I'm working on my first imxRT system (imxRT1020-EVK right now), just trying to understand how to program a "bare" board; ultimately for use on my custom hardware. My goal is to just use the ROM based serial downloader over USB, so I started playing with imx_usb_loader tool from Boundary Devices. Using that I was able to read/write OCRAM, push a character out the LPUART1 interface, etc... Just enough to know that the interface does work.
The next step would be to actually push a bootable image to the SPI flash on board; but that gets a bit more complicated. Has anyone used that tool for iMXRT systems? If yes, any tips? If no, what is the common approach for doing this?
Seems I can also use MCUXpresso or MfgTool, but I'd prefer to stick with a command line interface if possible.