45 lines
1.7 KiB
C
Executable File
45 lines
1.7 KiB
C
Executable File
/*#######################################################################################
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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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#define MMC_Write PORTB //Port an der die MMC/SD-Karte angeschlossen ist also des SPI
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#define MMC_Read PINB
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#define MMC_Direction_REG DDRB
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#if defined (__AVR_ATmega644__)
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#define SPI_DI 6 //Port Pin an dem Data Output der MMC/SD-Karte angeschlossen ist
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#define SPI_DO 5 //Port Pin an dem Data Input der MMC/SD-Karte angeschlossen ist
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#define SPI_Clock 7 //Port Pin an dem die Clock der MMC/SD-Karte angeschlossen ist (clk)
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#define MMC_Chip_Select 4 //Port Pin an dem Chip Select der MMC/SD-Karte angeschlossen ist
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//#define SPI_SS 4 //Nicht Benutz mu<6D> aber definiert werden
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#endif
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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_Chip_Select);
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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_Chip_Select);
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#define nop() __asm__ __volatile__ ("nop" ::)
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#endif
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