|
#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
} |
阿莫论坛20周年了!感谢大家的支持与爱护!!
曾经有一段真挚的爱情摆在我的面前,我没有珍惜,现在想起来,还好我没有珍惜……
|