--- /dev/null
+/*
+ * Copyright © 2013 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"
+#include "ao_log.h"
+#include "ao_fat.h"
+
+static uint8_t log_year, log_month, log_day;
+static uint8_t log_running;
+static uint8_t log_mutex;
+
+static void
+ao_log_open(void)
+{
+ char name[12];
+
+ sprintf(name,"%04d%02d%02dLOG", 2000 + log_year, log_month, log_day);
+ if (ao_fat_open(name, AO_FAT_OPEN_WRITE) == AO_FAT_SUCCESS)
+ log_running = 1;
+}
+
+static void
+ao_log_close(void)
+{
+ log_running = 0;
+ ao_fat_close();
+}
+
+uint8_t
+ao_log_full(void)
+{
+ return ao_fat_full();
+}
+
+uint8_t
+ao_log_mega(struct ao_log_mega *log)
+{
+ uint8_t wrote = 0;
+ ao_mutex_get(&log_mutex);
+ if (log->type == AO_LOG_GPS_TIME) {
+ if (log_running &&
+ (log_year != log->u.gps.year ||
+ log_month != log->u.gps.month ||
+ log_day != log->u.gps.day)) {
+ ao_log_close();
+ }
+ if (!log_running) {
+ log_year = log->u.gps.year;
+ log_month = log->u.gps.month;
+ log_day = log->u.gps.day;
+ ao_log_open();
+ }
+ }
+ if (log_running) {
+ wrote = ao_fat_write(log, sizeof (*log)) == AO_FAT_SUCCESS;
+ ao_fat_sync();
+ }
+ ao_mutex_put(&log_mutex);
+ return wrote;
+}