单片机课程设计报告(17)

单片机课程设计报告

if(SID) y++ ; }

return ((0xf0&x)+(0x0f&y)) ; }

void CheckBusy( void ) {

do SendByte(0xfc) ; //11111,RW(1),RS(0),0 while(0x80&ReceiveByte()) ; //BF(.7)=1 Busy }

void WriteCommand( unsigned char Cbyte ) {

CS = 1 ;

CheckBusy() ;

SendByte(0xf8) ; //11111,RW(0),RS(0),0 SendByte(0xf0&Cbyte) ; //高四位

SendByte(0xf0&Cbyte<<4) ;//低四位(先执行<< ;) CS = 0 ; }

void WriteData( unsigned char Dbyte ) {

CS = 1 ;

CheckBusy() ;

SendByte(0xfa) ; //11111,RW(0),RS(1),0 SendByte(0xf0&Dbyte) ; //高四位

SendByte(0xf0&Dbyte<<4) ;//低四位(先执行<< ;) CS = 0 ; }

/*unsigned char ReadData( void ) {

CheckBusy() ;

SendByte(0xfe) ; //11111,RW(1),RS(1),0 return ReceiveByte() ; }*/

void Delay(unsigned int MS) {

unsigned char us,usn ;

while(MS!=0) //for 12M { usn = 2 ;

while(usn!=0)