hal.h

本程序是基于单片机C8051F020上使用SL811 USB 总线接口实现检测U 盘的功能。插上U 盘

#define SL811_ADDR_PORT		0x3f00
#define SL811_DATA_PORT		0x3f01

unsigned char SL811Read(unsigned char a);
void SL811Write(unsigned char a, unsigned char d);
void SL811BufRead(unsigned char addr, unsigned char *s, unsigned char c);
void SL811BufWrite(unsigned char addr, unsigned char *s, unsigned char c);
unsigned char RamRead(unsigned short a);
void RamWrite(unsigned short a, unsigned char d);
unsigned short WordSwap(unsigned short input);
void DelayMs(unsigned char nFactor);
void DelayUs(unsigned char nFactor);
unsigned long SwapINT32(unsigned long dData);
unsigned int SwapINT16(unsigned int dData);