Ahmed Adamjee / Mbed 2 deprecated SnakeVSBlock

Snake vs Block Game to be run upon K64F.

Dependencies:   mbed

MenuClasses/Stats/SDFileSystem/FATFileSystem/MemFileSystem.h@104:17040265b7b4, 2019-05-09 (annotated)

Committer:
AhmedPlaymaker
Date:
Thu May 09 14:52:19 2019 +0000
Revision:
104:17040265b7b4
Parent:
51:387249f9b333 
Final Submission. I have read and agreed with Statement of Academic Integrity.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AhmedPlaymaker 33:249cf423fb18 1 /* mbed Microcontroller Library - MemFileSystem
AhmedPlaymaker 33:249cf423fb18 2 * Copyright (c) 2008, sford
AhmedPlaymaker 33:249cf423fb18 3 */
AhmedPlaymaker 33:249cf423fb18 4
AhmedPlaymaker 33:249cf423fb18 5
AhmedPlaymaker 33:249cf423fb18 6 #ifndef MBED_MEMFILESYSTEM_H
AhmedPlaymaker 33:249cf423fb18 7 #define MBED_MEMFILESYSTEM_H
AhmedPlaymaker 33:249cf423fb18 8
AhmedPlaymaker 33:249cf423fb18 9 #include "FATFileSystem.h"
AhmedPlaymaker 33:249cf423fb18 10
AhmedPlaymaker 33:249cf423fb18 11 namespace mbed
AhmedPlaymaker 33:249cf423fb18 12 {
AhmedPlaymaker 33:249cf423fb18 13
AhmedPlaymaker 33:249cf423fb18 14 class MemFileSystem : public FATFileSystem
AhmedPlaymaker 33:249cf423fb18 15 {
AhmedPlaymaker 33:249cf423fb18 16 public:
AhmedPlaymaker 33:249cf423fb18 17
AhmedPlaymaker 33:249cf423fb18 18 // 2000 sectors, each 512 bytes (malloced as required)
AhmedPlaymaker 33:249cf423fb18 19 char *sectors[2000];
AhmedPlaymaker 33:249cf423fb18 20
AhmedPlaymaker 33:249cf423fb18 21 MemFileSystem(const char* name) : FATFileSystem(name) {
AhmedPlaymaker 33:249cf423fb18 22 memset(sectors, 0, sizeof(sectors));
AhmedPlaymaker 33:249cf423fb18 23 }
AhmedPlaymaker 33:249cf423fb18 24
AhmedPlaymaker 33:249cf423fb18 25 virtual ~MemFileSystem() {
AhmedPlaymaker 33:249cf423fb18 26 for(int i = 0; i < 2000; i++) {
AhmedPlaymaker 33:249cf423fb18 27 if(sectors[i]) {
AhmedPlaymaker 33:249cf423fb18 28 free(sectors[i]);
AhmedPlaymaker 33:249cf423fb18 29 }
AhmedPlaymaker 33:249cf423fb18 30 }
AhmedPlaymaker 33:249cf423fb18 31 }
AhmedPlaymaker 33:249cf423fb18 32
AhmedPlaymaker 33:249cf423fb18 33 // read a sector in to the buffer, return 0 if ok
AhmedPlaymaker 33:249cf423fb18 34 virtual int disk_read(char *buffer, int sector) {
AhmedPlaymaker 33:249cf423fb18 35 if(sectors[sector] == 0) {
AhmedPlaymaker 33:249cf423fb18 36 // nothing allocated means sector is empty
AhmedPlaymaker 33:249cf423fb18 37 memset(buffer, 0, 512);
AhmedPlaymaker 33:249cf423fb18 38 } else {
AhmedPlaymaker 33:249cf423fb18 39 memcpy(buffer, sectors[sector], 512);
AhmedPlaymaker 33:249cf423fb18 40 }
AhmedPlaymaker 33:249cf423fb18 41 return 0;
AhmedPlaymaker 33:249cf423fb18 42 }
AhmedPlaymaker 33:249cf423fb18 43
AhmedPlaymaker 33:249cf423fb18 44 // write a sector from the buffer, return 0 if ok
AhmedPlaymaker 33:249cf423fb18 45 virtual int disk_write(const char *buffer, int sector) {
AhmedPlaymaker 33:249cf423fb18 46 // if buffer is zero deallocate sector
AhmedPlaymaker 33:249cf423fb18 47 char zero[512];
AhmedPlaymaker 33:249cf423fb18 48 memset(zero, 0, 512);
AhmedPlaymaker 33:249cf423fb18 49 if(memcmp(zero, buffer, 512)==0) {
AhmedPlaymaker 33:249cf423fb18 50 if(sectors[sector] != 0) {
AhmedPlaymaker 33:249cf423fb18 51 free(sectors[sector]);
AhmedPlaymaker 33:249cf423fb18 52 sectors[sector] = 0;
AhmedPlaymaker 33:249cf423fb18 53 }
AhmedPlaymaker 33:249cf423fb18 54 return 0;
AhmedPlaymaker 33:249cf423fb18 55 }
AhmedPlaymaker 33:249cf423fb18 56 // else allocate a sector if needed, and write
AhmedPlaymaker 33:249cf423fb18 57 if(sectors[sector] == 0) {
AhmedPlaymaker 33:249cf423fb18 58 char *sec = (char*)malloc(512);
AhmedPlaymaker 33:249cf423fb18 59 if(sec==0) {
AhmedPlaymaker 33:249cf423fb18 60 return 1; // out of memory
AhmedPlaymaker 33:249cf423fb18 61 }
AhmedPlaymaker 33:249cf423fb18 62 sectors[sector] = sec;
AhmedPlaymaker 33:249cf423fb18 63 }
AhmedPlaymaker 33:249cf423fb18 64 memcpy(sectors[sector], buffer, 512);
AhmedPlaymaker 33:249cf423fb18 65 return 0;
AhmedPlaymaker 33:249cf423fb18 66 }
AhmedPlaymaker 33:249cf423fb18 67
AhmedPlaymaker 33:249cf423fb18 68 // return the number of sectors
AhmedPlaymaker 33:249cf423fb18 69 virtual int disk_sectors() {
AhmedPlaymaker 33:249cf423fb18 70 return sizeof(sectors)/sizeof(sectors[0]);
AhmedPlaymaker 33:249cf423fb18 71 }
AhmedPlaymaker 33:249cf423fb18 72
AhmedPlaymaker 33:249cf423fb18 73 };
AhmedPlaymaker 33:249cf423fb18 74
AhmedPlaymaker 33:249cf423fb18 75 }
AhmedPlaymaker 33:249cf423fb18 76
AhmedPlaymaker 33:249cf423fb18 77 #endif