Bruno Cavalcanti / Mbed 2 deprecated brunoDrome

teste de publish

Dependencies:   DS1820 HighSpeedAnalogIn devices mbed

SDFileSystem/FATFileSystem/MemFileSystem.h@38:07d3907b74e5, 2018-06-08 (annotated)

Committer:
brunofgc
Date:
Fri Jun 08 22:14:21 2018 +0000
Revision:
38:07d3907b74e5
Parent:
0:1c0a769988ee 
teste de publish para compilar no mbed-cli

Who changed what in which revision?

UserRevisionLine numberNew contents of line
brunofgc 0:1c0a769988ee 1 /* mbed Microcontroller Library - MemFileSystem
brunofgc 0:1c0a769988ee 2 * Copyright (c) 2008, sford
brunofgc 0:1c0a769988ee 3 */
brunofgc 0:1c0a769988ee 4
brunofgc 0:1c0a769988ee 5
brunofgc 0:1c0a769988ee 6 #ifndef MBED_MEMFILESYSTEM_H
brunofgc 0:1c0a769988ee 7 #define MBED_MEMFILESYSTEM_H
brunofgc 0:1c0a769988ee 8
brunofgc 0:1c0a769988ee 9 #include "FATFileSystem.h"
brunofgc 0:1c0a769988ee 10
brunofgc 0:1c0a769988ee 11 namespace mbed
brunofgc 0:1c0a769988ee 12 {
brunofgc 0:1c0a769988ee 13
brunofgc 0:1c0a769988ee 14 class MemFileSystem : public FATFileSystem
brunofgc 0:1c0a769988ee 15 {
brunofgc 0:1c0a769988ee 16 public:
brunofgc 0:1c0a769988ee 17
brunofgc 0:1c0a769988ee 18 // 2000 sectors, each 512 bytes (malloced as required)
brunofgc 0:1c0a769988ee 19 char *sectors[2000];
brunofgc 0:1c0a769988ee 20
brunofgc 0:1c0a769988ee 21 MemFileSystem(const char* name) : FATFileSystem(name) {
brunofgc 0:1c0a769988ee 22 memset(sectors, 0, sizeof(sectors));
brunofgc 0:1c0a769988ee 23 }
brunofgc 0:1c0a769988ee 24
brunofgc 0:1c0a769988ee 25 virtual ~MemFileSystem() {
brunofgc 0:1c0a769988ee 26 for(int i = 0; i < 2000; i++) {
brunofgc 0:1c0a769988ee 27 if(sectors[i]) {
brunofgc 0:1c0a769988ee 28 free(sectors[i]);
brunofgc 0:1c0a769988ee 29 }
brunofgc 0:1c0a769988ee 30 }
brunofgc 0:1c0a769988ee 31 }
brunofgc 0:1c0a769988ee 32
brunofgc 0:1c0a769988ee 33 // read a sector in to the buffer, return 0 if ok
brunofgc 0:1c0a769988ee 34 virtual int disk_read(char *buffer, int sector) {
brunofgc 0:1c0a769988ee 35 if(sectors[sector] == 0) {
brunofgc 0:1c0a769988ee 36 // nothing allocated means sector is empty
brunofgc 0:1c0a769988ee 37 memset(buffer, 0, 512);
brunofgc 0:1c0a769988ee 38 } else {
brunofgc 0:1c0a769988ee 39 memcpy(buffer, sectors[sector], 512);
brunofgc 0:1c0a769988ee 40 }
brunofgc 0:1c0a769988ee 41 return 0;
brunofgc 0:1c0a769988ee 42 }
brunofgc 0:1c0a769988ee 43
brunofgc 0:1c0a769988ee 44 // write a sector from the buffer, return 0 if ok
brunofgc 0:1c0a769988ee 45 virtual int disk_write(const char *buffer, int sector) {
brunofgc 0:1c0a769988ee 46 // if buffer is zero deallocate sector
brunofgc 0:1c0a769988ee 47 char zero[512];
brunofgc 0:1c0a769988ee 48 memset(zero, 0, 512);
brunofgc 0:1c0a769988ee 49 if(memcmp(zero, buffer, 512)==0) {
brunofgc 0:1c0a769988ee 50 if(sectors[sector] != 0) {
brunofgc 0:1c0a769988ee 51 free(sectors[sector]);
brunofgc 0:1c0a769988ee 52 sectors[sector] = 0;
brunofgc 0:1c0a769988ee 53 }
brunofgc 0:1c0a769988ee 54 return 0;
brunofgc 0:1c0a769988ee 55 }
brunofgc 0:1c0a769988ee 56 // else allocate a sector if needed, and write
brunofgc 0:1c0a769988ee 57 if(sectors[sector] == 0) {
brunofgc 0:1c0a769988ee 58 char *sec = (char*)malloc(512);
brunofgc 0:1c0a769988ee 59 if(sec==0) {
brunofgc 0:1c0a769988ee 60 return 1; // out of memory
brunofgc 0:1c0a769988ee 61 }
brunofgc 0:1c0a769988ee 62 sectors[sector] = sec;
brunofgc 0:1c0a769988ee 63 }
brunofgc 0:1c0a769988ee 64 memcpy(sectors[sector], buffer, 512);
brunofgc 0:1c0a769988ee 65 return 0;
brunofgc 0:1c0a769988ee 66 }
brunofgc 0:1c0a769988ee 67
brunofgc 0:1c0a769988ee 68 // return the number of sectors
brunofgc 0:1c0a769988ee 69 virtual int disk_sectors() {
brunofgc 0:1c0a769988ee 70 return sizeof(sectors)/sizeof(sectors[0]);
brunofgc 0:1c0a769988ee 71 }
brunofgc 0:1c0a769988ee 72
brunofgc 0:1c0a769988ee 73 };
brunofgc 0:1c0a769988ee 74
brunofgc 0:1c0a769988ee 75 }
brunofgc 0:1c0a769988ee 76
brunofgc 0:1c0a769988ee 77 #endif