DLP3010: 曝光配置问题

通过i2c配置dlp曝光在27张条纹序列。当dlp的曝光时间超过20000曝光值时，配置返回正确但是dlp没有投光。

ps:应该不是暗时间配置的问题，配置之前会通过命令读取按时间。

Jeremy_Wu：

仔细核对软件配置

Overview

These are the release notes for the following firmware image file:

Firmware Version: 8.0.1
Embedded Software Version: 8.1.0
Generated from DLP Composer Version: 13.13

DMD: DLP3010LC
Controller: DLPC3478
PMIC: DLPA2005

Configuration Settings

I2C Address: 0x36
DMD Pin Mapping: 1
Rlim value: 39mΩ
Light Control Sequence Database Version: 0.5.71

Supported Features

Light Control
Internal Pattern Streaming Mode: – Trigger-In/Free-running modes (Mono 1 Bit/8 Bit, RGB 1 Bit/8 Bit, Vertical + Horizontal Pattern Generation, Pattern Invert)
External Pattern Streaming Mode (Mono 1 Bit/8Bit, RGB 1 Bit/8Bit)
Zero dark time external pattern display for illumination time less than 400 uSec
Splash Patterns (Mono 1 Bit/ 8 Bit)

Display
External video input
IntelliBright video processing algorithms
Splash Screens
Source frame rates supported – 0 to 123 HZ
Four 2D looks (cool, medium, warm, and other) and one 3D look

Supported pattern timings in Sequence Database v0.5.71:

Internal Pattern Mode Timings:

Pattern Type
Sequence Index
Exposure Time Range (us)
Sequence Min Pre-Exposure Dark Time (us)
Sequence Min Post-Exposure Dark Time (us)

1-bit Monochrome
18
200 – 399
171
31

17
400 – 799
171
31

16
800 – 799
171
31

15
1800 – 3799
171
31

14
3800 – 7600
171
31

1-bit RGB
25
600 – 1799
171
31

24
1800 – 3799
171
31

23
3800 – 7600
171
31

8-bit Monochrome
20
3464 – 6928
171
31

21*
1677 – 3463
171
31

8-bit RGB
22
10912 – 21824
171
31

*Sequence 21 is a special sequence that displays 7-bit patterns. The least significant bit of the 8-bit pattern data will be ignored.

Notes:

For internal patterns, there will be an additional variable delay of ~3000 us at the beginning of every pattern set.
Exposure times shorter than the above values are not possible. Longer exposure times will operate with decreased timing accuracy and behavior is not guaranteed.
Shorter dark times are not possible. Longer dark times can be used. The maximum possible dark times for a desired exposure time are:

Tmax pre-exposure dark time  = ( 27306us + tsequence min pre-exposure dark time ) * (Tdesired exposure / tsequence minimum exposure)
Tmax post-exposure dark time = ( 27306us + tsequence min post-exposure dark time ) * (Tdesired exposure / tsequence minimum exposure)

External Pattern Streaming Timings:

Pattern Type
Sequence Index
Exposure Time Range (us)
Sequence Min Pre-Exposure Dark Time (us)
Sequence Min Post-Exposure Dark Time (us)

1-bit Monochrome
6
200 – 400
0*
0*

5
200 – 399
171
31

4
400 – 799
171
31

3
800 – 1799
171
31

2
1800 – 3799
171
31

1
3800 – 7600
171
31

1-bit RGB
11
451 – 799
171
31

10
800 – 1799
171
31

9
1800 – 3799
171
31

8
3800 – 7600
171
31

8-bit Monochrome
7
2555 – 5110
171
31

8-bit RGB
0
10912 – 21824
171
31

*Sequence 6 is a special sequence with zero pre-exposure and post-exposure dark times. (Note: While running this sequence, a dark time equivalent to the exposure time of one pattern will be added at the start of every pattern set.)

Notes:

Exposure times shorter than the above values are not possible. Longer exposure times will operate with decreased timing accuracy and behavior is not guaranteed.
Shorter dark times are not possible. Longer dark times can be used. The maximum possible dark times for a desired exposure time are:

Tmax pre-exposure dark time  = ( 6553us + tsequence min pre-exposure dark time ) * (Tdesired exposure / tsequence minimum exposure)
Tmax post-exposure dark time = ( 6553us + tsequence min post-exposure dark time ) * (Tdesired exposure / tsequence minimum exposure)

Splash Pattern Mode Timings:

Pattern Type
Sequence Index
Exposure Time Range (us)
Sequence Min Pre-Exposure Dark Time (us)
Sequence Min Post-Exposure Dark Time (us)

1 -bit Monochrome
13
793 – 1744
171
31

8-bit Monochrome
12
7737 – 17034
171
31

Notes:

The maximum pattern period (pre-exposure + exposure + post-exposure) cannot exceed 2184us for 1-bit splash patterns and 17476us for 8-bit splash patterns.

The listed minimum dark times are applicable for the minimum exposure time of each sequence. The dark times scale along with the exposure time as per the following equation:

Tmin required pre-exposure dark time  = tsequence min pre-exposure dark time * (Tdesired exposure / tsequence minimum exposure)
Tmin required post-exposure dark time = tsequence min post-exposure dark time * (Tdesired exposure / tsequence minimum exposure)

I2C command 0x9D (Read Validate Exposure Time) returns the minimum required pre-exposure and post-exposure dark times for a specific pattern type and given exposure time.