altos: Add RN4678 Bluetooth module driver

This works much like the old BTM module, but supports both bluetooth
and bluetooth LE. I've poked at it briefly over BTLE to see that it
appears to have the right name, but haven't attempted to communicate
over BTLE yet.

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 98 insertions, 0 deletions

diff --git a/src/drivers/ao_rn4678.h b/src/drivers/ao_rn4678.h
new file mode 100644
index 00000000..d6fea23a
--- /dev/null
+++ b/src/drivers/ao_rn4678.h
@@ -0,0 +1,98 @@
+/*
+ * Copyright © 2017 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.
+ */
+
+#ifndef _AO_RN4678_H_
+#define _AO_RN4678_H_
+
+/* From the rn4678 pictail board
+
+    1	SW_BTN	0-off/1-on	 2	P2_0	1-app/0-test (boot time)
+    3	P2_4	1-app/0-WF	 4	EAN	0-app/1-WF (reboots)
+    5				 6	RTS	0
+    7				 8	P3_2	1 (NC)
+    9	TXD			10	P3_3	1 (NC)
+   11	RXD			12	P3_4	1 (NC)
+   13				14
+   15				16	P3_7	1 (NC)
+   17	P0_5	1 (NC)		18	RST_N	1 run/0 reset
+   19	WAKE_UP	1 run/0 btn	20
+   21	P0_4	0 (NC)		22
+   23	P1_5	1 (NC)		24	P3_1	1 (NC)
+   25	CTS	0		26	3.3V
+   27				28	GND
+
+
+   Interesting pins:
+
+   Not connected to microcontroller:
+
+   SW_BTN	0-off		1-on
+   P2_4		0 write-flash	1-app
+   WAKE_UP	0-stop		1-run
+   P2_0		0 test		1-run
+   EAN		1-WF (reboots)	0-run
+   RST_N	0 reset		1 run
+
+   Connected to microcontroller:
+
+   CTS		mostly 0
+   RTS		mostly 1
+
+   TXD
+   RXD
+
+   Other connections -- LDO33_O to VDD_IO
+
+*/
+
+#define AO_RN_REBOOT_MSG	"%REBOOT%"
+
+#define AO_RN_CMD_TIMEOUT	AO_MS_TO_TICKS(200)
+
+#define AO_RN_REBOOT_TIMEOUT	AO_MS_TO_TICKS(2000)
+
+#define AO_RN_MAX_REPLY_LEN	10
+
+#define AO_RN_SET_NAME_CMD		"SN,"
+#define AO_RN_GET_NAME_CMD		"GN"
+
+#define AO_RN_SET_STATUS_STRING	"SO,"
+#define AO_RN_STATUS_STRING_DISABLE	" "
+
+#define AO_RN_REBOOT_CMD		"R,1"
+
+#define AO_RN_TIMEOUT	-1
+#define AO_RN_ERROR	0
+#define AO_RN_OK	1
+
+#define AO_RN_SET_COMMAND_PIN	"SX,07,0B"
+
+#define AO_RN_SET_AUTH_JUST_WORKS	"SA,2"
+#define AO_RN_SET_FAST_MODE		"SQ,9000"
+
+/* This pin is configured to control cmd/data mode */
+#define AO_RN_CMD_PORT	AO_RN_P3_7_PORT
+#define AO_RN_CMD_PIN	AO_RN_P3_7_PIN
+
+#define AO_RN_CMD_CMD	0
+#define AO_RN_CMD_DATA	1
+
+/* This pin indicates BT connection status */
+#define AO_RN_CONNECTED_PORT	AO_RN_P1_5_PORT
+#define AO_RN_CONNECTED_PIN	AO_RN_P1_5_PIN
+
+void
+ao_rn4678_init(void);
+
+#endif /* _AO_RN_H_ */