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21F075P90 E1 Linux User Guide

1. 2 2 4 Configuring the Kernel The default kernel configuration does not include all the drivers and components necessary for F75P The following section describes which drivers are needed for the F75P IOP and CPs iral iral Make sure the ncurses library is installed on the host system as it is needed for menuconfig You can install ncurses using the following command apt get install libncurses5 dev Start the Linux Kernel Configuration menu in the kernel source directory make menuconfig Enable the following drivers marked bold EXT3 Support Filesystems gt Ext3 journalling file system support devtmpFS support Device Drivers gt Generic Driver Options gt Maintain a devtmpfs filesystem to mount at dev I2C Support for Intel Atom and EG20T Chipset Device Drivers gt 12 Support gt I2C device Interface 12C Hardware Bus support gt Intel SCH SMBus 1 98 Intel EG20T PCH LAPIS Semicon IOH I2C M GPIO Support Device Drivers gt GPIO Support gt Intel SCH TunnelCreek Centeron GPIO Intel EG20T PCH LAPIS Semiconductor IOH GPIO sys class gpio sysfs interface RTC Support Device Drivers gt Real Time Clock gt Epson RX 8581 EG20T DMA Support Device Drivers gt DMA Engine support gt Intel EG20T PCH LAPIS Semicon IOH DMA NFS Server Client Support File systems gt Network File Systems gt NFS server sup
2. Time Clock RTC The system RTC is connected to I2C Bus 0 device address 0x32 and will be instantiated manually by the etc rc local script described in Chapter 2 3 11 Instantiating the System RTC on page 27 There is a native Linux tool named hwclock to access this device using device node dev rtcl which will be created by the RX8581 RTC driver Reading the RTC Time hwclock r f dev rtcl Setting the RTC Time hwclock set date 07 29 2014 17 10 10 f dev rtcl localtime Setting the RTC Time to System Time Please note that the RTC additionally implemented in the F75P is considered the system RTC The real time clocks integrated in each Intel Atom E6xx processor are not automatically synchronized with the system RTC The IOP s processor clock may be used by standard software modules The hwclock tool provides one way of synchronizing the F75P system RTC and processor RTCs hwclock hctosys f dev rtcl For more information on the RTC implementation on F75P please refer to the F75P User Manual Chapter 3 7 Real Time Clock RTC MEN Mikro Elektronik GmbH 33 21F075P90 E1 2014 10 13 Using F75P Functions under Linux 3 3 Board Management Controller BMC There is a tool named smb2 bmc to access the board management controller This provides access e g to the event log You can find the source code of this tool in the MDIS directory that was created during the installation of Linux as describe
3. Yaghmour Jon Masters Gilad Ben Yossef Philippe Gerum 2008 O Reilly Media ISBN 978 0 596 52968 0 Programming Embedded Linux Michael Opdenacker Oron Peled 2006 Codefidence Ltd Free download www scribd com doc 3009867 Programming Embedded Linux Linux Kernel Configuration Linux Kernel in a Nutshell Greg Kroah Hartman 2007 O Reilly Media ISBN 978 0 596 10079 7 Free download www kroah com kn Linux Device Drivers Linux Device Drivers 3rd Edition Jonathan Corbet Alessandro Rubini Greg Kroah Hartman 2005 O Reilly Media ISBN 0 596 00590 3 Free download http Iwn net Kernel LDD3 Linux Kernel Development 2nd Edition Robert Love 2005 Novell Press MEN Mikro Elektronik GmbH 21F075P90 E1 2014 10 13 Appendix 5 1 6 Linux System Programming E e Linux System Programming Robert Love 2007 O Reilly Media ISBN 978 0 596 00958 8 Advanced Linux Programming Mark Mitchell Jeffrey Oldham Alex Samuel 2001 New Riders Publishing ISBN 0 7357 1043 0 Free download www advancedlinuxprogramming com alp folder 5 1 7 General Linux in a Nutshell 5th Edition Ellen Siever Aaron Weber Stephen Figgins Robert Love Arnold Robbins 2005 O Reilly Media ISBN 978 0 596 00930 4 Linux from Scratch Gerard Beekmans 2008 Free download www linuxfromscratch org C MEN Mikro Elektronik GmbH 41 21F075P90 E1 2014 10 13
4. compile drivers make install MODS INSTALL DIR mnt lib modules kernelversion misc install drivers to the target disc Mi Change the root to your destination partition and update the modules chroot mnt depmod a lt kernelversion gt M The device node for the MDIS device will not be created automatically Add the device node creation to etc rc local mknod dev mdis c 248 0 M Add the MEN MDIS kernel modules to etc modules so that the modules will be loaded on system boot ZMEN Chameleon en lx chameleon Frodo UART Driver en Ix frodo MEN SMB Driver en 1l smb2 MEN Mikro Elektronik GmbH 24 21F075P90 E1 2014 10 13 Installing Linux 2 3 4 Creating initrd The IOP initrd must include the 167087 ETH F75P Ethernet driver to be able to load the driver at system start up A Please make sure that the chroot is on mnt M Add the following modules to the configuration located in file etc initramfs tools modules men lx chameleon men Ix z 7 f75p mode 100FD 100FD AUTO AUTO AUTO AUTO phyadr 1 1 1 1 1 1 M Navigate to folder boot and create initrd mkinitramfs o existing initrd filename lt kernelversion gt 2 3 5 Configuring the Network You need to configure static IP addresses for the interfaces from the IOP to CP1 and CP2 MI Add the following lines for eth0 interface to CP1 and eth interface to CP2 in etc network interfaces Interface to CPl auto ethO if
5. version of the modules issue many debug messages using printk s for trouble shooting nodbg Do not include debug strings Run at full speed dbg Include debug strings Modules run slower Next gt Cancel MEN Mikro Elektronik GmbH 18 21F075P90 E1 2014 10 13 Installing Linux MI Select the target partition mounted on mnt to install the binaries e g tools libraries MDIS descriptors and the MDIS device to imi mdiswiz Installation directory for user state applications The directory in which the user state programs are to be installed Often something like usr local bin relative to the target s root tree mnt usr local bin Browse lt Back Cancel Installation directory for static user mode libraries The directory in which the static user mode libraries are to be installed Often something like usr local lib on development host For cross compilation select a path relative to your cross compilers lib directory mnt usr loca I lib Browse lt Back Cancel mdiswiz The directory in which the MDIS descriptors are to be installed Often something like etc mdis Relative to the targets root tree mnt etc mdis Browse lt Back Cancel MEN Mikro Elektronik GmbH 21F075P90 E1 2014 10 13 Installing Linux mdiswiz The directory in which the MDIS device nodes are to be installed Often something like dev Relative to
6. 21F075P90 E1 2014 10 13 Installing Linux on the F75P F75P 3U CompactPCI PluslO Safe Railway Computer Aen About this Document About this Document This user guide is intended only for system developers and integrators it is not intended for end users It deals with the installation of Linux on the F75P I O Processor IOP and Control Processors CP1 and CP2 The document also describes a demo application for F75P that is available for download on MEN s website This user guide is not intended to be used for safety critical applications You can find all Safety Related Application Conditions in the F75P user manual In any case we strongly recommend that you make yourself familiar with the F75P architecture before you start working with software ED If you do not have access to the F75P user manual yet please contact E MEN for more information History Issue Comments Date E1 First issue 2014 10 13 MEN Mikro Elektronik GmbH 2 21F075P90 E1 2014 10 13 About this Document Conventions Indicates important information or warnings concerning proper functionality of the product described in this document The globe icon indicates a hyperlink that links directly to the Internet b 2j where the latest updated information is available When no globe icon is present the hyperlink links to specific elements and information within this document i
7. CP1 subnet 192 168 2 0 netmask 255 255 255 0 1 range 192 168 2 10 192 168 2 15 interface eth0 filename pxelinux 0 DHCP for CP2 subnet 192 168 3 0 netmask 255 255 255 0 interface ethl filename pxelinux 0 range 192 168 3 10 192 168 3 15 2 3 9 Installing an NFS Server V Install an NFS Network File System server apt get install nfs kernel server Now you have to export the root file systems for each of the CPs The root file system will be copied later to the path defined in the exports MI Create the etc exports file if it does not exist M Add the following lines in etc exports var lib tftpboot CPX cplroot rw no all squash no root squash var lib tftpboot CPX cp2root rw no all squash no root squash MEN Mikro Elektronik GmbH 26 21F075P90 E1 2014 10 13 Installing Linux 2 3 10 Additional Modules Loading on Boot Additional modules must be loaded on boot to provide I2C access M Add the following modules to etc modules i2c dev i2c eg20t 2 3 11 Instantiating the System RTC The RTC device cannot enumerate through the kernel and must be initiated manually M Add the following line to etc rc local to add the RTC device on Bus 0 address 0x32 echo rx8581 0x32 sys bus i2c devices i2c 0 new device 2 4 Configuring CP1 and CP2 In this example configuration some of the following steps are done only for CP1 The respective files are later duplicated and or adapted
8. DIS Wizard You can find details about the MDIS wizard in the MDIS5 under Linux Qi User Manual available on the MEN website M Navigate to opt menlinux BIN and start the MDIS Configuration Wizard mdiswiz The following dialog will open Welcome to the MDIS Configuration Wizard This tool allows you to configure MDIS devices easily To generate an initial config scan system klick Cancel and use button scan from the toolbar Please choose your initial action e ject Open existing project cancel M Click OK to create a new MDIS project MEN Mikro Elektronik GmbH 16 21F075P90 E1 2014 10 13 o mstaling Linux MI Create a new selfhosted project Select the development environment You need to select the development environment so that MDIS modules are compiled with the correct tool chain Selfhosted The development host is the same your target system Uses the GNU compiler too c ELinOS Cross compilation with SYSGO s embe Linux distribution C Other other environment ELDK etc Back Cancel M Select a directory where to install the project to e g create the project in the home directory of the development system mdiswiz Select the project directory to store MDIS configurati This directory is used to store the configuration that you configure with mdiswiz The modules and binaries will be compiled into this directory
9. FICALLY EXCLUDED ARE ANY IMPLIED WARRANTIES ARISING BY OPERATION OF LAW CUSTOM OR USAGE INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE OR USE In no event shall MEN be liable for more than the contract price for the products in question If buyer does not notify MEN in writing within the foregoing warranty period MEN shall have no liability or obligation to buyer hereunder The publication is provided on the terms and understanding that 1 MEN is not responsible for the results of any actions taken on the basis of information in the publication nor for any error in or omission from the publication and 2 MEN is not engaged in rendering technical or other advice or services MEN expressly disclaims all and any liability and responsibility to any person whether a reader of the publication or not in respect of anything and of the consequences of anything done or omitted to be done by any such person in reliance whether wholly or partially on the whole or any part of the contents of the publication Conditions for Use Field of Application The correct function of MEN products in mission critical and life critical applications is limited to the environmental specification given for each product in the technical user manual The correct function of MEN products under extended environmental conditions is limited to the individual requirement specification and subsequent validation
10. PCI Slot 0 MEN CHAMELE Container device for cl pup ooo RR gt I Beady ee mi MEN Mikro Elektronik GmbH 21 21F075P90 E1 2014 10 13 Installing Linux The next step will be to add the SMB driver controller to the CPU M Right click on cpu gt Properties and navigate to SMBus to activate the onboard SMB controller Project Build Edit Packages Help pee w PG z PCI Slot 0 Properties of cpu Location General SMBus SMBus Settings Apply Cancel V Press OK to add the driver and leave the default settings After that a new device named smb2 1 will appear in the MDIS Wizard Ready MDIS Wizard home andy MDIS F75P Project Build Edit Packages Help 0 6 2 Amarna Functionality See cpu MEN F115 CompactPCI Intel Ator fismb2_1 Local Bus MEN SMBPCI S Pseudo device for Linu ffifpga PCI Slot 0 MEN CHAMELE Container device for cl E modified _ To get access to the SMBus devices e g to the BMC Board Management Controller a new component named Generic Access to SMBus will be added M Right click on the smb2_ device and select Add Component to SMBus slot 0 MDIS Wizard home andy MDIS F75P Project Build Edit Packages Help 0 e grs wig Component Functionality Cpu MEN F11S CompactPCI Intel Atom C EN SMBPCI S Pseudo device for Linux SI EN CHAMELE Container device for charr Properties Delete Add Component to SMBus s
11. This means that the two Control Processors are configured to be identical 2 4 1 CP Root File System Each of the CPs needs a root file system provided by the IOP which will be loaded through the NFS Network File System M Create a folder in var lib tftpboot CPX for the root file system of CPI mkdir p var lib tftpboot CPX mkdir var lib tftpboot CPX cplroot Mi Download a minimal root file system using debootstrap to folder cp1root debootstrap variant minbase arch i386 trusty var lib tftpboot CPX cplroot http de archive ubuntu com ubuntu Mi Copy the modules from the compiled IOP kernel to the root file system of CPI mkdir var lib tftpboot CPX cplroot lib modules cp rf lib modules kernelversion var lib tftpboot CPX cplroot lib modules M Copy the compiled IOP kernel to the ftpd folder and change the permissions cp boot vmlinuz kernelversion var lib tftpboot CPX vmlinuz chmod 778 var lib tftpboot CPX vmlinuz MEN Mikro Elektronik GmbH 27 21F075P90 E1 2014 10 13 Installing Linux 2 4 2 Additional Software for the CP Mi Create a chroot in the cp root directory to install additional software for CPI chroot var lib tftpboot CPX cplroot VI Add the universe package source for additional tools to etc apt source lst and update the repositories echo deb http de archive ubuntu com ubuntu trusty universe gt gt etc apt sources list apt get update M Install the t
12. ace ethO inet static address 192 168 2 1 etmask 255 255 255 0 Interface to CP2 auto ethl iface ethl inet static address 192 168 3 1 netmask 255 255 255 0 2 3 6 Creating a New User and Setting the Root Password Logging in as a root user is not possible until a password is set The new user men is optional Mi Do the following to create a user and set the root password adduser men usermod aG adm plugdev sudo men passwd root Enter new UNIX password Type in your password here and press Enter MEN Mikro Elektronik GmbH 21F075P90 E1 2014 10 13 Installing Linux 2 3 7 Installing a TFTP Server M Install a TFTP server apt get install atftpd M Configure the TFTP server and set the path to the ftpboot folder The configu ration file is located in etc default atftpd The tftpboot folder is used to provide the kernel initrd and the root file system for each of the CPs The addition is marked bold blue USE INETD false OPTIONS tftpd timeout 300 retry timeout 5 mcast port 1758 mcast addr 239 239 239 0 255 mcast ttl 1 maxthread 100 verbose 5 var lib tftpboot 2 3 8 Installing a DHCP Server M Install a DHCP server apt get install isc dhcp server M Configure the DHCP server with two subnetworks for CP1 and CP2 The con figuration file is located in etc dhcp dhcpd conf eth0 will be the interface from the IOP to CPI eth will be the interface from the IOP to CP2 4 DHCP for
13. ace in Chameleon FPC 1672076 QSPI QSPI in Chameleon FPGA 1672076 QSPI EM1AO5 QSPI on EM1A05 MI Select an instance number e g 1 and press OK to finish Mi Download the 13Z077 91 Ethernet driver package from the MEN website A Q www men de products 13Z077 91 html V Install the driver using the MDIS Wizard Select Packages gt Install Driver in the MDIS Wizard menu and select file 13Z07791 zip MEN Mikro Elektronik GmbH 23 21F075P90 E1 2014 10 13 Installing Linux M Right click on fpga again and add the 762087 ETH F75P Ethernet driver with an instance number of 1 and press OK to finish Add a device to the slot Description 167034 GPIO GPIO controller in Chameleon FPGA 1672034 GPIO IO GPIO controller in Chameleon FPGA io mapped 162037 GPIO GPIO controller with serial interface in Chameleon FPC 167076 QSPI QSPI in Chameleon FPGA 1672076 QSPI EM1AO05 QSPI on EM1A05 1672077 ETH 10 100Mbit Fast Ethernet IP core 167087 ETH 10 100Mbit Fast Ethernet IP core 1672087 ETH F75P 10 100Mbit Fast Ethernet IP core on F75P 1627127 GPIO 32bit GPIO controller in Chameleon FPGA 4 V Save the project via Project gt Save and exit the MDIS Wizard 2 3 3 Building and Installing MDIS After configuring your MDIS project you can build and install it M Build the MDIS project using the following command in the project folder selected before HOME MDIS_F75P make
14. before they are installed HOME MDIS_F75P lt Back Next gt Cancel M Select the kernel sources for the kernel compiled before The MDIS drivers will be compiled against this kernel a mdiswiz Select Target s Kernel Directory The directory of the kernel tree used for your target s kernel If you re doing selfhosted development it s typically fusr src linux This directory is used when building the kernel modules home men linux 3 15 6 Browse lt Back Cancel MEN Mikro Elektronik GmbH 17 21F075P90 E1 2014 10 13 Installing Linux MI Select shared or static libraries Shared libraries will be copied directly to the target disk mdiswiz Library mode Define whether to build use static or shared user state libraries In static mode libraries are statically linked to programs In shared mode programs dynamically link to the libraries shared mode makes programs smaller but requires installation of shared libraries on the target static Build static libraries and link programs statically No library installation required on target c Shared Build shared libraries These must be installed on the target Next gt Cancel M Select if the dbg or nodbg drivers will be installed mdiswiz Select build mode for kernel modules Defines whether to build and install the release nodbg or debug dbg versions of the kernel modules The debug
15. ce July 1 2006 all MEN standard products comply with RoHS legislation Since January 2005 the SMD and manual soldering processes at MEN have already been completely lead free Between June 2004 and June 30 2006 MEN s selected component suppliers have changed delivery to RoHS compliant parts During this period any change and status was traceable through the MEN ERP system and the boards gradually became RoHS compliant WEEE Application The WEEE directive does not apply to fixed industrial plants and tools The compliance is the responsibility of the company which puts the product on the market as defined in the directive components and sub assemblies are not subject to product compliance In other words Since MEN does not deliver ready made products to end users the WEEE directive is not applicable for MEN Users are nevertheless recommended to properly recycle all electronic boards which have passed their life cycle Nevertheless MEN is registered as a manufacturer in Germany The registration number can be provided on request Copyright 2014 MEN Mikro Elektronik GmbH All rights reserved Germany MEN Mikro Elektronik GmbH Neuwieder Strafe 3 7 90411 Nuremberg Phone 49 911 99 33 5 0 Fax 49 911 99 33 5 901 E mail info men de www men de France MEN Mikro Elektronik SAS 18 rue Ren Cassin ZA de la Ch telaine 74240 Gaillard Phone 33 0 450 955 312 Fax 33 0 450 955 211 E mail info men france fr www men
16. d in Chapter 2 Installing Linux in opt menlinux MDIS LL SMB2 TOOLS SMB2 BMC Displaying a Function Overview The tool includes a complete help function that displays a command list and also includes examples of how to call the tool smb2 bmc Usage Function S smb2 bmc lt dev name gt smb addr cmd lt opts gt Tool to control SMBus BMCs e g on F75P via BMC API commands Options dev smb cmd name addr device name e g smb2 1 smb device address default 0x9C command to execute Command List FS BMC MANAGEMENT gfr get firmware revision ghwb get hw board shwb lt boardid gt set hw board default F 5P ID 0x0010 feat features FS WATCHDOG wdo wdog on wdf wdog off wdt opts wdog trigger time in milliseconds 30000 wdtg wdog time get Calling examples get firmware revision smb2 bmc smb2 1 Ox9c gfr software reset smb2 bmc smb2 1 Ox9c swr c Copyright 2013 by MEN Mikro Elektronik GmbH Id smb2_bn CoCoV 1 1 2014 01 07 17 3002 Mew EXD Reading out the Firmware Revision smb2 bmc smb2 2 x9c gfr firmware revision 1 1 0 build number 2 verified flag 0x0 MEN Mikro Elektronik GmbH 21F075P90 E1 2014 10 13 Using F75P Functions under Linux 3 4 Board Information EEPROM There is an MDIS tool named smb2_boardident to read out the board information EEPROM You can find the source code of this tool in the MDIS
17. dd it to the respec tive rc local file so that the watchdog is triggered at start up of the CPs Linux OS bin bash PEPPER TEETER TEPER TEEPE TEEPE EE TE Export GPIO to access them from User Space PEPPER TEETER ETE TEPER TEETER TEEPE ETE echo 2 gt sys class gpio export GPIO 2 CP_WD_TRIG echo 9 gt sys class gpio export GPIO SUS4 CP_WD_TOUT_L echo 10 gt sys class gpio export GPIO SUS5 CP WD TOUT U2 echo 11 gt sys class gpio export GPIO SUS6 CP WD TOUT U1 echo 12 gt sys class gpio export GPIO SUS7 CO WD TOUT UO PEPER TEETER Configure GPIO as Outputs BEET TEE echo out gt sys class gpio gpio2 direction echo out gt sys class gpio gpio9 direction echo out gt sys class gpio gpiol0 direction echo out gt sys class gpio gpioll direction echo out gt sys class gpio gpiol2 direction TEE EE Set Watchdog timout to 2560ms THEHHHHHHHHHBHHHHHHHBHHHHHHHHHHHHHHBHBH echo 1 sys class gpio gpiol0 value echo 1 sys class gpio gpioll value echo 1 sys class gpio gpiol2 value echo 0 gt sys class gpio gpio9 value THEHHEHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHBHHH Trigger watchdog once to set the timout value ERE EE echo 1 gt sys class gpio gpio2 value sleep 0 2 echo 0 gt sys class gpio gpio2 value HAHA EAE Start trigger the Watchdog THEHHBHHHHHHBHHHHHHHHHHHHHHHHHB while true do echo Trigger WD echo 1 sys class gpio gpio2 value sleep 0 5 echo 0 g
18. directory that was created during the installation of Linux as described in Chapter 2 Installing Linux in opt menlinux MDIS_LL SMB2 TOOLS SMB2_BOARDIDENT Reading the Board Information EEPROM smb2_boardident smb2_2 Example output SMB2_BOARDIDENT c Copyright 2009 by MEN Mikro Elektronik GmbH Id smb2 boardident c v 1 3 2010 02 11 15 08 01 MRoth Exp Accessing smb2_2 smbAddr Oxae DUMP EEPROM EEPROD ID OxE Serial 00000001 Revision 02 01 00 HW Name F 5P00 Prod Date 2014 05 05 Rep Date FFFF FF FF MEN Mikro Elektronik GmbH 35 21F075P90 E1 2014 10 13 Demo Application 4 Demo Application This chapter describes the concept installation and functions of a Linux demo application that is available from MEN for the F75P 4 1 About the Application The F75P demo application for Linux is a traffic light simulator that demonstrates the interaction between the three F75P processors CP1 CP2 and IOP It consists of three independent tools that run on the three processors 7 The demo application is available for download on the F75P product E pages under Downloads www men de products 02F075P html 4 1 1 General Hardware and Software Requirements To be able to reasonably work with the F75P demo application we recommend that your target system is completely configured and running This includes your hardware components but also the software Linux OS with the necessary
19. documents for each product for the applicable use case and has to be agreed upon in writing by MEN and the customer Should the customer purchase or use MEN products for any unintended or unauthorized application the customer shall indemnify and hold MEN and its officers employees subsidiaries affiliates and distributors harmless against all claims costs damages and expenses and reasonable attorney fees arising out of directly or indirectly any claim or personal injury or death associated with such unintended or unauthorized use even if such claim alleges that MEN was negligent regarding the design or manufacture of the part In no case is MEN liable for the correct function of the technical installation where MEN products are a part of Trademarks All products or services mentioned in this publication are identified by the trademarks service marks or product names as designated by the companies which market those products The trademarks and registered trademarks are held by the companies producing them Inquiries concerning such trademarks should be made directly to those companies Conformity MEN products are no ready made products for end users They are tested according to the standards given in the Technical Data and thus enable you to achieve certification of the product according to the standards applicable in your field of application MEN Mikro Elektronik GmbH 4 21F075P90 E1 2014 10 13 About this Document RoHS Sin
20. france fr USA MEN Micro Inc 860 Penllyn Blue Bell Pike Blue Bell PA 19422 Phone 215 542 9575 Fax 215 542 9577 E mail sales menmicro com www menmicro com MEN Mikro Elektronik GmbH 5 21F075P90 E1 2014 10 13 Contents Contents E Generik cere cower UC v dod esse he teaecce QUEE IO ELECETMDLES 8 Jl Runmuelunux on FIP 2 2 cannes Eon oou u d ooo puts 8 1 2 Installation of Ubuntu Trusty using debootstrap 9 2 Installing Link 3e eom dees eee slew ROG US iow sees nase ae 10 2 1 Preparing a Mass Storage Device 0 0 e eee eee 10 2 2 Contours the OP 542 520 02 00 aeree dd hoe re ebd 10 2 2 R tFile SysleIsuusuaa vka iad 1991 9b ERO Rd CREE d 10 2 2 3 Additional Software Packages 00 10 2 2 3 Building a Linux Kernel on the Development System 11 2 24 Configuring the Kernel sese eR mre 12 22 5 Moaocdibying DAVES pecus pns pr p Eripe s 13 2 2 0 Building and Installing the Kernel 14 2 2 7 Installing the GRUB Boot Loader 15 2 9 Installing MDIS 5 sac ebbe ve er ESO SR ES oad dudes 16 2 3 1 Preparing for Installation ssis s0 0cces Re 16 2 3 3 Configuring MDIS using MDIS Wizard 16 2 3 3 Building and Installing MDIS 24 2 944 Creatine IN iius edo ee ornnes ed Pid 25 2 3 25 Configuring the Network 45229020 vdd oo grae sinia 25 2 3 6 Creating a New User and Set
21. itrd mkinitramfs o initrd 3 15 6 3 15 6 Mi Download and install GRUB 2 apt get install grub2 GRUB will ask you where to install the boot loader Select the disk of the connected target disk dev sdc to install GRUB on Mi Open the GRUB configuration file nano etc default grub M To get debug outputs on boot you have to change the following lines GRUB CMDLINE LINUX DEFAULT GRUB GFXMODE text Mi Update the new GRUB setting grub mkconfig o boot grub grub cfg M After that you can exit the chroot environment exit MEN Mikro Elektronik GmbH 15 21F075P90 E1 2014 10 13 Installing Linux 2 3 Installing MDIS MEN s MDIS framework simplifies your system configuration for Linux MEN provides a free MDIS System Package for Linux which includes a tool to configure a system project step by step and many MEN device drivers After configuring your MDIS project you can build and install it 2 3 1 Preparing for Installation M Download the 13MD05 90 MDIS5 System Package for Linux from the MEN website E www men de products 13MD05 90 html V Copy it to the home folder of the development machine M Unzip the 3md05 90 zip file e g to home men mdis sys e g using unzip unzip 13md05 90 zip M Navigate to the MDIS installation directory and call the install script cd home men mdis sys INSTALL The script will copy all files to opt menlinux 2 3 2 Configuring MDIS using M
22. lication 2e lug rev D Re cR n9 b E esd 36 4 1 1 General Hardware and Software Requirements 36 4 2 Installing the Demo Application 0 0 0 cee eee 37 43 Using the Demo Application 5 cp pe aren 64 3 DES katani 38 4 3 1 St bt eiri o eer re p cea IRR RE ERR EEP T Y Y ec 38 4 3 2 General Behavior of the Application 38 43 59 JPUncHons iizi6seuec s anera eR oed se oem d ded 38 5 Appendix ee erste ure rh heRPe nWRQUEESERE I UPC UE EE MES 40 S I Literature and DownloadS o isa esee Ree Ie erbe 40 5 1 CPU Board and BIOS sese remet 40 5S2 Ubuntu Linux iud ood e Rot P EGER rings 190 ox 40 213 embedded Linux sepa tlg m TAEA 40 5 1 4 Linux Kernel Configuration 005 40 2345 Linux Device DEVetS sss sa oor hoyo pre HER EE 40 5 1 6 Linux System Programming sls 41 Duley General o oosox oq ertaine Bawa bp dd Gana t paras 41 MEN Mikro Elektronik GmbH 7 General 1 General 1 1 Running Linux on F75P All processors of F75P Control Processors CP1 and CP2 and the I O Processor IOP support Linux You will need a boot image for every processor in the F75P system Note This document assumes that Linux is to run on all three processors Of course the three processors also support other operating system constel lations However the basic principle is always the same As the CPs exclusively employ network boot using the board s internal Ethernet co
23. lot 1 Add Component to SMBus slot 2 Add Component to SMBus slot 3 L MEN Mikro Elektronik GmbH 22 21F075P90 E1 2014 10 13 Installing Linux MI A new window will appear with all of the available devices on the SMBus For access to the BMC select the MB2 Generic access to SMBus with SMBPCI BBIS device and press OK Set the SMB BUSNBR in the Descriptor section to 0 and press OK to quit MDIS Wizard Add a device to the slot Description AD78 or PUxx PSU on backplane SMBus board controller on SMBus of F14 F15 F17 D601 LM63 temperature control on SMBus of F14 15 17 18 19P A19 LM63 temperature and fan control on SMBus of SC14 Generic access to SMBus with SMBPCI BBIS SMB2 F208 Configuration EEPROM on SMBus of F208 eeaniic raa 4A LI ae LLILLLL LL 6 amp am Lf ra 4 cma romagna Mi There are UART and Ethernet devices connected to the FPGA on F75P To add these devices right click on fpga and select Add Component to FPGA virtual slot X M Select the 6Z025 UART and press OK MDIS Wizard Add a device to the slot Description 1672001 SMB I2C SMBus Controller in Chameleon FPGA 1672024 SRAM RAM controller in Chameleon FPGA 1672025 UART RS232 485 422 UART in Chameleon FPGA 1672029 CAN CAN Layer 2 for MSCAN controller in Chameleon FPGA 162034 GPIO GPIO controller in Chameleon FPGA 162034 GPIO IO GPIO controller in Chameleon FPGA io mapped 162037 GPIO GPIO controller with serial interf
24. ment kernel code needs to be modified to allow PCI Express burst access M Open the file Jinux 3 15 6 arch x86 mm pat c and replace the pat x mtrr type function with the following code static unsigned long pat x mtrr type u64 start u64 end unsigned long req type Look for MTRR hint to get the effective type in case where PAT request is for WB if req type PAGE CACHE WB u8 mtrr type mtrr type mtrr type lookup start end switch mtrr type case MTRR TYPE WRBACK case MTRR TYPE WRTHROUGH return PAGE CACHE WB default return PAGE CACHE UC MINUS j H return req type 2 2 6 Building and Installing the Kernel The kernel will be built on the development system and directly installed on the target disk Mi Build the kernel using option j to start more threads during compilation depending on the development system CPU cores make j2 Compile kernel and modules make modules install INSTALL MOD PATH mnt Install modules on target disk MI Install the kernel on the target disk cp System map mnt boot cp arch x86 boot bzImage mnt boot vmlinuz 3 15 6 cp config mnt boot config 3 15 6 MEN Mikro Elektronik GmbH 14 21F075P90 E1 2014 10 13 Installing Linux 2 2 7 Installing the GRUB Boot Loader Install the GRUB 2 boot loader which will load the kernel on the IOP MI Create a chroot chroot mnt M Navigate to the boot directory cd boot MI Create an initial in
25. nnection to load their boot images they need a DHCP TFTP server running on the IOP The basic concept of running Linux on F75P is to start up a Linux on the IOP and provide the kernel initrd initial ramdisk and a root file system for each of the CPs The CPs wait until the TFTP and DHCP servers are running on the IOP and then boot the files provided by the IOP The figure below shows the files and servers running on each system Figure 1 Linux on F75P block diagram IOP Linux TFTP DHCP NFS CP1 root file system CP2 root file system CP1 Linux kernel e CP2 Linux kernel e CP1 initrd e CP2 initrd F75P but provides the necessary OEM software support through the MEN MDIS5 system package for Linux and through dedicated driver software Please note that MEN does not provide a dedicated Linux BSP for MEN Mikro Elektronik GmbH 8 21F075P90 E1 2014 10 13 General 1 2 Installation of Ubuntu Trusty using debootstrap You can generally use different Linux distributions with F75P As an example this document describes installation of Ubuntu Trusty with kernel 3 15 6 using debootstrap for the root file system Ubuntu Saucy 32 bit was used on the development machine Ubuntu 13 10 If you use a different distribution version some commands e g debootstrap may vary It is not possible to install the Linux system directly on the F75P because each of the CPs has a watchdog that will signal an error if it is
26. not triggered through software The timeout for the initial trigger is too short for installing an operating system To install Linux you need to prepare the operating system on a SATA mass storage device that is directly connected to the development machine e g using a SATA port or a USB to SATA adapter Requirements Linux development system or Linux Virtual Guest system nternet connection on the development system USB to SATA adapter if necessary MEN driver software 13MD05 90 MDIS5 System Package for Linux 13Z077 91 Linux Ethernet driver for F75P E MEN driver software is available for download on the F75P b 2 product pages under Downloads www men de products 02F075P html Note The 13MM02 90 Linux driver for the RX8581 real time clock is available for Linux kernels up to 3 14 The driver is already included in the upstream Linux kernel from kernel release 3 14 For the installation described in this user guide you do not need the additional RTC driver MEN Mikro Elektronik GmbH 9 21F075P90 E1 2014 10 13 Installing Linux 2 Installing Linux 2 1 Preparing a Mass Storage Device M Connect an HDD SDD to your development Linux system e g using a USB or SATA connection MI Create a partition on the HDD e g using command cfdisk MI Format the partition with an ext3 file system with the following command dev sdcl is the new partition mkfs ext3 dev sdcl M Mount the destinati
27. on partition to mnt on your development Linux system mount dev sdcl mnt For all further commands the partition dev sdc1 mounted to mnt is used 2 2 Configuring the IOP 2 2 1 Root File System Mi Install the base system mini using debootstrap to the destination partition mounted on mnt This will download a basic root file system for the IOP based on Ubuntu Trusty debootstrap variant minbase arch i386 trusty mnt http de archive ubuntu com ubuntu Note If you do not use Ubuntu Saucy on your development system e g Ubuntu lucid the script named trusty is not included in debootstrap T Please download and install the newest version of deboot gt strap or use a different version of the root file system in the debootstrap command 2 2 2 Additional Software Packages The basic root file system does not include tools which are recommended for a running system The following additional packages are just an example of some tools for a working system M Create a chroot of the new installed base system to install the tools directly on the target disk mount o bind dev mnt dev mount o bind dev pts mnt dev pts mount t sysfs sys mnt sys mount t proc proc mnt proc cp proc mounts mnt etc mtab cp etc resolv conf mnt etc resolv conf chroot mnt HH MEN Mikro Elektronik GmbH 10 21F075P90 E1 2014 10 13 Installing Linux V Add the universe package s
28. ools apt get install nano net tools i2c tools pciutils openssh server iputils ping sudo M Exit the chroot exit 2 4 3 Creating Configuration Files for PXE Boot Now you need to create two configuration files for PXE boot for CP1 and CP2 in folder var lib tftpboot CPX You need to create a file for each CP The file name depends on the IP address given for the CP e g COA802 is a hexadecimal number meaning a 192 168 2 0 network M Create a configuration file for CPI named C0A802 and insert the following two lines 1 Label linux 2 DEFAULT CPX vmlinuz ip ethO dhcp netboot nfs nfsroot 192 168 2 1 var lib tftpboot CPX cplroot rw showopts initrd CPX initrd CPl img acpi off Mi Create a configuration file for CP2 named C0A803 and insert the following two lines 1 Label linux f DEFAULT CPX vmlinuz ip eth0 dhcp netboot nfs nfsroot 192 168 3 1 var lib tftpboot CPX cp2root rw showopts initrd CPX initrd CP2 img acpi off PXE Linux needs a file named pxelinux cfg in the root of the tftpboot folder MI Create a symlink to CPX from pxelinux cfg so the TFTP server can find the configuration files Navigate to directory var lib tftpboot and create the symlink In s CPX pxelinux cfg 2 4 4 Downloading the PXE Linux Boot File M Navigate to var lib tftpboot and download the pxelinux 0 file from the Ubuntu server wget http de archive ubuntu com ubuntu dists trusty main installer i386 current images ne
29. ou need to change the password for each of the CPs Also add a user account named e g men MI Change the password for CPI chroot var lib tftpboot CPX cplroot passwd root Enter new UNIX password Type in your CP1 password here and press Enter M Add a user account for CP1 adduser men Enter new UNIX password Type in your user password here and press Enter usermod aG adm plugdev sudo men exit MI Change the password for CP2 chroot var lib tftpboot CPX cp2root passwd root Enter new UNIX password Type in your CP2 password here and press Enter M Add a user account for CP2 adduser men Enter new UNIX password Type in your user password here and press Enter usermod aG adm plugdev sudo men exit chroot of cp2root exit chroot of mnt 2 4 8 Configuring the Watchdog Trigger using a Script Each of the CPs software has to configure and trigger the watchdog There are GPIOs connected to the CPU to configure and trigger the watchdog Theses are supported by a driver named gpio sch This driver exports the GPIO features to the sysfs file system A bash script can be used to do this final application software running on each of the CPs has to trigger the Please note that this is just an example to get the OS running The watchdog MEN Mikro Elektronik GmbH 30 21F075P90 E1 2014 10 13 Installing Linux MI Create the following script in each CP root file system and a
30. ource for additional tools to etc apt source lst and update the repositories echo deb http de archive ubuntu com ubuntu trusty universe gt gt etc apt sources list apt get update It is useful to add the following packages to the minimal root file system nano Editor net tools ifconfig iputils ping ping i2c tools i2cdetect e pciutils lspci e unzip for MDIS e build essential make gcc openssh client openssh server IOP debootstrapt download minimal base system minicom to communicate with the CPs via UART MI Install the tools apt get install nano net tools i2c tools pciutils unzip build essential openssh client openssh server debootstrap iputils ping minicom sudo Note The openssh server package will display some errors like Server cannot start You can ignore these errors because in the chroot installation environment it is not possible to start those servers M Exit the chroot exit 2 2 3 Building a Linux Kernel on the Development System MI Download the Linux kernel source 3 15 6 from kernel org e https www kernel org pub linux kernel v3 x linux 3 15 6 tar xz MI Unzip the sources This will create a directory named linux 3 15 6 tar xvfJ linux 3 15 6 tar xz MI Navigate to the created folder and create a default kernel configuration cd linux 3 15 6 make defconfig MEN Mikro Elektronik GmbH ll 21F075P90 E1 2014 10 13 Installing Linux
31. packages and drivers see Chapter 2 Installing Linux and Chapter 4 2 Installing the Demo Application on page 37 MEN Mikro Elektronik GmbH 36 21F075P90 E1 2014 10 13 4 2 Demo Application Installing the Demo Application In order to use the demo application you need running operating system images for all three F75P processors Chapter 2 Installing Linux gives you all instructions to do this To install the demo application do the following iral KI E Download the demo application article no 13Y026 90 from the MEN website The demo application is available for download on the F75P E product pages under Downloads www men de products 02F075P html Install an X Server and a window manager such as Gnome Install the Python 3 x package Install the Tkinter graphical user interface package python3 tk Unzip the F75P Demo package to a folder on your target system e g to home user Call make to create the f75p_demo_cp binary make Copy the f75p_demo_cp binary to the CP1 root folder cp f75p demo cp var lib tftpboot CPX cplroot root Copy the f75p_demo_cp py script to the CP2 root folder cp f75p demo cp py var lib tftpboot CPX cp2root root Add the tools to the rc local files autostart of the two CP images For CPI var lib tftpboot CPX cplroot etc rc local f7bp demo cp 192 168 3 1 amp For CP2 var lib tftpboot CPX cp2root etc rc local python2 7 f75p_demo_cp
32. port NFS server support for NFS version 3 NFS server support for NFS version 4 MEN Mikro Elektronik GmbH 12 21F075P90 E1 2014 10 13 Installing Linux Serial Port Configuration Device Drivers gt Character devices gt Serial drivers gt Number of 8258 serial ports to register at runtime gt 10 Graphics Driver Device Driver gt Graphic support gt Direct Rendering Manager gt Intel GMA5 600 KMS Framebuffer gt Intel GMA608 support 2 2 5 Modifying Drivers There are some drivers in the kernel which will not work the way they are delivered The kernel needs some patches to work correctly on F75P EG20T l2C Driver The I2C driver for the Intel EG20T chipset assembled with the IOP needs to be modified because the driver for the I2C controller on the Intel Atom CPU cannot be loaded together with the EG20T chipset I2C driver MI Open the source file in linux 3 15 6 drivers i2c busses i2c eg20t c and replace the following function call in pch i2c probe pch adap nr i ret i2c add numbered adapter pch adap ret i2c add adapter pch adap MEN Mikro Elektronik GmbH 13 21F075P90 E1 2014 10 13 Installing Linux Burst Cache for Ethernet The Ethernet buffers of each of the CPs are located in the FPGA rather than in the main memory of the CPU To allow burst access to this buffer instead of single access to increase the transfer speed the memory manage
33. py 192 168 2 1 amp MEN Mikro Elektronik GmbH 37 21F075P90 E1 2014 10 13 Demo Application 4 3 Using the Demo Application 4 3 1 Start You can start the F75P Demo application in the IOP Linux by calling the f75p demo iop py script python3 3 f7 5p demo iop py You will see the following graphical user interface c F75P Demo 0x CP1 State CP2 State IOP Result o e e O O oe O e e Press the Start button on the right to start the traffic light simulator 4 3 2 General Behavior of the Application Without any user interference the traffic lights behave just like any real life traffic lights The red and green traffic light states will last 12 seconds each and the yellow orange amber light states will last 4 seconds The IOP application acts as a voter and visualizes the states of the CPs If both CPs have the same state the traffic light of the IOP changes according to the state of the CPs If the results of the two CPs don t match as provoked by the error functions see below the IOP signals an error 4 3 3 Functions The buttons of the user interface simulate error signal and reset injections Fast The Fast button simulates pedestrians that press the traffic light button to pass the street The CPs will get the signal to switch faster to red or green and the state machine of the CPs will be adjusted Time Error The Time Error buttons inject a sleep value to the respecti
34. t sys class gpio gpio2 value sleep 0 5 done MEN Mikro Elektronik GmbH 31 21F075P90 E1 2014 10 13 Installing Linux 2 5 Using the Installation on F75P The installation is finished now M Disconnect the mass storage device containing the installation from your devel opment system and connect it to the F75P M Power up F75P The IOP will boot Linux and will provide the files needed for each of the CPs to be able to boot After the system has started the CPs are accessible on IOP through SSH e CPI is available in an IP address range of 192 168 2 10 to 192 168 2 15 CP2 is available in an IP address range of 192 168 3 11 to 192 168 2 15 MEN Mikro Elektronik GmbH 32 21F075P90 E1 2014 10 13 Using F75P Functions under Linux 3 Using F75P Functions under Linux This chapter gives hints on how to use some dedicated functions of F75P especially where specific software support is already in place It is not a complete functional description Tools available within the MDIS framework were built during the MDIS build process 3 1 Graphical User Interface GUI If you want to install a Graphical User Interface GUI connect the SATA mass storage device again to the development machine M Mount the disk and create a chroot mount dev sdcl mnt chroot mnt MI This example shows how to install the LXDE desktop environment using the LXDM display manager as login manager apt get install Ixde 3 2 Real
35. talics Folder file and function names are printed in italics bold Bold type is used for emphasis mono A monospaced font type is used for hexadecimal numbers listings C function descriptions or wherever appropriate Hexadecimal numbers are preceded by 0x comment Comments embedded into coding examples are shown in green text mug Signal names followed by a hashtag or preceded by a forward slash indicate that this signal is either active low or that it becomes active at a falling edge in out Signal directions in signal mnemonics tables generally refer to the corresponding board or component in meaning to the board or component out meaning from it the board or component Blue vertical lines in the outer margin indicate sections where changes have been made to this version of the document MEN Mikro Elektronik GmbH 3 21F075P90 E1 2014 10 13 About this Document Legal Information Changes MEN Mikro Elektronik GmbH MEN reserves the right to make changes without further notice to any products herein Warranty Guarantee Liability MEN makes no warranty representation or guarantee of any kind regarding the suitability of its products for any particular purpose nor does MEN assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all liability including without limitation consequential or incidental damages TO THE EXTENT APPLICABLE SPECI
36. tboot pxelinux 8 MEN Mikro Elektronik GmbH 28 21F075P90 E1 2014 10 13 Installing Linux 2 4 5 Creating initrd for Each of the CPs V Open the initramfs configuration file located in var lib tftpboot CPX cp 1 root etc initramfs tools initramfs conf and set the following options for NFS net boot MODULES netboot BOOT nfs V Open the initramfs modules file located in var lib tftpboot CPX cp I root etc initramfs tools modules and add the following modules to be loaded on boot ZMEN Chameleon FPGA en Ix chameleon en chameleon io ZMEN 167087 ETH Ethernet Driver en Ix z77 f75p mode 100FD 100FD phyadr 1 1 nodma 1 1 en oss MEN Frodo UART Driver en Ix frodo Now you need to create the initrd image for each of the CPs M Navigate to var lib tftpboot CPX Mi Create the newly configured initrd image for CP1 mkinitramfs d cplroot etc initramfs tools o initrd CPl img lt kernelversion gt M Duplicate the initrd image for CP2 cp initrd CPl img initrd CP2 img Mi Duplicate the root file system for CP2 cp rf cplroot cp2root 2 4 6 Setting the Host Name for Each CP Mi Set a host name for each of the CPs in the root file system echo CP1 gt var lib tftpboot CPX cplroot etc hostname echo CP2 var lib tftpboot CPX cp2root etc hostname MEN Mikro Elektronik GmbH 29 21F075P90 E1 2014 10 13 Installing Linux 2 4 7 Setting the Password for Root in CP1 and CP2 To get root access y
37. the targets root tree mnt dev Browse lt Back Cancel MI Leave the default device major number for the MDIS device MDIS device major number Device major number for MDIS driver You must select an unused number Lookup the numbers in use by doing cat proc devices on your target system Value is ignored if device filesystem is included in kernel 248 Back Cancel MEN Mikro Elektronik GmbH 20 21F075P90 E1 2014 10 13 Installing Linux M Select the F75P as CPU board for MDIS configuration mi mdiswiz 0x Select a CPU board Please select your target CPU board from the list below F18 CompactPCI Express Core 2 Duo 64bit CPU F19P F19C CompactPCI PluslO Core 2 Duo 64bit CPU FIN CompactPCI PowerPC 824x CPU with PC MIP slots F2 CompactPCI Pentium CPU F21P F21C CompactPCI PluslO Core i7 64bit CPU F50P CompactPCI PluslO MPC8548 CPU CompactPCI MPC8260 CPU CompactPCI Pentium CPU 3U CompactPCI PluslO Safe Railway Computer CompactPCI Pentium M CPU G20 CompactPCI Serial Intel Core i7 CPU G22 CompactPCI Serial Intel Core i7 CPU xl lt Back Finish Cancel After that the MDIS Wizard will show a basic configuration with the CPU and the connected FPGA MDIS Wizard home andy MDIS_F75P Project Build Edit Packages Help jo 684 aw 729 C m ain Component Location Model Functionality MEN F11S CompactPCI Intel Ator
38. ting the Root Password 25 2 395 Installing aT PUP Server anuo es maeieiut ote sediee ions 26 2 3 8 Installing a DHCP Server eese m esas ce 26 2 3 0 nstallinp an NES Serverigit ceiaapeicsra patei salad 26 2 3 10 Additional Modules Loading on Boot 27 2 3 11 Instantiating the System RTC 27 2 4 Connpuring CPT and CP tag iua nau iua doe d Rhea 27 2 4 CP Root Fil System iet ee eem RR 27 2 4 3 Additional Software for the CP 28 2 4 3 Creating Configuration Files for PXE Boot 28 2 4 4 Downloading the PXE Linux Boot File 28 2 4 5 Creating initrd for Each of the CPs 5 sees 29 2 4 6 Setting the Host Name for Each CP 29 2 4 7 Setting the Password for Root in CP1 and CP2 30 2 4 8 Configuring the Watchdog Trigger using a Script 30 2 5 Using the Installation on FP75P 2 usss seo rh eR 32 3 Using F75P Functions under Linux eeeeeee eere 33 3 1 Graphical User Interface GUI enm th t ee 33 3 2 ealsLume Clock BT 4 4 agars este watacheale watdoaaw adhere ane 33 3 3 Board Management Controller BMC 0 0005 34 35 44 Board Information EEPROM 5 sucesos m hen 35 MEN Mikro Elektronik GmbH 6 21F075P90 E1 2014 10 13 21F075P90 E1 2014 10 13 Contents 4 D mo Application eere IURE keeles UP E EP NP ERU 36 4 About the App
39. ve CP If the CP determines that the Time Error button was pressed the CP will send its current state later than normal The IOP recognizes the time difference between the two CPs and will start flashing the yellow orange amber light The flashing yellow light simulates the safe state of the F75P MEN Mikro Elektronik GmbH 38 21F075P90 E1 2014 10 13 Demo Application Light Error The Light Error buttons inject a state machine error to the CPs The CPs will then send back an error state to the IOP The error state of the CP will be visualized by all lights on i e all three lights are active on the faulty CP Similarly to the Time Error the IOP will start flashing the yellow orange amber light to simulate the safe state of the F75P Reset The Reset button is used to reset the CP states to the starting condition which is a red light The reset signal also restarts the IOP voter MEN Mikro Elektronik GmbH 39 21F075P90 E1 2014 10 13 Appendix Literature and Downloads CPU Board and BIOS F75P product pages www men de products 02F075P html You can find documents and downloads under Downloads Some documents may only be available on request or within a bundle Please contact MEN sales for more information Ubuntu Linux Ubuntu Linux pages www ubuntu com Ubuntu support www ubuntu com support Embedded Linux Building Embedded Linux Systems 2nd Edition Karim

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