DLPDLCR2000EVM: Some questions about the EVM

Soizic,

Welcome to the E2E forums, and thanks for your interest in our DLP technology. Let me try to answer each of your questions individually:

Q: I don't really understand all datasheets because I don't know the I2C but is that right that I can upload my own video or images on the EVM ? 

A: Typical use for this EVM is to send video and image content to the EVM via the RGB888 (DPI) connection, which is a standard video interface. It accepts video in 50Hz and 60Hz format, and can be programmed to accept a range of video resolutions. Video data is stored temporarily in a frame buffer memory and displayed on the optical projector output as it is received.

Q: If I want to save an image on the memory of the EVM, do I have to change the splash image, the first image when I turn on the EVM? Do I need a microsd to use it after, without a computer ?

A: That is correct. In order to have a image stored on the EVM (which can be displayed without being connected to a host processor or DPI video source) it must be saved as a splash screen. In order to update the splash screens on this EVM, it is necessary to have a means to directly program the SOIC-8 EEPROM flash device which stores the splash screen information on the system. In general, this is not considered a typical use case for this EVM.

Q: I would like my images blinking but I don't know if I can control the LEDs to turn off/on, or if I can control DMD for doing this, or if I upload a video with blinking images. What do you suggest ?

A: The current output of the RGB LEDs can be adjusted, or even turned on and off via I2C. A full list of available commands is available in the DLPC2607 Programmer's Guide [ https://www.ti.com/lit/ug/dlpu013a/dlpu013a.pdf ]. LED control, for example, is on pages 22-24 of this document at this time.

Q: In this datasheet, I saw a connection needed between USB and I2C but if I have the BeagleBoneBlack, it's already done by it, isn't it ?

A: The I2C connection to the EVM is established by the BeagleBone Black, so you are correct that it is already done in that sense. The purpose of the USB connection, however, is to connect the BeagleBone Black to your PC so that you can communicate with the BeagleBone Black (or indirectly communicate with the EVM) over SSH.

Q: Finally, I saw the EVM DLPDLCR2000EVM and a reference design TIDA-01473. What is the difference between those two ?

A:  The TI design folder (TIDA-01473) is essentially the same thing as the DLPDLCR2000EVM. To be more specific, the TIDA-01473 is a formal design which implements the EVM's circuitry with full documentation. All schematics/layout files/BOM files are available for this TI design, which allow you to spin your own version of the EVM should you wish to do so.