B&B Electronics ADAM-4521 - Manual - Manual (Page 6)

Example Program
This demo program demonstrates how you might send a string of data to your HP34401A Multimeter (RS-232
device) via the ADAM-4521.
ADAM-4521 Configuration Status:
ADDRESS:02
MODE:ADDRESSABLE
DELIMITER: {
ADD(CR):NO
RS-485 baud(9600),N,8,1
RS-232 baud(9600),N,8,2
HP34401A RS-232 baud(9600),N,8,2
P C
(RS-232) (RS-485)
(RS-232) (RS-485)
DATA-
8
C O M 1 AM- 4521 3 RX
7
HP-34401A
Program: DEMO01.C
#include
#include
#include
#include
#define TIME_OUT
500000
static
static
static
int base0=0x3F8;
char rec[36];
char cmd[40];
void
void send(void);
receive(void);
void main()
{
outp(base0+3,0x80); /* set DLAB=1 */
outp(base0 ,0x0C); outp(base0+1,0x00); /* set buad=9600 */
outp(base0+3,0x03);
outp(base0+1,0x00);
printf("\nInput string : ");
gets(cmd);
while (cmd[0] != 'q' && cmd[0] != 'Q')
{
send();
receive();
printf("\nInput string : ");
gets(cmd);
}
/* set data=8 stop=1 no parity */
/* disable COM1 interrupt */
}
ADAM-4521 User's Manual
2 TX
5 GND
2 RX
3 TX
5 GND
DATA-
A D
DATA+
.
DATA+