Embedded & Industrial Computing Hardware Platforms for Embedded and Industrial Computing
LEC-2136 V1.1
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User's Manual Publication date:2014-03-11
About
About
Overview
Acknowledgement
Icon Descriptions The icons are used in the manual to serve as an indication of interest topics or important messages. Below is a description of these icons: NOTE: This check mark indicates that there is a note of interest and is something that you should pay special attention to while using the product.
WARNING: This exclamation point indicates that there is a caution or warning and it is something that could damage your property or product.
Intel, Pentium and Celeron are registered trademarks of Intel Corp. Microsoft Windows and MS-DOS are registered trademarks of Microsoft Corp. All other product names or trademarks are properties of their respective owners.
Compliances and Certification CE Certification This product has passed the CE test for environmental specifications. Test conditions for passing included the equipment being operated within an industrial enclosure. In order to protect the product from being damaged by ESD (Electrostatic Discharge) and EMI leakage, we strongly recommend the use of CE-compliant industrial enclosure products.
FCC Class A Certification
Online Resources The listed websites are links to the on-line product information and technical support. Resource
Website
Lanner
http://www.lannerinc.com
Product Resources
h t t p : / / w w w. l a n n e r i n c. co m / download-center/
RMA
http://eRMA.lannerinc.com
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.
Revision History
Copyright and Trademarks
Version 1.1
Changes Change the super I/O chip to W83627DHG-P
This document is copyrighted, © 2014 All rights are reserved. The original manufacturer reserves the right to make improvements to the products described in this manual at any time without notice. No part of this manual may be reproduced, copied, translated or transmitted in any form or by any means without the prior written permission of the original manufacturer. Information provided in this manual is intended to be accurate and reliable. However, the original manufacturer assumes no responsibility for its use, nor for any infringements upon the rights of third parties that may result from such use.
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TTaTTable of Contentsbeable of Conte Chapter 1: Introduction
4
System Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Chapter 2: System Components
6
System Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Front Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Rear Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Chapter 3: Board Layout
10
External Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Internal Connectors and Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Connectors and Jumpers List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Jumper Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Chapter 4: Hardware Setup
16
Preparing the Hardware Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 System Memory Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Hard Disk Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 CompactFlash Card Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 3G SIM Card Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 3G Wireless Module Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Wall Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Appendix A: Programming Watchdog Timer
19
3
Chapter 1 Chapter 1: Introduction Thank you for choosing the LEC-2136. This product has an embedded ultra-low voltage Intel Pineview Processor ATOM D525 (Dual Core,1M cache,1.8GHz) CPU, which delivers power-efficient processing. This fanless and compact platform can be broadly applied across industries from networking, portable medical, industrial control while maintaining low power consumption with good performance. Here is the list of key features: •• Intel integrated Graphics Media Accelerator 3150
which supports VGA (up to 2048x1536)
Introduction System Specification LEC 2 Series Dimension (WxHxD)
198x42x144.8mm (7.722”x1.638”x5.6472”)
Processor
Intel Atom D525 1.8GHz
Chipset System Memory Storage
Graphic Controller
•• 5 10/100/1000 Mbps LAN (provided by Intel 82583V) IO
SATA
2.5” HDD/SSD drive bay x1
Video Grabber
1 x Intel 82574L LAN Chip 5 x Intel 82583V LAN Chip Intel GMA3150 GbE RJ45 x6 DB15 x1 for VGA, DVI-D (sup to 2048x1536) No
Serial I/O
DB9 x1 for RS232;
USB 2.0 Power Input
Type A x4 DC_in with Phoenix contact Mini-PCIe x1 (with SIM card reader) External: Power-on button, Power-on switch, 3x SMA antenna hole, reset. Internal: PS/2 keyboard and mouse +24Vdc 2.5A Winbond W83627DHG-P integrated watchdog timer 1~255 level Linux , XPE/WES2009, XP PRO FES, WS7E, WS7P, WIN 7 PRO-E CE, FCC Class A No
VGA LAN
Expansion
•• One SATA hard disk and one CompactFlash support •• One RS-232 serial port via DB9 and one RS-232 serial
Others
port via pin headers
•• 4 USB Type A connector
Intel ICH8M DDR3 667/800 MHz, non-ECC Up to 4GB CF socket Type I/II x1
Display
(provided by 82574L)
reader to support 3G Internet service)
Technology Max. Capacity IDE
Ethernet Controller
•• One RJ-45 Management Port 10/100/1000 Mbps LAN
•• One Mini-PCIe expansion slots (paired with a SIM card
LEC-2136
Power Input Hardware Monitor OS Support Certifications Compliance Operating Temperature Range with Commercial Components
Embedded and Industrial Computing
-5~45°C/23~113°F
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Chapter 1
Introduction
Package Contents Your package contains the following items: •• LEC-2136 Embedded System •• DC+12V 60W Power Adapter (24V 60W
0P0W060240A01)
•• Serial-ATA/Power Cable (P/N: 080W1N2201001) •• Wall-Mounting Kit (P/N: SE9ESA900R100) •• Drivers and User’s Manual CD
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Chapter 2
System Components
Chapter 2: System Components System Drawing Mechanical dimensions of the LEC-2136 Unit: mm
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Chapter 2
System Components
Block Diagram The block diagram depicts the relationships among the interfaces and modules on the motherboard..
Processor VGA
DDR3
VGA
1xSO-DIMM
ATOM D525 4xDMI
GbE LAN
6x RJ-45
Intel USB
4x Type A
SATA-II 2x Connector
SPI
BIOS Flash
USB 2.0 Ports
SATA
2x PCIe
1x82574L 5x82583V
USB
Mini PCI Express Socket
SIM Card Reader
ICH8M IDE
Compact Flash Socket
LPC
H/W Monitor WDT PS/2 KB/MS Pin Header
Embedded and Industrial Computing
Winbond
W83627DHG-P W83627UHG
Serial Port RS232 1x DB-9
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Chapter 2
System Components
Front Components F1
Component
F1 Power Button with dual LED
F2
F3
Description
F4
F5
Pin Definition Reference
ATX Power-on button with LEDs: CN2 on page 14 Standby mode in Red; Power-on mode in Green F2 Dual USB 2.0 Stack Connector An USB type A connector. Besides this CN10 on page14 one, there is another Dual USB connectors on the back panel. F3 VGA Port The VGA port is provided by integrat- VGA1 on page 13 ed Graphics Media Accelerator 3150. The displays can support VGA up to 2048x1536. F4 DC-In (power) Power-in Connector through 1x2 Pin CN9 on page 14 Phoenix Contact Connector. The input power should be 24V 2.5A. F5 Reset Reset switch SW1 on page 13 The reset switch can be programmed to be either a software or hardware reset. The software reset can set the designated software to its default settings. The hardware reset will trigger the reset signal and reboot the whole system. Refer to JP2 jumper in Chapter 3 Board Layout and the sample code on the Driver and User Manual CD.
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Chapter 2
System Components
Rear Components R1
Component
R2
R3
R4
Description
R1 Serial Port COM1
R2 HDD (Yellow), Status and
Serial ports through the DB-9 connector; COM1 supports RS232 protocol. The system also has another COM port (COM2) via the internal pin header. HDD
Power Led (Green)
•
Blinking: data access activities
•
Off: no data access activities
Pin Definition Reference
COM1on page 13
Status. This LED can be programmed to behave like this (refer to the Driver and User Manual CD for sample code): •
Red: abnormal condition arises
•
Off: normal operation
Power • R3 Dual USB2.0 Stack Connector R4 Dual 10/100/1000 LAN Ports
LINK/ACT
speed
On: The computer is on.
• Off: The computer is off . An USB type A connector.Besides CN7 on Page 14 this one, there is another Dual USB connectors on the front panel. Two RJ-45 (network) jacks with LED LAN1/LAN2/LAN3 on page 14 indicators as described below. The LAN ports are provided by Intel 82574L and 82583V. The LAN1 (powered by 82574L) can serve management functions including the PXE (Preboot eXecution Environment; you need to turn on the PXE in the BIOS). LINK/ACT (Yellow) •
On/Flashing: The port is linking and active in data transmission.
•
Off: The port is not linking.
SPEED (Green/Amber)
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Amber: The connection speed is 1000Mbps.
•
Green: The connection speed is 100Mbps
•
Off: .The connection speed is 10Mbps. 9
Chapter 3
Board Layout
Chapter 3: Board Layout External Connectors The following picture highlights the location of system input/output connectors. Refer to the table 3.1 Connector List for more details. CN10
CN2
LAN3
LAN2
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LAN1
VGA1
CN7
DC_IN
COM1
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Chapter 3
Board Layout
Internal Connectors and Jumpers The following picture highlights the location of internal connectors and jumpers. Refer to the table 3.1 Connector List for more details.
CN6
SIM Card Reader
CN4
JP1
J9 J6
J8
LEB-2136 Embedded and Industrial Computing
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Chapter 3
Board Layout
Connectors and Jumpers List The tables below list the function of each of the board jumpers and connectors by labels shown in the above section. The next section in this chapter gives pin definitions and instructions on setting jumpers. Table 3.1 Connector List for LEB-2136 Labels Function CN2 CN4 CN6 CN7 CN9 CN10 COM1 J6 J8 J9 JP1 JP2 LAN1/LAN2/LAN3 SW1 VGA1
Power Button Connector CompactFlash Connector Mini-PCIe Connector USB 1&2 Connector DC_IN Power Connector USB 3&4 Connector RS-232 Communication Port Serial-ATA Data Port Serial-ATA Power Connector RS-232 Communication Pin Header CMOS reset Hardware or Software Reset Selection Jumper Ethernet Ports Reset Button VGA Connector
Embedded and Industrial Computing
Pin Definition Reference Page P14 P14 P14 P14 P14 P14 P13 P13 P13 P13 P13 P13 P14 P13 P13
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Chapter 3
Board Layout
Jumper Settings
RS-232 Serial Port NO. 2(J9): It is a RS-232 port via the internal pin header.
LEB-2136
Serial-ATA Connector (J6): It is for connecting a 2.5’’ harddisk to be served as your system’s storage. It can support SATA II which features Data transfer rates up to 3.0 Gb/s (300 MB/s). Pin No. 1 2 3 4 5 6 7
7 6 5 4 3 2 1 SATA1
4 3 2 1
Pin No. 1 2 3 4
1 3 5 7 9
Function Ground Ground TX+ TXGround RXRX+
4-pin Serial-ATA Power Connector (J8): connecting the SATA power cord.
2 4 6 8 10
It is for
Pin No. 1-2 2-3
Pin Name Data Carrier Detect (DCD) Received Data (RxD) Transmitted Data (TxD) Data Terminal Ready (DTR) Signal Ground Data Set Ready (DSR) Request To Send (RTS) Clear To Send (CTS) Ring Indicator (RI)
DB-15 VGA Connector (VGA1) 5 10 15
Function VCC12 (12V) Ground Ground VCC (5V)
Pin No. 1 2 3 4 5 Pin No. 11 12 13 14 15
Clear CMOS jumper (JP1): It is for clearing the CMOS memory.
1 2 3
Pin No. 1 2 3 4 5 6 7 8 9
Pin Name Normal (Default) Clear CMOS
1 6 11
Description RED GREEN BLUE N/A GND Description N/A DDC DATA HSYNC VSYNC DDC CLK
Pin No. 6 7 8 9 10
Description CRT DET GND GND VCC5 GND
Front Panel Reset Button (SW1) RS-232 Serial Port NO. 1 (COM1): It is a RS-232 port through the D-SUB9 connector.
2
1
4
3
12345
6789
Pin No. 1 2 3 4 5
Pin Name Data Carrier Detect (DCD) Received Data (RxD) Transmitted Data (TxD) Data Terminal Ready (DTR) Signal Ground (GND)
Pin No. 6 7 8 9
Embedded and Industrial Computing
Pin Name Data Set Ready (DSR) Request To Send (RTS) Clear To Send (CTS) RIA
Pin No. 1 2 3 4
Pin Name reset signal GND NC GND
Hardware or Software Reset Selection (JP2): The reset function (SW1) can be selected to be as a software reset or hardware reset. The software reset can set the designated software to its default settings. The hardware reset will trigger the reset signal and reboot the whole system. 3 2 1
Pin No. 1-2 (Default) 2-3
Description Software Reset Hardware Reset
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Chapter 3
Board Layout
CompactFlash Connector (CN4): It is for connecting a Compact Flash card to be served as your system’s storage. 50
Dual USB 2.0 Port Connector #1 and #2 (CN7): Dual USB 2.0 Port Connector #3and #4 (CN10)
26
5 6 7 8 25
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
Function GND CF_DD3 CF_DD4 CF_DD5 CF_DD6 CF_DD7 CF_DCS0# A10(GND) OE#(GND) A9(GND) A8(GND) A7(GND) VCC A6(GND) A5(GND) A4(GND) A3(GND) CF_A2 CF_A1 CF_A0 CF_DD0 CF_DD1 CF_DD2 WP(NC) CF_CD2#
1
Pin No. 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
1 2 3 4
Function CF_CD1# CF_DD11 CF_DD12 CF_DD13 CF_DD14 CF_DD15 CF_DCS1# VS1# CF_DIOR# CF_DIOW# WE#(VCC3) CF_IRQ# VCC CSEL#(GND) VS2# CF_RESET# CF_IORDY CF_DMARQ CF_DDACK# CF_ACT# CF_DIAG CF_DD8 CF_DD9 CF_DD10 GND
LAN1/LAN2/LAN3 Ports: The LAN ports are provided by Intel 82574L(the management port on LAN 1) and 82583V Ethernet Controllers. The following lists its main features: •
PXE remote boot
•
TCP segmentation offload, TCP, UDP, IPv4 checksum offload
The 82574L has more advanced features such as: •
Interrupt moderation, VLAN support, jumbo frames, RSS, MSI, MSI-X
•
IPMI pass-through via SMBus or NC-SI, WoL, PXE remote boot, ISCSI boot, VLAN filtering
•
Supports IEEE 802.1Q VLAN tagging Pin No. Description Fast Ethernet Gigabit Ethernet 1 TX+ BI_DA+ 2 TXBI_DA3 RX+ BI_DB+ 4 -BI_DC+ 5 -BI_DC6 RXBI_DB7 -BI_DD+ 8 -BI_DDEmbedded and Industrial Computing
Pin No. 1 2 3 4 5 6 7 8
Pin Name USB power USB0_DATUSB0_DAT+ Signal Ground USB power USB1_DATUSB1_DAT+ Signal Ground
DC_IN Power Connector (CN9): This connector is provided power in connector.
1 2
Pin No. 1 2
Pin Name DC_GND DC_IN
Front Panel Power Button (CN2): It provides redundant LED signal and button function on the front panel. Red: System standby Green: System power-on Pin No. PAD1 1 2 L1
Pin Name Ground Ground Ground PWR_LED+ / STB_LED-
Pin No. PAD2 3 4 L2
Pin Name Ground BUTTONBUTTONPWR_LED- / STB_LED+
Mini PCI Express Connector (CN6): t is for connecting WiFi module to serve Wireless LAN connections or connecting Wireless 3G module for mobile Internet connections. The socket supports only Universal Serial Bus (USB) signal type PCIe card. PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Pin Name WAKE# VCC3 RSV1 GND RSV2 1.5V CLKREQ# UIM_PWR GND UIM_DATA NC(REFCLK-) UIM_CLK NC(REFCLK+) UIM_RST GND UIM_VPP RSV3
PIN 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
Pin Name GND 1.5V GND SMB_CLK NC(PETn) SMB_DATA NC(PETp) GND GND USB_DRSV5 USB_D+ RSV6 GND RSV7 LED_WWAN# RSV8 14
Chapter 3 PIN 18 19 20 21 22 23 24 25 26
Pin Name GND RSV4 W_DISABLE# GND PERST NC(PERn) 3.3VAUX NC(PERp) GND
Board Layout PIN 44 45 46 47 48 49 50 51 52
Embedded and Industrial Computing
Pin Name NC(LED_WLAN#) RSV9 NC(LED_WPAN#) RSV10 1.5V RSV11 GND RSV12 VCC3
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Chapter 4 Chapter 4: Hardware Setup Preparing the Hardware Installation To access some components and perform certain service procedures, you must perform the following procedures first. WARNING: To reduce the risk of personal injury, electric shock, or damage to the equipment, remove the power cord to remove power from the server. The front panel Power On/Standby button does not completely shut off system power. Portions of the power supply and some internal circuitry remain active until AC power is removed. 1. Unpower the LEC-2136 and remove the power cord. 2. Unscrew the 4 rubber feet from the bottom of the LEC2136 System.
Hardware Setup
Note: 1. The
motherboards can support up to 4 GB memory capacity in maximum.
Hard Disk Installation The system can accommodate one Serial-ATA disk. Follow these steps to install a hard disk into the LEC-2136: 1. Align the hard disk with the mounting holes on the chassis cover. 2. Secure the hard disk with 4 mounting screws on the cover from the outside. 3. Connect the Serial-ATA cable to the hard disk. 4. Plug the Serial-ATA cable to the Serial-ATA drive and power connectors on the main board. 5. Put the hard disk tray with the installed hard disk back to the system and secure it with the mounting screws. 1
3. Open the cover upwards.
System Memory Installation The motherboard supports DDR3 memory. It comes with one Double Data Rate type three (DDR3) Small Outline Dual Inline Memory Modules (SO-DIMM) sockets. 1. Align the SO-DIMM connector key with the SO-DIMM socket key.
2
2. Install the SO-DIMM.
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Chapter 4
Hardware Setup
CompactFlash Card Installation
SIM Card
LEC-2136 provides one CompactFlash slot. To install the CF card, follow these procedures bellow for installing a CompactFlash card.
Close
1. Align CompactFlash card and the card slot with the arrow pointing toward the connector.
Open
2. Push the card to insert into the connector.
Note:
1. To remove the Mini-PCIe module from the
system, release the latch first by slightly bending it inward. 2. To remove the SIM card, unlock the tray first by sliding it outward.
3G SIM Card Installation 1. Open the SIM tray and flip it diagonally. 2. Align the angled corner of the SIM card with the key of the SIM card socket. Make sure the ICs is in contact with the reader. 3. Insert the SIM card into the tray diagonally. Close and lock the tray.
3G Wireless Module Installation 1. Align the wireless module’s key with the Mini-PCIe slot notch. 2. Insert the wireless module into the connector diagonally. 3. Push the other end of the wireless module to be tightened with the latch. 3G Wireless module
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Chapter 4
Hardware Setup
Wall Mounting The product ships with wall mounting kit. To mount your product on the wall, follow the instructions below: 1. First make a hole for the anchor in the surface on the wall. 2. Then press the anchor into the hole until it is flush with the surface. You may need a hammer to tap the wall anchor. 3. Use a screwdriver to screw the threaded screw into the plastic anchor. 4. Attach the wall mounting bracket to the back of the device, securing it in place with four of the flat-head screws provided. 5. Hang the device on the wall. Unit: mm
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Appendix A Appendix A: Programming Watchdog Timer A watchdog timer is a piece of hardware that can be used to automatically detect system anomalies and reset the system (or one pair of network ports in bypassed state; However, only one function can be activated at a time.) in case there are any problems. Generally speaking, a watchdog timer is based on a counter that counts down from an initial value to zero. The software selects the counter’s initial value and periodically restarts it. Should the counter reach zero before the software restarts it, the software is presumed to be malfunctioning and the processor’s reset signal is asserted. Thus, the processor will be restarted as if a human operator had cycled the power. For sample watchdog code, see wd_bp folder under Driver and Utility on the Driver and Manual CD
Programming Watchdog Timer 2. Set the access mode with these two parameters by editing the Makefile.linux directly: DIRECT_IO_ ACCESS= [0|1] (enter either 1 or 0) and LANNER_ DRIVER= [0|1] (enter either 1 or 0). 1 is for direct access and no driver is needed. You will only need to execute the program directly. However, when it equaled to 0, driver installation is needed. Refer to the following Install section for more details. 3. Type make to build source code: make Makefile (Note: omit the file extensions) After compiled, the executable program (bpwd_tst) and the driver (bpwd_drv.ko) will be in the bin subdirectory. Install on the Linux and FreeBSD The installation procedures depend on the access mode that you have set by using the above mentioned method. If you have set DIRECT_IO_ACCESS=1, driver installation is not necessary. Proceed to the next section on executing If you have set DIRECT_IO_ACCESS=0, Lanner bypass driver needs to be installed. Install the driver and create a node in the /dev directory as shown in the following example: For Linux:
Executing the commands through the Command Line: 1. wd_tst --swtsr (Set Watchdog Timeout State to Reset) 2. wd_tst --swt xxx (Set Watchdog Timer 1-255 seconds) 3. wd_tst[*] --start (Start Watchdog Timer) 4. wd_tst --stop (Stop Watchdog Timer) The following procedures are required for running the watchdog program on DOS, Linux and FreeBSD. Note: 1. For DOS environment, use DJGPP as compiler
and the makefile: Makefile.dos. 2. For Linux, support kernel versions are 2.4.x and 2.6.x. Use the makefile:Makefile.linux. 3. For FreeBSD, support version is FreeBSD 8.0. Use the makefile: Makefile.
Insert module and create node in /dev as below example: #insmod wd_drv.[k]o #mknod /dev/wd_drv c 241 0 For FreeBSD: Insert module as below example: #kldload -v ./wd_drv.ko Execute # wd_tst --swtsb (Set Watchdog Timeout State to Bypass function) # wd_tst --swtsr (Set Watchdog Timeout State to Reset function) # wd_tst --swt xxx (Set Watchdog Timer 1-255 seconds)
Build
# wd_tst[*] --start (Start Watchdog Timer)
To build program source code on Linux platform, use the following steps as a guideline:
# wd_tst --stop (Stop Watchdog Timer) Note:
1. Copy the proper makefile from the Driver and Manual CD to your system Embedded and Industrial Computing
1.
wd_tst --start will not be available if 19
Appendix A
2.
3.
Programming Watchdog Timer
DIRECT_IO_ACCESS=1, use the command: “./ wd_tst --swt xxx” to start the watchdog timer instead . Watchdog timer can support two functions, - system rest or LAN bypass. However, only one function can be activated at a time. You should modify the code or switch it to the desired state/function accordingly. For more details, refer to the README file
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