Name: NEC C751Q
Brand: NEC
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Mute

Volume Up

Volume Down

Exit

Enter

Stop Pause

Reverse/

Forward/

Play

Left Right

Down

Figure 3.4-3: Supported CEC buttons on the NEC IR Remote

Note: The Volume Up, Down and Mute buttons will control audio on the display rather than on any

media player software running on the Compute Module. These buttons will only operate in CEC mode

if a CEC compatible audio amp/receiver is used.

Introduction2
Contents3
- Table of Contents3
Revision History6
Basic Features7
GPIO Summary9
Requirements9
Operating System Programming Procedure9
1 Basic Setup and Configuration Steps10
2 Installing the Compute Module and NEC Compute Module Interface Board to the Display11
3 Connections and Internal Operation14
- USB Device Connections to the Compute Module14
- USB Connections for Programming the Compute Module15
- LAN Connections16
- Software Control Via IR Remote17
4 Preparation21
5 Operating System Summary22
6 Preparing and Running the Tools to Make the Compute Module Appear as a Mass Storage Device25
- Using a Windows PC as a Host25
- Using a Raspberry Pi 1, 2, or 3 as a Host28
7 Miscellaneous Configuration Items32
- Configuring the Correct HDMI Video Level Encoding and Decoding32
- To Disable Overscan (if Black Bars Are Visible on the Sides of the Screen)33
- To Rotate the Screen Image to Portrait Orientation34
- To Enable Support for the IR Remote Receiver Using "Lirc34
- To Test Support for the IR Receiver by Outputting Raw Data35
- Enabling the Serial Port (UART) to the Display and Allowing Application Access36
- Testing Internal Serial Communications to the Display Using the Python Based NEC PD SDK37
- Configuring the Compute Module to Shutdown Using Shutdown Signal from the Display38
- Creating an Image of the Compute Module to Backup or Clone39
- Reading and Setting the Display's Internal Real Time Clock (RTC) from the os39
- Using the Display's Watchdog Timer (WDT)39
- Controlling the Compute Module Cooling Fan41
- Controlling the Compute Module Power41
- Checking and Updating the Display Firmware Version41
8 Related OSD Settings43
- Compute Module Menu  Power  Power Supply43
- Compute Module Menu  Power  Auto Power on43
- Compute Module Menu  Service Menu  Setting Lock43
- Compute Module Menu  Service Menu  USB Boot Mode44
- Compute Module Menu  Service Menu  IR Signal44
- Compute Module Menu  Service Menu  Monitor Control44
- Compute Module Menu  Service Menu  Shutdown Signal45
- Compute Module Menu  Service Menu  Shutdown Signal  Power Supply off Delay45
- Compute Module Menu  Service Menu  WDT45
- Compute Module Menu  Service Menu  WDT  Start up Time46
- Compute Module Menu  Service Menu  WDT  Period Time46
- Control Menu  USB  External Control47
- Control Menu  USB  PC Source47
- Control Menu  USB  USB Power49
- Control Menu  CEC  CEC50
- Control Menu  CEC  Search Device50
- Expert Menu  Compute Module  CM Fan Power51
- Expert Menu  Compute Module  CM Auto Shutdown51
9 Useful Information and Commands53
- To Find out the IP Address of the Compute Module from a Terminal Window53
- To Restart from a Terminal Window53
- To Shutdown from a Terminal Window53
- To Run the Raspberry Pi Config Utility from a Terminal Window53
- To Change the Keyboard Layout to US from a Terminal Window53
- To Add and Remove Packages from Raspbian54
- To Update the Raspberry Pi54
- To Install the Python Serial Module55
- To Mount a USB Flash Drive from the Terminal55
- To Access an SMB (Windows Share) Drive from the Raspbian Desktop55
- To List Connected USB Devices55
- To Show Available Disk Space55
- To Show Internal Information about the Raspberry Pi56
- To Download a File to the Current Directory56
- To Find a File by Name56
- To Edit a Protected System Configuration File from the Raspbian Desktop56
- To Install a Minimal Windowing System on Jessie Lite56
- To Prevent the Screen Saver from Blanking the Screen after Several Minutes57
- To Enable IR Remote Control Using CEC from OSMC57
- To Enable IR Remote Control Using Lirc from OSMC57
- Monitoring the System Processes, CPU Usage, and Memory57
- To Enable and Disable Video Output from the Compute Module to the Display58
10 Troubleshooting59
11 Codec Licenses62
12 Python Based NEC PD SDK63
13 Compute Module Configuration Tool for Raspbian65
14 External Reference Information66
15 Frequently Asked Questions67
16 Known Issues70
17 Support71

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