1 files changed, 95 insertions, 0 deletions
diff --git a/src/drivers/ao_log_fat.c b/src/drivers/ao_log_fat.c
new file mode 100644
index 00000000..af77401c
--- /dev/null
+++ b/src/drivers/ao_log_fat.c
@@ -0,0 +1,95 @@
+/*
+ * 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_open;
+static int8_t	log_fd;
+static uint8_t	log_mutex;
+
+static void
+ao_log_open(void)
+{
+	char	name[12];
+	int8_t	status;
+
+	sprintf(name,"%04d%02d%02dLOG", 2000 + log_year, log_month, log_day);
+	status = ao_fat_open(name, AO_FAT_OPEN_WRITE);
+	if (status >= 0) {
+		log_fd = status;
+		ao_fat_seek(log_fd, 0, AO_FAT_SEEK_END);
+		log_open = 1;
+	} else if (status == -AO_FAT_ENOENT) {
+		status = ao_fat_creat(name);
+		if (status == AO_FAT_SUCCESS) {
+			log_fd = status;
+			log_open = 1;
+		}
+	} 
+}
+
+static void
+ao_log_close(void)
+{
+	if (log_open) {
+		log_open = 0;
+		ao_fat_close(log_fd);
+		log_fd = -1;
+	}
+}
+
+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_open &&
+		    (log_year != log->u.gps.year ||
+		     log_month != log->u.gps.month ||
+		     log_day != log->u.gps.day)) {
+			ao_log_close();
+		}
+		if (!log_open) {
+			log_year = log->u.gps.year;
+			log_month = log->u.gps.month;
+			log_day = log->u.gps.day;
+			ao_log_open();
+		}
+	}
+	if (log_open) {
+		wrote = ao_fat_write(log_fd, log, sizeof (*log)) == AO_FAT_SUCCESS;
+		ao_fat_sync();
+	}
+	ao_mutex_put(&log_mutex);
+	return wrote;
+}
+
+void
+ao_log_flush(void)
+{
+	ao_fat_sync();
+}