87 lines
1.6 KiB
C
87 lines
1.6 KiB
C
/*
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* fs.c
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*/
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#include <stddef.h>
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#include "fs.h"
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#include "fatfs/ff.h"
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static FATFS fs;
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int mountSD()
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{
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if (f_mount(&fs, "0:", 1) != FR_OK) {
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//printF("Failed to mount SD card!");
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return 1;
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}
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//printF("Mounted SD card");
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return 0;
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}
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int fileReadOffset(u8 *dest, const char *path, u32 size, u32 offset){
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FRESULT fr;
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FIL fp;
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unsigned int br = 0;
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fr = f_open(&fp, path, FA_READ);
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if (fr != FR_OK)goto error;
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if (!size) size = f_size(&fp);
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if (offset) {
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fr = f_lseek(&fp, offset);
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if (fr != FR_OK) goto error;
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}
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fr = f_read(&fp, dest, size, &br);
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if (fr != FR_OK) goto error;
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fr = f_close(&fp);
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if (fr != FR_OK) goto error;
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return 0;
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error:
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f_close(&fp);
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return fr;
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}
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int fileRead(u8 *dest, const char *path, u32 size){
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return fileReadOffset(dest, path, size, 0);
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}
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int fileWrite(const u8 *buffer, const char *path, u32 size){
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FRESULT fr = 1;
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FIL fp;
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unsigned int br = 0;
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f_unlink(path);
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if(f_open(&fp, path, FA_WRITE | FA_OPEN_ALWAYS) == FR_OK){
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fr = f_write(&fp, buffer, size, &br);
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f_close(&fp);
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if (fr == FR_OK && br == size) return 0;
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}
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return fr;
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}
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int fileSize(const char* path){
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FRESULT fr;
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FIL fp;
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int size = 0;
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fr = f_open(&fp, path, FA_READ);
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if (fr != FR_OK)goto error;
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size = f_size(&fp);
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error:
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f_close(&fp);
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return size;
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}
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int fileExists(const char* path){
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FRESULT fr;
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FIL fp;
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int exists = 1;
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fr = f_open(&fp, path, FA_READ);
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if (fr != FR_OK)exists = 0;
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f_close(&fp);
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return exists;
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} |