sd.rar_51 sd_SD_sd card write_sd卡驱动源码_sd程序

#include "common.h" #include "DEVICE.H" #include "HPI.H" #include "HAL.H" #include "Fat.h" #include "Fat32.h" #include "HPI32.H" extern FLAGS bdata bFlags; extern unsigned char xdata DBUF[BUFFER_LENGTH]; ////////////////////////////////////////// unsigned char xdata UARTBUF[UARTBUF_LENGTH]; SYS_INFO_BLOCK xdata DeviceInfo; FILE_INFO xdata ThisFile; Command_Def xdata Command; Response_Def xdata Response; unsigned int xdata DirStartCluster,NowCluster; unsigned long xdata NowSector; ShowFileName_Def xdata ShowFileName[MaxLFNum]; //long file struct ///////////////////////////////////////////// void UartSendRsp(void) { unsigned int i; unsigned char *pBuf=(unsigned char *)&Response; MCU_LED4=0; for(i=0;i<5;i++) ComSendByte(*(pBuf+i)); if(Response.len!=0) { for(i=0;i<Response.len;i++) ComSendByte(UARTBUF[i]); } MCU_LED4=1; } unsigned char UartHandler(void) { Response.Result=0;Response.len=0; switch(Command.CLass) { case 0x00: //List Response.Result=List(); break; case 0x01: //Open File Response.Result=OpenFile(Command.Parameter); break; case 0x02: //Read File Response.Result=ReadFile(Command.len,UARTBUF); break; case 0x03: //Set Pointer Response.Result=SetFilePointer(Command.len); break; case 0x04: //Great File Response.Result=OpenFile(Command.Parameter); if(Response.Result) { Response.Result=SetFilePointer(ThisFile.LengthInByte); } else Response.Result=CreateFile(Command.len,Command.Parameter,UARTBUF); break; case 0x05: //Write File Response.Result=WriteFile(Command.len,UARTBUF); break; case 0x06: //Remove File ThisFile.bFileOpen=0; Response.Result=RemoveFile(Command.Parameter); break; case 0x07: //Get Space Response.Result=GetCapacity(); break; case 0x08: //DetectDisk if(bFlags.bits.SLAVE_IS_ATTACHED) Response.Result=1; break; case 0x09: //Great Dir Response.Result=DownDir(Command.Parameter); if(!Response.Result) Response.Result=CreateDir(Command.len,Command.Parameter,UARTBUF); break; case 0x0a: //Down Dir Response.Result=DownDir(Command.Parameter); break; case 0x0b: //Up Dir Response.Result=UpDir(); break; case 0x0c: //Up RootDir Response.Result=UpRootDir(); break; } UartSendRsp(); /////////////////////////////// return TRUE; } unsigned char List(void) { unsigned int item,i; unsigned char k,bstop,sector; unsigned char Lcount,Ncount,base; if(!bFlags.bits.SLAVE_IS_ATTACHED) return FALSE; item=0; bstop=0; //////////////////////////////////// Lcount=0; for(i=0;i<MaxLFNum;i++) { ShowFileName[i].LongName[0]=0x00; ShowFileName[i].LongName[1]=0x00; } ///////////////////////////////////// if(DirStartCluster==0) //Root Dir { for(sector=0;sector<DeviceInfo.BPB_RootEntCnt;sector++) { if(!SdReadSector(DeviceInfo.RootStartSector+sector,1,DBUF)) return FALSE; for(i=0;i<DeviceInfo.BPB_BytesPerSec;i=i+32) { if(DBUF[i]==0x00) {bstop=1; break;} else if(DBUF[i]==0xE5) continue; else { for(k=0;k<32;k++) UARTBUF[item*32+k]=DBUF[i+k]; item=item+1; if(item>=(UARTBUF_LENGTH/32)) {bstop=1;break;} //串口缓冲 只能有512项目录，强行结束 ///////////////////////////////// if(Lcount<MaxLFNum) { if(DBUF[i+11]==0x0F) { base=((DBUF[i]&0x1F)-1)*26; if(base<=224) { Ncount=0; for(k=1;k<11;k++) { ShowFileName[Lcount].LongName[base+Ncount]=DBUF[i+k]; Ncount++; } for(k=14;k<26;k++) { ShowFileName[Lcount].LongName[base+Ncount]=DBUF[i+k]; Ncount++; } for(k=28;k<32;k++) { ShowFileName[Lcount].LongName[base+Ncount]=DBUF[i+k]; Ncount++; } } } else { for(k=0;k<32;k++) ShowFileName[Lcount].item[k]=DBUF[i+k]; Lcount++; } }//if(Lcount<MaxLFNum) ///////////////////////////////// } } if(bstop==1)break; } Response.len=item*32; return TRUE; } ////////////////////////////////////////////////////////////////// else //Son Dir { NowCluster=DirStartCluster; do { NowSector=FirstSectorofCluster(NowCluster); for(sector=0;sector<DeviceInfo.BPB_SecPerClus;sector++) { if(!SdReadSector(NowSector+sector,1,DBUF)) return FALSE; for(i=0;i<DeviceInfo.BPB_BytesPerSec;i=i+32) { if(DBUF[i]==0x00) {bstop=1;break;} else if(DBUF[i]==0xE5) continue; else { for(k=0;k<32;k++) UARTBUF[item*32+k]=DBUF[i+k]; item=item+1; ///////////////////////////////// if(DBUF[i+11]==0x0F) { base=((DBUF[i]&0x1F)-1)*26; if(base<=224) { Ncount=0; for(k=1;k<11;k++) { ShowFileName[Lcount].LongName[base+Ncount]=DBUF[i+k]; Ncount++; } for(k=14;k<26;k++) { ShowFileName[Lcount].LongName[base+Ncount]=DBUF[i+k]; Ncount++; } for(k=28;k<32;k++) { ShowFileName[Lcount].LongName[base+Ncount]=DBUF[i+k]; Ncount++; } } } else { for(k=0;k<32;k++) ShowFileName[Lcount].item[k]=DBUF[i+k]; Lcount++; } ///////////////////////////////// } } if(bstop==1)break; } if(bstop==1)break; NowCluster=GetNextClusterNum(NowCluster); }while(NowCluster<=0xffef); Response.len=item*32; return TRUE; } } unsigned char OpenFile(unsigned char *pBuffer) { unsigned int i; unsigned char j,bstop,sector; if(!bFlags.bits.SLAVE_IS_ATTACHED) return FALSE; ThisFile.bFileOpen=0; if(DirStartCluster==0) //Root Dir { for(sector=0;sector<DeviceInfo.BPB_RootEntCnt;sector++) { if(!SdReadSector(DeviceInfo.RootStartSector+sector,1,DBUF)) return FALSE; for(i=0;i<DeviceInfo.BPB_BytesPerSec;i=i+32) { if(DBUF[i]==0x00) return FALSE; j=0; while(DBUF[i+j]==*(pBuffer+j)) { j=j+1; if(j>10) break; } if(j>10&&(DBUF[i+11]&0x10)!=0x10) { for(j=0;j<32;j++) UARTBUF[j]=DBUF[i+j]; bstop=1; break;} } if(bstop==1)break; } if(sector>=DeviceInfo.BPB_RootEntCnt) return FALSE; } /////////////////////////////////////////////////////////////////////////////////////// else { NowCluster=DirStartCluster; do { NowSector=FirstSectorofCluster(NowCluster); for(sector=0;sector<DeviceInfo.BPB_SecPerClus;sector++) { if(!SdReadSector(NowSector+sector,1,DBUF)) return FALSE; for(i=0;i<DeviceInfo.BPB_BytesPerSec;i=i+32) { if(DBUF[i]==0x00) return FALSE; j=0; while(DBUF[i+j]==*(pBuffer+j)) { j=j+1; if(j>10) break; } if(j>10&&(DBUF[i+11]&0x10)!=0x10) { for(j=0;j<32;j++) UARTBUF[j]=DBUF[i+j]; bstop=1; break; } } if(bstop==1)break; } if(bstop==1)break; NowCluster=GetNextClusterNum(NowCluster); }while(NowCluster<=0xffef); if(NowCluster>0xffef) return FALSE; } ThisFile.bFileOpen=1; ThisFile.StartCluster=LSwapINT16(UARTBUF[26],UARTBUF[27]); ThisFile.LengthInByte=LSwapINT32(UARTBUF[28],UARTBUF[29],UARTBUF[30],UARTBUF[31]); ThisFile.ClusterPointer=ThisFile.StartCluster; ThisFile.SectorPointer=FirstSectorofCluster(ThisFile.StartCluster); ThisFile.OffsetofSector=0; ThisFile.SectorofCluster=0; ThisFile.FatSectorPointer=0; ThisFile.pointer=0; Response.len=32; r