DLPDLCR2000EVM: Create diffraction patterns with the DLP2000

To be more clear, I want to create my own diffraction patterns and display them. I was able to use the structured_light folder and the corresponding Makefile to display the default solid-color patterns using pattern_disp, and now I want to make my own. 

Thank you for the reply!

The only software I know so far that contains custom images is what is given in the structured_light folder. Using the programmer's guide, I was able to implement the i2c commands to display these images. I have tried it, along with the ./pattern_disp command, and they both work fine. Now, I would like to code and display my own diffraction pattern if possible. Are you saying that I am able to create my own bitmap files and run them in the same folder to produce my own pattern? If so, is there some sort of guide to help me in the process of creating these bitmap files (as I did not see anything about this so far in documentation)? Thank you.

Hi Russell,

I tried to use the structured_light folder and the corresponding Makefile as well but it seems nothing happened to my beaglebone desktop. Is there something wrong with my steps? i thought maybe that commands should be used during my video playing but i can not do anything during the period of running time.

Many thanks

Zhou

Zhou,

Can you share your terminal output log?

Regards,

Philippe Dollo

Hi sir,

Script started on Thu 07 Nov 2019 12:08:01 PM UTC
debian@beaglebone:~$ cd /opt/scripts/device/bone/capes/DLPDLCR2000/structured_lig^Mght ^H^[[K/
debian@beaglebone:/opt/scripts/device/bone/capes/DLPDLCR2000/structured_light$ m ^Make all
gcc -o pattern_disp open_bmp.c display_core.c display_app.c -O3  -std=gnu89
debian@beaglebone:/opt/scripts/device/bone/capes/DLPDLCR2000/structured_light$ ./^M/pattern_disp
Usage: pattern_disp [options] framerate repetitions

Options:
 -test (-t)     run through built in test patterns
 -in (-i)       use the trigger in (GPIO115) to advance to next pattern instead$
 -persist (-p)  the last pattern will stay on the screen at the end of the sequ$
 -kill (-k)     stop running the X-server (sometimes gets better results and hi$
 -video (-v)    don't disable any of the video processing algoirthms on the EVM$
 -restart (-r)  stop running the X-server and restart the X-server when done
debian@beaglebone:/opt/scripts/device/bone/capes/DLPDLCR2000/structured_light$ $
Floating point exception
debian@beaglebone:/opt/scripts/device/bone/capes/DLPDLCR2000/structured_light$ cd^Md /opt/scripts/device/bone/capes/DLPDLCR2000/
debian@beaglebone:/opt/scripts/device/bone/capes/DLPDLCR2000$ tar -xvf dlp_lightc^Mcrafter-1.0.19.tar.gz
dlp_lightcrafter-1.0.19/
dlp_lightcrafter-1.0.19/dlp_lightcrafter/
dlp_lightcrafter-1.0.19/dlp_lightcrafter/datalog.py
dlp_lightcrafter-1.0.19/dlp_lightcrafter/dpp2607.py
dlp_lightcrafter-1.0.19/dlp_lightcrafter/enum.py
dlp_lightcrafter-1.0.19/dlp_lightcrafter/i2c.py
dlp_lightcrafter-1.0.19/dlp_lightcrafter/linuxi2c.py
dlp_lightcrafter-1.0.19/dlp_lightcrafter/version.py
dlp_lightcrafter-1.0.19/dlp_lightcrafter/__init__.py
dlp_lightcrafter-1.0.19/dlp_lightcrafter.egg-info/
dlp_lightcrafter-1.0.19/dlp_lightcrafter.egg-info/dependency_links.txt
dlp_lightcrafter-1.0.19/dlp_lightcrafter.egg-info/PKG-INFO
dlp_lightcrafter-1.0.19/dlp_lightcrafter.egg-info/SOURCES.txt
dlp_lightcrafter-1.0.19/dlp_lightcrafter.egg-info/top_level.txt
dlp_lightcrafter-1.0.19/PKG-INFO
dlp_lightcrafter-1.0.19/README.txt
dlp_lightcrafter-1.0.19/setup.cfg
dlp_lightcrafter-1.0.19/setup.py
debian@beaglebone:/opt/scripts/device/bone/capes/DLPDLCR2000$ cd dlp_lightcrafter^Mr-1.0.19
debian@beaglebone:/opt/scripts/device/bone/capes/DLPDLCR2000/dlp_lightcrafter-1.0^M0.19$ sudo python setup.py install
[sudo] password for debian:
running install
Checking .pth file support in /usr/local/lib/python2.7/dist-packages/
/usr/bin/python -E -c pass
TEST PASSED: /usr/local/lib/python2.7/dist-packages/ appears to support .pth files
running bdist_egg
running egg_info
writing dlp_lightcrafter.egg-info/PKG-INFO
writing top-level names to dlp_lightcrafter.egg-info/top_level.txt
writing dependency_links to dlp_lightcrafter.egg-info/dependency_links.txt
reading manifest file 'dlp_lightcrafter.egg-info/SOURCES.txt'
writing manifest file 'dlp_lightcrafter.egg-info/SOURCES.txt'
installing library code to build/bdist.linux-armv7l/egg
running install_lib
running build_py
creating build/bdist.linux-armv7l/egg
creating build/bdist.linux-armv7l/egg/dlp_lightcrafter
copying build/lib.linux-armv7l-2.7/dlp_lightcrafter/__init__.py -> build/bdist.linux-armv7l/egg/dlp_lightcrafter
copying build/lib.linux-armv7l-2.7/dlp_lightcrafter/i2c.py -> build/bdist.linux-armv7l/egg/dlp_lightcrafter
copying build/lib.linux-armv7l-2.7/dlp_lightcrafter/linuxi2c.py -> build/bdist..linux-armv7l/egg/dlp_lightcrafter
copying build/lib.linux-armv7l-2.7/dlp_lightcrafter/enum.py -> build/bdist.linux-armv7l/egg/dlp_lightcrafter
copying build/lib.linux-armv7l-2.7/dlp_lightcrafter/datalog.py -> build/bdist.linux-armv7l/egg/dlp_lightcrafter
copying build/lib.linux-armv7l-2.7/dlp_lightcrafter/dpp2607.py -> build/bdist.linux-armv7l/egg/dlp_lightcrafter
copying build/lib.linux-armv7l-2.7/dlp_lightcrafter/version.py -> build/bdist.linux-armv7l/egg/dlp_lightcrafter
byte-compiling build/bdist.linux-armv7l/egg/dlp_lightcrafter/__init__.py to __init__.pyc
byte-compiling build/bdist.linux-armv7l/egg/dlp_lightcrafter/i2c.py to i2c.pyc
byte-compiling build/bdist.linux-armv7l/egg/dlp_lightcrafter/linuxi2c.py to lin$
byte-compiling build/bdist.linux-armv7l/egg/dlp_lightcrafter/enum.py to enum.pyc
byte-compiling build/bdist.linux-armv7l/egg/dlp_lightcrafter/datalog.py to data$
byte-compiling build/bdist.linux-armv7l/egg/dlp_lightcrafter/dpp2607.py to dpp2$
byte-compiling build/bdist.linux-armv7l/egg/dlp_lightcrafter/version.py to vers$

creating build/bdist.linux-armv7l/egg/EGG-INFO
copying dlp_lightcrafter.egg-info/PKG-INFO -> build/bdist.linux-armv7l/egg/EGG-$
copying dlp_lightcrafter.egg-info/SOURCES.txt -> build/bdist.linux-armv7l/egg/E$
copying dlp_lightcrafter.egg-info/dependency_links.txt -> build/bdist.linux-arm$
copying dlp_lightcrafter.egg-info/top_level.txt -> build/bdist.linux-armv7l/egg$
zip_safe flag not set; analyzing archive contents...
creating 'dist/dlp_lightcrafter-1.0.19-py2.7.egg' and adding 'build/bdist.linux$
removing 'build/bdist.linux-armv7l/egg' (and everything under it)
Processing dlp_lightcrafter-1.0.19-py2.7.egg
removing '/usr/local/lib/python2.7/dist-packages/dlp_lightcrafter-1.0.19-py2.7.$

Extracting dlp_lightcrafter-1.0.19-py2.7.egg to /usr/local/lib/python2.7/dist-p$
dlp-lightcrafter 1.0.19 is already the active version in easy-install.pth

Installed /usr/local/lib/python2.7/dist-packages/dlp_lightcrafter-1.0.19-py2.7.$
Processing dependencies for dlp-lightcrafter==1.0.19
Finished processing dependencies for dlp-lightcrafter==1.0.19
debian@beaglebone:/opt/scripts/device/bone/capes/DLPDLCR2000/dlp_lightcrafter-1$
debian@beaglebone:/opt/scripts/device/bone/capes/DLPDLCR2000/dlp_lightcrafter-1$
debian@beaglebone:/opt/scripts/device/bone/capes/DLPDLCR2000$ Processing^H^[[K^$

Make sure the display port is set. For example export DISPLAY=:0

1
SourceSel.EXTERNAL_VIDEO_PARALLEL_I_F_
2
Resolution.NHD_LANDSCAPE
##################################################################
play video
nhd_test.mp4
^[[0mPlaying: nhd_test.mp4
^[[0m^[[0m (+) Video --vid=1 (*) (h264)
^[[0mlibEGL warning: DRI2: failed to authenticate
^[[0;33m[vo/opengl] Suspected software renderer or indirect context.
^[[0m^[[0;33m[vo/opengl] Suspected software renderer or indirect context.
^[[0mFailed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object$
^[[0;31m[vo/vdpau] Error when calling vdp_device_create_x11: 1
^[[0m^[[0;31m[vo/xv] No Xvideo support found.
^[[0m^[[0m[vo/sdl] Using opengl
^[[0m^[[0mVO: [sdl] 640x360 yuv420p
^[[0m^[[0m[osd/libass] PlayResX undefined, setting to 960
^[[0m^M^[[K^[[0mV: 00:00:00 / 00:00:22 (0%)^M^[[0m^M^[[K^[[0mV: 00:00:00 / 00:0$
^[[0m
^[[0m^[[0m
^[[0m^[[0mExiting... (Quit)
^[[0mNone
Does the video play on the screen? (Pass/Fail/Stop) (Pass/Fail/Stop) and commen$
debian@beaglebone:/opt/scripts/device/bone/capes/DLPDLCR2000$ cd
debian@beaglebone:~$ exiu^H^[[Kt
exit

Here is my step below:

1. Navigate to /opt/scripts and do a “git pull”.
2. Within the /opt/scripts/device/bone/capes/DLPDLCR2000/structured_light directory
3. View the code and run the make file (“make all”).
4. Enter “./pattern_disp” to run the program and view its options.
5. Running “./pattern_disp –t” will run a couple test patterns to confirm correct operation.

Play fishbowl video:
6. cd /opt/scripts/device/bone/capes/DLPDLCR2000/
7. tar -xvf dlp_lightcrafter-1.0.19.tar.gz
8. cd dlp_lightcrafter-1.0.19
9. sudo python setup.py install
10. export DISPLAY=:0
11. cd /opt/scripts/device/bone/capes/DLPDLCR2000/
12. python MplayerTest.py


Thank you!

Zhou

Hi,

Sorry, how to verify that my X11 setup is good? Does 'Debian 9.9 2019-08-03 4GB SD LXQT' should be ok?

I use Putty on PC and show BeagleBone desktop by DLP2000.

For now, I sent some .bmp files into the current file (/opt/scripts/device/bone/capes/DLPDLCR2000/structured_light directory). There's still nothing changed on my Beaglebone desktop. Should somthing else be changed in any .c files?

-rw-r--r-- 1 debian debian 10352 Aug 4 02:37 display_app.c
-rw-r--r-- 1 debian debian 2141 Aug 4 02:37 display_app.h
-rw-r--r-- 1 debian debian 12527 Aug 4 02:37 display_core.c
-rw-r--r-- 1 debian debian 2861 Aug 4 02:37 display_core.h
-rw-r--r-- 1 debian debian 1682130 Nov 18 20:18 holdthis.bmp
-rw-r--r-- 1 debian debian 2037 Nov 7 00:15 Makefile
-rw-r--r-- 1 debian debian 485814 Nov 18 20:27 next.bmp
-rw-r--r-- 1 debian debian 5526 Aug 4 02:37 open_bmp.c
-rw-r--r-- 1 debian debian 2050 Aug 4 02:37 open_bmp.h
-rwxr-xr-x 1 debian debian 18656 Nov 18 20:25 pattern_disp
-rw-r--r-- 1 debian debian 1085 Nov 7 12:01 README.md

Thank you!

Zhou

Hi

Thank you for helping!! It works once I update my board again. 

Then I tried to put my .bmp files into current program directory. However, it shows an error with the image width:

[debian@beaglebone:/opt/scripts/device/bone/capes/DLPDLCR2000/structured_light$ ./pattern_disp -p
Incorrect width
Unable to proceed]

Size of .bmp file I used is 360*640 according to open_bmp.file.

Another quick question, How to connect to SSH by root?  I find an instruction but it still doesn't work...

The reason why i do so is that i want to connect BBB with MATLAB.

Here is the instrcution:

as of 2017-02-19, BeagleBoard images now longer enable these insecure options by default, you are free to recreate them as you wish.

remove root password

root_password=$(cat /etc/shadow | grep root | awk -F ':' '{print $2}')
sed -i -e 's:'$root_password'::g' /etc/shadow

ssh root@beaglebone.local

sed -i -e 's:PermitEmptyPasswords no:PermitEmptyPasswords yes:g' /etc/ssh/sshd_config
sed -i -e 's:UsePAM yes:UsePAM no:g' /etc/ssh/sshd_config
sed -i -e 's:PermitRootLogin without-password:PermitRootLogin yes:g' /etc/ssh/sshd_config

sudo no password required

echo "debian  ALL=NOPASSWD: ALL" >>/etc/sudoers


Sincerely
Zhou 

Hi

Thank you very much!

1. According to the User manual of DLPC2607, It is easy to use i2c to project SELECTED test patterns and implement other commands. 

I guess there should be some ways to change the built-in test patterns, like finding them in somewhere in host perhaps.

2. Although I can use i2c as expected, I can see 0x00 values in all registers. And there are no changes in value when I use commands.

debian@beaglebone:~$ i2cdetect -l
i2c-2 i2c OMAP I2C adapter I2C adapter
i2c-0 i2c OMAP I2C adapter I2C adapter

debian@beaglebone:~$ i2cdetect -r 2
WARNING! This program can confuse your I2C bus, cause data loss and worse!
I will probe file /dev/i2c-2 using read byte commands.
I will probe address range 0x03-0x77.
Continue? [Y/n] y
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- UU UU UU UU -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

debian@beaglebone:~$ i2cdump 2 0x1b
No size specified (using byte-data access)
WARNING! This program can confuse your I2C bus, cause data loss and worse!
I will probe file /dev/i2c-2, address 0x1b, mode byte
Continue? [Y/n] y
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................

Regards,

Zhou

Hi,

Thank you for replying to me.

I can follow that GUIDE to project the ready-made test patterns. However, I am looking for a solution to direct replace them not simply changing the projection sequence of them.

And any clue on why there are all zero values in registers? 

Regards

Zhou