Random hacking

1 files changed, 85 insertions, 1 deletions

diff --git a/ccdbg.c b/ccdbg.c
index a2b5946d..64cb768f 100644
--- a/ccdbg.c
+++ b/ccdbg.c
@@ -18,18 +18,102 @@
 
 #include "ccdbg.h"
 
+static uint8_t
+get_bit(char *line, int i, char on, uint8_t bit)
+{
+	if (line[i] == on)
+		return bit;
+	if (line[i] == '.')
+		return 0;
+	fprintf(stderr, "bad line %s\n", line);
+	exit (1);
+}
+
+static char
+is_bit(uint8_t get, char on, uint8_t bit)
+{
+	if (get&bit)
+		return on;
+	else
+		return '.';
+}
+
+static uint8_t
+ccdbg_write_read(struct ccdbg *dbg, uint8_t set)
+{
+	uint8_t	get;
+
+	cccp_write(dbg, CC_DATA|CC_CLOCK|CC_RESET_N, set);
+	get = cccp_read_all(dbg);
+	printf("%c %c %c -> %c %c %c\n",
+	       is_bit(set, 'C', CC_CLOCK),
+	       is_bit(set, 'D', CC_DATA),
+	       is_bit(set, 'R', CC_RESET_N),
+	       is_bit(get, 'C', CC_CLOCK),
+	       is_bit(get, 'D', CC_DATA),
+	       is_bit(get, 'R', CC_RESET_N));
+	ccdbg_half_clock(dbg);
+	return get;
+}
+
+static void
+_ccdbg_debug_mode(struct ccdbg *dbg)
+{
+	ccdbg_write_read(dbg, CC_CLOCK|CC_DATA|CC_RESET_N);
+	ccdbg_write_read(dbg,          CC_DATA           );
+	ccdbg_write_read(dbg, CC_CLOCK|CC_DATA           );
+	ccdbg_write_read(dbg,          CC_DATA           );
+	ccdbg_write_read(dbg, CC_CLOCK|CC_DATA           );
+	ccdbg_write_read(dbg,          CC_DATA|CC_RESET_N);
+}
+
+static void
+_ccdbg_reset(struct ccdbg *dbg)
+{
+	ccdbg_write_read(dbg, CC_CLOCK|CC_DATA|CC_RESET_N);
+	ccdbg_write_read(dbg, CC_CLOCK|CC_DATA           );
+	ccdbg_write_read(dbg, CC_CLOCK|CC_DATA           );
+	ccdbg_write_read(dbg, CC_CLOCK|CC_DATA|CC_RESET_N);
+}
+
+static void
+ccdbg_manual(struct ccdbg *dbg, FILE *input)
+{
+	char	line[80];
+	uint8_t	set;
+
+	while (fgets(line, sizeof line, input)) {
+		if (line[0] == '#' || line[0] == '\n') {
+			printf ("%s", line);
+			continue;
+		}
+		set = 0;
+		set |= get_bit(line, 0, 'C', CC_CLOCK);
+		set |= get_bit(line, 2, 'D', CC_DATA);
+		set |= get_bit(line, 4, 'R', CC_RESET_N);
+		ccdbg_write_read(dbg, set);
+	}
+}
+
 int
 main (int argc, char **argv)
 {
 	struct ccdbg	*dbg;
 	uint8_t		status;
+	uint16_t	chip_id;
 
 	dbg = ccdbg_open("/dev/ttyUSB0");
 	if (!dbg)
 		exit (1);
-	ccdbg_reset(dbg);
+	ccdbg_manual(dbg, stdin);
+#if 0	
+	ccdbg_debug_mode(dbg);
 	status = ccdbg_read_status(dbg);
 	printf("Status: 0x%02x\n", status);
+	chip_id = ccdbg_get_chip_id(dbg);
+	printf("Chip id: 0x%04x\n", chip_id);
+#endif
+	_ccdbg_reset(dbg);
 	ccdbg_close(dbg);
 	exit (0);
 }