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/****************************************************************************/
void mem_read(long base_addr)
{
int readings = 100, i = 0;
float *rdgs;
char rd_mem[80]; /* command string variable */
/* dynamically allocate memory for readings */
rdgs = malloc(100 * sizeof(float));
/* Create the (HP E1406 Command Module) command string which reads the data register */
sprintf(rd_mem, "DIAG:PEEK? %ld, %d", base_addr+0x0C,16);
/* Send DIAG:PEEK? command which accesses the data register */
/* and triggers measurements, and then retrieve measurements */
for (i = 0;i < readings; i++)
{
IOOUTPUTS(CMD_MOD, rd_mem, strlen(rd_mem));
IOENTER(CMD_MOD, &rdgs[i]);
}
/* Print a subset of the readings */
for (i = 0;i < 20;i++)
{
rdgs[i] /= 16; /* remove label from 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)
{
/* digitizer logical address */
long logical_addr = (ADDR - 70900L) * 8;
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Chapter 2 Usin
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