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started sd_card.c transcribe to C

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This commit is contained in:
Markus Fröschle
2012-11-18 09:20:50 +00:00
parent 9aa82d6a91
commit 1df70e6aee
1 changed files with 78 additions and 0 deletions
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78
sources/sd_card.c
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@@ -4,6 +4,9 @@
#include <stdint.h> #include <stdint.h>
#include <MCF5475.h> #include <MCF5475.h>
#include "bas_printf.h"
extern void wait(uint32_t value);
void sd_card_idle(void) void sd_card_idle(void)
{ {
@@ -35,3 +38,78 @@ int sd_card_init(void)
return ret; return ret;
} }
uint32_t sd_com(uint32_t command)
{
uint32_t ret;
MCF_DSPI_DTFR = command;
while (! (MCF_DSPI_DSR & MCF_DSPI_DSR_TCF)); /* wait until DSPI transfer complete */
ret = MCF_DSPI_DRFR; /* read DSPI Rx FIFO register */
MCF_DSPI_DSR = 0xffffffff; /* clear DSPI status register */
return ret;
}
void sd_init(void)
{
uint32_t ret;
xprintf("SD-Card initialization: ");
MCF_PAD_PAR_DSPI = 0x1fff;
MCF_PAD_PAR_TIMER = 0xff; /*
* FIXME: really necessary or just an oversight
* that PAD_PAR_DSPI is only 16 bit?
*/
MCF_DSPI_DMCR = MCF_DSPI_DMCR_MSTR | /* 8 bit CS5 on */
MCF_DSPI_DMCR_CSIS3 |
MCF_DSPI_DMCR_CSIS2 |
MCF_DSPI_DMCR_DTXF |
MCF_DSPI_DMCR_DRXF |
MCF_DSPI_DMCR_CTXF |
MCF_DSPI_DMCR_CRXF; /* 0x800d3c00 */
MCF_DSPI_DCTAR0 = MCF_DSPI_DCTAR_TRSZ(0b111) | /* transfer size = 8 bit */
MCF_DSPI_DCTAR_PCSSCK(0b01) | /* 3 clock DSPICS to DSPISCK delay prescaler */
MCF_DSPI_DCTAR_PASC_3CLK | /* 3 clock DSPISCK to DSPICS negation prescaler */
MCF_DSPI_DCTAR_PDT_3CLK | /* 3 clock delay between DSPICS assertions prescaler */
MCF_DSPI_DCTAR_PBR_3CLK | /* 3 clock prescaler */
MCF_DSPI_DCTAR_ASC(0b1001) | /* 1024 */
MCF_DSPI_DCTAR_DT(0b1001) | /* 1024 */
MCF_DSPI_DCTAR_BR(0b0111);
/* 0x38558897 */
MCF_DSPI_DSR = 0xffffffff; /* clear DSPI status register */
wait(1000); /* wait 1ms */
MCF_DSPI_DMCR = 0xc00d3c00;
wait(10000);
MCF_DSPI_DMCR = 0x800d3c00;
ret = sd_com(0x082000ff);
ret = sd_com(0x082000ff);
ret = sd_com(0x082000ff);
ret = sd_com(0x082000ff);
ret = sd_com(0x082000ff);
ret = sd_com(0x082000ff);
ret = sd_com(0x082000ff);
ret = sd_com(0x082000ff);
ret = sd_com(0x082000ff);
ret = sd_com(0x082000ff);
MCF_DSPI_DMCR = 0x802d3c00;
ret = sd_com(0x08200000);
ret = sd_com(0x08200000);
MCF_DSPI_DMCR = 0x800d3c00;
ret = sd_com(0x082000ff);
ret = sd_com(0x082000ff);
wait(10000);
xprintf("finished\r\n");
}