51单片机硬盘控制电路以及源程序

/**********************************************************
读硬盘参数
***********************************************************/
void DriverID(void)
{
unsigned int i=512;
//send_string("Starting read driver ID");
WaitBSY();
//send_string("Now can read driver ID ");
WriteReg(_Status_Command,0xec);
//send_string("Waiting.. ");
do{ReadReg(_Status_Command);}while(BSY|!DRQ);
//send_string("Now Sending ");
while(i){
ReadData();
send_char(Data_bufferH);
send_char(Data_bufferL);
i-=2;
}
}

/*********************************************************
硬盘寻址
**********************************************************/
WriteCHS(byte head,uint cylinder,byte sector,byte read_count)
{
WaitBSY();
WriteReg(_DeviceAndHead,0xa0|head);
WriteReg(_CylinderH,(char)(cylinder>>8));
WriteReg(_CylinderL,(char)(cylinder0x00ff));
WriteReg(_SecNum,sector);
WriteReg(_SecCount,read_count);
}

/**********************************************************
*用途:将硬盘的返回数据读入BUFFER数组
***********************************************************/
void SendData()
{ uint i;
i=512*15;
do{ReadReg(_Status_Command);}while(BSY|!DRQ);
if(ERR){
send_string("\x0d\x0a Error\x0d\x0a");
}
while(i){ReadData();send_char(Data_bufferL);send_char(Data_bufferH);i-=2;}
}

// 激活硬盘(转动)
void SpinUP()
{
WaitBSY();
WriteReg(_Status_Command,0xE1);
}
// 让硬盘休眠(停转)/
void SpinDown()
{
WaitBSY();
WriteReg(_Status_Command,0xE0);
}

void main(void)
{
//Initialize
SCON=0x50; //串口初始化
TMOD=0x20; //波特率为57600bps
TCON=0x40;
PCON=0x80;
TH1=0xFf;
TL1=0xFf;
TR1=1;
send_string("IDE Control Demo. Power By DDDLZHU\x0d\x0a");//send welcome word
Rst=0; //IDE 复位
delay(50);
Rst=1;
delay(255);
send_string("Reset Driver OK...\x0d\x0a");
Init(); //初始化硬盘
send_string("Initialize Driver OK,Now Read ID\x0d\x0a");
send_string("HardDisk ID is ....\x0d\x0a");
DriverID(); //读硬盘id
send_string("Now Read The First Sector On this HardDisk\x0d\x0a\x0d\x0a");
delay(244);
delay(244);
delay(244);
delay(244);
WriteCHS(0,0,1,16); //写地址
WaitBSY();
WriteReg(_Status_Command,0x20); //发送读命令
SendData();
send_string("\x0d\x0a\x0d\x0a Read OK,Now Shut Down The HardDisk..\x0d\x0a");
SpinDown(); //硬盘停转
while(1);
}

//**************************************串口子程序
void send_char(unsigned char word)
{
TI=0;
SBUF=word;
while(TI==0);
TI=0;
}

void send_string(unsigned char *word)
{
TI=0;
while(*word!=0)
{
SBUF=*word;
while(TI==0);
TI=0;
word++;
}
}

unsigned char get_char(void)
{
RI=0;
REN=1;
while(RI==0);
return(SBUF);
RI=0;
REN=0;
}