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#include "reg52.h" /****************************** 用戶定義宏 ***********************************/ #define MAIN_Fosc 11059200UL //定義主時鐘 //#define MAIN_Fosc 22118400UL //定義時鐘 /*****************************************************************************/ /******************** 下面的宏自動生成, 用戶不可修改 **************************/ #define Timer0_Reload (MAIN_Fosc / 12000) /*****************************************************************************/ /************* 本地常量聲明 **************/ unsigned char code t_display[]={ // 0 1 2 3 4 5 6 7 8 9 A B C D E F 消隱 0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71,0x00}; //段碼 unsigned char code T_COM[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80}; //位碼 /************* 本地變量聲明 **************/ //sbit P_HC595_SER = P3^2; //pin 14 SER data input //sbit P_HC595_RCLK = P3^4; //pin 12 RCLk store (latch) clock //sbit P_HC595_SRCLK = P3^3; //pin 11 SRCLK Shift data clock sbit P_HC595_SER = P1^5; //pin 14 SER data input sbit P_HC595_RCLK = P1^4; //pin 12 RCLk store (latch) clock sbit P_HC595_SRCLK = P1^7; //pin 11 SRCLK Shift data clock unsigned char LED8[8]; //顯示緩沖 unsigned char display_index; //顯示位索引 bit B_1ms; //1ms標志 /**********************************************/ void main(void) { unsigned char i,k; unsigned int j; TMOD = 0x01; //Timer 0 config as 16bit timer, 12T TH0 = (65536 - Timer0_Reload) / 256; TL0 = (65536 - Timer0_Reload) % 256; ET0 = 1; TR0 = 1; EA = 1; for(i=0; i<8; i++) LED8[i] = 0x10; //上電消隱 j = 0; k = 0; // for(i=0; i<8; i++) LED8[i] = i; while(1) { while(!B_1ms) ; //等待1ms到 B_1ms = 0; if(++j >= 500) //500ms到 { j = 0; for(i=0; i<8; i++) LED8[i] = k; //刷新顯示 if(++k > 0x10) k = 0; //8個數碼管循環顯示0,1,2...,A,B..F,消隱. } } } /**********************************************/ /**********************************************/ void Send_595(unsigned char dat) //發送一個字節 { unsigned char i; for(i=0; i<8; i++) { if(dat & 0x80) P_HC595_SER = 1; else P_HC595_SER = 0; P_HC595_SRCLK = 1; P_HC595_SRCLK = 0; dat = dat << 1; } } /**********************************************/ void DisplayScan(void) //顯示掃描函數 { // Send_595(~T_COM[display_index]); //共陰 輸出位碼 // Send_595(t_display[LED8[display_index]]); //共陰 輸出段碼 Send_595(T_COM[display_index]); //共陽 輸出位碼 Send_595(~t_display[LED8[display_index]]); //共陽 輸出段碼 P_HC595_RCLK = 1; P_HC595_RCLK = 0; //鎖存輸出數據 if(++display_index >= 8) display_index = 0; //8位結束回0 } /**********************************************/ void timer0 (void) interrupt 1 //Timer0 1ms中斷函數 { TH0 = (65536 - Timer0_Reload) / 256; //重裝定時值 TL0 = (65536 - Timer0_Reload) % 256; DisplayScan(); //1ms掃描顯示一位 B_1ms = 1; //1ms標志 } |
