用51单片机读写SD卡

2012.1151SDSD，。MP3、SD。SD，、、、。，，。SD。SD，，SD、。1SDSDSD，、。1．1SDSD1，1。SD，SD，SPI。，。SDSD，SPI。SPI，SPI，，，SD，SPI。1．2SPISPI，，SDS。SDCMDACMD，，。，CMD17，。SPI，26。“01”，64(，)，7CRC1“1”。SD。SPI，3：R1、R2R3，1、23。R1，3。，1。R2R31R1，SD。1SD（SD）（SPI）1DAT3/CS3/（SS）2CMD/DI（MOSI）3VSS14VDD5CLK（SCK）6VSS27DAT0/DO0（MISO）8DAT1/IRQ19DAT2/NC21SD7，06543CRC3R1：SD，SPI51SD。：51；SD；2-5601CRC12PROGRAMLANGUAGE19210251STC89C52SD，SPI，4P14，P15，P16，P17。515V，SD3.3V，。SD7DO，3.3V51，。2。3SPI，SD，SD、SD。3．1SPI//=======================================//SD,SPIvoidSD_spi_write(unsignedcharn){unsignedchari;for(i=0;i8;i++){SD_CLK=0;if(is_init)delay(DELAY_TIME);SD_DI=(n&0x80)7;SD_CLK=1;if(is_init)delay(DELAY_TIME);n=1;}}//======================================//SD,SPIunsignedcharSD_spi_read(){unsignedcharn,i;for(i=0;i8;i++){n=1;SD_CLK=0;if(is_init)delay(DELAY_TIME);SD_DO=1;if(SD_DO)n|=1;SD_CLK=1;if(is_init)delay(DELAY_TIME);}returnn;}3．2SDSD，。，R1，R1。3．3SD//========================================//SDunsignedcharSdCommand(unsignedcharcommand,unsignedlongargument,unsignedcharCRC){unsignedchartemp,time=0;SD_CS=1;SD_spi_write(0xff);//，，SDSD_CS=0;SD_spi_write(command|0x40);SD_spi_write(((unsignedchar*)&argument)[0]);SD_spi_write(((unsignedchar*)&argument)[1]);SD_spi_write(((unsignedchar*)&argument)[2]);SD_spi_write(((unsignedchar*)&argument)[3]);SD_spi_write(CRC);do{temp=SD_spi_read();//，0xfftime++;}while((temp==0xff)&&(timeTRY_TIME));return(temp);}SD。SPI2DAT2/NCDAT3/CSCMD/DIVSS1VDDCLK/SCKVSS2DAT0/DODAT1/IRQ202012.11400kHz，74。，CMD0，SDSPI，CRC，0x95。SD(0x01)，CMD1，，0x00。，512。SPI，。SD3。SD：/************************************************-：SD，CMD0，SDSPI-：SD-：，-：-：，0x00，INIT_CMD0_ERROR(sd.h)***********************************************/externunsignedcharis_init;unsignedcharSD_Reset()//SD，SPI，//CMD0（0）{unsignedchari,time,temp;is_init=1;//is_init1SD_CS=1;for(i=0;i0x0f;i++)//，74，//！！！SD_spi_write(0xff);//120SD_CS=0;//time=0;do{temp=SdCommand(0x00,0,0x95);//CMD0//UART_Send_Byte(temp);//time++;if(time==TRY_TIME){SD_CS=1;//return(INIT_CMD0_ERROR);//CMD0}}while(temp!=0x01);SD_CS=1;//SD_spi_write(0xff);//SD8return0;//0,}SD：/**********************************************-：SD，CMD1-：SD-：，-：-：，0x00，INIT_CMD1_ERROR(sd.h)*********************************************/externunsignedcharis_init;unsignedcharSD_Init()//，CMD1（1）{unsignedchartime,temp;SD_CS=0;//time=0;do{temp=SdCommand(0x01,0,0xff);//UART_Send_Byte(temp);//time++;if(time==TRY_TIME){SD_CS=1;//return(INIT_CMD1_ERROR);//CMD1}}while(temp!=0);is_init=0;//，is_init0,//SD_CS=1;//SD_spi_write(0xff);//SD8return(0);//0,}3．4SDSPI，。4。，MCF51QE128CMD17，SD。0xfe，SD512，2CRC。：/*************************************************3SD4PROGRAMLANGUAGE21-：addr512buffer-：SD-：，-：addr:buffer:-：，0x00，READ_BLOCK_ERROR(sd.h)-：SD，，SPI，***********************************************/unsignedcharSD_Read_Sector(unsignedlongaddr,unsignedchar*buffer)//SD512，//CMD17（17）{unsignedintj;unsignedchartime,temp;SD_CS=0;//time=0;do{//addr=addr*512（）temp=SdCommand(17,addr9,0xff);//CMD17time++;if(time==TRY_TIME){return(READ_BLOCK_ERROR);//}}while(temp!=0);//0while(SD_spi_read()!=0xfe);//，0xfe，//512for(j=0;j512;j++)//{buffer[j]=SD_spi_read();}SD_spi_read();SD_spi_read();//CRC，SD_CS=1;//SDSD_spi_read();//SD8return0;}。MCF51QE128CMD24，SD0xfe，5122CRC。，SD1，5。SD，0x05。，，。：/***********************************************-：buffer512SDaddr-：SD-：，-：addr:buffer:-：，0x00，WRITE_BLOCK_ERROR(sd.h)-：SD，，SPI，**********************************************/unsignedcharSD_Write_Sector(unsignedlongaddr,unsignedchar*buffer)//SD512//，CMD24（24）{unsignedchartemp,time;unsignedinti;//UART_Send_Byte(is_init);SD_CS=0;//SDtime=0;do{//addr=addr*512（）［//SD4G］temp=SdCommand(24,addr9,0xff);//CMD24time++;if(time==TRY_TIME){//UART_Send_Str();SD_CS=1;//return(temp);//}}while(temp!=0);//0SD_spi_write(0xff);SD_spi_write(0xff);SD_spi_write(0xff);//SD_spi_write(0xfe);//0xfe，//512for(i=0;i512;i++)//512SDSD_spi_write(buffer[i]);SD_spi_write(0xff);SD_spi_write(0xff);//CRC，temp=SD_spi_read();//5（28）226//UART_Send_Byte(temp);if((temp&0x1F)!=0x05)//XXX00101//SD{//UART_Send_Str();SD_CS=1;return(WRITE_BLOCK_ERROR);//}while(SD_spi_read()==0x00);//SD（//，SDFLASH，//）//，0x00,，0xffSD_CS=1;//SD_spi_write(0xff);//SD8return(0);//0,}，SD621，701，80。，701，，。：for(i=0;i80;i++){SD_Read_Sector(621+i,DATA);SD_Write_Sector(701+i,DATA);}6。（：2012-02-12）}privatestaticIUnityContainerBuildUnityContainer(){varcontainer=newUnityContainer().RegisterTypeIDatabaseFactory,DatabaseFactory(newHierarchicalLifetimeManager()).RegisterTypeIUnitOfWork,UnitOfWork().RegisterTypeIReaderService,ReaderService()…//.RegisterTypeIRepositoryReader,ReaderRepository();container.RegisterControllers();returncontainer;}Global.asax：protectedvoidApplication_Start(){…//Bootstrapper.Initialise();}，Web，WinForm，PDA，，。，，JS、JQuery、Ajax、DIV+CSS、AS-Flash、、、、、，。6Web，，，，，，“”“”，，、、、。[1]()EricEvans---[M]，，：，2006.[2]()TimMcCarthC#2008[M]UMLChina，：，2010.[3]()MartinFowler[M]，，：，2011.[4][EB/OL]，2010.[5]EntityFramework4.1[E