ch375读U盘
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51+ch375UflqMfl()
E?2005-10-16 19:50:00
7*S±*M$ 180ffC flSWflFAT 16tffSUfl cW
flif i ,1ritunwffiTmn JS+*MW1W1NDOWStFAT 164t4-I flJU, YSJ*M*IM31 LAFflikilit5O% ±ftiU CH375AfrtjiiUfl?MEW185%,O*1tTh WCH J tIEtft&*fl
flTUflIt:flfl64M/flfl128MfU16O-64MJt& 128M,fl/i
fl16M/fl,
I! f/64M,1&N/64M, MI32M/64MI128M, Z/C200-64M$?*4/256M,:1±7128M..., 503W
fl4ttM*
fl128M,?]Rt3!USB2.0-1 28M, ,4N1W CH flW)CH375A *1
4 i nclude
4 i nclude “CH375INC.H”
#include
#define UNT8 unsigned that
#define Ull?TT 16 unsigned short
#define UUTT32 unsigned long
#define UII?TT8X unsigned char xdata
#define Ull?JT8VX unsigned char volatile xdata
UINT8VX CH375 CMD PORT atOxBDFl;1* CH375*tFE1flIJO*thtlE *7
U1NT8VX CH375 DAT PORT at OxBCFO; I CR375 EL4fl II flJIJOtthhE *7
#define CR375 INT WIRE INTO 1* P3.2, ICH375flNT#IPj1W*i?ftJ+ *1
UINT8X DISK BUFFER[5 12*32] at Ox0000; 1*9RAM11hiIE*1
UINT32 DiskStart; 7*! tMLBA *1
U1NT8 SecPerClus; 7*
UII?1T8RsvdSecCnt; 1*Ic
U1NT 16FATSz16; /* FAT 16i JFAT Jffi I%*7
7*
!#USBfl*7 **********
void niDelaymS( UINT8 delay) {
U]ENT8i,j,c;
for ( i = delay, i != 0; i --)
{ for(j=200;j != 0;j--)c+= 3;
for(j=200;j!=0;j--)c+=3;
void CH375 WRCMDPORT(UINT8 cmd) {1* CH375IJ44flA*4
CH37SCMDPORT=cmd;
for(cmd =2; cmd =0; cmd )7*W*4i-flt2uS */
void CH375 WRDATPORT( UINT8 dat) {1* IiJ CR375 flJ3ttM* FT A
CH375 DAT PORT=dat; 7* MCS51 tJLQWffi thflKt
UINT8 CR375 RD DAT PORT( void) {/*bkCR375flthflfl
return(CH375DATPORT);7* MCS51 IL JZflHt*/ UINT8 mWaitlnterrupt( void) { 7*CR375#k
while( CR375 TNT WIRE); 7**/
CR375 WR CMD PORT(CMD GET STATUS); 7*11JW*1 return( CH375 RD DAT PORT(j);
BullcOn1y4flitJ43L,41CR375T,t*1L*M*7
7*
**********
RBC/SCSIfl,.flCR375 J I
7*
**********
/
UINT8 nilnitDisk( void) {7* 4D4r1tfl*7
UINT8 Status;
CR375_WR_CMD_PORT( CMD_GET_STATUS); 7* JZtI$,*7 Status = CR3 75 RD DAT PORTO;
if ( Status = USB INT DISCONNECT ) retum( Status); /* USB1J19T*7
CR375 WRCMDPORT( CMD DISK INIT); 1* ft{IUSBM*7
Status = mWaitlnterruptQ; 7*rj *7
if ( Status != USB TNT SUCCESS) retum( Status); 7**1
CR375 WRCMDPORT( CMD DISK SIZE); 7*USB‘fljfl*7
Status = mWaitlnterruptQ; 7*fliJ*7
if( Status != USB TNT SUCCESS) {1* tI?*7
7* tTCR375fl,*J?Mt—CMDDISKRSENSE*4*7
rnDelaymS( 250);
CR375 WRCMDPORT( CMD DISK SIZE); 7*NZUSB#MJWt*7
Status = mWaitlnterruptQ; 7*rfi *7
if ( Status != USB TNT SUCCESS ) retum( Status); 7*t±iEQ4’i*7
return( 0); 1* UDM1*1
UINT8 mReadSector( UINT32 iLbaStart, UINT8 iSectorCount, UINT8X *oDataBuffer)
U1NT 16mBlockCount;
U1NT8 c;
CH375WRCMDPORT( CMD DISK READ); 7*AUSBiflfl
CH375WRDATPORT( (UINT8)iLbaStart); 1* LBA{8ttcL*7
CH375WRDATPORT( (UINT8)( iLbaStart >> 8));
CH375WRDATPORT( (UINT8)( iLbaStart>> 16));
CH375WRDATPORT((UINT8)( iLbaStart >> 24));/* LBAflJ18tL *7
CH375WRDATPORT( iSectorCount); i
8; mBlockCount != 0; mBlockCount --) {
for (mBlockCount = iSectorCount
*
c = mWaitlnterruptQ; 1*
if(c =USB TNT DISK READ) {7* flflj*7
CH375WRCMDPORT( CMDRDUSBDATA); 1*),kCH375flktV**1
c = CH375RDDATPORTQ;7*tES*1
while (c --) *oDataBufferf_f = CH375RDDATPORT();
CH375WRCMDPORT( CMD DISK RD 00);1*ffUSB4Jfl4?1E*7 else break; /* J14W1k
if ( mBlockCount = 0) {
c=mWaitlnterrupt();1*
if( c== USB TNT SUCCESS ) retum( 0); 1*1’MZJ*1
return( c); 7* 4’J*7
7*
**********
A*1? *7
UINT16 mGetPointWord(UTNT8X *iAddr) { 1*MCS51ticM445Et*7 retum( iAddr[0] I(UINT16)iAddr[1] <<8);
UINT8 mldenflisk( void) {7* *1
UINT8 Status;
DiskStart =0; /
Status = niReadSector( 0, 1, DISK_BUFFER); /* I1ft/
if( Status != 0) retum( Status);
if( DISK BUFFER[O] != OxEB && DISK BUFFER[O] != OxE9) {1*
DiskStart = DISK BUFFER[OxlC6] (UINT16)DISKBUFFER[OxlC7] <<8 (UINT32)DISKBUFFER[OxlC8] <<16 I(UTNT32)DISK BUFFER[OxlC9] <<24;
Status = mReadSector( DiskStart, 1, DISK_BUFFER);
if ( Status != 0 ) return( Status);
SecPerClus = DISK BUFFER[OxOD]; 1**1
RsvdSecCnt = DISK BUFFER[OxOE]; 1**1
FATSz16 = mGetPointWord( &DISKBUFFER[0x161);1* FATIJU IZ*1 return( 0); /*Mtb
UINT16 mLinkCluster( U1NT16 iCluster) {1* *1
!iA: iCluster J:Jtfl n*o *1
UINT8 Status;
Status = mReadSector( DiskStart + RsvdSecCnt + iCluster I 256, 1,
DISK_BUFFER);
if( Status != 0) return( 0); /**/
return( mGetPointWord( &DISK BUFFER[ ( iCluster + iCluster) & OxO1FF]));
UINT32 mClusterToLba( U1NT16 iCluster) {1*I#$t4LBAIJthE
retum( DiskStart + RsvdSecCnt + FATSz16
* 2 + 32 + (iCluster - 2)
*
SecPerClus);
void mInitSTDIO( void) {1* flPCt,-bflt5E
SCON = 0x50; PCON = 0x80; TMOD = 0x20; TH1 = Oxf3; TR1=1; TI=1; !24MHz, 9600bps */
void mStoplfError( UINT8 iErrCode) {/*U* IU#I49tk*1
if ( iErrCode = 0) return;
printf( “Error status, %02X\n”,(UINT16)iErrCode);
mainQ{
UINT8 Status;
UINT8X
UINT16Cluster;
mDelaymS( 200); /* flt200tLt*7
mInitSTDIOQ;
CH375_WR_CMD_PORT( CMD_SET_USB_MODE); /*CH375,tWUSBI1?Pttt*7 CH375WRDATPORT( 6); 7*WJt4t4j, USBfl3
while (1) {
printf( “Insert USB disk\n”);
while (mWaitlnterrupt() != USB_INT_CONNECT); 7*I
mDelaymS( 250); /*UAIIfj
Status = mlnitDisk(); /*ftUiJUffifhH
mStoplfError( Status);
Status = midenDiskO; 7*R’J3*7
mStoplfError( Status);
2, 32,
Status = mReadSector( DiskStart + RsvdSecCnt + FATSz16
*
DISK_BUFFER);
mStoplfError( Status); /* i*FAT 16fl flJ*II,3fl?*r!ij1J 32t, I
/
for ( CurrentDir = DISK_BUFFER; CurrentDir[0] != 0; CurrentDir += 32) { if
( (CurrentDir[OxOBl & 0x08 ) == 0 && CurrentDir[0] !OxE5)
{ CurrentDir[OxOBj =0; 7*T±,t1tfl<43 AM*t
printf( “Name:%s\n”,CurrentDir); 7*1L1f
* fl1LBW
}
7*±St flfl,ttff,flflCtfffl*7 if( (DISK BUFFER[OxOB]&0x08)==0 && DISK BUFFER[0]!=OxE5 && DISK BUFFER[8] ==…C?){
Cluster = mGetPointWord( &DISK BUFFER[Ox1A]); /*ff *7
while (Cluster if( Cluster == 0) mStoplfError( Ox8F); /* / Status = mReadSector( mClusterToLba( Cluster ), SecPerClus, DISK_BUFFER); mStoplfError( Status); 7*J1??jI:*7 DISK_BUFFER[30] =0; printf( …Data:%s\n”,DISK BUFFER); /* Cluster = mLinkCluster( Cluster); 7**7 } while (mWaitlnterrupt() != USB_INT_DISCONNECT); 7*1U1LB*7 mDelaymS( 250);