Tool for converting image to binary form for storing in FPGA

[davorin]

EHLO (o;

Does someone know of a tool or script which can take a PNG/TIFF/whatever RGB image and convert it to a raw binary data representation for converting then to Intel HEX format which Altera Quartus accepts?

This is for testing my Verilog RGB panel driver design....

[Siwastaja]

GIMP can save a headerless RAW, just type in extension .data when saving. RGBRGB... and RRRBBBGGG formats are supported. Then, you only need to convert it to Intel HEX.

[janoc]

ImageMagick
https://www.imagemagick.org/script/index.php

Easier to script/integrate into a build system.

[davorin]

Tried ImageMagick with

convert icon.png icon.rgb

but output file seemed rubbish....thought convert recognizes input/output formats automatically.
The filesize was exact though for a 64x64 rgb image..

[Wiljan]

Irfanview does save as RAW with different options

[chris_leyson]

Matlab or GNU Octave will do it.

[janoc]

Tried ImageMagick with

convert icon.png icon.rgb

but output file seemed rubbish....thought convert recognizes input/output formats automatically.
The filesize was exact though for a 64x64 rgb image..

Use the .raw extension instead and the "stream" tool:

stream input.png output.raw

[hamster_nz]

Being old-school I save in PMN format, then use a short program, that can use the attributes in the human readable ASCII  header.

[@rt]

Singe it’s an RGB panel, is there a reason not to use MSPaint to open the file, save as 24 bit MS bitmap, and then manually strip the header with a hex editor?

[davorin]

Ah I see what the problem is...nothing to do with rgb conversion (o;

Did a small 64x64 rgb png with just a red dot on black backrground...
The generated hex file is correct and shows that the first occurrence of rad is at address 0x07CE (28):

Code: [Select]

:2007C00000000000000000000000000000002800005F00008F0000B90000DA0000F100007F

The used memory is organized as 24x4096...and when looking with the in-system memory controller....the same pattern appears at 24-bit word address:
So seems quartus messes up with the hex file when the memory is not organized as 8-bit wide..

[davorin]

Seems there are no tools which can generate a 24-bit wide memory initialization file....

srec_cat supports mif files, but only with widths being a multiple of 8 like:

Code: [Select]

srec_cat icon.rgb -binary -output icon.mif -mif 1
srec_cat icon.rgb -binary -output icon.mif -mif 2
srec_cat icon.rgb -binary -output icon.mif -mif 4
Seems I have to split the rgb channels in 3 8-bit wide memories.

This are the commands used for generating 3 memory initialization files for Quartus:

Code: [Select]

convert image.png -separate image_%d.gray
srec_cat image_0.gray -binary -output image_0.mif -mif
srec_cat image_1.gray -binary -output image_1.mif -mif
srec_cat image_2.gray -binary -output image_2.mif -mif