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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_fetch(void)
{
char go;
int i = 0, readings = 20;
float *rdgs;
/* dynamically allocate memory for readings */
rdgs = malloc(20 * sizeof(float));
/* fetch (retrieve) and print readings */
IOOUTPUTS(ADDR, "FETC1?", 6);
IOENTERA(ADDR, rdgs, &readings);
for (i = 0; i < readings; i++)
{
printf("\nReading %d = %f", i, *rdgs++);
}
free(rdgs - readings);
}
/****************************************************************************/
void rst_clr(void)
{
/* Reset and clear the digitizer */
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42 Getting Started Chapter 1