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/****************************************************************************/
void ad_conf(void)
{
int length = 0, loop = 0;
/* use the "set_commands" array to configure digitizer channel 1 */
char static *set_commands[] =
{"CONF1:ARR:VOLT (20),5,(@3)", /* set 20 readings per burst, 5V range */
"ARM:STAR:SOUR IMM", /* set arm source immediate */
"ARM:STAR:COUN 2", /* set 2 bursts (arms) */
"TRIG:STAR:SOUR VME", /* Data register access triggers readings */
"SENS:SWE:OFFS:POIN -10", /* set 10 pre-arm readings */
"VINS:CONF:VME:MODE GEN", /* enable VME bus data transfers */
"VINS:CONF:VME:FEED ’CONV:CHAN1’", /* real time data transfer */
"INIT"}; /* put digitizer in wait-for-arm state */
length = (sizeof(set_commands) / sizeof(char*));
/* Execute each command using a loop */
for (loop = 0; loop < length; loop++)
{
IOOUTPUTS(ADDR, set_commands[loop], strlen(set_commands[loop]));
}
/* function call to check for digitizer configuration errors */
check_error("ad_conf");
}
/****************************************************************************/
void ad_read(long base_addr)
{
int i, readings = 20, index = 0, loop = 0;
float *rdgs, bit;
char read_str[80], bit_str[80]; /* command string variables */
/* dynamically allocate memory for readings */
rdgs = malloc(40 * sizeof(float));
/* Create the command string which reads the data register */
sprintf(read_str, "DIAG:PEEK? %ld, %d", base_addr+0x0C,16);
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68 Usin
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the Di
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itizer Chapter 2