56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
/*#######################################################################################
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Connect ARM to MMC/SD
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Copyright (C) 2004 Ulrich Radig
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#######################################################################################*/
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#ifndef _MMC_H_
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#define _MMC_H_
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#include <avr/io.h>
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//#define SPI_Mode 1 //1 = Hardware SPI | 0 = Software SPI
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#define SPI_Mode 0
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#define MMC_Write PORTC //Port an der die MMC/SD-Karte angeschlossen ist also des SPI
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#define MMC_Read PINC
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#define MMC_Direction_REG DDRC
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#define MMC_CS PC7
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#define MMC_DO PC5
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#define MMC_DI PC6
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#define MMC_CLK PC3
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#define SPI_SS PC4 //Nicht Benutz muß aber definiert werden
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//Prototypes
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extern unsigned char mmc_read_byte(void);
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extern void mmc_write_byte(unsigned char);
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extern void mmc_read_block(unsigned char *,unsigned char *,unsigned in);
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extern unsigned char mmc_init(void);
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extern unsigned char mmc_read_sector (unsigned long,unsigned char *);
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extern unsigned char mmc_write_sector (unsigned long,unsigned char *);
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extern unsigned char mmc_write_command (unsigned char *);
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extern unsigned char mmc_read_csd (unsigned char *);
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extern unsigned char mmc_read_cid (unsigned char *);
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//set MMC_Chip_Select to high (MMC/SD-Karte Inaktiv)
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#define MMC_Disable() MMC_Write|= (1<<MMC_CS);
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//set MMC_Chip_Select to low (MMC/SD-Karte Aktiv)
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#define MMC_Enable() MMC_Write&=~(1<<MMC_CS);
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#define nop() __asm__ __volatile__ ("nop" ::)
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#endif //_MMC_H_
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