9Programming Examples
*communication with the computer interrupts data acquisition.
*Setting up the oscilloscope over the bus causes the data
*buffers to be cleared and internal hardware to be reconfigured.
*If a measurement is immediately requested there may not have
*been enough time for the data acquisition process to collect
*data and the results may not be accurate. An error value of
*9.9E+37 may be returned over the bus in this situation.
*/
iprintf(id, ":DIGITIZE CHAN1\n");
}
/*
*analyze
*
*In this example we will do the following:
*- Save the system setup to a file for restoration at a later time.
*- Save the oscilloscope display to a file which can be printed.
*- Make single channel measurements.
*/ |
|
|
void analyze (void) |
|
|
{ |
|
|
double frequency, vpp; | /* Measurements. */ | |
double vdiv, off, sdiv, delay; | /* Calculated from preamble data. */ | |
int i; | /* Loop counter. */ | |
/* Array for setup string. */ |
|
|
unsigned char setup_string[SETUP_STR_SIZE]; | ||
int setup_size; |
|
|
FILE *fp; |
|
|
unsigned char image_data[IMG_SIZE]; | /* Array for image data. */ | |
int img_size; |
|
|
/* SAVE_SYSTEM_SETUP - The :SYSTEM:SETUP? query returns a program
*message that contains the current state of the instrument. Its
*format is a
*#800002204<setup string><NL>
*where the setup string is 2204 bytes in length.
*/
setup_size = SETUP_STR_SIZE;
/* Query and read setup string. */
ipromptf(id, ":SYSTEM:SETUP?\n", "%#b\n", &setup_size, setup_string); printf("Read setup string query (%d bytes).\n", setup_size);
/* Write setup string to file. */
fp = fopen ("c:\\scope\\config\\setup.dat", "wb");
setup_size = fwrite(setup_string, sizeof(unsigned char), setup_size, fp);
fclose (fp);
printf("Wrote setup string (%d bytes) to file.\n", setup_size);
/* RESTORE_SYSTEM_SETUP - Uploads a previously saved setup string
*to the oscilloscope.
*/
/* Read setup string from file. */
fp = fopen ("c:\\scope\\config\\setup.dat", "rb"); setup_size = fread (setup_string, sizeof(unsigned char),
SETUP_STR_SIZE, fp); fclose (fp);
554 | Agilent InfiniiVision 5000 Series Oscilloscopes Programmer's Reference |
