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/*
* Copyright © 2009 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; version 2 of the License.
*
* 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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "ao.h"
#define AO_IGNITER_DROGUE P2_3
#define AO_IGNITER_MAIN P2_4
#define AO_IGNITER_DIR P2DIR
#define AO_IGNITER_DROGUE_BIT (1 << 3)
#define AO_IGNITER_MAIN_BIT (1 << 4)
/* test these values with real igniters */
#define AO_IGNITER_OPEN 1000
#define AO_IGNITER_CLOSED 7000
#define AO_IGNITER_FIRE_TIME AO_MS_TO_TICKS(500)
#define AO_IGNITER_CHARGE_TIME AO_MS_TO_TICKS(2000)
struct ao_ignition {
uint8_t request;
uint8_t fired;
uint8_t firing;
};
__xdata struct ao_ignition ao_ignition[2];
void
ao_ignite(enum ao_igniter igniter) __critical
{
ao_ignition[igniter].request = 1;
ao_wakeup(&ao_ignition[0]);
}
enum ao_igniter_status
ao_igniter_status(enum ao_igniter igniter)
{
__xdata struct ao_adc adc;
__xdata int16_t value;
__xdata uint8_t request, firing, fired;
__critical {
ao_adc_sleep();
ao_adc_get(&adc);
request = ao_ignition[igniter].request;
fired = ao_ignition[igniter].fired;
firing = ao_ignition[igniter].firing;
}
if (firing || (request && !fired))
return ao_igniter_active;
value = (AO_IGNITER_CLOSED>>1);
switch (igniter) {
case ao_igniter_drogue:
value = adc.sense_d;
break;
case ao_igniter_main:
value = adc.sense_m;
break;
}
if (value < AO_IGNITER_OPEN)
return ao_igniter_open;
else if (value > AO_IGNITER_CLOSED)
return ao_igniter_ready;
else
return ao_igniter_unknown;
}
void
ao_igniter_fire(enum ao_igniter igniter) __critical
{
ao_ignition[igniter].firing = 1;
switch (igniter) {
case ao_igniter_drogue:
AO_IGNITER_DROGUE = 1;
ao_delay(AO_IGNITER_FIRE_TIME);
AO_IGNITER_DROGUE = 0;
break;
case ao_igniter_main:
AO_IGNITER_MAIN = 1;
ao_delay(AO_IGNITER_FIRE_TIME);
AO_IGNITER_MAIN = 0;
break;
}
ao_ignition[igniter].firing = 0;
}
void
ao_igniter(void)
{
__xdata enum ao_ignter igniter;
__xdata enum ao_igniter_status status;
for (;;) {
ao_sleep(&ao_ignition);
for (igniter = ao_igniter_drogue; igniter <= ao_igniter_main; igniter++) {
if (ao_ignition[igniter].request && !ao_ignition[igniter].fired) {
ao_igniter_fire(igniter);
ao_delay(AO_IGNITER_CHARGE_TIME);
status = ao_igniter_status(igniter);
if (status == ao_igniter_open)
ao_ignition[igniter].fired = 1;
}
}
}
}
__xdata struct ao_task ao_igniter_task;
void
ao_igniter_init(void)
{
AO_IGNITER_DROGUE = 0;
AO_IGNITER_MAIN = 0;
AO_IGNITER_DIR |= AO_IGNITER_DROGUE_BIT | AO_IGNITER_MAIN_BIT;
ao_add_task(&ao_igniter_task, ao_igniter, "igniter");
}
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