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/****************************************************************************/
void memory_retrieve(long base_addr)
{
/* This function sets the address locations of the readings in digitizer memory, */
/* and enables the readings to be retrieved using the digitizer’s data register. */
char command[80];
int bit_reg = 0;
float bit_pat = 0;
/* using the traffic register set the pulse register as the high-speed */
/* clock source, the A/D is still the data source */
sprintf(command, "DIAG:PEEK? %ld, %d", base_addr+0x02,8);
IOOUTPUTS(CMD_MOD, command, strlen(command));
IOENTER(CMD_MOD, &bit_pat);
/* retain register settings, set pulse register as the high-speed */
/* clock source */
bit_reg = (int)(bit_pat + ((bit_pat >= 0) ? .5 : -.5));
bit_reg = (bit_reg & 0xF3);
sprintf(command, "DIAG:POKE %ld, %d, %d", base_addr+0x02,8,bit_reg);
IOOUTPUTS(CMD_MOD, command, strlen(command));
/* send a clock pulse to the internal high-speed bus to place the last */
/* A/D reading into memory */
sprintf(command, "DIAG:POKE %ld, %d, %d", base_addr+0x08,8,0);
IOOUTPUTS(CMD_MOD, command, strlen(command));
/* initialize the memory control register by setting bits 2 - 0 to ’0 0 0’ */
sprintf(command, "DIAG:PEEK? %ld, %d", base_addr+0x21,8);
IOOUTPUTS(CMD_MOD, command, strlen(command));
IOENTER(CMD_MOD, &bit_pat);
/* retain register settings, set memory control register bits 2 - 0 */
/* to ’0’ */
bit_reg = (int)(bit_pat + ((bit_pat >= 0) ? .5 : -.5));
bit_reg = (bit_reg & 0xF8);
sprintf(command, "DIAG:POKE %ld, %d, %d", base_addr+0x21,8,bit_reg);
IOOUTPUTS(CMD_MOD, command, strlen(command));
Continued on Next Page
Appendix C Register Programming 399