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#include "reg52.h" /****************************** 用户定义宏 ***********************************/ #define MAIN_Fosc 11059200UL //定义主时钟 //#define MAIN_Fosc 22118400UL //定义时钟 /*****************************************************************************/ /******************** 下面的宏自动生成, 用户不可修改 **************************/ #define Timer0_Reload (MAIN_Fosc / 12000) /*****************************************************************************/ /************* 本地常量声明 **************/ unsigned char code t_display[]={ // 0 1 2 3 4 5 6 7 8 9 A B C D E F 消隐 0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71,0x00}; //段码 unsigned char code T_COM[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80}; //位码 /************* 本地变量声明 **************/ //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]; //显示缓冲 unsigned char display_index; //显示位索引 bit B_1ms; //1ms标志 /**********************************************/ 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; //上电消隐 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; //刷新显示 if(++k > 0x10) k = 0; //8个数码管循环显示0,1,2...,A,B..F,消隐. } } } /**********************************************/ /**********************************************/ void Send_595(unsigned char dat) //发送一个字节 { 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) //显示扫描函数 { // Send_595(~T_COM[display_index]); //共阴 输出位码 // Send_595(t_display[LED8[display_index]]); //共阴 输出段码 Send_595(T_COM[display_index]); //共阳 输出位码 Send_595(~t_display[LED8[display_index]]); //共阳 输出段码 P_HC595_RCLK = 1; P_HC595_RCLK = 0; //锁存输出数据 if(++display_index >= 8) display_index = 0; //8位结束回0 } /**********************************************/ void timer0 (void) interrupt 1 //Timer0 1ms中断函数 { TH0 = (65536 - Timer0_Reload) / 256; //重装定时值 TL0 = (65536 - Timer0_Reload) % 256; DisplayScan(); //1ms扫描显示一位 B_1ms = 1; //1ms标志 } |
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