015e49c0af0c45443805f4b3dcc04e5bcd5b772d
[fpv.git] / imuboard / i2c_protocol.c
1 /*
2  * Copyright (c) 2014, Olivier MATZ <zer0@droids-corp.org>
3  * All rights reserved.
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions are met:
6  *
7  *     * Redistributions of source code must retain the above copyright
8  *       notice, this list of conditions and the following disclaimer.
9  *     * Redistributions in binary form must reproduce the above copyright
10  *       notice, this list of conditions and the following disclaimer in the
11  *       documentation and/or other materials provided with the distribution.
12  *     * Neither the name of the University of California, Berkeley nor the
13  *       names of its contributors may be used to endorse or promote products
14  *       derived from this software without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
17  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19  * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
20  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26  */
27
28 #include <string.h>
29
30 #include <aversive.h>
31 #include <aversive/error.h>
32
33 #include <i2c.h>
34
35 #include "../common/i2c_commands.h"
36 #include "gps_venus.h"
37 #include "main.h"
38
39 void i2c_protocol_init(void)
40 {
41 }
42
43 /*** LED CONTROL ***/
44 void i2c_led_control(uint8_t l, uint8_t state)
45 {
46         switch(l) {
47         case 1:
48                 state? LED1_ON():LED1_OFF();
49                 break;
50         case 2:
51                 state? LED2_ON():LED2_OFF();
52                 break;
53         default:
54                 break;
55         }
56 }
57
58 #ifdef notyet
59 static void i2c_test(uint16_t val)
60 {
61         static uint16_t prev=0;
62
63         if ( (val-prev) != 1 ) {
64                 WARNING(E_USER_I2C_PROTO, "Duplicated msg %d", val);
65         }
66         prev = val;
67         ext.nb_test_cmd ++;
68 }
69 #endif
70
71 static void i2c_send_status(void)
72 {
73         struct i2c_ans_imuboard_status ans;
74         struct gps_pos gps_pos;
75         uint8_t irq_flags;
76
77         i2c_flush();
78         ans.hdr.cmd =  I2C_ANS_IMUBOARD_STATUS;
79
80         /* gps */
81         IRQ_LOCK(irq_flags);
82         gps_get_pos(&gps_pos);
83         IRQ_UNLOCK(irq_flags);
84
85         ans.flags = 0;
86         if (imuboard.flags & IMUBOARD_F_BOOT_OK)
87                 ans.flags |= I2C_IMUBOARD_STATUS_BOOT_OK;
88         if (imuboard.flags & IMUBOARD_F_SDCARD_OK)
89                 ans.flags |= I2C_IMUBOARD_STATUS_SDCARD_OK;
90
91         if (gps_pos_valid(&gps_pos)) {
92                 ans.flags |= I2C_IMUBOARD_STATUS_GPS_OK;
93                 ans.latitude = gps_pos.latitude;
94                 ans.longitude = gps_pos.longitude;
95                 ans.altitude = gps_pos.altitude;
96         }
97
98         i2c_send(I2C_ADD_MASTER, (uint8_t *) &ans,
99                         sizeof(ans), I2C_CTRL_GENERIC);
100 }
101
102 void i2c_recvevent(uint8_t * buf, int8_t size)
103 {
104         void *void_cmd = buf;
105
106 #if 0 /* XXX */
107         static uint8_t a = 0;
108
109         a++;
110         if (a & 0x10)
111                 LED2_TOGGLE();
112
113         if (size <= 0) {
114                 goto error;
115         }
116 #endif
117
118         switch (buf[0]) {
119
120         /* Commands (no answer needed) */
121         case I2C_CMD_GENERIC_LED_CONTROL:
122                 {
123                         struct i2c_cmd_led_control *cmd = void_cmd;
124                         if (size != sizeof (*cmd))
125                                 goto error;
126                         i2c_led_control(cmd->led_num, cmd->state);
127                         break;
128                 }
129
130
131         /* Add other commands here ...*/
132
133         case I2C_REQ_IMUBOARD_STATUS:
134                 {
135                         //struct i2c_req_imuboard_status *cmd = void_cmd;
136                         if (size != sizeof (struct i2c_req_imuboard_status))
137                                 goto error;
138
139                         i2c_send_status();
140                         break;
141                 }
142
143         default:
144                 goto error;
145         }
146
147  error:
148         /* log error on a led ? */
149         return;
150 }
151
152 void i2c_recvbyteevent(__attribute__((unused)) uint8_t hwstatus,
153                        __attribute__((unused)) uint8_t i, 
154                        __attribute__((unused)) int8_t c)
155 {
156 }
157
158 void i2c_sendevent(__attribute__((unused)) int8_t size)
159 {
160 }
161
162