To Write Programs That Open \Systern\Prograrn - HP 1670A Series User Manual

Example
Programming the Logic Analyzer
To write programs that open \sys tern \program
Programming the logic analyer within a C program
The following example in C opens the \system\program file and sends
several commands and queries.
#include <stdio.h>
#include <unistd.h>
#define STR_LEN 80
void putstr(FILE *file, char *str)
{
fwrite(str, strlen(str), 1, file);
int getstr(FILE *file, char *str)
return(fread(str, 1, STR_LEN, file));
void main()
{
FILE *file;
int num;
char receive_str[STR_LENJ;
/* Send a query and retrieve and print the response */
file = fopen ("/logic/system/program", "r");
while (getstr(file, receive_str) == 0);
fclose (file);
file= fopen("/logic/system/program", "w");
putstr(file, "*idn?\n");
fclose (file);
sleep(l);
file= fopen("/logic/system/program", "r");
while (getstr(file, receive_str) == 0);
fclose (file);
printf("%s\n", receive_str);
/* Send command strings to the logic analyzer */
file= fopen("/logic/system/program", "w");
putstr(file, "*rst\n");
putstr(file, ":sel 1\n");
5-10