mmc._h

来自「采用Mega16＋VS1011B＋SD卡制作的Mp3」· _H 代码 · 共 29 行

#ifndef __MMC_SD_h__
#define __MMC_SD_h__

#define uint8  unsigned char
#define  int8    signed char
#define uint16 unsigned int
#define  int16   signed int
#define uint32 unsigned long
#define  int32   signed long

#define MMC_SD_PORT       PORTB  //引脚定义
#define MMC_SD_CS_PIN     4      //mega16,MMC/SD卡的片选引脚,接PortB4/ss
#define MMC_SD_INSDETC	  0		 //MMC/SD卡的插入检测引脚,接PortA0
#define DDR_INI() DDRB |= BIT(4)|BIT(5)|BIT(7)  //mega16，这些SPI端口要输出
#define SPI_CS_Assert()   MMC_SD_PORT &= ~BIT(MMC_SD_CS_PIN)  //SS为低,选中MMC
#define SPI_CS_Deassert() MMC_SD_PORT |=  BIT(MMC_SD_CS_PIN)  //SS为高,释放MMC

extern uint8 MMC_SD_Detect(void);
extern void MMC_SD_Init(void);
extern uint8 MMC_SD_Reset(void);
extern uint8 MMC_SD_ReadSingleBlock(uint32 sector, uint8* buffer);
extern uint8 MMC_SD_WriteSingleBlock(uint32 sector, uint8* buffer);
extern uint32 MMC_SD_ReadCapacity(void);
extern void SPI_High(void);


#endif