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length = (sizeof(memory) / sizeof(char*));
for (loop = 0; loop < length; loop++)
{
IOOUTPUTS(ADDR_MEM, memory[loop], strlen(memory[loop]));
}
/* check for configuration errors */
check_error("digitizer", ADDR);
check_error("memory", ADDR_MEM);
}
/****************************************************************************/
void initiate(void)
{
int i = 0, readings = 20, swap = 0, bytes = 0, length = 1, *rdgs;
float rdy;
char lf_remove[1];
/* dynamically allocate memory for readings */
rdgs = malloc(20 * sizeof(float)); /* allocate computer memory for reading storage */
swap = sizeof(int); /* each reading in memory is two bytes */
bytes = 20 * swap; /* read 40 bytes (2 channels, 10 readings per channel) */
IOOUTPUTS(ADDR_MEM, "INIT", 4); /* initiate the memory card */
IOOUTPUTS(ADDR_MEM, "*OPC?", 5); /* wait for INIT to parse before continuing */
IOENTER(ADDR_MEM, &rdy); /* enter *OPC? response from memory card */
IOOUTPUTS(ADDR, "INIT", 4); /* initiate the digitizer */
IOOUTPUTS(ADDR, "*OPC?", 5); /* allow readings to complete before */
/* retrieving them from the memory card */
IOENTER(ADDR, &rdy); /* enter *OPC? response from digitizer */
IOOUTPUTS(ADDR_MEM, "TRAC:DATA? SET2", 15); /* retrieve readings from memory card
*/
IOENTERAB(ADDR_MEM, rdgs, &bytes, swap); /* enter readings and remove block header */
/* remove line feed which trails the last data byte */
IOENTERS(ADDR_MEM, lf_remove, &length);
Continued on Next Page
Chapter 2 Usin
g
the Di
g
itizer 85