From a0a958396dfcb47aa2d71e2e8366377834cee99c Mon Sep 17 00:00:00 2001
From: Olivier Matz <zer0@droids-corp.org>
Date: Thu, 17 Jul 2014 19:55:38 +0200
Subject: [PATCH] add missing sd_log.[ch] files

---
 sd_log.c | 139 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 sd_log.h |   7 +++
 2 files changed, 146 insertions(+)
 create mode 100644 sd_log.c
 create mode 100644 sd_log.h

diff --git a/sd_log.c b/sd_log.c
new file mode 100644
index 0000000..4659936
--- /dev/null
+++ b/sd_log.c
@@ -0,0 +1,139 @@
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <aversive/pgmspace.h>
+
+#include "fat.h"
+#include "fat_config.h"
+#include "partition.h"
+#include "sd_raw.h"
+#include "sd_raw_config.h"
+#include "sd_log.h"
+
+static struct fat_file_struct *log_fd = NULL;
+
+uint8_t find_file_in_dir(struct fat_fs_struct* fs,
+	struct fat_dir_struct* dd, const char* name,
+	struct fat_dir_entry_struct* dir_entry)
+{
+	(void)fs;
+
+	while(fat_read_dir(dd, dir_entry)) {
+		if(strcmp(dir_entry->long_name, name) == 0) {
+			fat_reset_dir(dd);
+			return 1;
+		}
+	}
+
+	return 0;
+}
+
+struct fat_file_struct *open_file_in_dir(struct fat_fs_struct* fs,
+	struct fat_dir_struct* dd, const char* name)
+{
+	struct fat_dir_entry_struct file_entry;
+
+	if(!find_file_in_dir(fs, dd, name, &file_entry))
+		return 0;
+
+	return fat_open_file(fs, &file_entry);
+}
+
+struct fat_file_struct *open_log_file(void)
+{
+	struct fat_file_struct *fd;
+	struct fat_fs_struct *fs;
+	struct partition_struct *partition ;
+	struct fat_dir_struct *dd;
+	struct fat_dir_entry_struct directory;
+	struct fat_dir_entry_struct file_entry;
+	int16_t i = 0;
+	char name[16];
+
+	/* setup sd card slot */
+	if (!sd_raw_init()) {
+#if SD_DEBUG
+		printf_P(PSTR("MMC/SD initialization failed\n"));
+#endif
+		return NULL;
+	}
+
+	/* open first partition */
+	partition = partition_open(sd_raw_read,
+		sd_raw_read_interval,
+#if SD_RAW_WRITE_SUPPORT
+		sd_raw_write, sd_raw_write_interval,
+#else
+		0, 0,
+#endif
+		0);
+
+	if (!partition) {
+		/* If the partition did not open, assume the storage device
+		 * is a "superfloppy", i.e. has no MBR.
+		 */
+		partition = partition_open(sd_raw_read,
+			sd_raw_read_interval,
+#if SD_RAW_WRITE_SUPPORT
+			sd_raw_write,
+			sd_raw_write_interval,
+#else
+			0,
+			0,
+#endif
+			-1);
+		if (!partition) {
+#if SD_DEBUG
+			printf_P(PSTR("opening partition failed\n"));
+#endif
+			return NULL;
+		}
+	}
+
+	/* open file system */
+	fs = fat_open(partition);
+	if (!fs) {
+#if SD_DEBUG
+		printf_P(PSTR("opening filesystem failed\n"));
+#endif
+		return NULL;
+	}
+
+	/* open root directory */
+	fat_get_dir_entry_of_path(fs, "/", &directory);
+	dd = fat_open_dir(fs, &directory);
+	if (!dd) {
+#if SD_DEBUG
+		printf_P(PSTR("opening root directory failed\n"));
+#endif
+		return NULL;
+	}
+
+	/* print some card information as a boot message */
+	//print_disk_info(fs);
+
+	printf("choose log file name\n");
+	while (1) {
+		snprintf(name, sizeof(name), "log%.4d", i++);
+		if (!find_file_in_dir(fs, dd, name, &file_entry))
+			break;
+	}
+
+	printf("create log file %s\n", name);
+	if (!fat_create_file(dd, name, &file_entry)) {
+		printf_P(PSTR("error creating file: "));
+	}
+
+	fd = open_file_in_dir(fs, dd, name);
+	if (!fd) {
+		printf_P(PSTR("error opening "));
+		return NULL;
+	}
+
+	return fd;
+}
+
+struct fat_file_struct *get_log_file(void)
+{
+	return log_fd;
+}
diff --git a/sd_log.h b/sd_log.h
new file mode 100644
index 0000000..d2333e2
--- /dev/null
+++ b/sd_log.h
@@ -0,0 +1,7 @@
+#ifndef SD_LOG_H_
+#define SD_LOG_H_
+
+struct fat_file_struct *open_log_file(void);
+struct fat_file_struct *get_log_file(void);
+
+#endif
-- 
2.39.5