Agilent Technologies InfiniiVision 7000A Series Programmer's Manual page 850

12
Programming Examples
850
int i;
unsigned char setup_string[SETUP_STR_SIZE];
int setup_size;
FILE *fp;
unsigned char image_data[IMG_SIZE];
int img_size;
/* SAVE_SYSTEM_SETUP - The :SYSTEM:SETUP? query returns a program
* message that contains the current state of the instrument.
* format is a definite-length binary block, for example,
* #800002204<setup string><NL>
* where the setup string is 2204 bytes in length.
*/
setup_size = SETUP_STR_SIZE;
/* Query and read setup string. */
viQueryf(vi, ":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);
printf("Read setup string (%d bytes) from file.\n", setup_size);
/* Restore setup string. */
viPrintf(vi, ":SYSTEM:SETUP #8%08d", setup_size);
viBufWrite(vi, setup_string, setup_size, &setup_size);
viPrintf(vi, "\n");
printf("Restored setup string (%d bytes).\n", setup_size);
/* IMAGE_TRANSFER - In this example we will query for the image
* data with ":DISPLAY:DATA?" to read the data and save the data
* to the file "image.dat" which you can then send to a printer.
*/
viSetAttribute(vi, VI_ATTR_TMO_VALUE, 30000);
printf("Transferring image to c:\\scope\\data\\screen.bmp\n");
img_size = IMG_SIZE;
viQueryf(vi, ":DISPLAY:DATA? BMP8bit, SCREEN, COLOR\n", "%#b\n",
&img_size, image_data);
printf("Read display data query (%d bytes).\n", img_size);
/* Write image data to file. */
fp = fopen ("c:\\scope\\data\\screen.bmp", "wb");
img_size = fwrite(image_data, sizeof(unsigned char), img_size, fp);
fclose (fp);
printf("Wrote image data (%d bytes) to file.\n", img_size);
viSetAttribute(vi, VI_ATTR_TMO_VALUE, 5000);
Agilent InfiniiVision 7000A Series Oscilloscopes Programmer's Guide
/* Loop counter. */
/* Array for setup
string. */
/* Array for image data. */
Its