DWIN DMT80600C080_01W Advertising Screen Development Guide User Guide

: September 20, 2024
: DWIN

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DWIN Advertising Screen Development Guide

1. Product Overview

1.1 Application Introduction

The DGUS advertising screen mainly consists of T5L ASIC and R11 video decoding module. The T5L ASIC is the main control chip, and the R11 video decoding module works together as a coprocessor.

Hardware interface diagram

1.2 Product Features

(1) Supports smooth decoding of MP4 videos, making it easy for DGUS screens to have video playback capabilities.
(2) Supports WIFI (2.4G, 5G) and 4G networking functions, enabling remote backend video file updates and setting of advertising video playback rules.
(3) Provide matched cloud management backend, divided into three levels of accounts: device supplier accounts can allocate devices to brand owner accounts; Brand owner accounts can manage videos (remote updates, set playback rules), create video groups, create and activate operators; Operator account can manage the videos.

2. Product Selection

2.1 Advertising Screen Selection Table

Model

| Size| Resolution| LCD Type| Touch Type| Color| Operating Temperature(°C)
---|---|---|---|---|---|---
DT321X190020Z240101C| 7.0| 800*480| TN| Capacitive touch| 24 bit,16.7M|

-20~70°C(12V)

DT321X190020Z240101D

| 8.0| 800600| TN| Capacitive touch| 24 bit,16.7M| -20~70°C(12V)
DT321X190020Z240101E| 10.1| 1024600| IPS| Capacitive touch| 24 bit,16.7M|

-20~70°C(12V)

DT321X190020Z240101H

| 15.6| 19201080| IPS| Capacitive touch| 24 bit,16.7M| -10~60°C(12V)
DT321X190020Z240101I| 18.5| 19201080| IPS| Capacitive touch| 24 bit,16.7M|

0~50°C(15V)

DT321X190020Z240101J

| 21.5| 1920*1080| IPS| Capacitive touch| 24 bit,16.7M|

0~50°C(15V)

3. System Variable Interface

The advertising screen can be controlled through the DGUS system variable interface (0x0600). By assigning different key values to the address, various functions of the advertising screen can be achieved. After DGUS processing, the key values will be automatically reset to zero.

3.1 System Variable Interface Definition

3.1.1 0x0600 System Variable Interface Function

Different key values of variable address 0x0600 can implement different playback functions, as shown in the following table.

VP address

| Key value| Functional classification| Description
---|---|---|---
0x0600| 0x0013| Video control|

Resume playback

0x0005

| Video control| Stop
0x000d| Video control|

Exit

0x0004

| Video control| Pause
0x000B| Volume control|

Volume up

0x000C

| Volume control| Volume down
0x000A| Volume control|

Mute

0x000F

| Volume control| Volume setting, requires address 0x0601
0x0021| Video playback selection|

Select the first one

0x0022

| Video playback selection| Select the second one
0x0023| Video playback selection|

Select the third one

0x0024

| Video playback selection| Select the fourth one
0x0025| Video playback selection|

Select the fifth one

0x0020

| Video list query| Query SD card playlist
0x002A| Video list query|

Query USB disk playlist

0x0002

| Video list query| Flip up playlist
0x0001| Video list query|

Flip down playlist

0x0026

| Video control| Full screen playback
0x0027| Video control|

Normal size playback

0x0029

| Video control| Rotate the video 90°clockwise
0x0036| Video control|

Do not loop playback

0x0037

| Video control| Single loop playback
0x0038| Video control|

All loop playback

3.1.2 Application Examples of Other System Variable Interface

The functions of other system variable interfaces on the advertising screen can refer to the table below.

VP address

| Description|

Note

---|---|---
0x0601|

Volume setting address

| Range: 0-40

0x0610

|

The first video in the list

| Occupying 32 bytes length

0x0620

|

The second video in the list

| Occupying 32 bytes length

0x0630

|

The third video in the list

| Occupying 32 bytes length

0x0640

|

The fourth video in the list

| Occupying 32 bytes length

0x0650

|

The fifth video in the list

| Occupying 32 bytes length

0x06D0

|

Volume query address

| Range: 0-40

0x06D1

|

Playback status query address

| 0: Playback preparation
1: Playing
2: Playback failed
3: Playback completed
4: Playback pause
5: Playback stop

0x06D2

|

Loop status query address

|

0x06D3

|

Automatic playback status query address

|

3.2 Application Instance

The system variable interface key value can be changed through the DGUS control’s “Return Key Code” function or by sending serial port commands.

3.2.1 DGUS Return Key Code

When creating a DGUS project, use the “Return Key Code” control and set the corresponding “key values”, such as playing, pausing, volume up and volume down.

Playing Pausing

Volume up Volume down

3.2.2 Serial Port Command

Send 82/83 protocol commands through the serial port, such as sending serial port commands to achieve full screen playback.

4. Serial Port Protocol

The advertising screen product has reserved two UARTs (UART 2 and UART 4). Among them, UART 2 defaults to using the DWIN 82/83 protocol, which can configure Baud Rate and CRC verification through CFG files. UART 4 allows users to analyze and formulate communication protocols according to their needs. The default format for UART 2 is 9600, 8N1, which means Baud Rate 9600, 8 data bits, no checksum bit, and 1 stop bit.

4.1 Communication Data Frame

Data block

| 1| 2| 3| 4| 5
---|---|---|---|---|---
Definition| Frame header| Data length| Command| Data|

CRC verification
(optional)

Data length

| 2| 1| 1| N| 2
Description| 0x5AA5| Including commands, data, and verification|

0x82/0x83

| |

Example
(without verification)

| 0x5AA5| 04| 83| 00 10 04|
Example
(with verification)| 0x5AA5| 06| 83| 00 10 04|

25 A3

4.2 Interface Instruction Description

Command

| Data| Description| Response
---|---|---|---

0x82

| Variable space first address (0x0000-0xFFFF)+written data| Write data to variable space at the specified address| None

0x83

| Variable space first address (0x0000-0xFFFF)+read data in word length (0x01-0x7D)| Read the specified length data from the address specified in the variable space| Variable space first address+variable data in word length+read variable data

4.3 Commands Instance

1. Stop playing

82 command: DWIN DMT80600C080_01W Advertising Screen Development Guide -
d1
Command meaning: 82 (write variable space)
Description: This command is used for the stop playback function of the advertising screen. After issuing the command, the advertising screen will immediately stop the currently playing advertising content.

2. Stop playing

83 command:
Command meaning: 83 (read variable space) DWIN DMT80600C080_01W Advertising
Screen Development Guide - d4
Description: This command is used to query the current looping status of the advertising screen. After issuing the command, the advertising screen will return the current playback status information. For example, when the return value is 01, it indicates that the advertising screen is in single loop playback mode.

5. Common Questions

1. After clicking on the control, the video list does not appear?

After powering on, the buzzer will emit a “beep” sound, indicating that the module has completed startup. At this time, functions such as video playback can be used normally.

2. How to connect to the WIFI network?

Method 1: Use Notepad to open the “wpa_supplicant. conf” file on the USB disk, fill in your written WIFI name (SSID) and password in the following format, save the file, and make sure to place it in the root directory of the USB disk. After the screen is powered on, the file parameters will be automatically read and WIFI configuration will be performed.

ctrl_interface=/etc/wifi/sockets
disable_scan_offload=1
update_config=1
network={
ssid=”WIFI name”
psk=”WIFI password”
}

Method 2: Manually search and connect to WIFI through the advertising screen interface, enter the WIFI password, and then connect to the network.

3. How to remotely update videos?

Remote video updates require customers to set up their own cloud platform first with the assistance of DWIN. The following is an example of using an internal testing platform to illustrate how to use this function:
When you get a new advertising screen, you need to notify the device supplier account to assign the device to your own account. There are three levels of account rating.

Device supplier: Each hardware model corresponds to one device supplier, so there is usually only one.
Brand owner: Can manage video playback, grouping, and can also create and activate operators.
Operator: Can only manage video playback. There are as many devices that can be managed as the higher-level brand owners.

After configuring WIFI and connecting the device to the cloud platform, the device ID will be notified to the device supplier account, and the device supplier account can assign the ID of this device.

(1) Log in to the brand owner account or operator account to control video playback.
Device grouping: Assign devices that need to play the same video to the same group.

Check the device ID on the left, and click the right arrow to assign the device to the specified group

(2) Advertising management: advertising item setting and remote video update.
The video playback is determined by the rules in the advertising items. After modifying the video settings, click on “Distribute” to distribute the modified video rules to the groups bound by the rules. If there is no grouping, there will be a prompt to select a grouping during distributing.
Note: The “Distribute” key is only effective after modifying the rules.

Rule Name
Play Settings after downloading
Rule settings, including download and detection

6. Revision Records

Version

| Revise Date| Content| Editor
---|---|---|---
1.0| 2024-06-18| First Edition|

Xu Ying

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