DLPU100A May   2020  – April 2024 DLP3021-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Purpose and Scope
  5. 2FPGA Pin Configuration and Functions
    1. 2.1 DMD Interface
    2. 2.2 Light Control
    3. 2.3 Communication
    4. 2.4 Support
    5. 2.5 FPGA Dedicated Pins
    6. 2.6 Power and Ground
    7. 2.7 Unused Pins
  6. 3Specifications
    1. 3.1 Recommended Operating Conditions
    2. 3.2 FPGA Power Consumption
    3. 3.3 Host SPI Interface Timing
    4. 3.4 Power Supply and Reset Timing
      1. 3.4.1 Power-Up Timing
      2. 3.4.2 Power-Down Timing
      3. 3.4.3 Brownout Detection
    5. 3.5 DMD Interface Timing
    6. 3.6 Flash Memory Interface Timing
    7. 3.7 Reference Clock Timing
    8. 3.8 I2C Interface Timing
  7. 4Feature Descriptions
    1. 4.1 Video Control
      1. 4.1.1 Video Options
      2. 4.1.2 Example 1: Display a Static Image
      3. 4.1.3 Example 2: Display 1 Video Repeatedly
      4. 4.1.4 Example 3: Display Two Videos Then Stop
      5. 4.1.5 Example 4: Display a Video Once and Then Display an Image Forever
      6. 4.1.6 Example 5: Display 3+ Videos/Images Seamlessly
    2. 4.2 Temperature Measurements
    3. 4.3 PWM Outputs
    4. 4.4 Host IRQ Interrupt Signal
    5. 4.5 Video and Image Compression
  8. 5Layout
  9. 6Host Command Protocol
    1. 6.1 SPI Specifications
    2. 6.2 SPI Write Command
    3. 6.3 SPI Read Command
  10. 7FPGA Register Definitions
  11. 8Revision History

4.1 Video Control

The FPGA is capable of reading video data from external flash memory and displaying it on the DMD. The video data must be converted and compressed by the DLP Composer tool before it is stored in flash memory. When the flash binary is generated, DLP Composer will specify the address locations of the video content within memory.

There are two sets of registers for two video configurations. This allows a seamless transition between two videos if desired. More than two videos can also be displayed seamlessly, but intervention is required from a host controller during playback to do so. One configuration can be modified while the other configuration is playing. A configuration is latched in when the video configuration begins playing. Interrupt signals can be used to notify a host controller when one configuration completes so that its values can be modified to another desired video while the next configuration plays.

During operation, the following registers can be used to configure the FPGA to display video content from flash memory:

  • Video Frame Rate
  • Video Start Address 1
  • Video Configuration 1
  • Video Start Address 2
  • Video Configuration 2
  • Video Control
  • Video Status

The steps to display video are:

  • Write Video Frame Rate – Set frame rate to match the DMD sequence.
  • Write Start Address X – Set start address of the desired video in flash.
  • Write Configuration X – Set number of frames in the video, and number of times to loop the video.
  • (Optional) Write Start Address Y – Set start address of the second desired video in flash.
  • (Optional) Write Configuration Y – Set number of frames in the next video, and number of times to loop the video.
  • Write Video Control – Select playback options, and play video.