1 files changed, 77 insertions, 0 deletions
diff --git a/ao-tools/lib/ccdbg-manual.c b/ao-tools/lib/ccdbg-manual.c
new file mode 100644
index 00000000..0e811b76
--- /dev/null
+++ b/ao-tools/lib/ccdbg-manual.c
@@ -0,0 +1,77 @@
+/*
+ * Copyright © 2008 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "ccdbg.h"
+#include "cc-bitbang.h"
+
+/*
+ * Manual bit-banging to debug the low level protocol
+ */
+
+static void
+get_bit(char *line, int i, char on, uint8_t bit, uint8_t *bits, uint8_t *masks)
+{
+	if (line[i] == on) {
+		*bits |= bit;
+		*masks |= bit;
+		return;
+	}
+	if (line[i] == '.') {
+		*masks |= bit;
+		return;
+	}
+	if (line[i] == '-') {
+		return;
+	}
+	fprintf(stderr, "bad line %s\n", line);
+	exit (1);
+}
+
+void
+ccdbg_manual(struct ccdbg *dbg, FILE *input)
+{
+	char	line[80];
+	uint8_t	set, mask;
+
+	if (dbg->bb == NULL) {
+		fprintf(stderr, "Must use bitbang API for manual mode\n");
+		return;
+	}
+	while (fgets(line, sizeof line, input)) {
+		if (line[0] == '#' || line[0] == '\n') {
+			printf ("%s", line);
+			continue;
+		}
+		set = 0;
+		mask = 0;
+		get_bit(line, 0, 'C', CC_CLOCK, &set, &mask);
+		get_bit(line, 2, 'D', CC_DATA, &set, &mask);
+		get_bit(line, 4, 'R', CC_RESET_N, &set, &mask);
+		if (mask != (CC_CLOCK|CC_DATA|CC_RESET_N)) {
+			uint8_t	read;
+			cc_bitbang_read(dbg->bb, &read);
+			cc_bitbang_sync(dbg->bb);
+			cc_bitbang_print("\t%c %c %c", CC_CLOCK|CC_DATA|CC_RESET_N, read);
+			if ((set & CC_CLOCK) == 0)
+				printf ("\t%d", (read&CC_DATA) ? 1 : 0);
+			printf ("\n");
+		}
+		cc_bitbang_send(dbg->bb, mask, set);
+		cc_bitbang_sync(dbg->bb);
+	}
+}