76 lines
1.2 KiB
C
Executable File
76 lines
1.2 KiB
C
Executable File
// Timer 0 take as interrupt
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// Timer 1 take as delay
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#include <reg51.h>
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// 宣告延時函式
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void delay10ms(void);
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unsigned int timer0_counter = 150;
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void main(void){
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//開啟 Timer0 和 Timer1
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TMOD = 0x11;
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//interrupt control
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TL0 = (65536 - 9216) % 256;
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TH0 = (65536 - 9216) / 256;
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TF0 = 0;
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TR0 = 1; //開啟計時器 timer0
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ET0 = 1; //開啟 TF0 的中斷模組開關
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EA = 1; //開啟中斷模組總開關
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delay10ms();
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while(1){
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// do LED move up to down per 1.5 sec
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// using Timer 1 Mode 1 to generate 10ms delay
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}
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}
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void delay10ms(void){
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//設定初始值
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TF1 = 0;
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TR1 = 0;
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TL1 = (65536-9216) % 256;
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TH1 = (65536-9216) / 256;
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//開啟計時器 timer1
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TR1 = 1;
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//當 TF1 沒有溢位
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while(TF1 == 0);
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//關閉計時器
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TR1 = 0;
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//將 TF1 歸零
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TF1 = 0;
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}
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// timer0 在計時到的時候(TF0 = 1)會呼叫的中斷副函式
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void my_timer0(void) interrupt 1 {
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//設定初始值
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TL0 = (65536 - 9216) % 256;
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TH0 = (65536 - 9216) / 256;
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TF0 = 0;
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// timer0_counter 一直遞減
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timer0_counter--;
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//當 timer0_counter 為 0 時，實作七段顯示器
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if (timer0_counter == 0){
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// 實作七段顯示器
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//將 timer0_counter 的值設回 150
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timer0_counter = 150;
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}
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}
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