Advantech Network Card ADAM 4500 User Manual

ADAM-4500  
PC-based Communication  
Controller  
User's Manual  
Copyright  
Notice  
This document is copyrighted, 1997, by Advantech Co., Ltd. All rights are reserved. Advantech  
Co., Ltd. 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 Advantech Co., Ltd. Information provided in this  
manual is intended to be accurate and reliable. However, Advantech Co., Ltd. assumes no  
responsibility for its use, nor for any infringements upon the rights of third parties which may  
result from its use.  
Acknowledgments  
ADAM is a trademark of Advantech Co., Ltd.  
IBM and PC are trademarks of International Business Machines Corporation.  
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Chapter 3 Programming and Downloading  
1
1
3.1 Programming  
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Mini BIOS functions  
1
Converting Program Codes  
1
Other limitations  
2
Programming the Watchdog timer  
2
Interrupt types  
3
Memory Mapping  
3
3.2 Downloading and transferring  
4
Install Utility Software on Host PC  
4
Preparing the ALLFILE directory  
4
Downloading into flash ROM  
4
Transferring files to SRAM  
6
3.3 Steps to Building a Successful Application  
6
Step 1:Write and simulate control logic on a PC  
6
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Step 2:Connect the cables  
1
1
1
6
Step 3:Convert and download codes to flash ROM  
7
Step 4:Power on ADAM-4500 to complete the application  
7
Chapter 4 Function Library  
1
3
8
Appendix A Register Structure  
0
Appendix B Safety Instructions  
32  
Chapter 1 General Information  
1.1 Introduction  
The ADAM-4500 is a fully functional standalone controller, designed for industrial automation and  
control, enclosed in a small package. It provides an ideal means of producing an IBM PC  
compatible hardware platform.  
Emulating Open PC environments  
The module is much like a compact computer, and includes an 80188 CPU, 256 KB Flash ROM,  
256 KB SRAM, COM1, COM2, and a program download port. Its built-in ROM-DOS is an MS-  
DOS equivalent operating system, which provides all of the basic functions of MS-DOS except for  
BIOS. A user can run standard PC software and application programs, written in high level  
languages such as C or C++, within the ROM-DOS environment. Moreover, the module also  
provides free ROM memory for application downloading and free RAM memory for application  
operation.  
Built-in RS-232/RS-485 Communication Ports  
The ADAM-4500 has two communication ports to let the controller easily communicate with the  
other devices in your application. The COM1 port can be configured as an RS-232 or an RS-485  
communication interface via the jumper setting. The COM2 port is dedicated as an RS-485 port.  
This unique design makes the controller suitable for use in a variety of applications.  
Built-in Real-time Clock and Watchdog Timer  
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The controller also includes a real-time clock and a watchdog timer function. The real-time clock  
ensures time recording while events occur. The watchdog timer is designed to automatically reset  
the microprocessor when the system fails. This feature greatly reduces the level of maintenance  
required and makes the ADAM-4500 ideal for use in applications that require a high level of  
system stability.  
1.2 Features  
?? Built-in boot ROM-DOS to run PC programs  
?? Free ROM/RAM memory for user's applications  
?? 2-wire, multi-drop RS-485 networking  
?? Communication speed up to 115.2 Kbps  
?? RS-232/RS-485 modes (jumper selectable)  
?? Automatic data flow control in RS-485 mode  
?? Built-in real-time clock and watchdog timer  
?? Easy mounting on a DIN-rail or panel  
?? Program download cable and utility included  
1.3 Specifications  
System  
?? CPU: 80188-40  
?? Flash ROM: 256 KB (170 KB free memory for users)  
?? Operating system: Boot ROM-DOS  
?? SRAM: 256 KB ( 234 KB free memory for users)  
?? Timer BIOS: Yes  
?? Real-time clock: Yes  
?? Watchdog timer: Yes  
?? COM1: RS-232/RS-485  
?? COM2: RS-485  
?? Program download port (RS-232): Tx, Rx, GND  
RS-232 Interface  
?? Signals: TxD, RxD, RTS, CTS, DTR, DSR, DCD, RI, GND  
?? Mode: Asynchronous full duplex, point to point  
?? Connector: DB-9 pin  
?? Transmission speed: up to 115.2 Kbps  
?? Max transmission distance: 50 feet (15.2 m)  
RS-485 Interface  
?? Signals: DATA+, DATA-  
?? Mode: Half-duplex, multi-drop  
?? Connector: Plug-in terminal block  
?? Transmission speed: up to 115.2 Kbps  
?? Max transmission distance: 1220 m (4000 feet)  
Power  
?? Unregulated +10 to +30 VDC  
?? Protected against power reversal  
?? Power consumption: 2.0 W  
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Mechanical  
?? Case: ABS with captive mounting hardware  
?? Plug-in screw terminal block:  
2
2
Accepts 0.5 mm to 2.5 mm , 1 - #12 or 2 - #14 to #22 AWG  
Environment  
?? Operating temperature: -10 to 70°C (14 to 158°F)  
?? Storage temperature: -25 to 70°C (-13 to 158°F)  
?? Humidity: 5 to 95 %, non-condensing  
1.4 System Diagram  
ADAM-4500  
Figure 1-1: ADAM-4500 Diagram  
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Function Block Diagram  
SRAM  
RS232/485  
Tranceiver  
COM#1  
UART  
16 Bit  
up  
FLASH ROM  
RTC  
RS-485  
Tranceiver  
COM#2  
UART  
Programming  
Port  
Tranceiver  
WDT&Reset  
Power  
Converter  
+10V to 30Vdc  
Figure 1-2: ADAM-4500 Function Block Diagram  
Chapter 2 Installation Guidelines  
This chapter provides guidelines to set up and install the ADAM-4500 communication controller.  
A simplified hookup scheme is provided that lets you configure a successful system off-line  
before implementing it in your application.  
2.1 System Requirements to Setup ADAM-4500  
The following list gives an overview of what is needed to setup, install and configure an ADAM-  
4500 system.  
?? ADAM-4500 module  
?? An IBM PC/AT compatible computer that can download programs with an RS-232 port.  
?? Power supply for the ADAM-4500 (+10 to + 30 VDC  
)
?? ADAM-4500 download utility software  
?? Download cable (RS-232 interface)  
Host computer  
Any computer that is IBM PC/AT compatible which can run and write programs in an MS-DOS  
environment, and provides an RS-232 communication port to allow users to download programs  
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into the ADAM-4500, can function as the host computer.  
Power supply  
For ease of use in industrial environments, the ADAM-4500 will accept industry standard +24 VDC  
unregulated power. The ADAM-4500 was designed to operate using any power supply voltage  
between +10 and +30 VDC. Power ripples must be limited to 5 V peak to peak while the voltage in  
all cases must be maintained between +10 and +30 VDC  
.
Utility software  
A disk containing menu-driven utility software is provided with ADAM-4500 to help users to  
download programs to the ADAM-4500. The ADAM-4500 utility software is executed in an MS-  
DOS or compatible environment.  
Download cable  
A customized download cable is included. A user can connect it between the COM port of a host  
computer and the download port of the ADAM-4500 for downloading programs.  
2.2 Steps to Successfully Setup the System  
Step 1: Review the requirements  
Before you power on the ADAM-4500, make sure you have a host computer, a power supply, and  
the utility software and download cable.  
Step 2: Wiring the power cables and download cable  
Connect the power cable between the power supply and the ADAM-4500. Make sure the power  
source is between +10 and +30 VDC  
.
Figure 2-1: Power Supply Connections  
We advise use of the following standard colors (as indicated on the ADAM-4500) for the power  
cables:  
+Vs (R)  
GND (B)  
Red  
Black  
Connect the download cable between the host computer and the ADAM-4500. A customized  
download cable is provided with the ADAM-4500, which includes a DB-9 pin connector for the  
connection to the host computer, and three color-coded wires for connection to the ADAM-4500  
terminal block. The following figure shows how to connect the ADAM-4500 to the host computer.  
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HOST PC  
DOWNLOAD CABLE and ADAM-4500  
RS-232  
RS-232  
Red  
White  
Black  
Host PC  
Female  
DB-9  
Male DB-9  
Figure 2-2: Download Cable Connections  
Step 3: Run utility software in host computer  
Together with the ADAM-4500 you will find a utility disk containing an ADAM4500.EXE file. This  
file is a menu-driven software utility provided for downloading user's programs. It uses a screen  
simulating operation of the ADAM-4500 communication controller. When the file is executed, the  
main screen appears, as shown in figure 2.3.  
Figure 2-3: Main Screen  
Setup COM port  
First, highlight the "COMport" option on the top bar and press <enter>. The status field (shown  
below) will appear. Second, highlight the COM port you used to connect the ADAM-4500 to the  
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PC, then press <enter>. The Baudrate is set to a default value of 57600 bps and cannot be  
changed. The screen is as shown in figure 2.4.  
Figure 2-4: Select Communication Port  
Step 4: Power on ADAM-4500  
Highlight the "Terminal" option, then press <enter>. Power on the ADAM-4500. After 5 seconds,  
the screen shown in figure 2.5 will appear. The ADAM-4500 system is successfully started up.  
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Figure 2-5: Emulating Screen of ADAM-4500  
2.3 Jumper Setting  
We designed the ADAM-4500 with ease-of-use in mind. It has three jumper settings. The  
following sections explain how to configure the module. You may want to refer to the figure below  
for help in identifying card components.  
The following diagram shows the locations of the jumpers:  
Figure 2-6:Jumper Layout  
COM1 Port Setting (JP1)  
Jumper JP1 lets you configure the COM1(3F8) port as an RS-232 or as an RS-485 interface for  
different applications. Jumper settings are shown below:  
Watchdog Timer Setting (JP2)  
Jumper JP2 lets you configure the watchdog timer in disable mode, reset mode or NMI (Non-  
maskable interrupt) mode.  
NMI  
RESET  
JP2  
NMI  
RESET  
JP2  
NMI  
RESET  
JP2  
Reset Mode  
Non-maskable  
Interrupt (NMI)  
Disable Watchdog Timer  
(Default)  
Reset Function Setting (JP3)  
Jumper JP3 enables or disables the function of the reset pin, as shown below:  
2.4 Communication Wiring  
The ADAM-4500 offers two serial ports: COM1(3F8) in RS-232 or RS-485, and COM2 (2F8) in  
RS-485. COM1 can be configured as an RS-232 or as an RS-485 interface via the jumper setting.  
This provides flexibility for communications between the controller and other devices in your  
application.  
RS-232 Connection  
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The ADAM-4500 has a DB-9 pin connector as its RS-232 port connector. Since the connection  
for an RS-232 interface is not standardized, different devices implement the RS-232 connection  
in different ways. If you are having problems with a serial device, be sure to check the pin  
assignments for the connector. The following table shows the pin assignments for the ADAM-  
4500's RS-232 port.  
Pin No. Description  
1
2
3
4
5
6
7
8
9
DCD  
RxD  
TxD  
DTR  
GND  
DSR  
RTS  
CTS  
RI  
Table 2-1: Pin Assignments of RS-232 Port  
RS-485 Connection  
The RS-485 standard supports half-duplex communication. This means that just two wires are  
needed to both transmit and receive data. Handshaking signals (such as RTS, Request To Send)  
are normally used to control the direction of the data flow. A special I/O circuit in the ADAM-4500  
automatically senses the direction of the data flow and switches the transmission direction. No  
handshaking signals are necessary. This RS-485 control is completely transparent to the user.  
We recommend that shielded twisted-pair cables complying with the EIA RS-485 standard be  
used in the network to reduce interference. Only one set of twisted-pair cables is required to  
transmit both Data and RTS signals. We advise use of the following standard colors for the  
communication cables.  
DATA +  
DATA -  
Yellow  
Green  
Chapter 3 Programming and Downloading  
This chapter explains how to program applications and download programs into the ADAM-4500  
controller. Additionally, it points out limitations and concerns of which you should be aware.  
3.1 Programming  
The operating system of ADAM-4500 is ROM-DOS, an MS-DOS equivalent system. It allows  
users to run application programs written in assembly language as well as high level languages  
such as C or C++. However, there are limitations when running application programs in the  
ADAM-4500. In order to build successful applications, you should keep the following limitations  
and concerns in mind.  
Mini BIOS Functions  
The ADAM-4500 provides only two serial communication ports for connecting peripherals, so the  
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mini BIOS of ADAM-4500 only provides 10 function calls. Since the user's program can not use  
other BIOS function calls, the ADAM-4500 may not work as intended. Additionally, certain  
language compilers such as QBASIC directly call BIOS functions that are not executable in  
ADAM-4500. The ADAM-4500 mini BIOS function calls are listed in the following table.  
Function  
07h  
10h  
Subfunction  
0eh  
Task  
186 or greater co-processor esc instruct  
TTY Clear output  
11h  
Get equipment  
12h  
15h  
Get memory size  
Extended memory read  
Extended memory size  
PS/2 or AT style A20 Gate table  
Read TTY char  
87h  
88h  
c0h  
0
16h  
1
Get TTY status  
2
Get TTY flags  
18h  
19h  
1ah  
Print "Failed to BOOT ROM-DOS" message  
Reboot system  
Get tick count  
Set tick count  
Get real time clock  
Set real time clock  
Get date  
0
1
2
3
4
5
Set date  
1ch  
Timer tick  
Converting Program Codes  
The ADAM-4500 has an 80188 CPU. Therefore, programs downloaded into its flash ROM must  
first be converted into 80186 or 80188 compatible code, and the floating point operation must be  
set to emulation mode. For example, if you were to develop your application program in Borland  
C, you would compile the program as indicated in the screen below.  
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Figure 3-1: Converting Program Codes  
Other Limitations  
1. The ADAM-4500 does not support the standard PC function "8253". Therefore, the C language  
function call "delay ( )" cannot be used in ADAM-4500 applications.  
2. Certain critical files are always kept in flash ROM, such as the operating system files, BIOS,  
and monitoring files. Aside from the storage space needed for these critical files, the ADAM-4500  
has an additional 170 KB of free ROM space for downloading user applications. An additional  
free 234 KB of SRAM is provided for operation of applications.  
Programming the Watchdog Timer  
The ADAM-4500 is equipped with a watchdog timer function that resets the CPU or generates an  
interrupt if processing comes to a standstill for any reason. This feature increases system  
reliability in industrial standalone and unmanned environments.  
If you decide to use the watchdog timer, you must write a function call to enable it. When the  
watchdog timer is enabled, it must be cleared by the application program at intervals of less than  
1.6 seconds. If it is not cleared at the required time intervals, it will activate and reset the CPU, or  
generate an NMI (Non-maskable interrupt). You can use a function call in your application  
program to clear the watchdog timer. At the end of your program, you need an additional function  
call to disable the watchdog timer.  
The following program shows how you might program the watchdog timer in C programs:  
Example:  
main ()  
{
wdt_enable();  
/* enable ADAM-4500 WDT function */  
/* user's function block */  
{
.
.
wdt_clear();  
/* clear WDT timer */  
.
.
}
wdt_disable();  
/* disable ADAM-4500 WDT function */  
}
Interrupt Types  
Three types of interrupts may occur in the ADAM-4500. The following table shows the types of  
interrupts.  
Interrupt Name  
Interrupt Type  
Non-Maskable Interrupt (NMI)  
COM1 Interrupt  
COM2 Interrupt  
02h  
0Ch  
0Eh  
Memory Mapping  
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The following table shows the memory mapping of the ADAM-4500 controller.  
0xF8000 -- 0xFFFFF  
0xF6C00 -- 0xF7FFF  
0xCC000  
Monitor program  
Mini BIOS  
Start of Application ROM Disk (about 171 K)  
0xC0000  
Start of ROM-DOS (about 48 K)  
No Use  
SRAM area  
System area  
COM1  
COM2  
0x40000 -- 0xBFFFF  
0x00400 -- 0x3FFFF  
0x00000 -- 0x003FF  
0x003F8 -- 0x003FF  
0x002F8 -- 0x002FF  
0x00070 -- 0x00071  
Real time clock  
3.2 Downloading and Transferring  
This section explains how to download application programs from a PC into the ADAM-4500 flash  
ROM and how to transfer files from a PC into ADAM-4500's SRAM.  
Install Utility Software on Host PC  
A utility disk containing the following files and directories is included with each ADAM-4500.  
. ALLFILE  
. LIBRARY  
. EXAMPLE  
<DIR>  
<DIR>  
<DIR>  
. ADAMMINI.HEX  
. ADAM_DEM.HEX  
. ROM-DOS.HEX  
. DEMO-DIS.HEX  
. ADAMMINI.BAT  
. ADAM4500.EXE  
. HEXCAT.EXE  
. ROMDISK.EXE  
Copy all the files and directories on the utility disk to the host computer hard drive.  
Preparing the ALLFILE directory  
Applications programs are downloaded from a host-PC to the flash ROM of the ADAM-4500  
using the ADAM-4500 utility software. The ADAM-4500 utility software is first installed on a host-  
PC. The directory ALLFILE will be included among the contents copied from the utility software  
disk to the host-PC hard drive. The user must then load into ALLFILE the following required files:  
The application program intended for installation in ADAM-4500; COMMAND.COM;  
AUTOEXEC.BAT; and CONFIG.SYS. The user should make certain that AUTOEXEC.BAT  
contains the name of the user's application program so that the application will automatically  
begin executing whenever the ADAM-4500 is powered on. When downloading to the ADAM-  
4500's flash ROM, the utility software first clears all non-permanent files from the flash ROM, then  
installs all the files contained in directory ALLFILE into the flash ROM. It is therefore critical that  
all the required files be available in directory ALLFILE when the utility software tries to install  
ALLFILE's contents on the ADAM-4500's flash ROM.  
Downloading into flash ROM (ADAM-4500's C-drive)  
With the ADAM-4500 utility software and the directory ALLFILE, loaded with its proper contents,  
installed on the host-PC, you can execute the utility software. After the utility software has begun  
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executing, select the COMport of the host PC that has been connected to ADAM-4500. Then  
select "Program" from the bar menu and press <enter> to begin downloading. The screen shown  
in figure 3-2 will appear.  
Figure 3-2: Program downloading  
Follow the instructions shown on the screen. Power off the ADAM-4500 and then re-power on.  
Then press any key within 7 seconds to burn the files contained in ALLFILE into the ADAM-  
4500's flash ROM. After the files are successfully burned into the flash ROM, the screen in Figure  
3-3 will appear. Power off and power on the ADAM-4500 once again. The ADAM-4500 controller  
will automatically execute the application program.  
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Figure 3-3: Download Complete  
Transferring files to SRAM (ADAM-4500's D-drive)  
The ADAM-4500 provides 234 KB of free SRAM for use in program operation, and as working  
memory space in the event you want to test your system control logic or simulate system  
performance before downloading the execution code to the flash ROM. You can transfer files  
from a host-PC to the ADAM-4500's SRAM (D drive). Execute the utility software, select terminal  
mode, and press Alt-T. File transfer will begin and the screen shown in figure 3-4 will appear.  
Figure 3-4: File Transferring  
Key in the specific directory and file names you want to transfer. Press <enter> to complete the  
file transfer. You can check the files in D drive.  
We recommend that users test new applications on their host PC before installing them in the  
ADAM-4500. However, the performance of the host PC may differ greatly from that of the ADAM-  
4500. Therefore, users may find it desirable to install an application that has been tested on the  
host PC into ADAM-4500's D drive for testing prior to burning it into the flash ROM. It takes less  
time to alter and reinstall a program into the SRAM than into the flash ROM, so using the SRAM  
during debugging on the ADAM-4500 may be more efficient.  
3.3 Steps to Building a Successful Application  
Step 1: Write and simulate control logic on a PC  
Connect a host-PC to the I/O device network you want to control. Write the control logic for your  
application on the host-PC and execute the application on the PC to verify that it works properly.  
Step 2: Connect the cables  
Replace the host-PC in the control network with the ADAM-4500 and reconnect the proper power  
and communications cable in the network to the ADAM-4500. Connect the download cable  
between the host-PC and the ADAM-4500.  
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Step 3: Convert and download codes to flash ROM  
Within the host computer, convert the application program into 80186 or 80188 compatible code.  
Create an AUTOEXEC.BAT file for the application program and write the application program's  
name in the AUTOEXEC.BAT file. Also create COMMAND.COM and CONFIG.SYS files for the  
application program. Load the ADAM-4500 utility software into the host-PC. Load the converted  
application program and the files AUTOEXEC.BAT, COMMAND.COM, and CONFIG.SYS into  
directory ALLFILE. Execute the utility software to download the contents of ALLFILE into the  
ADAM-4500 flash ROM.  
Step 4: Power on ADAM-4500 to complete the application  
After all the files in directory ALLFILE have been completely transferred to the flash ROM, re-  
power on the ADAM-4500.  
Chapter 4 Function Library  
The ADAM-4500 is packaged with a utility disk that contains a directory called LIBRARY. This  
directory contains a number of function calls that enable a user to efficiently write applications for  
ADAM-4500. The library supports both Turbo C 2.0 and Microsoft C 6.0 version programming  
languages.  
The "LIBRARY" directory contains the following two sub-directories:  
. TC20  
Library for Turbo C 2.0 version  
. MSC60  
Library for Microsoft C 6.0 version  
Function Library for Turbo C  
The TC20 directory contains the following files:  
ADAM4500.H  
4500L.LIB  
4500S.LIB  
Declaration file  
Library file for compiling large mode  
Library file for compiling small mode  
Function Library for Microsoft C  
The MSC60 directory contains the following files:  
ADAM4500.H  
4500L.LIB  
4500C.LIB  
4500M.LIB  
4500S.LIB  
Declaration file  
Library file for compiler large mode  
Library file for compiler compact mode  
Library file for compiler medium mode  
Library file for compiler small mode  
The function calls included in the directory LIBRARY are described in the following pages.  
comm_init  
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Syntax:  
int comm_init(int buf_size)  
Function description:  
Initializes the communication port and interrupt routine before other function calls use the  
communication port.  
Parameter  
Description  
int buf_size  
Sets the buffer size of every communication port for storage of  
received  
data. The unit of size is bytes.  
Return:  
Returns a 1 if command succeeds. Returns a 0 if it fails.  
comm_exit  
Syntax:  
int comm_exit()  
Function Description:  
If a user calls the comm_init function, the user must call this function to release the  
communication port before the user's program terminates.  
Return:  
Returns a 1 if command succeeds. Return a 0 if it fails.  
comm_open  
Syntax:  
int comm_open(unsigned char port, unsigned long baud, int parity, int data, int stop, int  
cmd_type)  
Function Description:  
To open a communication port for user to send and receive data.  
Parameter  
Description  
unsigned char port  
Specifies communication port.  
1: COM1 port  
2: COM2 port  
unsigned long baud  
Baud rate setting. The eight allowable baud rates are: 1200,  
2400, 4800, 9600, 19200, 38400, 57600, and 115200. Sized in bps  
(bits per second).  
int parity  
int data  
Parity setting.  
0: no parity, 1: odd, 2: even  
Data bits setting. There are four allowable data lengths: 8, 7, 6,  
and 5.  
Sized in bit units.  
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int stop  
Stop bits setting  
1, 2  
(stop bit = 1 is for data bits = 5,6,7, or 8)  
(stop bit = 2 is for data bits = 6,7, or 8)  
For details, refer to RS-232 chip set data book  
int cmd_type  
Return:  
Received data format setting.  
0: single byte mode. The data format is a single byte character.  
User can use comm_get_rec_datas to receive single byte data.  
1: command mode. The data format is a string. User can use  
comm_get_rec_str to receive string data.  
Returns a 1 if command succeeds. Returns a 0 if it fails.  
comm_send  
Syntax:  
int comm_send(unsigned char c, unsigned char port)  
Function Description:  
To send a character to a specified communication port.  
Parameter  
Description  
unsigned char c  
Represents character to be sent.  
unsigned char port  
Specifies communication port to which character is sent (COM1  
or  
COM2)  
1: COM1 port  
2: COM2 port  
Return:  
Returns a 1 if command succeeds. Returns a 0 if it fails.  
comm_get_rec_datas  
Syntax:  
int comm_get_rec_datas(unsigned *length, unsigned char **data, unsigned char port)  
Function Description :  
The function is called to receive a single byte of data. The function call returns a success flag if  
the communication port receives any data. The function call returns a failed flag if the buffer of the  
communication port is empty. The length of the data packet received (in bytes) is stored in  
parameter "length". The contents of the data packet received are stored in parameter "data".  
Parameter  
Description  
unsigned *length  
Returns the length of the received data  
unsigned char **data  
Returns the received data contents. User must first allocate a  
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data buffer ( Use comm_int function call ). Before exiting  
program, user must free this buffer ( Use comm_exit function  
call ).  
unsigned char port  
Specifies communication port (COM1 or COM2)  
1: COM1 port  
2: COM2 port  
Return:  
Returns a 1 if command succeeds. Returns a 0 if it fails.  
comm_get_rec_str  
Syntax:  
int comm_get_rec_str(unsigned char **data, unsigned char port)  
Function Description:  
This function call is employed to received string data. The function call returns a success flag if  
the communication port receives string data ( terminal character is 0x0d) . The function call  
returns a fail flag if the buffer of the communication port is empty.  
Parameter  
Description  
unsigned char **data  
Returns the received string contents. User must first allocate a  
data buffer (Use comm_int function call). Before exiting  
program, user  
call).  
must free this buffer (Use comm_exit function  
unsigned char port  
Specifies communication port (COM1 or COM2)  
1: COM1 port  
2: COM2 port  
Return:  
Returns a 1 if command succeeds. Returns a 0 if it fails.  
led_init  
Syntax:  
void led_init()  
Function Description:  
This function must be called to initialize the ADAM-4500's LED before a user's program can  
control the LED.  
led  
Syntax:  
void led(int type)  
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Function Description:  
LED ON/OFF control  
Parameter  
int type  
Description  
0: LED OFF  
1: LED ON  
wdt_enable  
Syntax:  
wdt_enable()  
Function Description:  
This function enables the watchdog timer function. After a user calls this function, the user must  
call the wdt_clear() function to refresh the watchdog timer; otherwise the CPU resets, or a non-  
maskable interrupt is generated.  
wdt_clear  
Syntax:  
wdt_clear()  
Function Description:  
This function refreshes the watchdog timer, thereby avoiding the resetting of the CPU or the  
generation of a non-maskable interrupt.  
wdt_disable  
Syntax:  
wdt_disable()  
Function Description:  
This function disables the watchdog timer function.  
Appendix A Register Structure  
This appendix gives a short description of each of the ADAM-4500's registers. For more  
information please refer to the data book for the STARTECH 16C550 UART chip.  
All registers are one byte in length. Bit 0 is the least significant bit, and bit 7 is the most significant  
bit. The address of each register is specified as an offset from the port base address (BASE),  
COM1 is 3F8h and COM2 is 2F8h.  
DLAB is the "Divisor Latch Access Bit", bit 7 of BASE+3.  
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BASE+0  
BASE+0  
BASE+0  
BASE+1  
Receiver buffer register when DLAB=0 and the operation is a read.  
Transmitter holding register when DLAB=0 and the operation is a write.  
Divisor latch bits 0 - 7 when DLAB=1  
Divisor latch bits 8-15 when DLAB=1.  
The two bytes BASE+0 and BASE+1 together form a 16-bit number, the divisor, which  
determines the baud rate. Set the divisor as follows:  
Baud rate  
50  
75  
110  
133.5  
150  
300  
600  
Divisor  
2304  
1536  
1047  
857  
768  
384  
192  
96  
Baud rate  
2400  
3600  
4800  
7200  
Divisor  
48  
32  
24  
16  
12  
6
3
2
1
9600  
19200  
38400  
56000  
115200  
1200  
1800  
2000  
64  
58  
BASE+1  
BASE+2  
Interrupt Status Register (ISR) when DLAB=0  
bit 0  
bit 1  
bit 2  
bit 3  
Enable received-data-available interrupt  
Enable transmitter-holding-register-empty interrupt  
Enable receiver-line-status interrupt  
Enable modem-status interrupt  
FIFO Control Register (FCR)  
bit 0  
Enable transmit and receive FIFOs  
bit 1  
Clear contents of receive FIFO  
bit 2  
bits 6-7  
Clear contents of transmit FIFO  
Set trigger level for receiver FIFO interrupt  
Bit 7  
Bit 6  
FIFO trigger level  
0
0
1
1
0
1
0
1
01  
04  
08  
14  
BASE+3  
Line Control Register (LCR)  
bit 0  
bit 1  
Word length select bit 0  
Word length select bit 1  
Bit 1  
Bit 0  
Word length (bits)  
0
0
1
1
0
1
0
1
5
6
7
8
bit 2  
bit 3  
bit 4  
bit 5  
bit 6  
bit 7  
Number of stop bits  
Parity enable  
Even parity select  
Stick parity  
Set break  
Divisor Latch Access Bit (DLAB)  
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BASE+4  
BASE+5  
Modem Control Register (MCR)  
bit 0  
bit 1  
DTR  
RTS  
Line  
bit 0  
bit 1  
bit 2  
bit 3  
bit 4  
bit 5  
bit 6  
bit 7  
Status Register (LSR)  
Receiver data ready  
Overrun error  
Parity error  
Framing error  
Break interrupt  
Transmitter holding register empty  
Transmitter shift register empty  
At least one parity error, framing error or break indication  
FIFO  
in the  
BASE+6  
Modem Status Register (MSR)  
bit 0  
bit 1  
bit 2  
bit 3  
bit 4  
bit 5  
bit 6  
bit 7  
Delta CTS  
Delta DSR  
Trailing edge ring indicator  
Delta received line signal detect  
CTS  
DSR  
RI  
Received line signal detect  
BASE+7  
Temporary data register  
Appendix B Safety Instructions  
1.Please read these safety instructions carefully.  
2.Please keep this User's Manual for later reference.  
3.Please disconnect this equipment from AC outlet before cleaning. Don't use liquid or sprayed  
detergent for cleaning. Use moisture sheet or cloth for cleaning.  
4.For pluggable equipment, the socket-outlet shall be installed near the equipment and shall be  
easily accessible.  
5.Please keep this equipment from humidity.  
6.Lay this equipment on a reliable surface when install. A drop or fall could cause injury.  
7.The openings on the enclosure are for air convection hence protect the equipment from  
overheating. DO NOT COVER THE OPENINGS.  
8.Make sure the voltage of the power source when connect the equipment to the power outlet.  
9.Place the power cord such a way that people can not step on it. Do not place anything over the  
power cord.  
10.All cautions and warnings on the equipment should be noted.  
11.If the equipment is not used for a long time, disconnect the equipment from mains to avoid  
being damaged by transient overvoltage.  
12.Never pour any liquid into opening, this could cause fire or electrical shock.  
13.Never open the equipment. For safety reason, the equipment should only be opened by  
qualified service personnel.  
14.If one of the following situations arises, get the equipment checked by a service personnel:  
a: The power cord or plug is damaged.  
b. Liquid has penetrated into the equipment.  
c. The equipment has been exposed to moisture.  
d. The equipment does not work well or you can not get it to work according to user's manual.  
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e. The equipment has dropped and damaged.  
f. If the equipment has obvious sign of breakage.  
15.DO NOT LEAVE THIS EQUIPMENT IN AN ENVIRONMENT UNCONDITIONED, STORAGE  
TEMPERATURE BELOW -20° C (-4° F) OR ABOVE 60°C (140°F), IT MAY DAMAGE THE  
EQUIPMENT.  
The sound pressure level at the operators position according to IEC 704-1:1982 is equal to or  
less than 70dB(A).  
DISCLAIMER: This set of instructions is provided according to IEC 704-1. Advantech disclaims  
all responsibility for the accuracy of any statements contained therein.  
Wichtige Sicherheishinweise  
1.  
2.  
3.  
Bitte lesen sie Sich diese Hinweise sorgfältig durch.  
Heben Sie diese Anleitung für den späteren Gebrauch auf.  
Vor jedem Reinigen ist das Gerät vom Stromnetz zu trennen. Verwenden Sie Keine  
Flüssig-oder Aerosolreiniger. Am besten dient ein angefeuchtetes Tuch zur Reinigung.  
4. Die NetzanschluBsteckdose soll nahe dem Gerät angebracht und leicht zugänglich sein.  
5. Das Gerät ist vor Feuchtigkeit zu schützen.  
6. Bei der Aufstellung des Gerätes ist auf sicheren Stand zu achten. Ein Kippen oder Fallen  
könnte Verletzungen hervorrufen.  
7.  
Die Belüftungsöffnungen dienen zur Luftzirkulation die das Gerät vor überhitzung schützt.  
Sorgen Sie dafür, daB diese Öffnungen nicht abgedeckt werden.  
8.  
9.  
Beachten Sie beim AnschluB an das Stromnetz die AnschluBwerte.  
Verlegen Sie die NetzanschluBleitung so, daB niemand darüber fallen kann. Es sollte  
auch nichts auf der Leitung abgestellt werden.  
10.  
11.  
Alle Hinweise und Warnungen die sich am Geräten befinden sind zu beachten.  
Wird das Gerät über einen längeren Zeitraum nicht benutzt, sollten Sie es vom Stromnetz  
trennen. Somit wird im Falle einer Überspannung eine Beschädigung vermieden.  
12. Durch die Lüftungsöffnungen dürfen niemals Gegenstände oder Flüssigkeiten in das  
Gerät gelangen. Dies könnte einen Brand bzw. elektrischen Schlag auslösen.  
13. Öffnen Sie niemals das Gerät. Das Gerät darf aus Gründen der elektrischen Sicherheit  
nur von authorisiertem Servicepersonal geöffnet werden.  
14. Wenn folgende Situationen auftreten ist das Gerät vom Stromnetz zu trennen und von  
einer qualifizierten Servicestelle zu überprüfen:  
a - Netzkabel oder Netzstecker sind beschädigt.  
b - Flüssigkeit ist in das Gerät eingedrungen.  
c - Das Gerät war Feuchtigkeit ausgesetzt.  
d - Wenn das Gerät nicht der Bedienungsanleitung entsprechend funktioni  
Sie mit Hilfe dieser Anleitung keine Verbesserung erzielen.  
e - Das Gerät ist gefallen und/oder das Gehäuse ist beschädigt.  
f - Wenn das Gerät deutliche Anzeichen eines Defektes aufweist.  
ert oder  
Der arbeitsplatzbezogene Schalldruckpegel nach DIN 45 635 Teil 1000 beträgt 70dB(A)  
oder weiger.  
DISCLAIMER: This set of instructions is provided according to IEC704-1.  
Advantech disclaims all responsibility for the accuracy of any statements contained therein.  
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