archieve: homework6 test2

homework6/src/test1.c

@@ -1,6 +1,8 @@
 // test1.c
 // 定时器0中断实现流水灯，设定合适的初值实现1s定时，控制LED灯依次点亮，形成流水灯效果
-// Timer 0 interrupt to implement the LED light, set the appropriate initial value to implement 1s timing, control the LED light to turn on one by one, forming the light effect.
+// Timer 0 interrupt to implement the LED light,
+// set the appropriate initial value to implement 1s timing,
+// control the LED light to turn on one by one, forming the light effect.
 
 #include "homework6.h"
 

homework6/src/test2.c

@@ -0,0 +1,39 @@
+// test2.c
+// 定时器1中断控制两个LED交替闪烁。设置定时器1的初值，使其每隔25ms产生一次中断。
+// 在中断服务程序中，每次中断对两个LED的状态进行切换，一个LED亮时另一个LED灭，
+// 从而实现交替闪烁
+// Timer 1 interrupt to control two LED lights to alternate.
+// Set the initial value of the timer 1 to make it produce an interrupt every 25ms.
+// In the interrupt service program,
+// switch the state of the two LED lights every time an interrupt occurs,
+// one LED light on at a time, and the other LED light off,
+// thus implementing alternating flashing.
+
+#include "homework6.h"
+
+void test2()
+{
+    // Set the 38 transistors to the address.
+    set38(TO_LED);
+    // init the timer 1.
+    TMOD = 0x9E; // set the timer 1 to mode 1.
+    TH1  = 0x58; // set the timer 1 to 25ms.
+    TL1  = 0x66; // set the timer 1 to 25ms.
+    TR1  = 1;    // start the timer 1.
+    ET1  = 1;    // enable the timer 1 interrupt.
+    EA   = 1;    // enable the interrupt.
+    P2   = 0xFC; // init mode: the first LED light.
+    while (1) {}
+}
+
+void Timer1_ISR() interrupt 3
+{
+    TH1 = 0x9E; // reset the timer 1.
+    TH1 = 0x58; // reset the timer 1.
+    P2 ^= 0x03; // switch the state of the two LED lights.
+}
+
+void main()
+{
+    test2();
+}