NEC V404-Mpi Raspberry Pi Compute Module Setup Guide

NEC V404-Mpi Manual

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  • NEC V404-Mpi | Raspberry Pi Compute Module Setup Guide - Page 1
    NEC Large-Screen Displays Raspberry Pi Compute Module Setup Guide Revision: 190405
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    models. Please see "Requirements" on page 9 for a current list of supported displays and Raspberry Pi hardware. Notes: 1. The acts of disclosure, duplication, and modification of part or whole contents in this reference manual without permission are prohibited. 2. The contents of this reference
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    are visible on the sides of the screen 35 8.3 To rotate the screen image to portrait orientation 36 8.4 To enable support for the IR Remote receiver using "lirc 36 8.5 To test support for the IR Receiver by outputting raw data 37 8.6 Enabling the serial port (UART) to the display and allowing
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    Menu  Shutdown Signal  Power Supply Off Delay...... 47 9.9 Compute Module menu  Service Menu  WDT 47 9.10 Compute Module menu  Service Menu  WDT  Start Up Time 48 9.11 Compute Module menu  Service Menu  WDT  Period Time 48 9.12 Control menu  USB  External Control 49 9.13 Control
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    the system processes, CPU usage, and memory 59 10.1.22 To enable and disable video output from the Compute Module to the display 60 11 Troubleshooting ...61 12 Codec Licenses...64 13 Python Based NEC PD SDK 65 14 Compute Module Configuration Tool for Raspbian 67 15 External reference information
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    in chapters 6, 7, 8 Update Requirements Add Wi-Fi FAQ Added to FAQs, Troubleshooting, and Support sections Added hyperlinks to OS distros in chapter 5 Add illustrations from final product guide Added to FAQs and Troubleshooting sections Updated OS distros Added chapter on Configuration Tool for
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    Compute Module. o A Python based SDK is available from NEC for easy software development. See Python Based NEC PD SDK on page 65. • Real Time Clock support via the display's internal clock o The display's internal Real Time Clock can be read and set via the Compute Module, using the internal serial
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    on whenever the Compute Module is powered. The fan operation can be controlled via the OSD or commands from the Compute Module.1 • Watchdog timer support o Can be used to reset a locked CPU by automatically restarting the Compute Module. A restart will occur if no periodic reset signal is received
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    GPIO Summary • GPIO 14 & 15 (UART0 TX & RX) - internal serial connection to the display • GPIO 18 - demodulated IR receiver from the display • GPIO 23 - shutdown signal (goes low to signal shutdown) Requirements • Compatible NEC display o C651Q o P404 o C751Q o P484 o C861Q o P554 o C981Q o P654Q
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    On newer releases of the NEC Edition Compute Module, a special bootloader is included on the system image, which can be used to replace the OS with an image file stored on a USB storage device. Look for the orange Yodeck logo during boot to see if this is included. See "Using the Yodeck bootloader
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    1 Basic Setup and Configuration Steps The following list shows the basic steps that will be performed: 1. Physically install the Raspberry Pi Compute Module and NEC Compute Module Interface board into the display. 2. Connect the host PC to the display via USB for programming the module. Connect
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    2 Installing the Compute Module and NEC Compute Module Interface Board to the Display 1. Disconnect AC power from the display. 2. Insert the Raspberry Pi Compute Module into the NEC Compute Module Interface board (1), make sure it is correctly seated and then press down on the compute module to lock
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    4. On the back of the display, unscrew the two screws on the interface board access cover and remove the cover. Figure 3.1-3: Remove the Interface Board Access Cover 5. Insert the edge connector on the interface board into the socket in the display and snap the board into place with the two
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    6. Place the vented access cover, included with the Compute Module interface board, on the back of the display and tighten the two screws. Figure 3.1-5: Place the Vented Access Cover 7. Reconnect AC power to the display. ©2019 NEC Display Solutions, Ltd. Page 14 of 74
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    3 Connections and Internal Operation 3.1 USB device connections to the Compute Module The inputs USB CM1 and USB CM2 on the display are for connecting downstream USB devices, such as a keyboard and mouse, additional storage, or a Wi-Fi adapter, to the Compute Module. The CM1 input is capable of
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    3.2 USB connections for programming the Compute Module To program the Compute Module, an external "host" PC is connected to the USB2 output and the display is placed into the special "USB Boot Mode" using the OSD. The Compute Module will then appear as a USB device to the "host" PC, allowing the
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    3.3 LAN connections The display has an internal 5 device LAN switch that connects the internal Display LAN Control system (including internal web server), internal Media Player, Raspberry Pi Compute Module, and the two external LAN connections for connecting to a network and other LAN devices. • The
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    the Compute Module as standard CEC commands. Only the NEC IR Remote can be used and CEC support must be enabled on the display and in the Operating System on the Compute Module. See Figure 3.4-3: Supported CEC buttons on the NEC IR Remote. The buttons used for CEC commands are dual-function
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    CEC ON / OFF IR SIGNAL ENABLE / DISABLE KT-RC2 (optional) Display CEC Control + HDMI IN1 Front IR Sensor USB Hub CEC Raspberry Pi Compute Compute Module Module Interface Board Figure 3.4-1: Using the NEC IR Remote with CEC ©2019 NEC Display Solutions, Ltd. Page 19 of 74
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    CEC ON / OFF IR SIGNAL ENABLE / DISABLE KT-RC2 (optional) Display CEC Control + HDMI IN1 Front IR Sensor USB Hub GPIO18 Raspberry Pi Compute Compute Module Module Interface Board Figure 3.4-2: Using other IR Remotes with raw IR signals ©2019 NEC Display Solutions, Ltd. Page 20 of 74
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    Reverse/ Play Forward/ Previous Next Up Left Right Down Volume Up Volume Down Stop Pause Enter Exit Mute 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
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    space to hold the OS image file and other tools. Refer to the following section and the Raspberry Pi website for a list of supported OSs: https://www.raspberrypi.org/downloads/ If using a Windows based host PC: 1. Download either the Etcher (recommended) or Win32DiskImager tool from the following
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    with Raspberry Pi Compute Module 3 NEC edition Needs HDMI pixel encoding changed Needs HDMI overscan setting change Includes lirc IR Remote support Serial port name Needs serial port configuration Python serial module Default username / password Confirmed with version Alternate tool for loading .img
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    Display" section change the "hdmi_pixel_encoding" setting to "RGB full". ††† Edit the file config.txt to add the line "dtoverlay=lirc-rpi" to enable IR support. On the "My OSMC" menu, select "Remote" and select "rc6-mce-lircd" type remote for a standard MCE type IR remote. ‡‡‡ Modify the file config
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    Note If there are different system build images available for various versions of Raspberry Pi, such as with LibreELEC and OSMC, be sure to select the correct build version for the version of the Raspberry Pi Compute Module being used. For example, if downloading LibreELEC for use with a Compute
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    6 Preparing and Running the Tools to Make the Compute Module Appear as a Mass Storage Device Follow the steps in the appropriate section below depending on the type of host system being used. 6.1 Using a Windows PC as a host 1. Download and install either the Etcher (recommended) or Win32DiskImager
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    f. Select SERVICE MENU. f g h i j g. Select SETTING LOCK and then select OFF. h. Enter the passcode. The default is 0 0 0 0. i. Select USB BOOT MODE and then select ENABLE. j. It is also
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    the device needs to be formatted before use - ignore this message as it will be formatted by imaging it. See the "Troubleshooting" section on page 61 of this guide if a new mass storage device doesn't appear. b. Run the Win32DiskImager tool and select the downloaded OS .img file. c. Select the new
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    in step 4 above): a. On the NEC display select the COMPUTE MODULE video input. b. Navigate to the COMPUTE MODULE menu on the OSD. c. Navigate to the SERVICE MENU item on the COMPUTE MODULE menu. d. If the USB BOOT MODE setting is still set to ENABLE change it to DISABLE. e. Navigate to the
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    cd Desktop Clone the usbboot tool repository: git clone --depth=1 https://github.com/raspberrypi/usbboot.git cd usbboot 4. Install libusb using the following command: sudo apt-get install libusb-1.0-0-dev 5. Now build and install the usbboot tool: make sudo make install Run the usbboot tool and it
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    f. Select SERVICE MENU. f g h i j g. Select SETTING LOCK and then select OFF. h. Enter the passcode. The default is 0 0 0 0. i. Select USB BOOT MODE and then select ENABLE. j. It is also
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    in step 6 above): a. On the NEC display select the COMPUTE MODULE video input. b. Navigate to the COMPUTE MODULE menu on the OSD. c. Navigate to the SERVICE MENU item on the COMPUTE MODULE menu. d. If the USB BOOT MODE setting is still set to ENABLE change it to DISABLE. e. Navigate to the
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    any user intervention. An image file name starting with "RaspberryPi" causes a selection to be shown on the boot screen, the image can then be manually selected using a USB keyboard. If there are no matching image files found by the bootloader, the normal boot process will continue in a few seconds
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    8 Miscellaneous Configuration Items Note: Many of the options for the Raspbian OS can be automatically configured using the Compute Module Configuration Tool for Raspbian see "Compute Module Configuration Tool for Raspbian" on page 67. 8.1 Configuring the correct HDMI video level encoding and
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    • EXPAND - Use EXPAND if the Compute Module is configured to output "limited" video in the range 16-235. The display will expand the video from the range 16-235 to 0-255 internally. The video range used by the Compute Module depends on the Operating System. By default and depending on the OS, many
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    .txt file: sudo nano /boot/config.txt Add a new line: display_rotate=3 Save the file and reboot. 8.4 To enable support for the IR Remote receiver using "lirc" 1. Make sure the display support is enabled. a. On the NEC display select the COMPUTE MODULE video input. ©2019 NEC Display Solutions, Ltd
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    the OSD. b c d c. Select SERVICE MENU. d. Confirm that the IR SIGNAL is set to ENABLE. e. If not set, then: i. Select SETTING LOCK and then select OFF. ii. Enter the passcode. The default is 0 0 0 0. iii. Select IR SIGNAL and select ON. 2. Edit the config.txt file to enable support for lirc: sudo
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    (UART) to the display and allowing application access 1. Make sure the display support is enabled. a. On the NEC display select the COMPUTE MODULE video input Navigate to the COMPUTE MODULE menu on the OSD. b c d c. Select SERVICE MENU. d. Confirm the MONITOR CONTROL is set to ENABLE. e. If not set,
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    3. Edit the config.txt file to allow application access to the serial port: sudo nano /boot/config.txt Edit to either add or change so there is a line with "enable_uart=1" If using the Compute Module 3 add the following two lines: dtoverlay=uart1 core_freq=250 Save the file by pressing CONTROL+o
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    it to the /etc/rc.local file on the system. See the instructions provided in the sample file for more details. To enable the Shutdown Signal On the NEC display navigate to the COMPUTE MODULE menu on the OSD. 1 2. Select SERVICE MENU. 2 3 4 3. Confirm that the SHUTDOWN SIGNAL is set to ENABLE. If not
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    8.9 Creating an image of the Compute Module to backup or clone Follow the steps to connect to a Windows host PC and place the Compute Module into USB BOOT MODE. Run the Win32DiskImager software and instead of selecting Write, select Read to read the drive and store as an .img file. Note: Because the
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    Compute Module will be able to send the periodic reset command to the display, even under heavy load conditions. The Python SDK includes support for sending the Watchdog Timer reset commands to the display, as well as configuring the timer settings. See the example file reset_display_wdt.py included
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    . The example file reset_display_wdt.py included in the SDK has support for thermal control based on the temperature of the Compute Module be set to turn on automatically when the display power is turned on, manually via the OSD, or manually via a command to the display. See sections 8.1 and 8.2 for
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    .com/dl/en/dp_soft/pd_fm_update/index.html Firmware can be updated via either a USB flash drive or the HTTP server in the display. See the instructions located at the above location for details. ©2019 NEC Display Solutions, Ltd. Page 44 of 74
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    turned on. If set to Disable, power to the Compute Module is manually controlled via either the POWER SUPPLY setting on the COMPUTE MODULE OSD menu 117Ch). 9.3 Compute Module menu  Service Menu  Setting Lock Available options: On / Off Access to other items on the SERVICE MENU is protected by a 4
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    external IR sensor, to the Compute Module via GPIO 18. See section 0 for more details on using this feature. 9.6 Compute Module menu  Service Menu  Monitor Control Available options: Enable / Disable Enables or disables the internal serial connection between the display and Compute Module. If set
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    that a monitoring utility must be installed to watch the GPIO 23 shutdown signal and shut down the operating system accordingly. 9.8 Compute Module menu  Service Menu  Shutdown Signal  Power Supply Off Delay For use only when the Shutdown Signal is set to Enable. This sets the time delay after
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    9.10 Compute Module menu  Service Menu  WDT  Start Up Time For use only when the WDT Compute Module, and for the periodic reset commands to begin sending to the display. 9.11 Compute Module menu  Service Menu  WDT  Period Time For use only when the WDT is set to Enable.4 This sets the maximum
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    9.12 Control menu  USB  External Control Available options: Enable / Disable Enables or Disables monitor control via USB. Software such as NEC SpectraView and MultiProfiler use the USB connection to the display for communications. This connection is shared between the External PC, Internal PC (OPS
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    Shared between the Compute Module, Internal PC (OPS), and External PC. Controlled by the "PC SOURCE" setting in "Control" -> "USB" on the OSD menu. Dedicated to the Compute Module MONITOR CONTROL ENABLE / DISABLE PC SOURCE C MODULE Display USB Control Internal PC (OPS) Internal Touchscreen
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    Shared between the Compute Module, Internal PC (OPS), and External PC. Controlled by the "PC SOURCE" setting in "Control" -> "USB" on the OSD menu. External PC input MONITOR CONTROL ENABLE / DISABLE PC SOURCE EXTERNAL PC Display USB Control Internal PC (OPS) Internal Touchscreen connection (
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    9.15 Control menu  CEC  CEC Available options: On / Off Enables and disables the CEC (Consumer Electronics Control) function between the display and the Compute Module, in order to control CEC enabled software via the display's IR Remote Control.5 See section 0 for more details on using this
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    9.17 Expert menu  Compute Module  CM Fan Power Available options: Auto / On / Off Selects the operating mode of the Compute Module cooling fan. • Auto (Default) - The display automatically turns the cooling fan on and off when the Compute Module is powered on and off. • Off - Immediately turns the
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    ©2019 NEC Display Solutions, Ltd. Page 54 of 74
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    10 Useful Information and Commands 10.1.1 To find out the IP address of the Compute Module from a terminal window Use the following command from a terminal window: hostname -I Or ifconfig 10.1.2 To restart from a terminal window Use the following command: sudo reboot 10.1.3 To shutdown from a
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    : It may take several seconds for the list to appear. Select: English (US) Enter Enter Select: Finish Or • Edit the keyboard configuration file manually sudo nano /etc/default/keyboard Change the following line XKBLAYOUT="gb" to XKBLAYOUT="us" 10.1.6 To add and remove packages from Raspbian To add
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    10.1.8 To install the Python serial module To install the Python serial module necessary for internal communications with the display. From Raspbian use: sudo apt-get install python-serial 10.1.9 To mount a USB flash drive from the terminal Example: sudo mkdir /media/usbstick sudo mount -t vfat -o
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    10.1.13 To show internal information about the Raspberry Pi From Raspbian use the following to list all available commands: vcgencmd commands Examples: Show the internal temperature: vcgencmd measure_temp Show configurations that have been set: vcgencmd get_config int Information about the
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     Input  Peripherals  CEC Adapter Enable the setting. A restart may be required before the CEC device can be detected by the display. Use the supported CEC buttons on the NEC IR Remote. See Figure 3.4-3. See sections 0, 8.15 and 8.16 for more information. Note: Information as of OSMC version
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    10.1.22 To enable and disable video output from the Compute Module to the display The internal HDMI video signal from the Compute Module to the display can be disabled and enabled using the following commands. This can be useful for example to cause the display to enter standby mode or switch to
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    11 Troubleshooting Problem: the Compute Module. Problem: Compute Module hangs at the rainbow screen Solutions: • The imaged OS may not include support for the Compute Problem: Black borders appear around the screen image Solution: • Overscan needs to be disabled. Follow the previous instructions
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    party remote. • Use lirc debugging mode to view the raw IR sensor output. • CEC support may be enabled. Normally CEC support must be disabled in order for lirc to work correctly. Problem: Serial communications with the display not functioning Solutions: • Confirm the OSD COMPUTE MODULE setting for
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    Flashing the Compute Module fails after a couple of minutes. Solution: • Confirm the OSD COMPUTE MODULE setting for WDT (Watchdog Timer) is set to DISABLE. Problem: Video playback is slow or jerky Solutions: • The default of 64 MB for video may not be enough for full-screen video. Try allocating at
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    . The licenses are programmed into the processor during production. It is not necessary to purchase license keys. All Compute Modules include hardware codec support for MPEG-4. For the standard Compute Module 1 and 3, license keys for the MPEG-2 and VC-1 codecs can be purchased from Raspberry Pi and
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    number o Temperature and fan statuses o Diagnostic information o Operating hours o LAN IP and MAC addresses This makes it very easy to integrate support for remote diagnostics and asset management into any software running on the Compute Module. • Reading and writing almost any configuration setting
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    or sudo -H pip install nec_pd_sdk It can also be downloaded or cloned from the repository on GitHub: https://github.com/NECDisplaySolutions/necpdsdk Example files are included in the repository. These examples are not included in the package installer. ©2019 NEC Display Solutions, Ltd. Page 66 of
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    showing how to use the SDK APIs to communicate with the host display. • Downloading and installing a Python file that provides System Shutdown support by monitoring GPIO 23 - set low by the display to signal a shutdown. • Downloading and installing a Python file that provides hardware based Watchdog
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    https://github.com/NECDisplaySolutions/nec_rpi_config_tool ©2019 NEC Display Solutions, Ltd. Page 68 of 74
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    15 External reference information Main Raspberry Pi website: https://www.raspberrypi.org/ Wikipedia page with listing of other supported operating systems: https://en.wikipedia.org/wiki/Raspberry_Pi#Operating_systems Another listing of Raspberry Pi based operating system distributions: http://elinux
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    other software or Operating Systems are not provided by NEC. See Python Based NEC PD SDK on page 65. Does the Compute Module 3 provide any support for Wi-Fi or Bluetooth? All included network connectivity is via the LAN connections on the display. Wi-Fi and Bluetooth connectivity can be added
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    Compute Module version of the Raspberry Pi. NEC currently recommends using the OPS Android DRD Digital Signage Player instead. Does the NEC Compute Module provide support for Wi-Fi or Bluetooth? No. However, a universal USB dongle such as the one on the Raspberry Pi site can be connected to the USB
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    CM Auto Shutdown in section 8.18 Are the NEC displays compatible with the new Compute Module CM3+? The 8, 16, and 32 GB eMMC versions are supported. Are the NEC displays compatible with the Compute Module Lite? No. The CM Lite requires SD card
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    interface and OpCode 117Ch is not working correctly in firmware prior to R1.006E on the Pxx4 and Vxx4/-T displays. • CEC (Consumer Electronics Control) support between the display and Raspberry Pi Compute Module requires at least firmware R1.006E on the Pxx4 and Vxx4/-T displays. • Watchdog Timer
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    OS, and the Compute Module, it is recommended to visit the support forums at the Raspberry Pi Foundation: https://www.raspberrypi.org/forums/ Compute Module together with a supported NEC display model are available here: http://www.necdisplay.com/support-and-services/raspberry-pi/ The latest display
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NEC Large-Screen Displays
Raspberry Pi Compute Module
Setup Guide
Revision: 190405