78 lines
2.0 KiB
C
78 lines
2.0 KiB
C
/*
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* Copyright © 2008 Keith Packard <keithp@keithp.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*/
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#include "ccdbg.h"
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#include "cc-bitbang.h"
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/*
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* Manual bit-banging to debug the low level protocol
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*/
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static void
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get_bit(char *line, int i, char on, uint8_t bit, uint8_t *bits, uint8_t *masks)
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{
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if (line[i] == on) {
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*bits |= bit;
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*masks |= bit;
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return;
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}
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if (line[i] == '.') {
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*masks |= bit;
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return;
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}
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if (line[i] == '-') {
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return;
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}
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fprintf(stderr, "bad line %s\n", line);
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exit (1);
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}
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void
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ccdbg_manual(struct ccdbg *dbg, FILE *input)
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{
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char line[80];
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uint8_t set, mask;
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if (dbg->bb == NULL) {
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fprintf(stderr, "Must use bitbang API for manual mode\n");
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return;
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}
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while (fgets(line, sizeof line, input)) {
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if (line[0] == '#' || line[0] == '\n') {
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printf ("%s", line);
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continue;
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}
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set = 0;
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mask = 0;
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get_bit(line, 0, 'C', CC_CLOCK, &set, &mask);
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get_bit(line, 2, 'D', CC_DATA, &set, &mask);
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get_bit(line, 4, 'R', CC_RESET_N, &set, &mask);
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if (mask != (CC_CLOCK|CC_DATA|CC_RESET_N)) {
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uint8_t read;
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cc_bitbang_read(dbg->bb, &read);
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cc_bitbang_sync(dbg->bb);
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cc_bitbang_print("\t%c %c %c", CC_CLOCK|CC_DATA|CC_RESET_N, read);
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if ((set & CC_CLOCK) == 0)
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printf ("\t%d", (read&CC_DATA) ? 1 : 0);
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printf ("\n");
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}
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cc_bitbang_send(dbg->bb, mask, set);
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cc_bitbang_sync(dbg->bb);
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}
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}
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