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請問大佬們，做點陣led流動字體精確延時移動時，無意間發(fā)現(xiàn)設(shè)置變量flag1s 與TF0下延時時間不相同，不太明白，求教各位啦
單片機源程序如下:
用TF0時
#include <reg52.h>
sbit ADDR0 = P1^0;
sbit ADDR1 = P1^1;
sbit ADDR2 = P1^2;
sbit ADDR3 = P1^3;
sbit ENLED = P1^4;
unsigned char code image[]={
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0x7D,0x01,0x01,0x7D,0xFF,0xFF,0xE3,0xC1,
0x81,0x03,0x03,0x81,0xC1,0xE3,0xFF,0xFF,
0x81,0x01,0x3F,0x3F,0x3F,0x01,0x81,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};
void main()
{
ENLED = 0;
ADDR3 = 0;
EA = 1;
TMOD = 0x01;
TH0 = 0xFC;
TL0 = 0x67;
TR0 = 1;
ET0 = 1;
while(1)
{
if(TF0 == 1)
{
TF0 =0;
}
}
}
void interrupttime0() interrupt 1
{
static unsigned char index = 0;
static unsigned char i = 0;
static unsigned int tmr = 0;
TH0 = 0xFC;
TL0 = 0x67;
P0 = 0xFF;
switch(i)
{
case 0:ADDR2 = 0;ADDR1 = 0;ADDR0 = 0;i++;P0=image[index+0];break;
case 1:ADDR2 = 0;ADDR1 = 0;ADDR0 = 1;i++;P0=image[index+1];break;
case 2:ADDR2 = 0;ADDR1 = 1;ADDR0 = 0;i++;P0=image[index+2];break;
case 3:ADDR2 = 0;ADDR1 = 1;ADDR0 = 1;i++;P0=image[index+3];break;
case 4:ADDR2 = 1;ADDR1 = 0;ADDR0 = 0;i++;P0=image[index+4];break;
case 5:ADDR2 = 1;ADDR1 = 0;ADDR0 = 1;i++;P0=image[index+5];break;
case 6:ADDR2 = 1;ADDR1 = 1;ADDR0 = 0;i++;P0=image[index+6];break;
case 7:ADDR2 = 1;ADDR1 = 1;ADDR0 = 1;i=0;P0=image[index+7];break;
}
if(TF0 == 0)
{
TF0 =1;
tmr++ ;
if(tmr>=1000)
{
tmr =0;
index ++;
if(index >=32)
{
index = 0;
}
}
}
}
控制flag1s條件時
#include <reg52.h>
sbit ADDR0 = P1^0;
sbit ADDR1 = P1^1;
sbit ADDR2 = P1^2;
sbit ADDR3 = P1^3;
sbit ENLED = P1^4;
unsigned char code image[]={
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0x7D,0x01,0x01,0x7D,0xFF,0xFF,0xE3,0xC1,
0x81,0x03,0x03,0x81,0xC1,0xE3,0xFF,0xFF,
0x81,0x01,0x3F,0x3F,0x3F,0x01,0x81,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};
unsigned char flag1s = 0;
void main()
{
ENLED = 0;
ADDR3 = 0;
EA = 1;
TMOD = 0x01;
TH0 = 0xFC;
TL0 = 0x67;
TR0 = 1;
ET0 = 1;
while(1)
{
if(flag1s == 1)
{
flag1s =0;
}
}
}
void interrupttime0() interrupt 1
{
static unsigned char index = 0;
static unsigned char i = 0;
static unsigned int tmr = 0;
TH0 = 0xFC;
TL0 = 0x67;
P0 = 0xFF;
switch(i)
{
case 0:ADDR2 = 0;ADDR1 = 0;ADDR0 = 0;i++;P0=image[index+0];break;
case 1:ADDR2 = 0;ADDR1 = 0;ADDR0 = 1;i++;P0=image[index+1];break;
case 2:ADDR2 = 0;ADDR1 = 1;ADDR0 = 0;i++;P0=image[index+2];break;
case 3:ADDR2 = 0;ADDR1 = 1;ADDR0 = 1;i++;P0=image[index+3];break;
case 4:ADDR2 = 1;ADDR1 = 0;ADDR0 = 0;i++;P0=image[index+4];break;
case 5:ADDR2 = 1;ADDR1 = 0;ADDR0 = 1;i++;P0=image[index+5];break;
case 6:ADDR2 = 1;ADDR1 = 1;ADDR0 = 0;i++;P0=image[index+6];break;
case 7:ADDR2 = 1;ADDR1 = 1;ADDR0 = 1;i=0;P0=image[index+7];break;
}
if(flag1s == 0)
{
flag1s =1;
tmr++ ;
if(tmr>=1000)
{
tmr =0;
index ++;
if(index >=32)
{
index = 0;
}
}
}
}
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