cc1111 debug port access through cp2103 serial chip

1 files changed, 135 insertions, 0 deletions

diff --git a/ccdbg-io.c b/ccdbg-io.c
new file mode 100644
index 00000000..2019885d
--- /dev/null
+++ b/ccdbg-io.c
@@ -0,0 +1,135 @@
+/*
+ * 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"
+
+void
+ccdbg_quarter_clock(struct ccdbg *dbg)
+{
+	usleep(CC_CLOCK_US / 4);
+}
+
+struct ccdbg *
+ccdbg_open(char *file)
+{
+	struct ccdbg *dbg;
+
+	dbg = calloc(sizeof (struct ccdbg), 1);
+	if (!dbg) {
+		perror("calloc");
+		return NULL;
+	}
+	dbg->fd = open(file, 2);
+	if (dbg->fd < 0) {
+		perror(file);
+		free(dbg);
+		return NULL;
+	}
+	cccp_init(dbg);
+	return dbg;
+}
+
+void
+ccdbg_clock_1_0(struct ccdbg *dbg)
+{
+	ccdbg_quarter_clock(dbg);
+	assert(dbg->clock == 1);
+	cccp_write(dbg, CC_CLOCK, 0);
+	dbg->clock = 0;
+	ccdbg_quarter_clock(dbg);
+}
+
+void
+ccdbg_clock_0_1(struct ccdbg *dbg)
+{
+	ccdbg_quarter_clock(dbg);
+	assert(dbg->clock == 0);
+	cccp_write(dbg, CC_CLOCK, CC_CLOCK);
+	dbg->clock = 1;
+	ccdbg_quarter_clock(dbg);
+}
+
+/*
+ * By convention, every macro function is entered with dbg->clock == 1
+ */
+
+void
+ccdbg_write_bit(struct ccdbg *dbg, uint8_t bit)
+{
+	ccdbg_clock_1_0(dbg);
+	cccp_write(dbg, CC_DATA, bit ? CC_DATA : 0);
+	ccdbg_clock_0_1(dbg);
+}
+
+void
+ccdbg_write_byte(struct ccdbg *dbg, uint8_t byte)
+{
+	int	bit;
+
+	for (bit = 7; bit >= 0; bit--)
+		ccdbg_write_bit(dbg, (byte >> bit) & 1);
+}
+
+uint8_t
+ccdbg_read_bit(struct ccdbg *dbg)
+{
+	uint8_t	data;
+
+	ccdbg_clock_1_0(dbg);
+	data = cccp_read(dbg, CC_DATA);
+	ccdbg_clock_0_1(dbg);
+	return data ? 1 : 0;
+}
+
+uint8_t
+ccdbg_read_byte(struct ccdbg *dbg)
+{
+	int	bit;
+	uint8_t	byte = 0;
+
+	for (bit = 7; bit >= 0; bit--)
+		byte |= ccdbg_read_bit(dbg) << bit;
+	return byte;
+}
+
+void
+ccdbg_cmd_write(struct ccdbg *dbg, uint8_t cmd, uint8_t *data, int len)
+{
+	int	i;
+	ccdbg_write_byte(dbg, cmd);
+	for (i = 0; i < len; i++)
+		ccdbg_write_byte(dbg, data[i]);
+}
+
+uint8_t
+ccdbg_cmd_write_read8(struct ccdbg *dbg, uint8_t cmd, uint8_t *data, int len)
+{
+	ccdbg_cmd_write(dbg, cmd, data, len);
+	return ccdbg_read_byte(dbg);
+}
+
+uint16_t
+ccdbg_cmd_write_read16(struct ccdbg *dbg, uint8_t cmd, uint8_t *data, int len)
+{
+	uint8_t	byte1, byte0;
+	ccdbg_cmd_write(dbg, cmd, data, len);
+	byte1 = ccdbg_read_byte(dbg); 
+	byte0 = ccdbg_read_byte(dbg);
+	return (byte1 << 8) | byte0;
+}
+