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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;
  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;
  82
  83         ao_storage_setup();
  84
  85         ao_log_scan();
  86
  87         while (!ao_log_running)
  88                 ao_sleep(&ao_log_running);
  89
  90 #if HAS_FLIGHT
  91         log.type = AO_LOG_FLIGHT;
  92         log.tick = ao_sample_tick;
  93         log.u.flight.flight = ao_flight_number;
  94         log.u.flight.ground_pres = ao_ground_pres;
  95         ao_log_mini(&log);
  96 #endif
  97
  98         /* Write the whole contents of the ring to the log
  99          * when starting up.
 100          */
 101         ao_log_data_pos = ao_data_ring_next(ao_data_head);
 102         next_sensor = ao_data_ring[ao_log_data_pos].tick;
 103         ao_log_state = ao_flight_startup;
 104         for (;;) {
 105                 /* Write samples to EEPROM */
 106                 while (ao_log_data_pos != ao_data_head) {
 107                         log.tick = ao_data_ring[ao_log_data_pos].tick;
 108                         if ((int16_t) (log.tick - next_sensor) >= 0) {
 109                                 log.type = AO_LOG_SENSOR;
 110                                 ao_log_pack24(log.u.sensor.pres,
 111                                               ao_data_ring[ao_log_data_pos].ms5607_raw.pres);
 112                                 ao_log_pack24(log.u.sensor.temp,
 113                                               ao_data_ring[ao_log_data_pos].ms5607_raw.temp);
 114                                 log.u.sensor.sense_a = ao_data_ring[ao_log_data_pos].adc.sense_a;
 115                                 log.u.sensor.sense_m = ao_data_ring[ao_log_data_pos].adc.sense_m;
 116                                 log.u.sensor.v_batt = ao_data_ring[ao_log_data_pos].adc.v_batt;
 117                                 ao_log_mini(&log);
 118                                 if (ao_log_state <= ao_flight_coast)
 119                                         next_sensor = log.tick + AO_SENSOR_INTERVAL_ASCENT;
 120                                 else
 121                                         next_sensor = log.tick + AO_SENSOR_INTERVAL_DESCENT;
 122                         }
 123                         ao_log_data_pos = ao_data_ring_next(ao_log_data_pos);
 124                 }
 125 #if HAS_FLIGHT
 126                 /* Write state change to EEPROM */
 127                 if (ao_flight_state != ao_log_state) {
 128                         ao_log_state = ao_flight_state;
 129                         log.type = AO_LOG_STATE;
 130                         log.tick = ao_time();
 131                         log.u.state.state = ao_log_state;
 132                         log.u.state.reason = 0;
 133                         ao_log_mini(&log);
 134
 135                         if (ao_log_state == ao_flight_landed)
 136                                 ao_log_stop();
 137                 }
 138 #endif
 139
 140                 ao_log_flush();
 141
 142                 /* Wait for a while */
 143                 ao_delay(AO_MS_TO_TICKS(100));
 144
 145                 /* Stop logging when told to */
 146                 while (!ao_log_running)
 147                         ao_sleep(&ao_log_running);
 148         }
 149 }
 150
 151 uint16_t
 152 ao_log_flight(uint8_t slot)
 153 {
 154         if (!ao_storage_read(ao_log_pos(slot),
 155                              &log,
 156                              sizeof (struct ao_log_mini)))
 157                 return 0;
 158
 159         if (ao_log_dump_check_data() && log.type == AO_LOG_FLIGHT)
 160                 return log.u.flight.flight;
 161         return 0;
 162 }