55 lines
1.4 KiB
C
55 lines
1.4 KiB
C
#include "fat32.h"
|
|
|
|
#include <devices/sd_card.h>
|
|
#include <conio.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
|
|
int8_t fat32_read_cluster(uint32_t cluster, void* buf) {
|
|
uint8_t error;
|
|
uint32_t addr = (cluster - 2) + data_start_sector;
|
|
SD_readSingleBlock(addr, buf, &error);
|
|
return error;
|
|
}
|
|
|
|
uint32_t fat32_next_cluster(uint32_t cluster) {
|
|
uint8_t error;
|
|
uint32_t addr = fat_start_sector;
|
|
uint32_t cluster_val;
|
|
SD_readSingleBlock(addr, sd_buf, &error);
|
|
cluster_val = ((uint32_t*)sd_buf)[cluster];
|
|
return cluster_val;
|
|
}
|
|
|
|
int8_t fat32_get_cluster_by_name(char* name, struct fat32_directory_entry* dentry) {
|
|
struct fat32_directory_entry* local_entry;
|
|
int i = 0;
|
|
|
|
uint32_t cluster;
|
|
|
|
cluster = fat32_next_cluster(root_cluster);
|
|
|
|
cprintf("Sectors per cluster: %hhx\n", sectors_per_cluster);
|
|
|
|
fat32_read_cluster(root_cluster, sd_buf);
|
|
for (i = 0; i < 16; i++){
|
|
local_entry = sd_buf + i*32;
|
|
if (local_entry->attr1 == 0xf || local_entry->attr1 & 0x8 || !local_entry->attr1) {
|
|
continue;
|
|
}
|
|
cprintf("Name: %.11s\n", local_entry->file_name, local_entry->file_ext);
|
|
if (!strncmp(local_entry->file_name, name, 11)) {
|
|
i = -1;
|
|
break;
|
|
}
|
|
}
|
|
if (i != -1) {
|
|
cprintf("Failed to find file.\n");
|
|
return -1;
|
|
}
|
|
|
|
cprintf("Found file!\n");
|
|
memcpy(dentry, local_entry, 32);
|
|
return 0;
|
|
}
|