NEC显示器V404-V484-V554-P404-P484-P554系列串口控制协议说明市资源-CSDN文库

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NEC显示器V404-V484-V554-P404-P484-P554系列是专为商业和专业环境设计的一系列高级显示器，支持通过串口进行远程控制，以实现自动化设置和管理。这些显示器采用串行通信协议，包括RS-232C和LAN（局域网）控制接口，使得用户可以编程控制显示参数，如亮度、对比度、色彩等，而无需物理接触设备。 1. 应用这些显示器广泛应用于各种环境，包括办公室、零售店、展览厅和广告展示等，因为它们的串口控制功能使得远程管理和批量设置变得非常便捷。这种灵活性和可编程性降低了维护成本，提高了效率。 2. 准备工作在开始串口控制之前，需要完成以下准备工作： - 连接器和线路：确保正确连接RS-232C或LAN电缆，将显示器与控制设备（如嵌入式系统、单片机或基于STM32或ARM的微控制器）相连。对于RS-232C，注意信号线如TXD、RXD、GND的正确对应；对于LAN控制，需要使用RJ-45接口进行连接。 3. 通信规格 - RS-232C远程控制：遵循EIA/TIA-232标准，提供高达115,200波特的速率，用于点对点通信。数据格式通常包括起始位、8个数据位、奇偶校验位和停止位。 - LAN控制：使用TCP/IP协议栈，通过以太网实现多设备网络通信。这种方式提供了更远距离和更高的数据传输速率，但需要相应的网络配置。 4. 通信时序 - 通信时序规定了数据发送和接收的精确时间，以确保正确解码。这包括信号的上升时间、下降时间和间隔时间。 5. 通信格式 - 头部块格式（固定长度）：包含命令识别信息，确保消息被正确解析。 - 消息块格式：包含了实际的控制指令和可能的数据参数，如改变亮度的命令会携带新的亮度值。 6. 控制命令 - NEC显示器支持一系列控制命令，例如开关机、调整亮度和色温、切换输入源等。每个命令由特定的ASCII字符序列组成，必须按照通信格式发送。 7. 错误处理与确认 - 在通信过程中，可能会出现错误，如数据包丢失或校验错误。协议中应包含错误检测机制，如CRC校验，以及重传机制以确保命令的可靠执行。在嵌入式硬件或单片机项目中，利用这些串口控制协议可以实现自动化显示控制，比如在数字标牌系统中定时更换显示内容，或者根据环境光线自动调整亮度。熟悉这些协议的开发者可以编写相应的驱动程序或应用程序，方便地集成到自己的系统中，实现高效、智能的显示器管理。

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External Control NEC LCD Monitor

Rev.1.0 (G4)

INDEX

I. Application ............................................................................................................................................. 4

II. Preparation ........................................................................................................................................... 5

2. Connectors and wiring ......................................................................................................................... 5

2.1 RS-232C Remote control .................................................................................................................... 5

2.2 LAN control ......................................................................................................................................... 5

III. Communication specification ............................................................................................................ 7

3. Communication Parameter .................................................................................................................. 7

3.1 RS-232C Remote control .................................................................................................................... 7

3.2 LAN control ......................................................................................................................................... 7

3.3 Communication timing ....................................................................................................................... 7

4. Communication Format ........................................................................................................................ 8

4.1 Header block format (fixed length) ................................................................................................... 9

4.2 Message block format ...................................................................................................................... 11

4.3 Check code ....................................................................................................................................... 13

4.4 Delimiter ........................................................................................................................................... 14

5. Message type ...................................................................................................................................... 15

5.1 Get current Parameter from a monitor. .......................................................................................... 15

5.2 "Get parameter" reply ...................................................................................................................... 16

5.3 Set parameter ................................................................................................................................... 18

5.4 "Set parameter" reply ...................................................................................................................... 19

5.5 Commands ........................................................................................................................................ 20

5.5.1 Save Current Settings. .................................................................................................................. 20

5.5.2 Get Timing Report and Timing reply. ........................................................................................... 21

5.5.3 NULL Message ............................................................................................................................... 22

IV. Control Commands ........................................................................................................................... 23

6. Typical procedure example ............................................................................................................... 23

6.1. How to change the “Backlight” setting. ........................................................................................ 23

6.2. How to read the measurement value of the built-in temperature sensors. ................................. 26

6.3. Operation Code (OP code) Table .................................................................................................... 29

7. Power control procedure ................................................................................................................... 45

7.1 Power status read ............................................................................................................................ 45

7.2 Power control ................................................................................................................................... 47

8. Asset Data read and write ................................................................................................................. 49

8.1 Asset Data Read Request and reply................................................................................................ 49

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8.2 Asset Data write ............................................................................................................................... 50

9. Date & Time read and write............................................................................................................... 51

9.1 Date & Time Read ............................................................................................................................ 51

9.2 Date & Time Write ............................................................................................................................ 53

10. Self diagnosis ................................................................................................................................... 56

10.1 Self-diagnosis status read ............................................................................................................. 56

11. Serial No. & Model Name Read ....................................................................................................... 58

11.1 Serial No. Read ............................................................................................................................... 58

11.2 Model Name Read .......................................................................................................................... 60

12. Security Lock .................................................................................................................................... 62

12.1 Security Lock Control .................................................................................................................... 62

13. Direct TV Chanel Read & Write ....................................................................................................... 64

13.1 Direct TV Chanel Read & Reply ..................................................................................................... 64

13.2 Direct TV Chanel Write & Reply .................................................................................................... 65

14. Daylight Saving read & write ........................................................................................................... 66

14.1 Daylight Saving Read ..................................................................................................................... 66

14.2 Daylight Saving Write ..................................................................................................................... 68

15. Firmware Version ............................................................................................................................. 70

15.1 Firmware Version Read .................................................................................................................. 70

16. Auto ID .............................................................................................................................................. 72

16.1 Auto ID Execute.............................................................................................................................. 72

16.2 Auto ID Complete ........................................................................................................................... 73

16.3 Auto ID Reset .................................................................................................................................. 74

17. Input Name ....................................................................................................................................... 75

17.1 Input Name Read ............................................................................................................................ 75

17.2 Input Name Write ........................................................................................................................... 77

17.3 Input Name Reset ........................................................................................................................... 79

18. Auto Tile Matrix ................................................................................................................................ 80

18.1 Auto Tile Matrix Execute ............................................................................................................... 80

18.2 Auto Tile Matrix Complete ............................................................................................................. 82

18.3 Auto Tile Matrix Monitors Read ..................................................................................................... 83

18.4 Auto Tile Matrix Monitors Write .................................................................................................... 84

18.5 Auto Tile Matrix Reset ................................................................................................................... 85

19. Power Save Mode ............................................................................................................................. 86

19.1 Auto Power Save Time Read ......................................................................................................... 86

19.2 Auto Power Save Time Write ......................................................................................................... 87

19.3 Auto Standby Time Read ............................................................................................................... 88

19.4 Auto Standby Time Write ............................................................................................................... 89

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20. Setting Copy ..................................................................................................................................... 90

20.1 Setting Copy Read .......................................................................................................................... 90

20.2 Setting Copy Write ......................................................................................................................... 92

20.3 Setting Copy Start .......................................................................................................................... 94

21. Security Enable ................................................................................................................................ 95

21.1 Security Enable Read ..................................................................................................................... 95

21.2 Security Enable Write .................................................................................................................... 96

22. LAN MAC Address ............................................................................................................................ 98

22.1 LAN MAC Address Read ................................................................................................................. 98

23. Proof of Play.................................................................................................................................... 100

23.1 Set Proof of Play Operation Mode ............................................................................................... 100

23.2 Get Proof of Play Current ............................................................................................................. 102

23.3 Get Proof of Play Status ............................................................................................................... 105

23.4 Get Proof of Play Number to Number .......................................................................................... 107

24. Setting Lock of COMPUTE MODULE.............................................................................................. 109

24.1 Setting Lock Control .................................................................................................................... 109

25. Emergency Contents ...................................................................................................................... 111

25.1 Emergency Contents Display ....................................................................................................... 111

26.2 Emergency Contents Delete ........................................................................................................ 113