?? b04.c
字號:
// “模仿式” 實(shí)驗(yàn)四 V/F壓頻轉(zhuǎn)換實(shí)驗(yàn)
//不對
#include <reg51.h>
#include <absacc.h>
#define LEDLen 6
#define mode 0x03
#define uchar unsigned char
xdata unsigned char OUTBIT _at_ 0xe101; // 位控制口
xdata unsigned char CLK164 _at_ 0xe102; // 段控制口(接164時(shí)鐘位)
xdata unsigned char DAT164 _at_ 0xe102; // 段控制口(接164數(shù)據(jù)位)
xdata unsigned char IN _at_ 0xe103; // 鍵盤讀入口
xdata unsigned char CAddr _at_ 0xe100;
unsigned char LEDBuf[LEDLen]; // 顯示緩沖
code unsigned char LEDMAP[] = { // 八段管顯示碼
0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07,
0x7f, 0x6f, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71
};
uchar count=0;
void timer0() interrupt 1 using 1
{ long int hz;
uchar j;
count++;
if(count==20)
{
hz=TH1*256+TL1;
TH1=0;
TL1=0;
for(j=0;j<6;j++)
{
LEDBuf[5-j]=LEDMAP[hz%10];
hz=hz/10;
}
count=0;
}
TL0=-(50000%256);
TH0=-(50200/256);
}
void Delay(unsigned char CNT)
{
unsigned char i;
while (CNT-- !=0)
for (i=100; i !=0; i--);
}
void DisplayLED()
{
unsigned char i, j;
unsigned char Pos;
unsigned char LED;
Pos = 0x20; // 從左邊開始顯示
for (i = 0; i < LEDLen; i++) {
OUTBIT = 0; // 關(guān)所有八段管
LED = LEDBuf[i];
for (j = 0; j < 8; j++) { // 送164
if (LED & 0x80) DAT164 = 1; else DAT164 = 0;
CLK164 = CLK164|0x02;
CLK164 = CLK164&0xfd;
LED <<= 1;
}
OUTBIT = Pos; // 顯示一位八段管
Delay(1);
Pos >>= 1; // 顯示下一位
}
OUTBIT = 0; // 關(guān)所有八段管
}
void main()
{
CAddr = mode;
TMOD = 0X51;
TL0=-(49000%256);
TH0=-(50200/256);
TR0 = 1;
TR1=1;
ET0=1;
EA=1;
while(1)
DisplayLED(); // 延時(shí)
}
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