本科生课程设计（论文）
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unsigned char TH0D=0xFF; unsigned char TL0D=0x00; unsigned char index=0; unsigned char *ptr; //1ms延时函数
void delayms(unsigned int i) {
unsigned int j; for(;i!=0;i--) {
for(j=0;j<123;j++); }
//定时器0初始化函数 void timer0_init(void) {
TMOD=0x11; TH0=TH0D; TL0=TL0D; ET0=1; EA=1; TR0=1;
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}
本科生课程设计（论文）
}
//定时器T0中断函数
void timer0_isr(void)interrupt 1 using 0 {
P2_7=~P2_7; TH0=TH0D; TL0=TL0D; P1=ptr[index]; index++; } //主程序 int main(void) {
timer0_init(); ptr=sin_tab; while(1) {
if(!P2_0) {
delayms(10); if(!P2_0)TL0D++; }
else if(!P2_1) {
delayms(10); if(!P2_1)TL0D--; } else if(!P2_2)
{
ptr= Triangle_tab; } else
{
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本科生课程设计（论文）
}
ptr=sin_tab; } } return 0;
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