DLP2000: DLP LightCrafter Display 2000 EVM with beaglebone black can not start

Hello user,

If the EVM is capable of turning on and displaying splash screen when powered on alone, then it is unlikely there is anything wrong with your EVM hardware. In this case, it is likely that something just needs to be configured on the BeagleBone side.

Before we get into that, I can elaborate on the EVM jumpers. J3's ends are connected to power and ground respectively, and provide a means to power the EVM if you don't want to use the DC power plug. For normal operation you should not connect this header with a jumper. J4 and J5 allow you to modify the address of the EEPROM on the device. This allows you to change how to address the EEPROM in special use cases. Again, for typical operation you don't need to modify these jumpers or connect them.

If the DLP2000 EVM is not coming up with a splash screen when connected to the BBB, then it likely means that the EVM drivers are not loading for some reason on the BBB. The quickest way to debug this would be to verify and, if necessary, install the EVM drivers manually to your system. Start by using the tutorial below to verify if the cape overlay is actually installed/loaded to your BeagleBone when you boot with the EVM installed:
cdn-learn.adafruit.com/.../introduction-to-the-beaglebone-black-device-tree.pdf

Assuming it is isn't, you can follow the instructions in this thread to reinstall the drivers yourself:
e2e.ti.com/.../663939

Let me know if you encounter any difficulties with these steps. I hope this helps.

Best Regards,
Philippe Dollo

Tried everything possible, but no success.

The guides are outdated.

When trying to compile your recommended .dts
with the following:
dtc -O dtb -o 4807.DLPDLCR2000_2D00_00A0.dtbo -b 0 -@ 4807.DLPDLCR2000_2D00_00A0.dts

Error: ./DLPDLCR2000.dts:11.1-9 syntax error2000.dtbo -b 0 -@ ./DLPDLCR2000.dts
FATAL ERROR: Unable to parse input tree

Found this guide, pretty detailed and decent:
www.element14.com/.../dlp-pico-display-projector-evm-beaglebone-black-review
Installed latest recommended Debian.

i2cdetect -r -y 2 gives nothing
i2cdetect -r -y 0 gives nothing

debian@beaglebone:~$ dmesg | grep DLP
[ 0.000000] Kernel command line: console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1 root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait uboot_detected_capes=DLPDLCR2000, coherent_pool=1M net.ifnames=0 quiet

This file is present:
/sys/firmware/devicetree/base/__symbols__/DLP2607

/sys/firmware/devicetree/base/ocp/i2c@4819c000/DLP2607/name
contains DLP2607.

cat /sys/bus/i2c/devices/i2c-2/2-0070/uevent

OF_NAME=DLP2607
OF_FULLNAME=/ocp/i2c@4819c000/DLP2607@36
OF_COMPATIBLE_0=DLP2607
OF_COMPATIBLE_N=1
MODALIAS=i2c:DLP2607

however, i2cdetect -y -r 2 does not result in any device on address 0x70, not 0x1b
debian@beaglebone:~$ i2cdetect -r -y 2
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: -- -- -- -- -- -- -- --


- how do I turn the device on or check its I2C function?
- how do I figure out if the device is HW or firmware defective?

i just want a beaglebone black wifi SD card that has been proven to work with the DLP2000 EVM, no matter how old or outdated.


Thx

any news on this?

User,

It looks like you sent me a friend request on E2E. I have accepted it, so you can address me privately if you so choose.

Have you tried adding the "ti,beaglebone-black-wireless" entry to the list of compatible devices before compilation? You may need to make some edits to the cape overlay file before it is compatible with your BeagleBone Black Wireless. You should also compare the pinouts of the BBBW with the BBB to ensure they match, and adjust as necessary.

I2C communication with the EVM is not limited to the BBBW, and you can potentially use any I2C-compatible device to interface with the EVM's I2C lines. The DLPDLCR2000EVM show's where these lines are located:
www.ti.com/.../dlpu049c.pdf

As for the I2C commands themselves, there is a list of compatible I2C commands you can use (with or without the BBBW):
www.ti.com/.../dlpu013.pdf

If the EVM can be powered on standalone, and properly loads the splash screen, then the EVM itself is functioning properly. The system cannot boot to splash screen without the basic system functions working.

I hope this helps.

Best Regards,
Philippe Dollo