWD to work, as soon as I check it, if it's available, I'll connect it and try it.
And on Jlink V9, I will also try to connect the Reset cable. In any case, some people inform me that using JTAG is faster than with SWD, so for my own custom board, I will put a JTAG, IDC 2x5 or 2x6 connector with a flat cable, for use with Jlink V9 or Multilink.
I already have all the information to design my own board with RT1020 LQFP100. I will put QSPI, a micro SD card, probably a micro USB to test the firmware load with the MFG tool, and some components for my own product (a RGB LED display with Chinese HUB75 panels).
I will design the PCB throughout this week, and I will send it to JLCPCB to make it, I hope to receive it and assemble it in about a week.
I am very excited about the RT1020, it is a fantastic microcontroller, very powerful and cheap, Cortex M7, 500 Mhz, it is the best, a beast. Also, now, I am reading the Reference Manual to know how to configure and use the DMA, for me essential for my applications.
My idea is to migrate all my current projects with STM32 and Kinetis to RT1020. I also look forward to NXP releasing the RT1020 LQFP144, it seems that this will be by the end of this year.
The problem with the LQFP100, is that for my applications, it does not have enough I/O ports if I want to connect an SDRAM (to load and run larger programs, with maximum performance). With my current design only 25 I/O ports would be free, and SDRAM I think that need 39 I/O ports.
Unfortunately NXP, for now it has only released the LQFP100, I will try my design without SDRAM, but as soon as the LQFP144 is available, it is the one that I will definitely use almost always.