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[fw/altos] / src / kernel / ao_packet.h
1 /*
2  * Copyright © 2012 Keith Packard <keithp@keithp.com>
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; either version 2 of the License, or
7  * (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful, but
10  * WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12  * General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License along
15  * with this program; if not, write to the Free Software Foundation, Inc.,
16  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
17  */
18
19 #ifndef _AO_PACKET_H_
20 #define _AO_PACKET_H_
21
22 /*
23  * ao_packet.c
24  *
25  * Packet-based command interface
26  */
27
28 #define AO_PACKET_MAX           64
29 #define AO_PACKET_SYN           (uint8_t) 0xff
30
31 struct ao_packet {
32         uint8_t         addr;
33         uint8_t         len;
34         uint8_t         seq;
35         uint8_t         ack;
36         uint8_t         d[AO_PACKET_MAX];
37         uint8_t         callsign[AO_MAX_CALLSIGN];
38 };
39
40 struct ao_packet_recv {
41         struct ao_packet        packet;
42         int8_t                  rssi;
43         uint8_t                 status;
44 };
45
46 extern struct ao_packet_recv ao_rx_packet;
47 extern struct ao_packet ao_tx_packet;
48 extern struct ao_task   ao_packet_task;
49 extern uint8_t ao_packet_enable;
50 extern uint8_t ao_packet_master_sleeping;
51 extern uint8_t ao_packet_rx_len, ao_packet_rx_used, ao_packet_tx_used;
52 extern uint8_t ao_packet_restart;
53
54 void
55 ao_packet_send(void);
56
57 uint8_t
58 ao_packet_recv(uint16_t timeout);
59
60 void
61 ao_packet_flush(void);
62
63 void
64 ao_packet_putchar(char c);
65
66 int
67 _ao_packet_pollchar(void);
68
69 #if PACKET_HAS_MASTER
70 /* ao_packet_master.c */
71
72 extern int8_t ao_packet_last_rssi;
73
74 void
75 ao_packet_master_init(void);
76 #endif
77
78 #if PACKET_HAS_SLAVE
79 /* ao_packet_slave.c */
80
81 void
82 ao_packet_slave_start(void);
83
84 void
85 ao_packet_slave_stop(void);
86
87 void
88 ao_packet_slave_init(uint8_t enable);
89
90 #endif
91
92 #endif /* _AO_PACKET_H_ */