D-Series Syringe Pumps - Isco

D Series Syringe Pumps
Section 6 Serial Interface
Table 6-3 Example of C program to demonstrate
conversion of pump commands to DASNET frames
#include
#include
#include "b:comm.c" /* edit to path needed */
/* a ’C’ example of DASNET serial control */
int conv_das();
unsigned char in[256],out[256],buf[256];
char unitnum;
main()
{
unsigned port;
int speed;
cputs("ENTER UNIT ID="); /* get parms */
scanf("%d",&unitnum);
cputs("ENTER COM PORT=");
scanf("%d",&port);
cputs("ENTER BAUD RATE=");
scanf("%d",&speed);
comm_open(port,speed); /* open comm port */
in[0]=50;
cputs("ALL ENTRIES IN CAPS\n\r");
while(1)
cputs("\n\rENTER STRING(Q TO QUIT) >>>");
cgets(in);
if(in[2]==’Q’) break;
conv_das(&in[2],out); /* convert string */
cputs("\nDASNET FORMATTED OUTPUT >>>");
puts(out); /* output converted string */
comm_putc(0x0d); /* send "CR" to serial port */
dput(out); /* output converted string to serial port */
comm_putc(0x0d); /* end with a "CR" */
dgets(buf); /* get response */
cputs("\nDASNET RESPONSE >>>");
puts(buf); /* output response */
comm_flush(); /* flush serial buffer to start again */
}
comm_close();
}
/* dasnet conversion utility */
conv_das(char *in, char *out)
{
unsigned sum;
char *c_ptr;
c_ptr=out; /* point to output */
*out++=unitnum+0x30; /* put id first */
*out++=’R’; /* add "R" to output */
if (!strcmp(in,"R")) /* if just "R" add space to string */
{
*out++=’ ’;
*out++=0x00;
}
else /* add # char to string */
sprintf(out,"%3.3X%s",strlen(in),in);
for (sum=0 ; *c_ptr; c_ptr++) /* add all chars together */
sum+=*c_ptr;
sum=(0x100 - sum) & 0x0FF; /* get check sum */
sprintf(c_ptr,"%2.2X",sum); /* insert into string */
}
Note: Polling is part of the DASNET definition but is not required and is not shown in this example. This code was
written in TC, version 4.5.
6-5