Espresso 0.0.1b

include/fs/fat16.h

@@ -0,0 +1,38 @@
+#ifndef _FAT16_H
+#define _FAT16_H
+
+#include <types.h>
+
+#define FAT16_MAX_FILENAME  256
+#define FAT16_ATTR_DIRECTORY 0x10
+
+typedef struct {
+    uint8_t drive;
+    uint32_t fat_start;
+    uint32_t root_dir_start;
+    uint32_t data_start;
+    uint16_t bytes_per_sector;
+    uint8_t sectors_per_cluster;
+    uint16_t root_entry_count;
+    uint32_t current_dir_cluster;
+} fat16_t;
+
+typedef struct {
+    char name[FAT16_MAX_FILENAME];
+    uint8_t attr;
+    uint32_t cluster;
+    uint32_t size;
+} fat16_dir_entry_t;
+
+int32_t fat16_init(uint8_t drive);
+
+uint32_t cluster_to_lba(uint16_t cluster);
+uint16_t fat16_get_fat_entry(uint16_t cluster);
+uint16_t fat16_alloc_cluster(void);
+
+int32_t fat16_list_dir(fat16_dir_entry_t* entries, size_t max_entries);
+int32_t fat16_change_dir(const char* dirname);
+int32_t fat16_read_file(const char* filename, void* buffer, size_t max_size);
+int32_t fat16_write_file(const char* filename, const void* data, size_t size);
+
+#endif