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   1 /*
   2  * Copyright © 2009 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; version 2 of the License.
   7  *
   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.
  12  *
  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.
  16  */
  17
  18 #include "ao.h"
  19
  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)
  25
  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(50)
  30 #define AO_IGNITER_CHARGE_TIME  AO_MS_TO_TICKS(2000)
  31
  32 struct ao_ignition {
  33         uint8_t request;
  34         uint8_t fired;
  35         uint8_t firing;
  36 };
  37
  38 __xdata struct ao_ignition ao_ignition[2];
  39
  40 void
  41 ao_ignite(enum ao_igniter igniter) __critical
  42 {
  43         ao_ignition[igniter].request = 1;
  44         ao_wakeup(&ao_ignition[0]);
  45 }
  46
  47 enum ao_igniter_status
  48 ao_igniter_status(enum ao_igniter igniter)
  49 {
  50         __xdata struct ao_adc adc;
  51         __xdata int16_t value;
  52         __xdata uint8_t request, firing, fired;
  53
  54         __critical {
  55                 ao_adc_get(&adc);
  56                 request = ao_ignition[igniter].request;
  57                 fired = ao_ignition[igniter].fired;
  58                 firing = ao_ignition[igniter].firing;
  59         }
  60         if (firing || (request && !fired))
  61                 return ao_igniter_active;
  62
  63         value = (AO_IGNITER_CLOSED>>1);
  64         switch (igniter) {
  65         case ao_igniter_drogue:
  66                 value = adc.sense_d;
  67                 break;
  68         case ao_igniter_main:
  69                 value = adc.sense_m;
  70                 break;
  71         }
  72         if (value < AO_IGNITER_OPEN)
  73                 return ao_igniter_open;
  74         else if (value > AO_IGNITER_CLOSED)
  75                 return ao_igniter_ready;
  76         else
  77                 return ao_igniter_unknown;
  78 }
  79
  80 void
  81 ao_igniter_fire(enum ao_igniter igniter) __critical
  82 {
  83         ao_ignition[igniter].firing = 1;
  84         switch (igniter) {
  85         case ao_igniter_drogue:
  86                 AO_IGNITER_DROGUE = 1;
  87                 ao_delay(AO_IGNITER_FIRE_TIME);
  88                 AO_IGNITER_DROGUE = 0;
  89                 break;
  90         case ao_igniter_main:
  91                 AO_IGNITER_MAIN = 1;
  92                 ao_delay(AO_IGNITER_FIRE_TIME);
  93                 AO_IGNITER_MAIN = 0;
  94                 break;
  95         }
  96         ao_ignition[igniter].firing = 0;
  97 }
  98
  99 void
 100 ao_igniter(void)
 101 {
 102         __xdata enum ao_ignter igniter;
 103
 104         ao_config_get();
 105         for (;;) {
 106                 ao_sleep(&ao_ignition);
 107                 for (igniter = ao_igniter_drogue; igniter <= ao_igniter_main; igniter++) {
 108                         if (ao_ignition[igniter].request && !ao_ignition[igniter].fired) {
 109                                 if (igniter == ao_igniter_drogue && ao_config.apogee_delay)
 110                                         ao_delay(AO_SEC_TO_TICKS(ao_config.apogee_delay));
 111
 112                                 ao_igniter_fire(igniter);
 113                                 ao_delay(AO_IGNITER_CHARGE_TIME);
 114                                 ao_ignition[igniter].fired = 1;
 115                         }
 116                 }
 117         }
 118 }
 119
 120 void
 121 ao_ignite_manual(void)
 122 {
 123         ao_cmd_white();
 124         if (!ao_match_word("DoIt"))
 125                 return;
 126         ao_cmd_white();
 127         if (ao_cmd_lex_c == 'm') {
 128                 if(ao_match_word("main"))
 129                         ao_igniter_fire(ao_igniter_main);
 130         } else {
 131                 if(ao_match_word("drogue"))
 132                         ao_igniter_fire(ao_igniter_drogue);
 133         }
 134 }
 135
 136 static __code char *igniter_status_names[] = {
 137         "unknown", "ready", "active", "open"
 138 };
 139
 140 void
 141 ao_ignite_print_status(enum ao_igniter igniter, __code char *name) __reentrant
 142 {
 143         enum ao_igniter_status status = ao_igniter_status(igniter);
 144         printf("Igniter: %6s Status: %s\n",
 145                name,
 146                igniter_status_names[status]);
 147 }
 148
 149 void
 150 ao_ignite_test(void)
 151 {
 152         ao_ignite_print_status(ao_igniter_drogue, "drogue");
 153         ao_ignite_print_status(ao_igniter_main, "main");
 154 }
 155
 156 __code struct ao_cmds ao_ignite_cmds[] = {
 157         { 'i',  ao_ignite_manual,       "i <key> {main|drogue}              Fire igniter. <key> is doit with D&I" },
 158         { 't',  ao_ignite_test,         "t                                  Test igniter continuity" },
 159         { 0,    ao_ignite_manual,       NULL },
 160 };
 161
 162 __xdata struct ao_task ao_igniter_task;
 163
 164 void
 165 ao_igniter_init(void)
 166 {
 167         AO_IGNITER_DROGUE = 0;
 168         AO_IGNITER_MAIN = 0;
 169         AO_IGNITER_DIR |= AO_IGNITER_DROGUE_BIT | AO_IGNITER_MAIN_BIT;
 170         ao_cmd_register(&ao_ignite_cmds[0]);
 171         ao_add_task(&ao_igniter_task, ao_igniter, "igniter");
 172 }