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   1 /*
   2  * Copyright © 2012 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 #include <ao_log.h>
  20 #include <ao_data.h>
  21 #include <ao_flight.h>
  22
  23 static __xdata uint8_t  ao_log_mutex;
  24 static __xdata struct ao_log_mini log;
  25
  26 __code uint8_t ao_log_format = AO_LOG_FORMAT_MINI;
  27
  28 static uint8_t
  29 ao_log_csum(__xdata uint8_t *b) __reentrant
  30 {
  31         uint8_t sum = 0x5a;
  32         uint8_t i;
  33
  34         for (i = 0; i < sizeof (struct ao_log_mini); i++)
  35                 sum += *b++;
  36         return -sum;
  37 }
  38
  39 uint8_t
  40 ao_log_mini(__xdata struct ao_log_mini *log) __reentrant
  41 {
  42         uint8_t wrote = 0;
  43         /* set checksum */
  44         log->csum = 0;
  45         log->csum = ao_log_csum((__xdata uint8_t *) log);
  46         ao_mutex_get(&ao_log_mutex); {
  47                 if (ao_log_current_pos >= ao_log_end_pos && ao_log_running)
  48                         ao_log_stop();
  49                 if (ao_log_running) {
  50                         wrote = 1;
  51                         ao_storage_write(ao_log_current_pos,
  52                                          log,
  53                                          sizeof (struct ao_log_mini));
  54                         ao_log_current_pos += sizeof (struct ao_log_mini);
  55                 }
  56         } ao_mutex_put(&ao_log_mutex);
  57         return wrote;
  58 }
  59
  60 static uint8_t
  61 ao_log_dump_check_data(void)
  62 {
  63         if (ao_log_csum((uint8_t *) &log) != 0)
  64                 return 0;
  65         return 1;
  66 }
  67
  68 static __data uint8_t   ao_log_data_pos;
  69
  70 /* a hack to make sure that ao_log_minis fill the eeprom block in even units */
  71 typedef uint8_t check_log_size[1-(256 % sizeof(struct ao_log_mini))] ;
  72
  73 #ifndef AO_SENSOR_INTERVAL_ASCENT
  74 #define AO_SENSOR_INTERVAL_ASCENT       1
  75 #define AO_SENSOR_INTERVAL_DESCENT      10
  76 #endif
  77
  78 void
  79 ao_log(void)
  80 {
  81         __pdata uint16_t        next_sensor, next_other;
  82         uint8_t                 i;
  83
  84         ao_storage_setup();
  85
  86         ao_log_scan();
  87
  88         while (!ao_log_running)
  89                 ao_sleep(&ao_log_running);
  90
  91 #if HAS_FLIGHT
  92         log.type = AO_LOG_FLIGHT;
  93         log.tick = ao_sample_tick;
  94         log.u.flight.flight = ao_flight_number;
  95         log.u.flight.ground_pres = ao_ground_pres;
  96         ao_log_mini(&log);
  97 #endif
  98
  99         /* Write the whole contents of the ring to the log
 100          * when starting up.
 101          */
 102         ao_log_data_pos = ao_data_ring_next(ao_data_head);
 103         next_other = next_sensor = ao_data_ring[ao_log_data_pos].tick;
 104         ao_log_state = ao_flight_startup;
 105         for (;;) {
 106                 /* Write samples to EEPROM */
 107                 while (ao_log_data_pos != ao_data_head) {
 108                         log.tick = ao_data_ring[ao_log_data_pos].tick;
 109                         if ((int16_t) (log.tick - next_sensor) >= 0) {
 110                                 log.type = AO_LOG_SENSOR;
 111                                 ao_log_pack24(log.u.sensor.pres,
 112                                               ao_data_ring[ao_log_data_pos].ms5607_raw.pres);
 113                                 ao_log_pack24(log.u.sensor.temp,
 114                                               ao_data_ring[ao_log_data_pos].ms5607_raw.temp);
 115                                 log.u.sensor.sense_a = ao_data_ring[ao_log_data_pos].adc.sense_a;
 116                                 log.u.sensor.sense_m = ao_data_ring[ao_log_data_pos].adc.sense_m;
 117                                 log.u.sensor.v_batt = ao_data_ring[ao_log_data_pos].adc.v_batt;
 118                                 ao_log_mini(&log);
 119                                 if (ao_log_state <= ao_flight_coast)
 120                                         next_sensor = log.tick + AO_SENSOR_INTERVAL_ASCENT;
 121                                 else
 122                                         next_sensor = log.tick + AO_SENSOR_INTERVAL_DESCENT;
 123                         }
 124                         ao_log_data_pos = ao_data_ring_next(ao_log_data_pos);
 125                 }
 126 #if HAS_FLIGHT
 127                 /* Write state change to EEPROM */
 128                 if (ao_flight_state != ao_log_state) {
 129                         ao_log_state = ao_flight_state;
 130                         log.type = AO_LOG_STATE;
 131                         log.tick = ao_time();
 132                         log.u.state.state = ao_log_state;
 133                         log.u.state.reason = 0;
 134                         ao_log_mini(&log);
 135
 136                         if (ao_log_state == ao_flight_landed)
 137                                 ao_log_stop();
 138                 }
 139 #endif
 140
 141                 ao_log_flush();
 142
 143                 /* Wait for a while */
 144                 ao_delay(AO_MS_TO_TICKS(100));
 145
 146                 /* Stop logging when told to */
 147                 while (!ao_log_running)
 148                         ao_sleep(&ao_log_running);
 149         }
 150 }
 151
 152 uint16_t
 153 ao_log_flight(uint8_t slot)
 154 {
 155         if (!ao_storage_read(ao_log_pos(slot),
 156                              &log,
 157                              sizeof (struct ao_log_mini)))
 158                 return 0;
 159
 160         if (ao_log_dump_check_data() && log.type == AO_LOG_FLIGHT)
 161                 return log.u.flight.flight;
 162         return 0;
 163 }