?? main.c
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#include <hidef.h> /* for EnableInterrupts macro */
#include <MC68HC908SR12.h> /* include peripheral declarations */
uint temp1, temp2;
uchar F_data;
void delay(uint num)
{
uint i;
for(i=0;i<num;i++)
{}
}
void main(void) {
EnableInterrupts; /* enable interrupts */
/* include your code here */
CONFIG1=0x09; //關閉看門狗,5V模式
T1SC_TSTOP=1; //關閉定時器
T1SC_TRST=1; //reset T1,counter歸0
T1SC=0x06; //開啟定時器, 分頻系數64(bus clock is 2.4576MHz,timer clock is 38.4KHz)
// T1SC0=0x4c;//使能捕獲中斷,上升沿和下降沿捕獲。
// T1SC0=0x44;//使能捕獲中斷,上升沿捕獲。
T1SC0=0x48;//使能捕獲中斷,下升沿捕獲。
temp1=0;
temp2=0;
F_data=0;
DDRD=0xff;//輸出模式
PTD=0;
while(1)
{
if(temp1>=temp2)
{
F_data=(uchar)(temp1-temp2);
}
else
{
F_data=(uchar)(0xffff-temp2+temp1);
}
PTD=0xff;//light the leds
delay(5000);
delay(5000);
delay(5000);
delay(5000);
delay(5000);
PTD=F_data; //if there's no input,F_data will always be 0
delay(5000);
delay(5000);
delay(5000);
delay(5000);
delay(5000);
delay(5000);
delay(5000);
delay(5000);
delay(5000);
delay(5000);
PTD=(F_data<<4);
delay(5000);
delay(5000);
delay(5000);
delay(5000);
delay(5000);
delay(5000);
delay(5000);
delay(5000);
delay(5000);
delay(5000);
}
}
interrupt void T1_CH0_ISR(void)
{
T1SC0_CH0IE=0;
T1SC0_CH0F=0;
temp2=temp1;
temp1=T1CH0H;
temp1=(temp1<<8)+T1CH0L;
T1SC0_CH0IE=1;
//PTD=0x55;
}
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