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