DLP2021LEQ1EVM: EVM not responding after Composer flashing error

Hi Lori,

I followed the instructions; the issue is still present. The EVM is not responding. 

.

Its not working in local host mode also after the crash. Kindly help to fix this issue.

Thanks

Kalaivani K

Hi Kalaivani,

When you said that "The EVM is not responding", can you read/write any registers in the DLP Control Program? What the message is showed in the Command Log window? 

What's the SPI clock rate  when you programming flash in the Flash programming mode through Composer? Please try to slow down the clock rate in the Connections Tab.

Also, please try to only open either Control Program or Composer at a time when connecting with the EVM.

Regards,

Lori 

Hi Lori,

The command log output is as below while running the script. 

When I try to get the values from general tab below errors were seen.

I tried reducing clock speed in composer(4.3MHz and 3MHz) still its failing. 

Thanks

Kalaivani K

Hi Kalaivani,

When you running the script, what's the projected image displayed on the wall? It should be a "Bird" image based on your shared commands in the first screenshot.

The checksum mismatch could be a result of a comm interface issue or if the FPGA is not in the host mute mode. Please turn off the supply power first, and set the operation mode switches to the Host Mute. Then, turn on the supply power, and read back command. 

Were you able to see a racecar video being displayed when you first received the EVM and followed Section 2 Quick start instructions in the EVM User's guide?

Regards,

Lori 

Hi Lori,

The Racecar video was displayed at first. Even i was able to change image with via control program. 

When I tried to change via composer program it stopped working. 

The DLP stopped working in both modes, no image or video is shown after that. 

Thanks

Kalaivani K

Hi Kalaivani,

It's likely a SPI interface issue. Please use a logic analyzer/oscilloscope to probe on the SPI_CLK, SPI_CSZ, SPI_MOSI, and SPI_MISO signals, and check if you can get the proper waveforms. 

If you have an extra FTDI cable, please try to replace.

Regards,

Lori 

Hi Lori,

Good day.

I tried changing the SPI cable, still same issue. Is there any other way to debug/reset the EVM?

Thank you,

Kalaivani K

Hi Kalaivani,

Did you have a chance to probe on the SPI signals that I mentioned above? Have you seen the proper SPI waveforms?

Regards,

Lori 

Hi Lori,

I could check the signals with a scope, as below:

mosi                                                     clk                                               miso 

Thanks

Kalaivani K

Hi Lori,

I probed the SPI signals to oscilloscope to read the values, and found it was always high, the issue was with SPI connection as you said. I changed the cable with proper connections, now i am able to use the control program and composer flashing. its working fine. 

Thank you for your support to resolve the issue.

Could you please tell me if I can change the image/video display with external trigger (eg. ARM controller) in local host mode or Host Mute mode?

Thank you,

Kalaivani K

Hi Kalaivani,

Thank you for confirming and I'm glad it's working now. 

I may need more information about the external trigger you mentioned and the configuration of your design.

For using the TI EVM, you can change the image/video display by using following commands in the Control Program and keep the EVM in local host mode. The Video start address is the video offset information that you can find in your composer project folder -> Build -> BuildLog.html -> video offset information.

Regards,

Lori 

Hi Lori, 

Good Day.

We would like to control the display using a NXP controller(S32KXX). We want to send SPI command from the controller to change the image/video which is already flashed via the composer program. 

Could you kindly provide with the SPI configuration and format. 

1. CLK Frequency

2. CPOL, CPHA configuration

3. CS or !CS

4. 8bit/16bit/24bit/32bit?

5. MSB /LSB first?

6. is there any chip enable pin? 

If there any documentation for these details would be helpful. 

Thanks

Kalaivani K

Hi Lori,

I tried sending a Command from NXP S32 controller, with below settings:

Clock:5Mhz

cp = active high, read on odd edge & transfer on falling edge.

cs = active low

data = {0x00,0x20,0x00,0x10,0x00,0x00,0x00,0x30} - flip command (format same as from control program console)

Display is not changing, and I am getting 0xFF from the device. 

Any other parameter to be configured to make it work, am I missing something?

Thank you,

Kalaivani K

Hello Kalavani,

We will look into this and get back to oyu by middle of next week.

regards,
Vivek