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/*
* Lib(X)SVF - A library for implementing SVF and XSVF JTAG players
*
* Copyright (C) 2009 RIEGL Research ForschungsGmbH
* Copyright (C) 2009 Clifford Wolf <clifford@clifford.at>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include "libxsvf.h"
int libxsvf_scan(struct libxsvf_host *h)
{
int i, j;
if (libxsvf_tap_walk(h, LIBXSVF_TAP_RESET) < 0)
return -1;
if (libxsvf_tap_walk(h, LIBXSVF_TAP_DRSHIFT) < 0)
return -1;
for (i=0; i<256; i++)
{
int bit = LIBXSVF_HOST_PULSE_TCK(0, 1, -1, 0, 1);
if (bit < 0)
return -1;
if (bit == 0) {
LIBXSVF_HOST_REPORT_DEVICE(0);
} else {
unsigned long idcode = 1;
for (j=1; j<32; j++) {
int bit = LIBXSVF_HOST_PULSE_TCK(0, 1, -1, 0, 1);
if (bit < 0)
return -1;
idcode |= ((unsigned long)bit) << j;
}
if (idcode == 0xffffffff)
break;
LIBXSVF_HOST_REPORT_DEVICE(idcode);
}
}
return 0;
}
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