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/* Send the DIAG:UPL:SADD? command which accesses the data register */
/* and retrieves the readings */
IOOUTPUTS(CMD_MOD, rd_mem, strlen(rd_mem)); /* retrieve and enter the readings, */
IOENTERAB(CMD_MOD, rdgs, &bytes, swap); /* remove the block header */
/* remove the line feed which trails the last data byte */
IOENTERS(CMD_MOD, lf_remove, &length);
/* convert and print each reading as a voltage */
for (i = 0; i < 20; i++)
{
rdgs[i] /= 16; /* remove label from each reading */
if (rdgs[i] >= 2047 || rdgs[i] <= -2046)
printf("\nReading overrange");
else
printf("\nReading %d = %.6E", i, (rdgs[i] * 0.0005));
}
free(rdgs);
}
/****************************************************************************/
long get_base_addr(void)
{
/* This function returns the digitizer’s A24 base address. */
/* digitizer logical address */
long logical_addr = (ADDR - 70900L) * 8;
/* base address of (A24) offset register in A16 address space */
long base_addr = (0x1FC000 + (logical_addr * 64)) + 6;
float a24offst; /* A24 offset from A16 offset register */
char rd_addr[80]; /* command string variable */
/* Create the command string which reads the A24 base address */
sprintf(rd_addr, "DIAG:PEEK? %ld, %d", base_addr,16);
/* Send DIAG:PEEK? command */
IOOUTPUTS(CMD_MOD, rd_addr, strlen(rd_addr));
/* Read value from offset register */
IOENTER(CMD_MOD, &a24offst);
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402 Register Programming Appendix C