DLPDLCR4710EVM-G2: Abnormal flashing when using DPP3439 V7.3.2 img file to drive LED & NEW DMD(DLP4710AFQL)

rongyu tu said:

Part Number: DLPDLCR4710EVM-G2

Hi

  Attached image file shows a abnormal flashing of LED when power on the EVM Board to switch splash patterns. This flashing 

doesn't happen on test pattern switched, and the original FW we used is generated from V7.3.2 project files as fllows. 

Please help us to solve this LED problem.

thanks

Device:

DLPDLCR4710EVM Board

NEW Process DMD(DLP4710AFQL)

SW Tool:

Light Crafter Display V7.0-4710EVM

TIRef_DPP3439_p47-1080P-TRP_v7p3p2-PAD3005-AC-Only-TI-com

Hi Rongyu, 

Welcome to TI E2E Forums! Can you reproduce the same behavior with the prebuilt FW v7.3.2 which is available on TI.com?

Thanks & Regards,

Hirak.

Hi Rongyu,

 i have some follow up questions to understand :

• From where did you get the project file, are you talking about the firmware because on ti.com only firmware is available not project file ?
• If you have the project, What changes have you made in project to create the firmware ? 
• you mentioned that you are seeing flashing while power on the EVM board for switching splash patterns not test patterns, What do you mean by power on the EVM for switching splash patterns, Is this a issue related to power on or the switching splash patterns.... What i understood from video, you turned on the projector and splash screen displays on DMD, now if you change it to another splash then you are seeing this flashing but if you change from same splash to test pattern you are not seeing the flickering. Is my understanding correct ? 
• Have you used the previous firmware version in past, were you faced this flashing in that older version or not ?

Thanks,

Navneet

We tried, but for our hardware design, the setting of DMD pin mapping option part we need a option 1 setting.

Thanks

Rongyu

Hi Naveet

• This project file is provided by TI Field Application Engineer in TAIWAN.
• here we only change the DMD pin mapping to op 1, add more look indexes, adjust the LED current in batch file .
• The following videos can explain a flickering when 1.switching splash pattern, 2.no flickering when switching test pattern, 3. switching between test & splash pattern change.
• Yes, we tried to create a firmware from v7.0.3 file and used to new DMD , but didn't find this flickering problem. 

    Thanks

Hi Navneet

The pin mapping setting is base on our HW design, therefore i can't do another experiment for this.

Yes, i had changed looks and mapping option before v7.0.3 firmware release, those change-values between v7.0.3 and v7.3.2 are practically the same.

  V7.0.3 had another issue such as a pattern mark stay on DMD when turn off engine, therefore we need a new project file to support the new process DMD.    

Thanks