nanoDLP

Hi Shahin,

Would it be possible to have nanodlp take a parameter such as --display=5 and redirect the output to hdmi. Omxplayer successfully does this and you can use dual displays with it. This will be a very useful feature.

Thank you.

The display works perfectly. I was doing some more research on this and found out that the issue is due to raspberry pi having only one frame buffer by default. This can be changed by recompiling the kernel, which I did, but it requires a USB based display via a displaylink adapter. So, when you output am image, are you using /dev/fb0 or is the hdmi being referenced directly?

I had the same issue. Problem was with the "Waitfordonemessage" commands in gcode. The grbl 0.8c that I am using does not seem to be compatible with the RAMPs sync module in nanodlp. Remove those commands and see if it works. You may want to put a delay instead.

This is what I see once the print is initiated:

Notice    1    2016-11-26 00:42:13.967548    Projector    Projector on
Debug    1    2016-11-26 00:42:13.967409    Shutter    Shutter Close
Debug    1    2016-11-26 00:42:13.96729    Image    Clear screen
Notice    0    2016-11-26 00:42:13.94763    Projector    Projector on

And after a while, there is a fault (there is lot more in the output, this is just the tail end of it):

goroutine 69621 [runnable]:
syscall.Syscall(0x6, 0x11, 0x0, 0x0, 0x0, 0x0, 0x0)
    /usr/local/go/src/syscall/asm_linux_arm.s:17 +0x8
syscall.Close(0x11, 0x0, 0x0)
    /usr/local/go/src/syscall/zsyscall_linux_arm.go:296 +0x44
os.(*file).close(0x10c498b0, 0x0, 0x0)
    /usr/local/go/src/os/file_unix.go:140 +0x54
os.(*File).Close(0x10b6e3f8, 0x0, 0x0)
    /usr/local/go/src/os/file_unix.go:132 +0x54
io/ioutil.WriteFile(0x4d8d60, 0x12, 0x10c8d7a0, 0xd1, 0x103, 0x1b6, 0x0, 0x0)
    /usr/local/go/src/io/ioutil/ioutil.go:85 +0xdc
main.jsonSave(0x4d8d60, 0x12, 0x4bed70, 0x6929b0)
    /home/pi/printer/app/db.go:543 +0x20c
main.(*StatusStruct).Save(0x6929b0)
    /home/pi/printer/app/db.go:471 +0x64
created by main.setLayer
    /home/pi/printer/app/printing.go:243 +0x9c

trap    0x6
error   0x0
oldmask 0x0
r0      0x0
r1      0x58e
r2      0x6
r3      0x0
r4      0x76d54094
r5      0x76a49460
r6      0x0
r7      0x10c
r8      0x1
r9      0x76baa6d0
r10     0x109005a0
fp      0x674948
ip      0x76a49920
sp      0x76a48a88
lr      0x76c43f44
pc      0x76c43f70
cpsr    0x20000010
fault   0x0

It displays the calibration image on hdmi and vga remains blank. I want to use vga as the information panel.

I got it to work, but it wasn't that easy. My WiFi doesn't work unless nanodlp is started. So, I had to connect it through a wired connection first and then enable WiFi.

I am trying to avoid the use of a networked connection to the pi. I will see how it performs with the x server. BTW, is there a command line interface to nanodlp? This could be useful to fire up print jobs.