nanoDLP

I'll give it a try tomorrow, I think the binary wasn't compatible or something.

ender,

Do it crashes after pigpio error? Try set framebuffer path see if it makes any difference.

I should prevent rpi depend libraries get initialized.

Currently we use golang flags for arch and os to differentiate versions. (it works very elegantly)  Now all of these boards are linux and arm so I need to find better way to handle this scenario.

Good workaround, actually I have found a good way. It is possible to use custom build tag so different -tags RPi could be used.
Also as I see we have two issues. One with RPi BCM and another one with EGL. EGL is depend on desktop env.

We probably should have following installations
ARM RPi - Without X
ARM Generic - Without X (-EGL -BCM)
ARM Generic - With X/Desktop (-BCM)

On my Banana Pi board, it starts up, and it slices, and machine control over serial works fine.  Video works too on my 1080p desktop monitor, had to disable the text cursor manually (vt.global_cursor_default=0 kernel parameter).  Also the program crashes when trying to display the static full HD calibration image:

panic: interface conversion: image.Image is *image.Gray, not *image.RGBA

goroutine 806 [running]:
projects/printer/app/renderer/img.LoadPix(0x119987b0, 0x28, 0x0, 0x0, 0x0)
	/home/shahin/go/src/projects/printer/app/renderer/img/loader.go:39 +0xec
projects/printer/app/viewer/fb.(*RGBA).Display(0x109553e0, 0x119987b0, 0x28, 0x2, 0x2)
	/home/shahin/go/src/projects/printer/app/viewer/fb/fb_linux.go:102 +0x24
projects/printer/app/viewer/fb.DisplayImage(0x119987b0, 0x28, 0x426fff)
	/home/shahin/go/src/projects/printer/app/viewer/fb/fb_linux.go:70 +0x30
main.showFrame(0x119987b0, 0x28, 0x21)
	/home/shahin/go/src/projects/printer/app/hardware.go:107 +0x13c
created by main.projectorDisplay
	/home/shahin/go/src/projects/printer/app/web.go:197 +0xe4

No big deal, the dynamic calibration plates work fine.  The oddly dimensioned LCD in the D7 doesn't appear to be recognized by this old A20 board, so I'll wait for my H3 boards to arrive to test on the printer some more.
Cheers!

Armbian 5.30/jessie. Three issues so far:
1. when I try do display a the calibration image there is an error / panic (exit to prompt):
2017/08/26 18:07:34.751888 {"Layer":"1","module":"Image","level":"Warning","msg":"Display layer public/plates/dynamic.png"}
panic: runtime error: slice bounds out of range

goroutine 86 [running]:
projects/printer/app/viewer/fb.(*RGBA).Display(0x109d40e0, 0x494fc2, 0x19, 0x2, 0x2)
        /home/shahin/go/src/projects/printer/app/viewer/fb/fb_linux.go:106 +0x78
projects/printer/app/viewer/fb.DisplayImage(0x494fc2, 0x19, 0x426fff)
        /home/shahin/go/src/projects/printer/app/viewer/fb/fb_linux.go:70 +0x30
main.showFrame(0x494fc2, 0x19, 0x494fc2)
        /home/shahin/go/src/projects/printer/app/hardware.go:107 +0x13c
created by main.projectorGenerate
        /home/shahin/go/src/projects/printer/app/web.go:218 +0x140
root@orangepione:~#
Dynamic calibration, boundaries, full white, full HD ...the same result.

2. Printing calibration plate : panic:
2017/08/26 18:23:30.535782 {"Layer":"1","module":"Calibration","level":"Warning","msg":"Printing layer 1 from 100"}
2017/08/26 18:23:42.536760 {"Layer":"1","module":"Image","level":"Warning","msg":"Display layer public/plates/0/1.png"}
panic: runtime error: slice bounds out of range

goroutine 103 [running]:
projects/printer/app/viewer/fb.(*RGBA).Display(0x10961500, 0x10912d40, 0x15, 0x2, 0x2)
        /home/shahin/go/src/projects/printer/app/viewer/fb/fb_linux.go:106 +0x78
projects/printer/app/viewer/fb.DisplayImage(0x10912d40, 0x15, 0x426fff)
        /home/shahin/go/src/projects/printer/app/viewer/fb/fb_linux.go:70 +0x30
main.showFrame(0x10912d40, 0x15, 0x15)
        /home/shahin/go/src/projects/printer/app/hardware.go:107 +0x13c
main.printCalibration(0x1)
        /home/shahin/go/src/projects/printer/app/printing-calibration.go:45 +0x8ac
created by main.printerStart
        /home/shahin/go/src/projects/printer/app/web.go:667 +0xbc
root@orangepione:~#

3. printing a plate - error but no panic (no exit to prompt):
2017/08/26 18:13:52.197417 {"Layer":"1","module":"Image","level":"Warning","msg":"Display layer public/plates/2/1.png"}
2017/08/26 18:13:52.535976 {"Layer":"1","module":"Printing","level":"Error","msg":"Problem detected, printer paused. Please, solve the issue and resume printing. runtime error: slice bounds out of range"}

Framebuffer path is set to /dev/fb0.

root@orangepione:~# fbset -fb /dev/fb0 -i

mode "1920x1080"
    geometry 1920 1080 1920 2160 32
    timings 0 0 0 0 0 0 0
    rgba 8/16,8/8,8/0,8/24
endmode

Frame buffer device information:
    Name        :
    Address     : 0x56200000
    Size        : 16588800
    Type        : PACKED PIXELS
    Visual      : TRUECOLOR
    XPanStep    : 1
    YPanStep    : 1
    YWrapStep   : 0
    LineLength  : 7680
    Accelerator : No
root@orangepione:~#

/dev/fb0 seems to work : I can "fill" the screen with

cat /dev/urandom >/dev/fb0

and I can set a single pixel with

printf "\x00\xFF\xFF\x00" | dd bs=4 seek=$((100 * 1920 + 100)) >/dev/fb0

Reporting initial success with an Orange Pi PC, Armbian 5.31, Wanhao D7, /dev/fb0.  The key seems to be to switch to the nightly kernel (I used 4.11.5-sun8i) using the armbian-config utility.
Video is correct.  Projector and Z-axis control work fine.  It's not a very fast machine with such demands being made on RAM bandwidth, but it's smaller and cooler than the PC I was using to drive it before.  Thanks again, Shahin!

@ender67, your virtual fb Y size is twice the physical size.  I had the same problem and also the error: slice bounds out of range, until switching to the nightly kernel with armbian-config.