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
23 /* XXX test these values with real igniters */
24 #define AO_IGNITER_OPEN 100
25 #define AO_IGNITER_CLOSED 20000
26 #define AO_IGNITER_FIRE_TIME AO_MS_TO_TICKS(50)
27 #define AO_IGNITER_CHARGE_TIME AO_MS_TO_TICKS(200)
35 __xdata struct ao_ignition ao_ignition[2];
38 ao_ignite(enum ao_igniter igniter) __critical
40 ao_ignition[igniter].request = 1;
41 ao_wakeup(&ao_ignition[0]);
44 enum ao_igniter_status
45 ao_igniter_status(enum ao_igniter igniter)
47 __xdata struct ao_adc adc;
48 __xdata int16_t value;
49 __xdata uint8_t request, firing, fired;
54 request = ao_ignition[igniter].request;
55 fired = ao_ignition[igniter].fired;
56 firing = ao_ignition[igniter].firing;
58 if (firing || (request && !fired))
59 return ao_igniter_active;
61 value = (AO_IGNITER_CLOSED>>1);
63 case ao_igniter_drogue:
70 if (value < AO_IGNITER_OPEN)
71 return ao_igniter_open;
72 else if (value > AO_IGNITER_CLOSED)
73 return ao_igniter_ready;
75 return ao_igniter_unknown;
79 ao_igniter_fire(enum ao_igniter igniter) __critical
81 ao_ignition[igniter].firing = 1;
83 case ao_igniter_drogue:
84 AO_IGNITER_DROGUE = 1;
85 ao_delay(AO_IGNITER_FIRE_TIME);
86 AO_IGNITER_DROGUE = 0;
90 ao_delay(AO_IGNITER_FIRE_TIME);
94 ao_ignition[igniter].firing = 0;
100 __xdata enum ao_ignter igniter;
101 __xdata enum ao_igniter_status status;
104 ao_sleep(&ao_ignition);
105 for (igniter = ao_igniter_drogue; igniter <= ao_igniter_main; igniter++) {
106 if (ao_ignition[igniter].request && !ao_ignition[igniter].fired) {
107 ao_igniter_fire(igniter);
108 ao_delay(AO_IGNITER_CHARGE_TIME);
109 status = ao_igniter_status(igniter);
110 if (status == ao_igniter_open)
111 ao_ignition[igniter].fired = 1;
117 __xdata struct ao_task ao_igniter_task;
120 ao_igniter_init(void)
122 ao_add_task(&ao_igniter_task, ao_igniter, "igniter");