?? time.c
字號:
#include <time.h>
unsigned int timeerout=0;
void DelayMs( unsigned int ms )
{
StartTimer( ms );
while( timeerout );
StopTimer( );
}
void timer0 (void) interrupt 1
{
if( timeerout!=0 ) timeerout--;
TL0 =240; //12mhz.10ms
TH0 =216;
}
void StartTimer( unsigned int ms )
{
TR0 = 0;//stop timer0
ET0 = 0;//disable timer0
timeerout = ms;
//start timer 0
TMOD &= 0xf0;
TMOD |= 0x01;//timer0 mod = 1
TL0 =240; //12mhz.10ms
TH0 =216;
TF0 = 0;//clear int. flag
TR0 = 1;//start timer0
ET0 = 1;//enable timer
}
void StopTimer( )
{
TR0 = 0;//stop timer0
ET0 = 0;//disable timer0
}
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