exam_SDreadwrite.zip_SD卡

/********************************************************************* ** Module Name: SD CARD ** ** Author: CTH ** ** Version: 1.0 ** ** CreateDate: 2009-8-10 ** ** Description: ** ** Remark: ** ** Revision History: 2009-8-10 ** ** Email: ahong007@yeah.net ** ** **********************************************************************/ /********************************************************************* ** 实验目的:使用SD卡功能对SD卡进行读写，注意SD卡必须是标准SD卡 ** ** 实验说明:SD卡插入卡座，注意不要把SD卡锁住。本实验仅仅是对SD ** ** 卡进行数组级别的读写而不是文件系统的读写，如需要文件系统 ** ** 请与大道科技或者与红尘联系。 ** **********************************************************************/ #include <csl_mmc.h> #include <stdio.h> #include <csl_pll.h> #include "mysd.h" void SdRead(Uint32 addr,Uint16* data); void SdWrite(Uint32 addr,Uint16* data); Uint16 data[256]; Uint16 fill[256]; ioport unsigned int * fckctl=(unsigned int *)0x4c00; /* 00 */ ioport unsigned int * ctl=(unsigned int *)0x4c01; /* 00 */ ioport unsigned int * clk=(unsigned int *)0x4c02; /* 00 */ ioport unsigned int * st0=(unsigned int *)0x4c03; /* 00 */ ioport unsigned int * st1=(unsigned int *)0x4c04; /* 00 */ ioport unsigned int * im=(unsigned int *)0x4c05; /* 00 */ ioport unsigned int * tor=(unsigned int *)0x4c06; /* 00 */ ioport unsigned int * tod=(unsigned int *)0x4c07; /* 00 */ ioport unsigned int * blen=(unsigned int *)0x4c08; /* 00 */ ioport unsigned int * nblk=(unsigned int *)0x4c09; /* 00 */ ioport unsigned int * nblc=(unsigned int *)0x4c0a; /* 00 */ ioport unsigned int * ddr=(unsigned int *)0x4c0b; /* 00 */ ioport unsigned int * dxr=(unsigned int *)0x4c0c; /* 00 */ ioport unsigned int * cmd=(unsigned int *)0x4c0d; /* 00 */ ioport unsigned int * argl=(unsigned int *)0x4c0e; /* 00 */ ioport unsigned int * argh=(unsigned int *)0x4c0f; /* 00 */ ioport unsigned int * rsp0=(unsigned int *)0x4c10; /* 00 */ ioport unsigned int * rsp1=(unsigned int *)0x4c11; /* 00 */ ioport unsigned int * rsp2=(unsigned int *)0x4c12; /* 00 */ ioport unsigned int * rsp3=(unsigned int *)0x4c13; /* 00 */ ioport unsigned int * rsp4=(unsigned int *)0x4c14; /* 00 */ ioport unsigned int * rsp5=(unsigned int *)0x4c15; /* 00 */ ioport unsigned int * rsp6=(unsigned int *)0x4c16; /* 00 */ ioport unsigned int * rsp7=(unsigned int *)0x4c17; /* 00 */ ioport unsigned int * drsp=(unsigned int *)0x4c18; /* 00 */ ioport unsigned int * etok=(unsigned int *)0x4c19; /* 00 */ ioport unsigned int * cidx=(unsigned int *)0x4c1a; /* 00 */ ioport unsigned int * EBSR=(unsigned int *)0x6C00; /* 00 */ void main() { int i=0; CSL_init(); for(i=0;i<256;i++) fill[i]=i; SdWrite(0x000000,fill); SdRead(0x000000,data); for(;;); } void SdWrite(Uint32 addr,Uint16* data) { mmc1 = MMC_open(MMC_DEV1); MMC_setupNative(mmc1,&Init); MMC_sendGoIdle(mmc1); for (count=0;count<4016;count++) asm(" NOP"); cardtype = MMC_sendOpCond(mmc1,0x00100000); asm(" NOP"); if(cardtype==SD_CARD) { cid = &cardid; SD_sendAllCID(mmc1,cid); // get the CID structure for all cards. asm(" NOP"); card = &cardalloc; rca = SD_sendRca(mmc1,card); asm(" NOP"); } /* Select the card to transfer data to/from. This step puts the card into the * * transfer state where it is ready to read/write data */ retVal = MMC_selectCard(mmc1,card); asm(" NOP"); /*Setting the SD bus width to 4 bits...*/ /*retVal = SD_setWidth(mmc1, 0x4);*/ MMC_write(mmc1,addr,data,512); for (count = 0; count <= 6000; ++count) asm(" NOP"); /* for (count = 0; count <= 25000; ++count) asm(" NOP"); for (count = 0; count <= 25000; ++count) asm(" NOP"); for (count = 0; count <= 25000; ++count) asm(" NOP"); */ MMC_close(mmc1); } void SdRead(Uint32 addr,Uint16* data) { mmc1 = MMC_open(MMC_DEV1); MMC_setupNative(mmc1,&Init); MMC_sendGoIdle(mmc1); for (count=0;count<4016;count++) asm(" NOP"); cardtype = MMC_sendOpCond(mmc1,0x00100000); asm(" NOP"); if(cardtype==SD_CARD) { cid = &cardid; SD_sendAllCID(mmc1,cid); // get the CID structure for all cards. asm(" NOP"); card = &cardalloc; rca = SD_sendRca(mmc1,card); asm(" NOP"); } /* Select the card to transfer data to/from. This step puts the card into the * * transfer state where it is ready to read/write data */ retVal = MMC_selectCard(mmc1,card); asm(" NOP"); /*Setting the SD bus width to 4 bits...*/ /*retVal = SD_setWidth(mmc1, 0x4);*/ MMC_read(mmc1,addr,data,512); for (count = 0; count <= 6000; ++count) asm(" NOP"); /* for (count = 0; count <= 25000; ++count) asm(" NOP"); for (count = 0; count <= 25000; ++count) asm(" NOP"); for (count = 0; count <= 25000; ++count) asm(" NOP"); */ MMC_close(mmc1); }