基于单片机的SD卡FAT32文件系统

void FolderDis_KeyNext(uchar *p) { uchar i=0; uchar s[16]; for(i=0;i<16;i++)s[i]=0x20; if(FolderJudge(p)) { FileName_Read(s,p); LCD_DIS_upline(s); addr_Folder++; for(i=0;i<16;i++)s[i]=0x20; if(FolderJudge(p)) { FileName_Read(s,p); LCD_DIS_downline(s); addr_Folder++; } } else { LCD_DIS_char(0,0,0x20); LCD_DIS_char(1,0,0x7e); } bit FolderJudge(uchar *p) { bit flag; while(1) { if(addr_Folder==ClusLast) {flag=0;break;} else if(*(p+addr_Folder)==0x00){flag=0;break;} else if(*(p+addr_Folder)==0xe5){++addr_Folder;} else if(*(p+addr_Folder+0x0b)==0x0f){++addr_Folder;} else {flag=1;break;} } return(flag); } //****************************************************** //****************************************************** //****************************************************** void FolderDis(uchar *p) { uchar s[16]; FileName_Read(s,p); LCD_DIS_upline(s); addr_Folder+=32; FileName_Read(s,p); LCD_DIS_downline(s); } //****************************************************** //****************************************************** //****************************************************** void FileName_Read(uchar *s,uchar *p) { uchar i=0; for(i=0;i<16;i++)s[i]=0x20; while(1){if(*(p+addr_Folder)!=0xe5) break;else addr_Folder+=32;} for(i=0;i<8;i++) s[i+1]=p[i+addr_Folder]; if(p[addr_Folder+0x0b]!=0x10) { i=FileName_Sort(&s[1])+2; s[i]=0x2e; i++;s[i]=p[addr_Folder+0x08]; i++;s[i]=p[addr_Folder+0x09]; i++;s[i]=p[addr_Folder+0x0a]; } }