int wait_initV2()
{
int i=20000;
int r;
spi_spin();
while(--i)
{
if((r=cmd_CMD55())==1)
{
// printf("CMD55 %d\n",r);
SPI(0xff);
if((r=cmd_CMD41())==0)
{
// printf("CMD41 %d\n",r);
SPI(0xff);
return(1);
}
// else
// printf("CMD41 %d\n",r);
spi_spin();
}
// else
// printf("CMD55 %d\n",r);
}
return(0);
}
int is_sdhc()
{
int i,r;
spi_spin();
r=cmd_CMD8(); // test for SDHC capability
// printf("cmd_CMD8 response: %d\n",r);
if(r!=1)
{
wait_init();
return(0);
}
r=SPI_PUMP();
if((r&0xffff)!=0x01aa)
{
// printf("CMD8_4 response: %d\n",r);
wait_init();
return(0);
}
SPI(0xff);
// If we get this far we have a V2 card, which may or may not be SDHC...
i=50;
while(--i)
{
if(wait_initV2())
{
if((r=cmd_CMD58())==0)
{
// printf("CMD58 %d\n ",r);
SPI(0xff);
r=SPI_READ();
// printf("CMD58_2 %d\n ",r);
SPI(0xff);
SPI(0xff);
SPI(0xff);
SPI(0xff);
if(r&0x40)
return(1);
else
return(0);
}
// else
// printf("CMD58 %d\n ",r);
}
if(i==2)
{
puts("SDHC error!\n");
return(0);
}
}
return(0);
}
int spi_init()
{
int j;
int i;
int r;
SDHCtype=1;
j=5;
while(--j)
{
SPI_CS(0); // Disable CS
spi_spin();
puts("SD init...\n");
// puts("SPI Init()\n");
DBG("Activating CS\n");
SPI_CS(1);
i=50;
while(--i)
{
if(cmd_reset()==1) // Enable SPI mode
{
i=1;
j=1;
}
DBG("Sent reset command\n");
if(i==2)
{
puts("SD card reset failed!\n");
return(0);
}
}
}
DBG("Card responded to reset\n");
SDHCtype=is_sdhc();
if(SDHCtype)
DBG("SDHC card detected\n");
else // Not SDHC? Set blocksize to 512.
{
DBG("Sending cmd16\n");
cmd_CMD16(1);
}
SPI(0xFF);
SPI_CS(0);
SPI(0xFF);
DBG("Init done\n");
return(1);
}
int wait_init()
{
int i=20;
int r;
SPI(0xff);
// puts("Cmd_init\n");
while(--i)
{
if((r=cmd_init())==0)
{
// printf("init %d\n ",r);
SPI(0xff);
return(1);
}
// else
// printf("init %d\n ",r);
spi_spin();
}
return(0);
}
int spi_init()
{
int i;
int r;
SDHCtype=1;
SPI_CS(0); // Disable CS
spi_spin();
puts("SPI Init()\n");
DBG("Activating CS\n");
SPI_CS(1);
i=8;
while(--i)
{
if(cmd_reset()==1) // Enable SPI mode
i=1;
DBG("Sent reset command\n");
if(i==2)
{
DBG("SD card initialization error!\n");
return(0);
}
}
DBG("Card responded to reset\n");
SDHCtype=is_sdhc();
if(SDHCtype)
DBG("SDHC card detected\n");
else // If not SDHC, Set blocksize to 512 bytes
{
DBG("Sending cmd16 (blocksize)\n");
cmd_CMD16(1);
}
SPI(0xFF);
SPI_CS(0);
SPI(0xFF);
DBG("Init done\n");
return(1);
}
int spi_init()
{
int i;
int r;
SDHCtype=1;
// HW_PER(PER_TIMER_DIV7)=150; // About 350KHz
SPI_CS(0); // Disable CS
spi_spin();
// puts("Activating CS\n");
SPI_CS(1);
i=8;
while(--i)
{
if(cmd_reset()==1) // Enable SPI mode
i=1;
puts("Sent reset command\n");
if(i==2)
{
puts("SD card initialization error!\n");
return(0);
}
}
puts("Card responded to reset\n");
SDHCtype=is_sdhc();
if(SDHCtype)
puts("SDHC card detected\n");
puts("Sending cmd16\n");
cmd_CMD16(1);
SPI(0xFF);
SPI_CS(0);
SPI(0xFF);
puts("Init done\n");
// HW_PER(PER_TIMER_DIV7)=HW_PER(PER_CAP_SPISPEED);
return(1);
}
int is_sdhc()
{
int i,r;
spi_spin();
r=cmd_CMD8(); // test for SDHC capability
// printf("cmd_CMD8 response: %d\n",r);
if(r!=1)
{
wait_init();
return(0);
}
#if 0
SPI(0xff);
// SPI_WAIT();
r=SPI_READ();
// printf("CMD8_1 response: %d\n",r);
SPI(0xff);
// SPI_WAIT();
r=SPI_READ();
// printf("CMD8_2 response: %d\n",r);
SPI(0xff);
// SPI_WAIT();
r=SPI_READ();
if(r!=1)
{
wait_init();
return(0);
}
// printf("CMD8_3 response: %d\n",r);
SPI(0xff);
// SPI_WAIT();
r=SPI_READ();
if(r!=0xaa)
{
wait_init();
return(0);
}
#endif
r=SPI_PUMP();
if((r&0xffff)!=0x01aa)
{
wait_init();
return(0);
}
// printf("CMD8_4 response: %d\n",r);
SPI(0xff);
// If we get this far we have a V2 card, which may or may not be SDHC...
i=50;
while(--i)
{
if(wait_initV2())
{
if((r=cmd_CMD58())==0)
{
printf("CMD58 %d\n ",r);
SPI(0xff);
// SPI_WAIT();
r=SPI_READ();
printf("CMD58_2 %d\n ",r);
SPI_PUMP();
// SPI(0xff);
// SPI(0xff);
// SPI(0xff);
// SPI(0xff);
if(r&0x40)
return(1);
else
return(0);
}
else
printf("CMD58 %d\n ",r);
}
if(i==2)
{
printf("SDHC Initialization error!\n");
return(0);
}
}
puts("Determined SDHC status\n");
return(0);
}
