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標題: 8051單片機控制8*8點陣時，不用譯碼器可以嗎？ [打印本頁]

作者: 深海皮皮蝦仁 時間: 2019-5-24 11:31
標題: 8051單片機控制8*8點陣時，不用譯碼器可以嗎？
8051單片機控制8*8點陣時，不用譯碼器可以嗎？8*8總共燈的數量大于51單片機接口數量，但是又不會用譯碼器，有沒有不用譯碼器實現控制的方法啊，比如顯示特定兩位數字之類的。

作者: Angle丶陽 時間: 2019-7-18 10:06
protuse可以做到的 8*8點陣陽極接P2口，陰極接P1口，用下面的代碼就可以實現！
#define uchar unsigned char
void Init_int();
void Init_time();
void display(int yin,int yang);
uchar num_num[10][5]={{0xf0,0xf6,0xf6,0xf6,0xf0},    //0
   {0xf7,0xf7,0xf7,0xf7,0xf7},    //1
   {0xf0,0xfe,0xf0,0xf7,0xf0},       //2
   {0xf0,0xfe,0xf0,0xfe,0xf0},    //3
   {0xf6,0xf6,0xf0,0xfe,0xfe},    //4
   {0xf0,0xf7,0xf0,0xfe,0xf0},    //5
   {0xf0,0xf7,0xf0,0xf6,0xf0},    //6
   {0xf0,0xfe,0xfe,0xfe,0xfe},    //7
   {0xf0,0xf6,0xf0,0xf6,0xf0},    //8
   {0xf0,0xf6,0xf0,0xfe,0xf0}};    //9
uchar num_zero[5]={0xf0,0xf6,0xf6,0xf6,0xf0};
uchar num_one[5]={0xfe,0xfe,0xfe,0xfe,0xfe};
uchar num_two[5]={0xf0,0xfe,0xf0,0xf7,0xf0};
uchar num_three[5]={0xf0,0xfe,0xf0,0xfe,0xf0};
uchar num_fore[5]={0xf6,0xf6,0xf0,0xfe,0xfe};
uchar num_five[5]={0xf0,0xf7,0xf0,0xfe,0xf0};
uchar num_six[5]={0xf0,0xf7,0xf0,0xf6,0xf0};
uchar num_seven[5]={0xf0,0xfe,0xfe,0xfe,0xfe};
uchar num_eight[5]={0xf0,0xf6,0xf0,0xf6,0xf0};
uchar num_nine[5]={0xf0,0xf6,0xf0,0xfe,0xf0};
unsigned int count,i=1,weiyi,timer,shu,n=1;

void main()
{
Init_time();
Init_int();
while(1)
{}
}

void Init_time()    //定時器初始化
{
TMOD|=0x01;
TH0=0xff;
TL0=0x10;
TR0=1;
ET0=1;
EA=1;
}

void Init_int()                //中斷初始化
{
EA=1;
EX0=1;
ET0=1;
}

void time() interrupt 1    //定時器函數
{
TH0=0xfd;                   //50微秒
TL0=0xa8;
count++;
if(count>8)
{
count=0;
display(i-1,i);
i++;
if(i>5)
i=1;
}
timer++;
if(timer>250)
{
timer=0;
weiyi++;
if(weiyi>10)
{
weiyi=0;
shu++;
if(shu>9)
shu=0;
}
}
}

void display(int yin,int yang)                //顯示函數
{
P2 = 0x00;
P1 = ~(~num_num[shu][yin]<<weiyi);
if(weiyi<3)
{
P1 = ~(~num_num[shu][yin]>>3-weiyi);
}
else
{
P1 = ~(~num_num[shu][yin]<<weiyi-3);
}
switch(yang)
{
case 0 : P2 = 0x01;break;
case 1 : P2 = 0x02;break;
case 2 : P2 = 0x04;break;
case 3 : P2 = 0x08;break;
case 4 : P2 = 0x10;break;
case 5 : P2 = 0x20;break;
case 6 : P2 = 0x40;break;
case 7 : P2 = 0x80;break;
default : P2 = 0x00; break;
}
}

作者: bxyyhan 時間: 2020-2-5 09:11
只要單片機有16個口就行，陽極接一組，比如P2口，陰極接一組，比如P0。

作者: wxl2020 時間: 2020-2-6 11:12
可以，我之前就做過

作者: banalsheep 時間: 2020-2-6 12:58
矩陣（并行，不用譯碼）接法，8+8個IO可行

作者: hantu 時間: 2020-2-6 13:55
可以，不用譯碼器（74HC138等）還可以用其它鎖存器的嘛，比如74HC595、74HC573等等，也可以直接單片機引腳加三級管直接驅動都行。

但是，如果你是用現成的板，那么它用了什么東西你就得用它的呀。

歡迎光臨 (http://www.raoushi.com/bbs/)

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