Allen-Bradley 1784-KTX Reference Manual page 101

Appendix B
Programming Examples
/***************************************************************************
**
** UBYTE autoconfigure (KTX_DUALPORT far *dp, UBYTE trans_num,
**
**
** This routine instructs the KTX scanner to perform an
** autoconfiguration and waits for a confirmation.
** command requires the scanner to poll all 128 possible device
** addresses on the RIO link, which can take as long as 6 seconds
** when operating at 57.6 Kbaud.
**
** INPUTS
** KTX_DUALPORT far *dp
** UBYTE trans_num
** USHORT timeout
**
** OUTPUT
** UBYTE status
**
***************************************************************************/
#include "ktx_dp.h"
#include "ktx_err.h"
#include "ktxconst.h"
UBYTE autoconfigure (KTX_DUALPORT far *dp, UBYTE trans_num, USHORT timeout)
{
UBYTE status;
/**** Initialize the command buffer ****/
dp–>cmd_buffer.host_command = AUTOCONFIG;
dp–>cmd_buffer.transaction_num = trans_num;
dp–>cmd_buffer.command_length = 0;
/**** Send the command ****/
dp–>int_status_from_host = SCANNER_COMMAND_FROM_HOST;
dp–>host_to_ktx_int_reg = INTERRUPT_KTX;
/**** Get and acknowledge the confirmation
status = get_confirmation(dp, trans_num, timeout);
if ((status != CONFIRMATION_TIMED_OUT) && (status != TRANS_NUM_MISMATCH))
acknowledge_confirmation(dp);
return status;
}
Allen-Bradley Parts
B-22
autoconf.c file
USHORT timeout)
– points to the base of the KTX dualport
– transaction_number
– time (in seconds) to wait for completion
– completion status of the command
/* 1784–KTX scanner dualport definition
/* 1784–KTX scanner error codes
/* 1784–KTX scanner constants
****/
An autoconfigure
*/
*/
*/