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DLPC3438
Programmer's Manual
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Texas Instruments DLPC3430, DLPC3432, DLPC3433, DLPC3435, DLPC3438 Programmer's Manual

DLPC3430, DLPC3432, DLPC3433, DLPC3435 and DLPC3438 Software

Programmer's Guide
Literature Number: DLPU020C
July 2014–Revised May 2018
Contents
1 Trademarks......................................................................................................................... 7
2 Introduction......................................................................................................................... 7
2.1 Software Programmer’s Guide Overview ............................................................................. 7
3 Interface Specification .......................................................................................................... 8
3.1 I
4 System Initialization ............................................................................................................. 8
4.1 Boot ROM Concept ...................................................................................................... 8
4.2 Resident Boot Software ................................................................................................. 8
4.3 HOST_IRQ Initialization Sequence .................................................................................... 8
5 Software Interface ................................................................................................................ 9
5.1 I
Revision History.......................................................................................................................... 68
2
C Interface and Ports for DLPC343x................................................................................. 8
2
C Considerations ....................................................................................................... 9
2

Table of Contents

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1 DLPC343x Embedded Configuration...................................................................................... 7
2 HOST_IRQ Timing Diagram................................................................................................ 9
3 Write Parameters........................................................................................................... 11
4 Return Parameters......................................................................................................... 15
5 Byte 1 Write Parameter.................................................................................................... 17
6 Byte 2 Write Parameter.................................................................................................... 17
7 Example of Solid Field Test Pattern (Red).............................................................................. 19
8 Example of Fixed Step Horizontal Ramp Test Pattern................................................................ 20
9 Example of Fixed Step Vertical Ramp Test Pattern ................................................................... 20
10 Example of Horizontal Lines Test Pattern .............................................................................. 21
11 Example of Vertical Lines Test Pattern.................................................................................. 21
12 Example of Diagonal Lines Test Pattern................................................................................ 22
13 Example of Grid Lines Test Pattern ..................................................................................... 23
14 Example of Checkerboard Test Pattern................................................................................. 23
15 Example of Color Bars Test Pattern..................................................................................... 24
16 Return Parameters......................................................................................................... 24
17 Cropping Rules when Crop Size exceeds Input Size ................................................................. 28
18 Write Parameters........................................................................................................... 30
19 Rotation and Non-Rotation of Portrait Source.......................................................................... 31
20 Long-Axis Flip............................................................................................................... 31
21 Short-Axis Flip .............................................................................................................. 31
22 Return Parameters......................................................................................................... 32
23 Write Parameters........................................................................................................... 32
24 Return Parameters......................................................................................................... 33
25 Write Parameters........................................................................................................... 34
26 Return Parameters......................................................................................................... 35
27 Write Parameters........................................................................................................... 36
28 Byte 1 Return Parameters ................................................................................................ 37
29 Byte 2 Return Parameters ................................................................................................ 37
30 Bit Weight and Bit Order for Duty Cycle Data.......................................................................... 38
31 Maximum Number of Sequence Vectors................................................................................ 38
32 Return Parameters......................................................................................................... 39
33 Write Parameters........................................................................................................... 42
34 Return Parameters......................................................................................................... 43
35 Write Parameters........................................................................................................... 43
36 Return Parameters......................................................................................................... 44
37 Byte 1 Return Parameters ................................................................................................ 48
38 Return Parameters......................................................................................................... 49
39 Byte 1 Return Parameters ................................................................................................ 49
40 Bit Weight Definition for LABB Gain Value ............................................................................. 49
41 Byte 1 Write Parameters .................................................................................................. 50
42 Bit Weight Definition for the CAIC Maximum Gain Value............................................................. 50
43 Bit Weight Definition for the CAIC Clipping Threshold Value......................................................... 50
44 Bit Weight Definition for the CAIC RGB Intensity Gain Values....................................................... 51
45 Byte 1 Return Parameters ................................................................................................ 52
46 Write Parameters........................................................................................................... 52
47 Return Parameters......................................................................................................... 53
List of Figures
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List of Figures
3
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48 Byte 1 Write Parameters .................................................................................................. 53
49 Bit Weight Definition for the Optical Throw Ratio Data................................................................ 54
50 Visual Definition and Calculation for Optical Throw Ratio Data...................................................... 54
51 Bit Weight Definition for the Optical DMD Offset Data ................................................................ 54
52 Method for Calculation for Optical DMD Offset Data .................................................................. 55
53 Sign Determination for Optical DMD Offset Data ...................................................................... 55
54 Examples of Non-Inverted and Inverted Projector Orientations...................................................... 56
55 Byte 1 Return Parameters ................................................................................................ 57
56 Write Parameters........................................................................................................... 57
57 Pillar-Box Border Example ................................................................................................ 58
58 Return Parameters......................................................................................................... 58
59 Bit Weight Definition for the Projection Pitch Angle Data............................................................. 59
60 Examples of Projection Pitch Angle...................................................................................... 60
61 Byte 1 Return Parameters ................................................................................................ 61
62 Byte 1 Return Parameters ................................................................................................ 62
63 Byte 2 Return Parameters ................................................................................................ 62
64 Byte 3 Return Parameters ................................................................................................ 63
65 Byte 4 Return Parameters ................................................................................................ 63
66 Byte 1 Read Parameters.................................................................................................. 64
67 Byte 5 Return Parameters ................................................................................................ 65
68 Byte 6 Return Parameters ................................................................................................ 66
69 Return Parameters......................................................................................................... 66
70 Read Parameters........................................................................................................... 67
4
List of Figures
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1 I
2 Supported TI Generic Commands ....................................................................................... 10
3 Source Specific Associated Commands ................................................................................ 13
4 Common Commands ...................................................................................................... 14
5 Write Parameters........................................................................................................... 15
6 Return Parameters......................................................................................................... 16
7 Write Parameters........................................................................................................... 16
8 Foreground and Background Color Use ................................................................................ 18
9 Descriptions and Bit Assignments for Parameters 1-4 ................................................................ 18
10 Number of Bytes Required based on Pattern Selection .............................................................. 19
11 Parameter Bytes............................................................................................................ 24
12 Write Parameters........................................................................................................... 25
13 Return Parameters......................................................................................................... 26
14 Read Parameters........................................................................................................... 26
15 Return Parameters......................................................................................................... 26
16 Splash Screen Header Definitions ....................................................................................... 27
17 Write Parameters........................................................................................................... 27
18 Scaling Limits ............................................................................................................... 28
19 Return Parameters......................................................................................................... 28
20 Write Parameters........................................................................................................... 29
21 Return Parameters......................................................................................................... 30
22 Partial List of Commands that May Benefit from the Use of Image Freeze ........................................ 34
23 Splash Screen Example Using Image Freeze ......................................................................... 35
24 Test Pattern Generator Example Using Image Freeze................................................................ 35
25 Return Parameters......................................................................................................... 36
26 Return Parameters......................................................................................................... 37
27 Write Parameters........................................................................................................... 39
28 Write Parameters........................................................................................................... 40
29 Input Source Limits for Active Data ...................................................................................... 40
30 Return Parameters......................................................................................................... 41
31 Available Commands Based on LED Control Method................................................................. 42
32 Write Parameters........................................................................................................... 44
33 Return Parameters......................................................................................................... 45
34 Return Parameters......................................................................................................... 45
35 Write Parameters........................................................................................................... 46
36 Return Parameters......................................................................................................... 46
37 Return Parameters......................................................................................................... 47
38 Write Parameters........................................................................................................... 48
39 Write Parameters........................................................................................................... 49
40 LABB and CAIC Modes ................................................................................................... 51
41 Return Parameters......................................................................................................... 51
42 Write Parameters........................................................................................................... 53
43 Return Parameters......................................................................................................... 56
44 Write Parameters........................................................................................................... 59
45 Return Parameters......................................................................................................... 60
46 Return Parameters......................................................................................................... 61
47 Return Parameters......................................................................................................... 62
List of Tables
2
C Write and Read Transactions.......................................................................................... 9
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48 Return Parameters......................................................................................................... 64
49 Read Parameters........................................................................................................... 64
50 Return Parameters......................................................................................................... 65
51 Controller Device ID Decode ............................................................................................. 66
52 DMD Device ID Reference Table ........................................................................................ 67
53 Return Parameters......................................................................................................... 67
6
List of Tables
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...
LED_SEL(2)
DC Supplies
BAT
+
±
1.1 V
WVGA
DDR DMD
DLP2010
(WVGA
DMD)
RESETZ
Included in DLP® Chip Set
CMP_PWM
1.8 V
PROJ_ON
PROJ_ON
2.3 to 5.5 V
CMP_OUT
Projector Module Electronics
INTZ
DLPA200x
PARKZ
1.1 V
1.8 V
VCORE
VIO
Illumination
Optics
3
BIAS, RST, OFS
Thermistor
LABB
I2C
28
Parallel I/F
HOST_IRQ
VCC_INTF
4
EEPROM
DLPC343x
VCC_FLSH
SPI_1
I2C_1
L3
SYSPWR
1.8 V
1.8 V
Other
Supplies
1.1-V Reg
Sub-LVDS DATA
CTRL
Cal data
(optional)
FLASH, SDRAM
Keypad
Front-End
Chip
- OSD
- AutoLock
- Scaler
- Microcontroller
HDMI
Receiver
Triple
ADC
Charger
DC_IN
VDD
On/Off
HDMI
VGA
SD Card
Reader, and
so forth
(optional)
FLASH
L1
L2
VLED
BLUE
GREEN
RED
Current
Sense
Spare R/W
GPIO
18
TVP5151
Video
Decoder
CVBS
BT.656
Keystone
Sensor
WPC
GPIO_8 (Normal Park)
1.8 V VSPI
4 SPI_0
eDRAM
DLPC3430, DLPC3432, DLPC3435, DLPC3433, and
DLPC3438 Software Programmer’s Guide

1 Trademarks

LightCrafter is a trademark of Texas Instruments.

2 Introduction

2.1 Software Programmer’s Guide Overview

This guide details the software interface requirements for a DLPC343x ASIC-based system. It defines all applicable communication protocols including I2C initialization, default settings and timing. The DLPC343x system can be used in Figure 1.
Programmer's Guide
DLPU020C–July 2014–Revised May 2018
Figure 1. DLPC343x Embedded Configuration
2.1.1 I2C-Based Command Data Interface
The legacy interface configurations make use of an I2C interface for commands and a 24-bit parallel interface.
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Interface Specification

3 Interface Specification

The protocol used in communicating information to DLPC343x consist of a serial data bus conforming to the Philips I2C specification, up to 100 kHz. MIPI DSI is supported in DLPC343x, but this feature is not supported in LightCrafter™ Display EVM.

3.1 I2C Interface and Ports for DLPC343x

DLPC343x commands are executed using I2C and support two I2C ports, port-0 and port-1. Port-0 is primarily used for command and control interface. While using this port, DLPC343x behaves as
an I2C slave.

4 System Initialization

This section describes the methodology used for system initialization.

4.1 Boot ROM Concept

The DLPC343x employs a boot ROM and associated boot software. This resident boot code consists of the minimum code necessary to complete the program loading. For most DLPC343x product configurations, an external flash device can store the main application code, along with the other configuration and operational data required by the system for normal operation.

4.2 Resident Boot Software

The resident boot code consists of the minimum code necessary to load the ARM software from flash to internal RAM for execution.
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4.3 HOST_IRQ Initialization Sequence

HOST_IRQ is a signal indicating the status of DLPC343x initialization. While reset is applied, HOST_IRQ resets to tri-state (an external pullup pulls the line high). HOST_IRQ remains tri-state (pulled high externally) until the microprocessor boot completes. While the signal is pulled high, the controller performs boot-up and auto-initialization.
Immediately after boot-up, the microprocessor drives HOST_IRQ to a logic high state to indicate that the controller is performing auto-initialization (no real state change occurs on the external signal). Upon completion of auto-initialization, ARM software sets HOST_IRQ to a logic low state to indicate the completion of auto-initialization. At the falling edge, the system is said to enter the INIT_DONE state.
After auto-initialization completes, HOST_IRQ generates a logic high interrupt pulse to the host through software control; this interrupt indicates that the controller detects an error condition or requires service.
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RESETZ
500 ms max
I2C access to DLPC343x should not start until HOST_IRQ goes low (this should occur within 500 ms from the release of RESETZ.
HOST_IRQ
(with External Pullup)
0 ms min
(INIT_BUSY)
(ERR IRQ)
3 µs min
An active-high pulse on HOST_IRQ following the initialization period will indicate an error condition has been detected. The source of the error is reported in the system status.
The first falling edge of HOST_IRQ indicates auto-initialization done.
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5 Software Interface

There is generally one set of software commands supported by the DLPC343x controller.
Software Interface
Figure 2. HOST_IRQ Timing Diagram

5.1 I2C Considerations

5.1.1 I2C Transactions
5.1.1.1 Data Flow Control
5.1.2 List of System Write/Read Software Commands
Since all I2C commands are processed by software, only one type of I2C transaction is supported. This transaction type is shown in Table 1 for both writes and reads. The I2C interface supports variably-sized transactions for example, a one byte transaction, a nine byte transaction) to match the TI commands discussed later in this document.
Table 1. I2C Write and Read Transactions
Transaction Address
Write
Read Request
Read Response
(1)
The address corresponds to the chip address of the controller.
(2)
The subaddress will correspond to a TI command.
(3)
The data (if present) will correspond to any required command parameters.
36h (or 3Ah) Command value Parameter values
36h (or 3Ah) Command value Parameter values
37h (or 3Bh) Parameter values
(1)
8-bits 8-bits 8-bit parameter bytes (0 → N)
8-bits 8-bits 8-bit parameter bytes (0 → N)
8-bits 8-bit parameter bytes (0 → N)
Sub-Address
While the I2C interface inherently supports flow control by holding the clock, this is not sufficient for all transactions (for example, sequence and CMT updates). In this case, the host software should use the
(2)
Remaining Data Bytes
Read Short status to determine if the system is busy.
The commands supported by the I2C interfaces are discussed in the following sections.
(3)
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Command Type Command Description Reset Value OpCode (hex) Default Action Section
General Operation
Write Write Input Source Select 1 05 Test pattern Section 5.1.3.1
Write Write Write Test Pattern Select 7000h 0B White solid field Section 5.1.3.5
Write Write Splash Screen Select 0D User-specified Section 5.1.3.7
Write Write Image Crop
Write Write Display Size DMD Res 12 Section 5.1.3.12
Write Write Display Image Orientation 14 User-specified Section 5.1.3.14
Write Write Display Image Curtain 1 16 Black Section 5.1.3.16
Write Write Image Freeze 0 1A No freeze Section 5.1.3.18
Write Write LOOK Select 22 User-specified Section 5.1.3.20
Write Write Execute Batch File 0 2D Section 5.1.3.24 Write Write External Input Image Size DMD Res 2E Section 5.1.3.25
Write Write Splash Screen Execute 35 Section 5.1.3.27
Illumination Control
Write
Write Write RGB LED Enable 7h 52 Enabled Section 5.1.3.30
Write Write RGB LED Current 54 User-specified Section 5.1.3.32
Write Write RGB LED Max Current 5C User-specified Section 5.1.3.35
Image Processing Control
Write
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Table 2. Supported TI Generic Commands
Read Read Input Source Select 06 Section 5.1.3.2
Write External Video Source Format Select
Read Read Test Pattern Select 0C Section 5.1.3.6
Read Read Splash Screen Select 0E Section 5.1.3.8 Read Read Splash Screen Header 0F Section 5.1.3.9
Read Read Image Crop 11 Section 5.1.3.11
Read Read Display Size 13 Section 5.1.3.13
Read Read Display Image Orientation 15 Section 5.1.3.15
Read Read Display Image Curtain 17 Section 5.1.3.17
Read Read Image Freeze 1B Section 5.1.3.19
Read Read LOOK Select 23 Section 5.1.3.21
Read Sequence Header
Read
Attributes Read DMD Sequencer Sync
Read
Mode
Read Read External Input Image Size 2F Section 5.1.3.26
Write LED Output Control Method
Read LED Output Control
Read
Method
Read Read RGB LED Enable 53 Section 5.1.3.31
Read Read RGB LED Current 55 Section 5.1.3.33
Read CAIC LED Max Available
Read
Power
Read Read RGB LED Max Current 5D Section 5.1.3.36 Read Read CAIC RGB LED Current 5F Section 5.1.3.37
Write Local Area Brightness Boost Control
Read Local Area Brightness
Read
Boost Control
43h 07 RGB888 Section 5.1.3.3
ffffffff000000
00h
1 80
10 No crop Section 5.1.3.10
26 Section 5.1.3.22
2C Section 5.1.3.23
50 User-specified Section 5.1.3.28
51 Section 5.1.3.29
57 Section 5.1.3.34
Manual strength
control
81 Section 5.1.3.39
Section 5.1.3.38
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General Setup
Administrative Commands
Software Interface
Table 2. Supported TI Generic Commands (continued)
Command Type Command Description Reset Value OpCode (hex) Default Action Section
Write
Write Write CCA Control 1 86 Enabled Section 5.1.3.42
Write
Write Write Border Color 0 B2 Black Section 5.1.3.46
Write
Write CAIC Image Processing Control
Read CAIC Image Processing
Read
Control
Read Read CCA Control 87 Section 5.1.3.43
Write Keystone Correction Control
Read Keystone Correction
Read
Control
Read Read Border Color B3 Section 5.1.3.47
Write Keystone Projection Pitch Angle
Read Keystone Projection Pitch
Read
Angle
Read Read Short Status D0 Section 5.1.3.50 Read Read System Status D1 Section 5.1.3.51 Read Read System Software Version D2 Section 5.1.3.52 Read Read Communication Status D3 Section 5.1.3.53 Read Read Controller Device ID D4 Section 5.1.3.54 Read Read DMD Device ID D5 Section 5.1.3.55 Read Read Flash Build Version D9 Section 5.1.3.56
0 88 Disabled Section 5.1.3.44
0 BB 0 Pitch angle Section 5.1.3.48
84 User-specified Section 5.1.3.40
85 Section 5.1.3.41
89 Section 5.1.3.45
BC Section 5.1.3.49
5.1.3 System Write/Read Commands
5.1.3.1 Write Input Source Select (05h)
5.1.3.1.1 Write
This command selects the image input source for the display module.
5.1.3.1.2 Write Parameters
Figure 3 describes the command parameters.
Figure 3. Write Parameters
MSB Byte 1 LSB
b7 b6 b5 b4 b3 b2 b1 b0
b(7:2)
Reserved
b(1:0) Input Source:
• 0h: External Video Port
• 1h: Test Pattern Generator
• 2h: Splash Screen
• 3h: Reserved
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Default: 01h
NOTE: When selecting the external video port, there is a set of associated commands applicable
These associations are also shown in Table 3.
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only to this source selection. These associated commands are the Write External Input image Size and the Write External Video Source Format Select.
When selecting the test pattern generator, only one associated command is applicable to this source selection. This associated command is the Write Test Pattern Select command.
When selecting the splash screen, only two associated commands are applicable to this source selection. These associated commands are the Write Splash Screen Select and Write splash Screen Execute commands.
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Software Interface
Table 3. Source Specific Associated Commands
Source Specific Associated Commands
Write External Video Source Format Select Only N/A N/A Write External Input Image Size Only N/A N/A Write Test Pattern Select N/A Only N/A Write Splash Screen Select N/A N/A Only Write Splash Screen Execute N/A N/A Special
(1)
The Write Splash Screen Execute command is special in that there is no maintained state or history. Thus this command has no settings to be stored and reused by the system.
External Video Port Test Pattern Generator Splash Screen
Input Source Select Options
These commands (other than Write Splash Screen Execute) describe the characteristics of their associated source, and once these settings are defined the system stores them. Afterwards, each time an input source selection is made (using the Write Input Source Select command), the system remembers the settings described by the commands associated with the selected source, and automatically applies them. The user only needs to send these associated commands when the source is first defined, or when the source characteristics for that port must be changed. The appropriate associated commands must be updated when source characteristics change.
The user can send source-associated commands every time they make an input source selection. The source associated commands should be sent prior to sending the Write Input Source Select command. When source-associated commands are sent when that source is not active, the controller software saves the new settings, but does not execute these commands. When that source becomes active (via the Write Input Source Select command), the controller applies these new settings, as in the following example:
1. The user sends the following commands (active input source = test pattern generator):
• Write image Freeze = freeze
• Write External Video Source Format Select (settings stored, command not executed)
• Write External Input Image Size (settings stored, command not executed)
• Write Input Source Select = external port (see step 2 below)
• Write Image Freeze = unfreeze
2. When the Write Input Source Select command is received, the software applies the settings from these external video port-associated commands:
• External Video Source Format Select
• External input Image Size
If source-associated commands are sent for a source that is already active, the controller software executes these commands when received, as in the following example:
• The user sends the following commands (active input source = external video port): – Write Image Freeze = freeze – Write external Video Source Format Select (command executed) – Write Image Freeze = unfreeze
The rest of the commands that apply to image setup have settings applicable across all source selections, and typically remain the same across the three input source selections. A few examples are Write Display Size and Write Display Image Orientation. A representative list of these commands is shown in Table 4.
(1)
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Table 4. Common Commands
Common Commands
Write Image Crop Common Common Common Write Display Image Size Common Common Common Write Keystone Correction Control Common Common Common Write Display Image Orientation Common Common Common Write Display Image Curtain Common Common Common Write Look Select Common Common Common Write Local Area Brightness Boost Control Common Common Common Write CAIC Image Processing Control Common Common Common
External Video Port Test Pattern Generator Splash Screen
Input Source Select Options
While the values for these commands may be the same across the different input source types, the hardware settings may change (for example: display image size = 1080p = DMD size – the external port input source size is WXGA, which is scaled up to the display size of 1080p. If the user changes to the TPG Input Source, the size of the test pattern must match the size of the DMD. Therefore, the scaler settings must to be changed). The controller software manages the underlying hardware settings. This also applies to those commands which specify automatic operation. While the automatic setting remains the same, the underlying algorithm might change its settings based on the characteristic of the selected source.
NOTE: The user is required to specify the active data size for all external input sources, using the
Write Input Image Size command.
NOTE: When a test pattern is selected, it is generated at the resolution of the DMD, modified by the
settings specified by the Write Image Crop command, and displayed at the resolution specified by the Write Display Size command.
NOTE: The user should see the Write Image Freeze command for information on hiding on-screen
artifacts when selecting an input source.
5.1.3.2 Read Input Source Select (06h)
5.1.3.2.1 Read
This command reads the state of the image input source for the display module.
5.1.3.2.2 Read Parameters
This command has no command parameters.
5.1.3.2.3 Return Parameters
Figure 4 describes the return parameters.
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Figure 4. Return Parameters
MSB Byte 1 LSB
b7 b6 b5 b4 b3 b2 b1 b0
Software Interface
b(7:2)
Reserved
b(1:0) Input source
• 0h: External video port
• 1h: Test Pattern generator
• 2h: Splash screen
• 3h: Reserved
5.1.3.3 Write External Video Source Format Select (07h)
5.1.3.3.1 Write
This command specifies the active external video port and the source data type for the display module.
5.1.3.3.2 Write Parameters
Table 5 describes the command parameters.
Table 5. Write Parameters
CMD Parameter Port Bits/Pixel Data Type
40h Parallel 16 RGB 565 16 1 Auto-select RGB CSC 41h Parallel 18 RGB 666 18 1 Auto-select RGB CSC 42h Parallel 24 RGB 888 8 3 Auto-select RGB CSC 43h Parallel 24 RGB 888 24 1 Auto-select RGB CSC 50h Parallel 18 YCbCr 666 18 1 Auto-select YCbCr CSC 51h Parallel 24 YCbCr 888 24 1 Auto-select YCbCr CSC
60h Parallel 16 YCbCr 4:2:2 88 8 2
61h Parallel 16 YCbCr 4:2:2 88 16 1
Bus
Width
Clks/Pix
el
Notes
Auto-select YCbCr CSC Auto-select 4:2:2 → 4:4:4
Auto-select YCbCr CSC Auto-select 4:2:2 → 4:4:4
Default: 43h This command is used in conjunction with the Write Input Source Select command. This command
specifies which input port displays when the Write Input Source Select command selects external video port as the image source. The settings for this command are retained until changed using this command. These settings are automatically applied each time the external video port is selected.
When the external video port is selected as the input source, the software automatically selects and loads the proper CSC, based on the selected parameter of this command (appropriate matrix for RGB, selected matrix for YCbCr including offset).The appropriate data path is also automatically selected for 4:2:2 versus 4:4:4 processing.
The selection of video source port is independent from the selected command port. The user should review the notes for the Write Input Source Select command to understand the concept
of source-associated commands. This concept determines when source-associated commands are executed by the system. This command is a source-associated command.
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5.1.3.4 Read External Video Source Format Select (08h)
5.1.3.4.1 Read
This command reads the state of the active external video port and the source data type for the display module.
5.1.3.4.2 Read Parameters
This command has no read parameters.
5.1.3.4.3 Return Parameters
Table 6 describes the return parameters.
Table 6. Return Parameters
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CMD
Parameter
40h Parallel 16 RGB 565 16 1 Auto-select RGB CSC 41h Parallel 18 RGB 666 18 1 Auto-select RGB CSC 42h Parallel 24 RGB 888 8 3 Auto-select RGB CSC 43h Parallel 24 RGB 888 24 1 Auto-select RGB CSC 50h Parallel 18 YCbCr 666 18 1 Auto-select YCbCr CSC 51h Parallel 24 YCbCr 888 24 1 Auto-select YCbCr CSC
60h Parallel 16 YCbCr 4:2:2 88 8 2
61h Parallel 16 YCbCr 4:2:2 88 16 1
Port Bits/Pixel Data Type
5.1.3.5 Write Test Pattern Select (0Bh)
5.1.3.5.1 Write
This command specifies an internal test pattern for display on the display module.
5.1.3.5.2 Write Parameters
Table 7 describes the command parameters.
Bus
Width
Table 7. Write Parameters
Clks/Pix
el
Notes
Auto-select YCbCr CSC Auto-select 4:2:2 → 4:4:4
Auto-select YCbCr CSC Auto-select 4:2:2 → 4:4:4
16
Parameter Bytes Description
Byte 1 TPG pattern select Byte 2 Foreground and background color (see Table 8) Byte 3 Parameter 1 (see Table 9) Byte 4 Parameter 2 (see Table 9) Byte 5 Parameter 3 (see Table 9) Byte 6 Parameter 4 (see Table 9)
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Figure 5. Byte 1 Write Parameter
MSB Byte 1 LSB
b7 b6 b5 b4 b3 b2 b1 b0
Software Interface
b(7)
Test pattern border:
• 00h: Disabled
• 01h: Enabled b(6:4) Reserved b(3:0) Left pattern select:
• 00h: Solid field
• 01h: Fixed step horizontal ramp
• 02h: Fixed step vertical ramp
• 03h: Horizontal lines
• 04h: Diagonal lines
• 05h: Vertical lines
• 06h: Horizontal and vertical grid
• 07h: Checkerboard
• 08h: Color bars
• 09h-0Fh: Reserved
Byte 1 default: 00h
Figure 6. Byte 2 Write Parameter
MSB Byte 2 LSB
b7 b6 b5 b4 b3 b2 b1 b0
b(7)
Reserved
b(6:4) Foreground color:
• 0h: Black
• 1h: Red
• 2h: Green
• 3h: Blue
• 4h: Cyan
• 5h: Magenta
• 6h: Yellow
• 7h: White b(3:0) Reserved b(2:0) Background color:
• 0h: Black
• 1h: Red
• 2h: Green
• 3h: Blue
• 4h: Cyan
• 5h: Magenta
• 6h: Yellow
• 7h: White
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Table 8. Foreground and Background Color Use
Pattern
Solid field Yes No Fixed step horizontal ramp Yes No Fixed step vertical ramp Yes No Horizontal lines Yes Yes Vertical lines Yes Yes Diagonal lines Yes Yes Grid lines Yes Yes Checkerboard Yes Yes Color bars No No
Foreground Color Background Color
Byte 2
Byte 2 default: 70h
Table 9. Descriptions and Bit Assignments for Parameters 1-4
Pattern
Solid field N/A N/A N/A N/A Fixed step
horizontal ramp Fixed step
vertical ramp Horizontal lines N/A N/A
Vertical lines N/A N/A Diagonal lines N/A N/A Vertical spacing 8 Horizontal spacing 8
Grid lines
Checkerboard Color bars N/A N/A N/A N/A
Byte 6 (Parameter 4) Byte 5 (Parameter 3) Byte 4 (Parameter 2) Byte 3 (Parameter 1)
Description Bits Description Bits Description Bits Description Bits
N/A N/A End value 8 Start value 8
N/A N/A End value 8 Start value 8
Vertical
background line
width
Number of vertical
checkers
Vertical foreground
8
3
line width
Number of vertical
checkers
Background line
Background line
8
8
Horizontal
background line
Number of
horizontal checkers
width
width
width
8 Foreground line width 8
8 Foreground line width 8
Horizontal foreground
8
3
line width
Number of horizontal
checkers
8
8
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This command is used in conjunction with the Write Input Source Select command. This command specifies which test pattern displays when the Write Input Source Select command selects test pattern generator as the image source. The settings for this command are retained until changed using this command. These settings automatically apply each time the test pattern generator is selected.
Batch files are created and stored in flash, and recall the settings for predefined test patterns. Test patterns are created at the resolution of the display (DMD), are modified by the Write Image Crop
command, and displayed at the resolution specified by the Write Display Size command. Test patterns display at the default frame rate 60 Hz. The Test Pattern Border Selection creates a white border, a single pixel wide and tall, around the specified
test pattern. The user must review the notes for the Write Input Source Select command to understand the concept of
source-associated commands. This concept determines when source-associated commands are executed by the system. This command is a source-associated command.
When a foreground or background color is not used, the bit values are ignored (see Table 8). If both foreground and background color are not used, or when a parameter byte (bytes 3 thru 6) is not used, the byte should not be sent. Table 10 shows the number of bytes required, based on the specified pattern.
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As noted in Table 8, the color for the solid field pattern is specified using the foreground color. An example of a solid field pattern is shown in Figure 7.
Software Interface
Table 10. Number of Bytes Required based on Pattern Selection
Specified Pattern Number of Bytes Required
Solid field 2
Fixed step horizontal ramp 4
Fixed step vertical ramp 4
Horizontal lines 4
Vertical lines 4
Diagonal lines 4
Grid lines 6
Checkerboard 7
Color bars 1
Figure 7. Example of Solid Field Test Pattern (Red)
As noted in Table 8, the color for the fixed step horizontal ramp pattern is specified using the foreground color. As noted in Table 9, the user specifies the start value and the stop value for the ramp. For this pattern, the system automatically determines the step size based on the start and stop values and the size of the display (DMD). The minimum start value is 0, the maximum stop value is 255, and the start value must always be smaller than the stop value. For example, if the start value = 0, the stop value = 255, and the DMD resolution is 1280 wide, the step size would be 5 (1280 pixels / 256 values = 5). Thus every gray shade value from 0 to 255 would have a step size of 5 pixels (such that each step would have 5 columns of pixels with the same gray scale value). The gray scale value always increments by 1 for each step between the start and stop values. An example of a fixed step horizontal ramp pattern is shown in
Figure 8.
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Software Interface
As noted in Table 8, the color for the fixed step vertical ramp pattern is specified using the foreground color. As noted in Table 9, the user specifies the start value and the stop value for the ramp. For this pattern, the system automatically determines the step size based on the start and stop values and the size of the display (DMD). The minimum start value = 0, the maximum stop value = 255, and the start value must always be smaller than the stop value. For example, if the start value = 0, the stop value = 255, and the DMD resolution is 768 tall, then the step size would be 3 (768 pixels / 256 values = 3). Thus every value from 0 to 255 would have a step size of 3 pixels (such that each step would have 3 rows of pixels with the same gray scale value). The gray scale value always increments by 1 for each step between the start and stop values. An example of a fixed step vertical ramp pattern is shown in Figure 9.
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Figure 8. Example of Fixed Step Horizontal Ramp Test Pattern
20
Figure 9. Example of Fixed Step Vertical Ramp Test Pattern
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As noted in Table 8, the colors for the horizontal lines pattern are specified using both the foreground and background colors. The foreground color is used for the horizontal lines, and the background color is used for the space between the lines. As noted in Table 9, the user specifies the foreground line width, as well as the background line width. The user must determine the line spacing for each resolution display. For example, if the foreground line width = 1, and the background line width = 9, there would be a single pixel horizontal line on every tenth line. An example of a horizontal lines pattern is shown in Figure 10.
Software Interface
Figure 10. Example of Horizontal Lines Test Pattern
As noted in Table 8, the colors for the vertical lines pattern are specified using both the foreground and background colors. The foreground color is used for the vertical lines, and the background color is used for the space between the lines. As noted in Table 9, the user specifies the foreground line width, as well as the background line width. The user must determine the line spacing for each resolution display. For example, if the foreground line width = 1, and the background line width = 9, there would be a single pixel vertical line on every tenth line. An example of a vertical lines pattern is shown in Figure 11.
Figure 11. Example of Vertical Lines Test Pattern
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HORZSPACING
VERTSPACING
Software Interface
As noted in Table 8, the colors for the diagonal lines pattern are specified using both the foreground and background colors. The foreground color is used for the diagonal lines, and the background color is used for the space between the lines. As noted in Table 9, the user specifies the horizontal and vertical line spacing. The line width is always one pixel. The user determines the line spacing for each resolution display. Both horizontal and vertical line spacing must use the same value, and are limited to values of 3, 7, 15, 31, 63, 127, and 255. Invalid values result in a communication error (invalid command parameter). An example of a diagonal lines pattern is shown in Figure 12.
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Figure 12. Example of Diagonal Lines Test Pattern
As noted in Table 8, the colors for the grid lines pattern are specified using both the foreground and background colors. The foreground color is used for the grid lines, and the background color is used for the space between the lines. As noted in Table 9, the user specifies the horizontal foreground and background line width, as well as the vertical foreground and background line width. The user determines the line spacing for each resolution display. For example, if the horizontal foreground line width = 1, and background line width = 9, there would be a single pixel horizontal line on every tenth line. If the vertical foreground line width = 1, and background line width = 9, there would be a single pixel vertical line on every tenth line. An example of a grid lines pattern is shown in Figure 13.
22
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