archieve: homework6 test1

homework6/src/homework6.h

@@ -3,6 +3,7 @@
  * this is the header file to
  * define the
  * variables:
+ * - 38 transistors address
  * - pins for the LEDs and the segs
  * - pins for the 38 transistors
  * - seg chars to display to display the number
@@ -13,6 +14,9 @@
 #include <REG52.H>
 
 // variables:
+// 38 transistors address
+#define LEDS   [6]{0, 1, 2, 3, 4, 5}
+#define TO_LED 6
 // pins for the LEDs and the segs
 sbit BUS1A  = P2 ^ 0; // Red LED and A Seg
 sbit BUS2B  = P2 ^ 1; // Orange LED and B Seg

homework6/src/test1.c

@@ -0,0 +1,42 @@
+// 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.
+
+#include "homework6.h"
+
+void test1()
+{
+    // Set the 38 transistors to the address.
+    set38(TO_LED);
+    // init the timer 0.
+    TMOD = 0x01; // set the timer 0 to mode 1.
+    TH0  = 0xFC; // set the timer 0 to 1s.
+    TL0  = 0x66; // set the timer 0 to 1s.
+    TR0  = 1;    // start the timer 0.
+    ET0  = 1;    // enable the timer 0 interrupt.
+    EA   = 1;    // enable the interrupt.
+    P2   = 0xFE; // init mode: the first LED light.
+    while (1) {}
+}
+
+void Timer0_ISR() interrupt 1
+{
+    static unsigned int counter = 0;    // counter to count the number of interrupts.
+    static unsigned char led    = 0xFE; // store the LED light.
+
+    // reset the timer 0.
+    TH0 = 0xFC; // set the timer 0 to 1s.
+    TL0 = 0x66; // set the timer 0 to 1s.
+
+    if (++counter >= 1000) {
+        counter = 0;                 // reset the counter.
+        led     = (led << 1) | 0x01; // shift the LED light to the left.
+        if (led == 0xFF) led = 0xFE; // if the LED light is 0xFF, reset the LED light to 0xFE.
+        P2 = led;                    // set the LED light.
+    }
+}
+
+void main()
+{
+    test1();
+}