Drag&Drop fail with multi-image.

[wuxx]

Drag&Drop fail with multi-image.

[wuxx]

drag-n-drop need the file start with FF 00 00 FF, so it may only support program a single bitstream file, recommend to use the icesprog to program the multiboot image file

[wuxx]

what's the function of icemulti ? is it just conbine these bin file into a whole one image, like the cat command?
when drag-n-drop program, the on-board iCELink will check the file format, check the link here for detail
http://www.clifford.at/icestorm/format.html

[juanmard]

Yes, icemulti is: "IceMulti: A tool for packing multiple bitstream files into one iCE40 multiboot image file."
http://www.clifford.at/icestorm (see icestorm tools)
or code https://github.com/YosysHQ/icestorm/blob/master/icemulti/icemulti.cc

Used to multiple bitstream: https://www.latticesemi.com/view_document?document_id=46502 (Chapter 10)
Not exactly like the cat command, because it include at the begining an «applet zone» with information about four bitstreams.

We would need to jump this applet to verify the format of the file and let it pass.

[juanmard]

Ok, thank you.