reset: homework7

homework7/src/homework7.h

@@ -1,73 +0,0 @@
-/*
- * name: homework7.h
- * author: msksbr
- * date: 2025/05/22
- * description: a header file for homework7(a 51 MCU lesson homework)
- * version: 1.0
- * variables:
- *    1.0:
- *        1. pin numbers for BUS of leds, segs and matrix led
- *        2. pin numbers for BUS of 74HC138
- * functions:
- *    1.0:
- *        1. 74HC138 switcher
- *        2. timer by ms based on timer0 with mode 1
- */
-
-#include <REG52.H>
-
-// variables:
-// 1. pin numbers for BUS of leds, segs and matrix led
-sbit DB0 = P0 ^ 0;
-sbit DB1 = P0 ^ 1;
-sbit DB2 = P0 ^ 2;
-sbit DB3 = P0 ^ 3;
-sbit DB4 = P0 ^ 4;
-sbit DB5 = P0 ^ 5;
-sbit DB6 = P0 ^ 6;
-sbit DB7 = P0 ^ 7;
-// 2. pin numbers for BUS of 74HC138
-sbit ADDR0 = P1 ^ 0; // @param ADDR0: to A(A0) of 74HC138
-sbit ADDR1 = P1 ^ 1; // @param ADDR1: to B(A1) of 74HC138
-sbit ADDR2 = P1 ^ 2; // @param ADDR2: to C(A2) of 74HC138
-
-sbit ADDR3 = P1 ^ 3; // @param ADDR3: to E1 of 74HC138
-sbit ENLED = P1 ^ 4; // @param ENLED: to E2 & E3 of 74HC138
-
-// functions:
-// 1. 74HC138 switcher
-void switch_38(unsigned char n)
-{
-    // @subsection: turn n to 3 bits of binary number
-    bit A0 = n & 0x01;
-    bit A1 = (n >> 1) & 0x01;
-    bit A2 = (n >> 2) & 0x01;
-    // @subsection: turn on 74HC138
-    ENLED = 0;
-    ADDR3 = 1;
-    // @subsection: add 3 bits of binary number to 74HC138
-    ADDR0 = A0;
-    ADDR1 = A1;
-    ADDR2 = A2;
-}
-// 2. timer by ms based on timer0 with mode 1
-void timer0_mode1(unsigned int ms)
-{
-    unsigned int i;
-    // @subsection: set timer0 to mode 1
-    TMOD = 0x01;
-    // @subsection: set timer0 to 11.0592MHz
-    TH0 = 0xFC;
-    TL0 = 0x67;
-    // @subsection: start timer0
-    TR0 = 1;
-    // @subsection: wait for timer0 to count ms times
-    for (i = 0; i < ms; i++) {
-        while (!TF0);
-        TF0 = 0;
-        TH0 = 0xFC;
-        TL0 = 0x67;
-    }
-    // @subsection: stop timer0
-    TR0 = 0;
-}