pic16f877a芯片用两个74hc595和一个74hc154芯片设计16*16点阵。请问怎样显示汉字啊。
我用74hc154行扫描,显示的汉字乱作一团,不该亮的点都亮了,请问我应该怎样做啊?!
程序如下:#include<pic.h>
#define uint unsigned int
#define uchar unsigned char
__CONFIG(0XFF31);
void delay(uint z);
void out595();
void write595(uint dat);
void display();
void displays(uint timer);
uchar temp[32]; //缓存区
const t0[16]={0xf0,0x70,0xb0,0x30,0xd0,0x50,0x90,0x10,0xe0,0x60,0xa0,0x20,0xc0,0x40,0x80,0x00}; //行扫描
const t1[32]={0x00,0x00,0x00,0x08,0x7F,0xFC,0x01,0x00,0x01,0x00,0x01,0x00,0x01,0x00,0x01,0x00,
0x01,0x00,0x01,0x00,0x01,0x00,0x01,0x00,0x01,0x04,0xFF,0xFE,0x00,0x00,0x00,0x00}; //汉字“工”
const t2[32]={0x00,0x00,0x7F,0xF8,0x00,0x10,0x00,0x20,0x00,0x40,0x01,0x80,0x01,0x00,0x01,0x00,
0x01,0x00,0x01,0x00,0x01,0x00,0x01,0x00,0x01,0x00,0x01,0x00,0x05,0x00,0x02,0x00}; //汉字“了”
void main()
{ uint m=0,j=0;
TRISD=0;
for(j=0;j<32;j++)
temp[j]=t1[j];
displays(2);
for(j=0;j<32;j++)
temp[j]=t2[j];
displays(2);
}
void write595(uint dat)
{ uint i;
TRISB=0;
for(i=0;i<8;i++)
{ RB5=0;
if((dat&0x01)==0x01)
RB6=1;
else
RB6=0;
dat>>=1;
RB5=1;
}
}
void out595()
{
TRISB=0;
RB7=0;
RB7=1;
}
void delay(uint z)
{
uint i,j;
for(i=0;i<z;i++)
for(j=100;j>0;j--);
}
void display()
{
int i,j,k;
TRISD=0;
for(i=0;i<16;i++)
{
for(j=2;j>0;)
{
PORTD=t0
;
j--;
write595(temp[i*2+j]);
out595();
delay(2);
}
}
k=100;
while(k--);
}
void displays(uint timer)
{
unsigned char i;
while(timer--)
{
i=110;
while(i--)
display();
}
}
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