2 * Copyright © 2009 Keith Packard <keithp@keithp.com>
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; version 2 of the License.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
20 #define AO_IGNITER_DROGUE P2_3
21 #define AO_IGNITER_MAIN P2_4
22 #define AO_IGNITER_DIR P2DIR
23 #define AO_IGNITER_DROGUE_BIT (1 << 3)
24 #define AO_IGNITER_MAIN_BIT (1 << 4)
26 /* test these values with real igniters */
27 #define AO_IGNITER_OPEN 1000
28 #define AO_IGNITER_CLOSED 7000
29 #define AO_IGNITER_FIRE_TIME AO_MS_TO_TICKS(500)
30 #define AO_IGNITER_CHARGE_TIME AO_MS_TO_TICKS(2000)
38 __xdata struct ao_ignition ao_ignition[2];
41 ao_ignite(enum ao_igniter igniter) __critical
43 ao_ignition[igniter].request = 1;
44 ao_wakeup(&ao_ignition[0]);
47 enum ao_igniter_status
48 ao_igniter_status(enum ao_igniter igniter)
50 __xdata struct ao_adc adc;
51 __xdata int16_t value;
52 __xdata uint8_t request, firing, fired;
57 request = ao_ignition[igniter].request;
58 fired = ao_ignition[igniter].fired;
59 firing = ao_ignition[igniter].firing;
61 if (firing || (request && !fired))
62 return ao_igniter_active;
64 value = (AO_IGNITER_CLOSED>>1);
66 case ao_igniter_drogue:
73 if (value < AO_IGNITER_OPEN)
74 return ao_igniter_open;
75 else if (value > AO_IGNITER_CLOSED)
76 return ao_igniter_ready;
78 return ao_igniter_unknown;
82 ao_igniter_fire(enum ao_igniter igniter) __critical
84 ao_ignition[igniter].firing = 1;
86 case ao_igniter_drogue:
87 AO_IGNITER_DROGUE = 1;
88 ao_delay(AO_IGNITER_FIRE_TIME);
89 AO_IGNITER_DROGUE = 0;
93 ao_delay(AO_IGNITER_FIRE_TIME);
97 ao_ignition[igniter].firing = 0;
103 __xdata enum ao_ignter igniter;
104 __xdata enum ao_igniter_status status;
107 ao_sleep(&ao_ignition);
108 for (igniter = ao_igniter_drogue; igniter <= ao_igniter_main; igniter++) {
109 if (ao_ignition[igniter].request && !ao_ignition[igniter].fired) {
110 ao_igniter_fire(igniter);
111 ao_delay(AO_IGNITER_CHARGE_TIME);
112 status = ao_igniter_status(igniter);
113 if (status == ao_igniter_open)
114 ao_ignition[igniter].fired = 1;
120 __xdata struct ao_task ao_igniter_task;
123 ao_igniter_init(void)
125 AO_IGNITER_DROGUE = 0;
127 AO_IGNITER_DIR |= AO_IGNITER_DROGUE_BIT | AO_IGNITER_MAIN_BIT;
128 ao_add_task(&ao_igniter_task, ao_igniter, "igniter");