git.gag.com Git - fw/altos/blob - src/drivers/ao_log_fat.c

   1 /*
   2  * Copyright © 2013 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_fat.h"
  21
  22 static uint8_t  log_year, log_month, log_day;
  23 static uint8_t  log_open;
  24 static int8_t   log_fd;
  25 static uint8_t  log_mutex;
  26
  27 static void
  28 ao_log_open(void)
  29 {
  30         static char     name[12];
  31         int8_t  status;
  32
  33         sprintf(name,"%04d%02d%02dLOG", 2000 + log_year, log_month, log_day);
  34         status = ao_fat_open(name, AO_FAT_OPEN_WRITE);
  35         if (status >= 0) {
  36                 log_fd = status;
  37                 ao_fat_seek(log_fd, 0, AO_FAT_SEEK_END);
  38                 log_open = 1;
  39         } else if (status == -AO_FAT_ENOENT) {
  40                 status = ao_fat_creat(name);
  41                 if (status >= 0) {
  42                         log_fd = status;
  43                         log_open = 1;
  44                 }
  45         }
  46 }
  47
  48 static void
  49 ao_log_close(void)
  50 {
  51         if (log_open) {
  52                 log_open = 0;
  53                 ao_fat_close(log_fd);
  54                 log_fd = -1;
  55         }
  56 }
  57
  58 uint8_t
  59 ao_log_full(void)
  60 {
  61         return ao_fat_full();
  62 }
  63
  64 uint8_t
  65 ao_log_mega(struct ao_log_mega *log)
  66 {
  67         uint8_t wrote = 0;
  68         ao_mutex_get(&log_mutex);
  69         if (log->type == AO_LOG_GPS_TIME) {
  70                 if (log_open &&
  71                     (log_year != log->u.gps.year ||
  72                      log_month != log->u.gps.month ||
  73                      log_day != log->u.gps.day)) {
  74                         ao_log_close();
  75                 }
  76                 if (!log_open) {
  77                         log_year = log->u.gps.year;
  78                         log_month = log->u.gps.month;
  79                         log_day = log->u.gps.day;
  80                         ao_log_open();
  81                 }
  82         }
  83         if (log_open) {
  84                 wrote = ao_fat_write(log_fd, log, sizeof (*log)) == AO_FAT_SUCCESS;
  85                 ao_fat_sync();
  86         }
  87         ao_mutex_put(&log_mutex);
  88         return wrote;
  89 }
  90
  91 void
  92 ao_log_flush(void)
  93 {
  94         ao_fat_sync();
  95 }