开源的国外AT91SAM7S64开发板
源代码在线查看： mmc.h
/*
mmc.h: Dekcarations for Communikation with the MMC (see mmc.c) in unprotected spi mode.
Pin configuration at MSP430F149:
--------------------------------
MC MC Pin MMC MMC Pin
P5.4 48 ChipSelect 1
P5.1 / SlaveInMasterOut 45 DataIn 2
. GND 3 (0 V)
. VDD 4 (3.3 V)
P5.3 UCLK1 / SlaveCLocK 47 Clock 5
. GND 6 (0 V)
P5.2 / SlaveOutMasterIn 46 DataOut 7
---------------------------------------------------------------------
Revisions
Date Author Revision
11. May 2003 Rolf Freitag 0.02
(2004: corrected MC pin numbers (switched only 45, 46))
*/
#ifndef _MMCLIB_H
#define _MMCLIB_H
#ifndef TXEPT // transmitter-empty flag
#define TEXPT 0x01
#endif
// macro defines
#define HIGH(a) ((a>>8)&0xFF) // high byte from word
#define LOW(a) (a&0xFF) // low byte from word
//#define CS_LOW() GPPOA &= ~0x00000080
//#define CS_HIGH() GPPOA |= 0x00000080
#define SPI_RXC (IFG2 & URXIFG1)
#define SPI_TXC (IFG2 & UTXIFG1)
#define SPI_RX_COMPLETE (IFG2 & URXIFG1)
#define SPI_TX_READY (IFG2 & UTXIFG1)
#define DUMMY 0xff
// Tokens (nessisary because at nop/idle (and CS active) only 0xff is on the data/command line)
#define MMC_START_DATA_BLOCK_TOKEN 0xfe // Data token start byte, Start Single Block Read
#define MMC_START_DATA_MULTIPLE_BLOCK_READ 0xfe // Data token start byte, Start Multiple Block Read
#define MMC_START_DATA_BLOCK_WRITE 0xfe // Data token start byte, Start Single Block Write
#define MMC_START_DATA_MULTIPLE_BLOCK_WRITE 0xfc // Data token start byte, Start Multiple Block Write
#define MMC_STOP_DATA_MULTIPLE_BLOCK_WRITE 0xfd // Data toke stop byte, Stop Multiple Block Write
// an affirmative R1 response (no errors)
#define MMC_R1_RESPONSE 0x00
// this variable will be used to track the current block length
// this allows the block length to be set only when needed
// unsigned long _BlockLength = 0;
// error/success codes
#define MMC_SUCCESS 0x00
#define MMC_BLOCK_SET_ERROR 0x01
#define MMC_RESPONSE_ERROR 0x02
#define MMC_DATA_TOKEN_ERROR 0x03
#define MMC_INIT_ERROR 0x04
#define MMC_CRC_ERROR 0x10
#define MMC_WRITE_ERROR 0x11
#define MMC_OTHER_ERROR 0x12
#define MMC_TIMEOUT_ERROR 0xFF
// commands: first bit 0 (start bit), second 1 (transmission bit); CMD-number + 0ffsett 0x40
#define MMC_GO_IDLE_STATE 0x40 //CMD0
#define MMC_SEND_OP_COND 0x41 //CMD1
#define MMC_READ_CSD 0x49 //CMD9
#define MMC_SEND_CID 0x4a //CMD10
#define MMC_STOP_TRANSMISSION 0x4c //CMD12
#define MMC_SEND_STATUS 0x4d //CMD13
#define MMC_SET_BLOCKLEN 0x50 //CMD16 Set block length for next read/write
#define MMC_READ_SINGLE_BLOCK 0x51 //CMD17 Read block from memory
#define MMC_READ_MULTIPLE_BLOCK 0x52 //CMD18
#define MMC_CMD_WRITEBLOCK 0x54 //CMD20 Write block to memory
#define MMC_WRITE BLOCK 0x58 //CMD25
#define MMC_WRITE_MULTIPLE_BLOCK 0x59 //CMD??
#define MMC_WRITE_CSD 0x5b //CMD27 PROGRAM_CSD
#define MMC_SET_WRITE_PROT 0x5c //CMD28
#define MMC_CLR_WRITE_PROT 0x5d //CMD29
#define MMC_SEND_WRITE_PROT 0x5e //CMD30
#define MMC_TAG_SECTOR_START 0x60 //CMD32
#define MMC_TAG_SECTOR_END 0x61 //CMD33
#define MMC_UNTAG_SECTOR 0x62 //CMD34
#define MMC_TAG_EREASE_GROUP_START 0x63 //CMD35
#define MMC_TAG_EREASE_GROUP_END 0x64 //CMD36
#define MMC_UNTAG_EREASE_GROUP 0x65 //CMD37
#define MMC_EREASE 0x66 //CMD38
#define MMC_READ_OCR 0x67 //CMD39
#define MMC_CRC_ON_OFF 0x68 //CMD40
#define BIT0 0x00000001
#define BIT1 0x00000002
#define BIT2 0x00000004
#define BIT3 0x00000008
#define BIT4 0x00000010
#define BIT5 0x00000020
#define BIT6 0x00000040
#define BIT7 0x00000080
#define BIT8 0x00000100
#define BIT9 0x00000200
#define BIT10 0x00000400
#define BIT11 0x00000800
#define BIT12 0x00001000
#define BIT13 0x00002000
#define BIT14 0x00004000
#define BIT15 0x00008000
#define BIT16 0x00010000
#define BIT17 0x00020000
#define BIT18 0x00040000
#define BIT19 0x00080000
#define BIT20 0x00100000
#define BIT21 0x00200000
#define BIT22 0x00400000
#define BIT23 0x00800000
#define BIT24 0x01000000
#define BIT25 0x02000000
#define BIT26 0x04000000
#define BIT27 0x08000000
#define BIT28 0x10000000
#define BIT29 0x20000000
#define BIT30 0x40000000
#define BIT31 0x80000000
//TI added sub function for top two spi_xxx
//my
unsigned char spiReadByte();
void spiWriteByte(const unsigned char data);
void initSPI(void);
// Card present, Write protect
void Init_CP_WP (void);
// mmc init
char initMMC (void);
// send command to MMC
void mmcSendCmd (const char cmd, unsigned long data, const char crc);
// set MMC block length of count=2^n Byte
char mmcSetBlockLength (const unsigned long);
// read a size Byte big block beginning at the address.
char mmcReadBlock(const unsigned long address, const unsigned long count);
// write a 512 Byte big block beginning at the (aligned) adress
char mmcWriteBlock (const unsigned long address);
// Register arg1 der Laenge arg2 auslesen (into the buffer)
char mmcReadRegister(const char, const unsigned char);
//transmit character via SPI
unsigned char spiSendByte(const unsigned char data);
#endif /* _MMCLIB_H */
