?? mmc.c
字號(hào):
rSDIDCON=(1<<19)|(1<<17)|(Wide<<16)|(2<<12)|(1<<0);
// Rx after cmd, blk, 4bit bus, Rx start, blk num, 4 block
rSDICARG=addr<<9; // CMD17/18(addr)
//rSDICARG=0;
RERDCMD:
rSDICCON=(0x1<<9)|(0x1<<8)|0x51; // sht_resp, wait_resp, dat, start, CMD17
if(!Chk_CMDend(17, 1)) //-- Check end of CMD17
goto RERDCMD;
//rSDICSTA=0xa00; // Clear cmd_end(with rsp)
while(rd_cnt<128) // 512*block bytes
{
if((rSDIDSTA&0x20)==0x20) // Check timeout
{
rSDIDSTA=0x1<<0x5; // Clear timeout flag
break;
}
status=rSDIFSTA;
if((status&0x1000)==0x1000) // Is Rx data?
{
// *Rx_buffer++=rSDIDAT;
Rx_buffer[rd_cnt] =rSDIDAT;
rd_cnt++;
}
}
#ifdef SD_INFO
Uart_Printf("rd_cnt is %d\n", rd_cnt);
#endif
//-- Check end of DATA
if(!Chk_DATend())
Uart_Printf("dat error\n");
rSDIDSTA=0x10; // Clear data Tx/Rx end
// 這里可以用另外的方式實(shí)現(xiàn)
for(i=0; i<512; i+=4)
{
Buffer[i] = (U8) (Rx_buffer[i/4]>>24);
Buffer[i+1]=(U8) (Rx_buffer[i/4]>>16);
Buffer[i+2]=(U8) (Rx_buffer[i/4]>>8);
Buffer[i+3]=(U8) Rx_buffer[i/4];
}
return TRUE;
}
S8 Mmc_Write_Sector(U32 addr,U8 *Buffer)
{
int status;
wt_cnt=0;
rSDICON |= rSDICON|(1<<1); // FIFO reset
rSDIDCON=(1<<20)|(1<<17)|(Wide<<16)|(3<<12)|(4<<0);
// Tx after rsp, blk, 4bit bus, Tx start, blk num, 4 block
//rSDICARG=addr<<9; // CMD24/25(addr)
rSDICARG=0;
REWTCMD:
rSDICCON=(0x1<<9)|(0x1<<8)|0x59; //sht_resp, wait_resp, dat, start, CMD25
if(!Chk_CMDend(25, 1)) //-- Check end of CMD25
goto REWTCMD;
//rSDICSTA=0xa00; // Clear cmd_end(with rsp)
while(wt_cnt<512)
{
status=rSDIFSTA;
if((status&0x2000)==0x2000)
{
rSDIDAT=*Buffer++;
wt_cnt++;
}
}
//-- Check end of DATA
if(!Chk_DATend())
Uart_Printf("dat error\n");
rSDIDSTA=0x10; // Clear data Tx/Rx end
//--Stop cmd(CMD12)
REWCMD12:
rSDIDCON=(1<<18)|(1<<17)|(0<<16)|(1<<12)|(4<<0);
rSDICARG=0x0; //CMD12(stuff bit)
rSDICCON=(0x1<<9)|(0x1<<8)|0x4c; //sht_resp, wait_resp, start, CMD12
//-- Check end of CMD12
if(!Chk_CMDend(12, 1))
goto REWCMD12;
//rSDICSTA=0xa00; // Clear cmd_end(with rsp)
//-- Check end of DATA(with busy state)
if(!Chk_BUSYend())
Uart_Printf("error\n");
rSDIDSTA=0x08;
return TRUE;
}
int Chk_BUSYend(void)
{
int finish;
finish=rSDIDSTA;
while( !( ((finish&0x08)==0x08) | ((finish&0x20)==0x20) ))
finish=rSDIDSTA;
if( (finish&0xfc) != 0x08 )
{
Uart_Printf("DATA:finish=0x%x\n", finish);
rSDIDSTA=0xf4; //clear error state
return 0;
}
return 1;
}
int Chk_DATend(void)
{
int finish;
finish=rSDIDSTA;
while( !( ((finish&0x10)==0x10) | ((finish&0x20)==0x20) ))
// Chek timeout or data end
finish=rSDIDSTA;
if( (finish&0xfc) != 0x10 )
{
Uart_Printf("DATA:finish=0x%x\n", finish);
rSDIDSTA=0xec; // Clear error state
return 0;
}
return 1;
}
void Set_1bit_bus(void)
{
Wide=0;
if(!MMC)
SetBus();
#ifdef SD_INFO
Uart_Printf("\n****1bit bus****\n");
#endif
}
void Set_4bit_bus(void)
{
Wide=1;
SetBus();
#ifdef SD_INFO
Uart_Printf("\n****4bit bus****\n");
#endif
}
int Chk_MMC_OCR(void)
{
int i;
//-- Negotiate operating condition for MMC, it makes card ready state
for(i=0;i<15;i++)
{
rSDICARG=0xffc000; //CMD1(OCR:2.6V~3.6V)
// rSDICARG=0xff8000; //CMD1(OCR:2.7V~3.6V)
rSDICCON=(0x1<<9)|(0x1<<8)|0x41; //sht_resp, wait_resp, start, CMD1
//-- Check end of CMD1
if(Chk_CMDend(1, 1) & rSDIRSP0==0x80ffc000)
// if(Chk_CMDend(1, 1) & rSDIRSP0==0x80ff8000)
{
//rSDICSTA=0xa00; // Clear cmd_end(with rsp)
return 1; // Success
}
}
//rSDICSTA=0xa00; // Clear cmd_end(with rsp)
return 0; // Fail
}
int Chk_SD_OCR(void)
{
int i;
//-- Negotiate operating condition for SD, it makes card ready state
for(i=0;i<15;i++)
{
CMD55(); // Make ACMD
rSDICARG=0xff8000; //ACMD41(OCR:2.7V~3.6V)
rSDICCON=(0x1<<9)|(0x1<<8)|0x69;//sht_resp, wait_resp, start, ACMD41
//-- Check end of ACMD41
if( Chk_CMDend(41, 1) & rSDIRSP0==0x80ff8000 )
{
//rSDICSTA=0xa00; // Clear cmd_end(with rsp)
return 1; // Success
}
Delay(200); // Wait Card power up status
}
//Uart_Printf("SDIRSP0=0x%x\n",rSDIRSP0);
//rSDICSTA=0xa00; // Clear cmd_end(with rsp)
return 0; // Fail
}
int CMD55(void)
{
//--Make ACMD
rSDICARG=RCA<<16; //CMD7(RCA,stuff bit)
rSDICCON=(0x1<<9)|(0x1<<8)|0x77; //sht_resp, wait_resp, start, CMD55
//-- Check end of CMD55
if(!Chk_CMDend(55, 1))
return 0;
//rSDICSTA=0xa00; // Clear cmd_end(with rsp)
return 1;
}
int CMD13(void)//SEND_STATUS
{
int response0;
rSDICARG=RCA<<16; // CMD13(RCA,stuff bit)
rSDICCON=(0x1<<9)|(0x1<<8)|0x4d; // sht_resp, wait_resp, start, CMD13
//-- Check end of CMD13
if(!Chk_CMDend(13, 1))
return 0;
//Uart_Printf("rSDIRSP0=0x%x\n", rSDIRSP0);
if(rSDIRSP0&0x100)
Uart_Printf("Ready for Data\n");
else
Uart_Printf("Not Ready\n");
response0=rSDIRSP0;
response0 &= 0x3c00;
response0 = response0 >> 9;
Uart_Printf("Current Status=%d\n", response0);
// removed by ldqmoon
// if(response0==6)
//Test_SDI();
//rSDICSTA=0xa00; // Clear cmd_end(with rsp)
return 1;
}
void CMD0(void)
{
//-- Make card idle state
rSDICARG=0x0; // CMD0(stuff bit)
rSDICCON=(1<<8)|0x40; // No_resp, start, CMD0
//-- Check end of CMD0
Chk_CMDend(0, 0);
//rSDICSTA=0x800; // Clear cmd_end(no rsp)
}
int CMD9(void)//SEND_CSD
{
rSDICARG=RCA<<16; // CMD9(RCA,stuff bit)
rSDICCON=(0x1<<10)|(0x1<<9)|(0x1<<8)|0x49; // long_resp, wait_resp, start, CMD9
Uart_Printf("\n****CSD register****\n");
//-- Check end of CMD9
if(!Chk_CMDend(9, 1))
return 0;
Uart_Printf(" SDIRSP0=0x%x\n SDIRSP1=0x%x\n SDIRSP2=0x%x\n SDIRSP3=0x%x\n", rSDIRSP0,rSDIRSP1,rSDIRSP2,rSDIRSP3);
return 1;
}
int Chk_CMDend(int cmd, int be_resp)
//0: Timeout
{
int finish0;
if(!be_resp) // No response
{
finish0=rSDICSTA;
while((finish0&0x800)!=0x800) // Check cmd end
finish0=rSDICSTA;
rSDICSTA=finish0;// Clear cmd end state
return 1;
}
else // With response
{
finish0=rSDICSTA;
while( !( ((finish0&0x200)==0x200) | ((finish0&0x400)==0x400) )) // Check cmd/rsp end
finish0=rSDICSTA;
if(cmd==1 | cmd==9 | cmd==41) // CRC no check
{
if( (finish0&0xf00) != 0xa00 ) // Check error
{
rSDICSTA=finish0; // Clear error state
if(((finish0&0x400)==0x400))
return 0; // Timeout error
}
rSDICSTA=finish0; // Clear cmd & rsp end state
}
else // CRC check
{
if( (finish0&0x1f00) != 0xa00 ) // Check error
{
//Uart_Printf("CMD%d:rSDICSTA=0x%x, rSDIRSP0=0x%x\n",cmd, rSDICSTA, rSDIRSP0);
rSDICSTA=finish0; // Clear error state
if(((finish0&0x400)==0x400))
return 0; // Timeout error
}
rSDICSTA=finish0;
}
return 1;
}
}
void Card_sel_desel(char sel_desel)
{
//-- Card select or deselect
if(sel_desel)
{
RECMDS7:
rSDICARG=RCA<<16; // CMD7(RCA,stuff bit)
rSDICCON= (0x1<<9)|(0x1<<8)|0x47; // sht_resp, wait_resp, start, CMD7
//-- Check end of CMD7
if(!Chk_CMDend(7, 1))
goto RECMDS7;
//rSDICSTA=0xa00; // Clear cmd_end(with rsp)
//--State(transfer) check
if( rSDIRSP0 & 0x1e00!=0x800 )
goto RECMDS7;
}
else
{
RECMDD7:
rSDICARG=0<<16; //CMD7(RCA,stuff bit)
rSDICCON=(0x1<<8)|0x47; //no_resp, start, CMD7
//-- Check end of CMD7
if(!Chk_CMDend(7, 0))
goto RECMDD7;
//rSDICSTA=0x800; // Clear cmd_end(no rsp)
}
}
void SetBus(void)
{
SET_BUS:
CMD55(); // Make ACMD
//-- CMD6 implement
rSDICARG=Wide<<1; //Wide 0: 1bit, 1: 4bit
rSDICCON=(0x1<<9)|(0x1<<8)|0x46; //sht_resp, wait_resp, start, CMD55
if(!Chk_CMDend(6, 1)) // ACMD6
goto SET_BUS;
//rSDICSTA=0xa00; // Clear cmd_end(with rsp)
}
void Set_Prt(void)
{
//-- Set protection addr.0 ~ 262144(32*16*512)
Uart_Printf("[Set protection(addr.0 ~ 262144) test]\n");
RECMD28:
//--Make ACMD
rSDICARG=0; // CMD28(addr)
rSDICCON=(0x1<<9)|(0x1<<8)|0x5c; //sht_resp, wait_resp, start, CMD28
//-- Check end of CMD28
if(!Chk_CMDend(28, 1))
goto RECMD28;
//rSDICSTA=0xa00; // Clear cmd_end(with rsp)
}
void Clr_Prt(void)
{
//-- Clear protection addr.0 ~ 262144(32*16*512)
Uart_Printf("[Clear protection(addr.0 ~ 262144) test]\n");
RECMD29:
//--Make ACMD
rSDICARG=0; // CMD29(addr)
rSDICCON=(0x1<<9)|(0x1<<8)|0x5d; //sht_resp, wait_resp, start, CMD29
//-- Check end of CMD29
if(!Chk_CMDend(29, 1))
goto RECMD29;
//rSDICSTA=0xa00; // Clear cmd_end(with rsp)
}?? 快捷鍵說(shuō)明
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