DLPU110B April   2021  – August 2022 DLPC6540

 

  1.   Programmer's Guide
  2.   Trademarks
  3. Scope
  4. References
  5. Acronyms
  6. System Boot
    1. 4.1 Data In flash
    2. 4.2 Bootloader Application
    3. 4.3 Main Application
    4. 4.4 Commands supported by Bootloader and Main Applications
    5. 4.5 Debug Terminal
    6. 4.6 HOST_IRQ/SYSTEM_BUSY
    7. 4.7 Heartbeat
    8. 4.8 Low-level Fault
  7. System Status
  8. Version
  9. Power Modes
  10. Display Modes
  11. Source Detection and Configuration
  12. 10Internal sources
    1. 10.1 Test Patterns (TPG)
    2. 10.2 Solid Field (SFG) Color
    3. 10.3 Curtain
  13. 11Display Formatting
  14. 12Image Processing
  15. 13Illumination Control
  16. 14Peripherals
    1. 14.1 GPIO
  17. 15Interface Protocol
    1. 15.1 Supported Interfaces
    2. 15.2 I2C Target
    3. 15.3 USB
  18. 16Command Protocol
    1. 16.1 Command Packet
    2. 16.2 Response Packet
    3. 16.3 Destination Details
    4. 16.4 Error Handling and Recovery
    5. 16.5 System Busy - I2C scenarios
      1. 16.5.1 GPIO implementation
      2. 16.5.2 Short Status response
    6. 16.6 Support for Variable Data Size
  19. 17Auto-Initilization Batch File
  20. 18Command Descriptions
  21. 19 System Commands
    1. 19.1  3D
    2. 19.2  Administrative
    3. 19.3  Autolock
    4. 19.4  Blending
    5. 19.5  Bootloader
    6. 19.6  Calibration
    7. 19.7  Debug Internal
    8. 19.8  Debug
    9. 19.9  General Operation
    10. 19.10 Illumination
    11. 19.11 Image Processing
    12. 19.12 Peripherals
    13. 19.13 Warping
    14. 19.14 Manual WPC
  22. 20Revision History

Support for Variable Data Size

For large data handling commands such as flash download and flash read, the user can allow some commands to support variable number of data bytes. To support this use case, the commands that require variable data size, is mandated to include length as part of the Command packet header. The Command Handler uses the given length to decode the received Command packet and execute correctly. Similar to the Command packet, the data in the Response packet may also be variable. The Command Handler includes length in the Response packet header for such commands.

The command protocol is designed to support commands up to a length of 65535 bytes (2-byte length field). However, due to memory limitations, the command handler implementation limits it to a maximum size of 512 bytes in a Command packet (this includes all bytes in the command like header, checksum etc.).