4*4鍵盤,有一個鍵一直無效,硬件沒有問題,肯定是軟件的問題,因爲用軟件獨立測試也沒有問題,很有趣,記錄下來,就跟魔術解密一樣,趁還沒有解密,記錄一下,找到問題了就索然無味了。源代碼如下
u8 KEY_Scan(void)
{
u8 KEY=0;
H1 = 1;H2 = 0;H3 = 0;H4 = 0;
if(L1==1||L2==1||L3==1||L4==1)
{
delay_ms(5);
if(L1==1||L2==1||L3==1||L4==1)
{
if(L4==1)
{
KEY2=KEY_Scan_2();
switch(KEY2)
{
case KEY_UP:
KEY=KEY_OK_UP;
return KEY;
case KEY_DOWN:
KEY=KEY_OK_DOWN;
return KEY;
case KEY_LEFT:
KEY=KEY_OK_LEFT;
return KEY;
case KEY_RIGHT:
KEY=KEY_OK_RIGHT;
return KEY;
default:
KEY=KEY4_PRES;
break;
}
}
else if(L2==1)
KEY=KEY2_PRES;
else if(L3==1)
KEY=KEY3_PRES;
else if(L1==1)
KEY=KEY1_PRES;
}
}
//while((L1|L2|L3||L4) > 0);
H1 = 0;H2 = 1;H3 = 0;H4 = 0;
if(L1==1||L2==1||L3==1||L4==1)
{
delay_ms(5);
if(L1==1||L2==1||L3==1||L4==1)
{
if(L1==1)
KEY=KEY5_PRES;
else if(L2==1)
KEY=KEY6_PRES;
else if(L3==1)
KEY=KEY7_PRES;
else if(L4==1)
KEY=KEY8_PRES;
}
}
//while((L1|L2|L3||L4) > 0);
H1 = 0;H2 = 0;H3 = 1;H4 = 0;
if(L1==1||L2==1||L3==1||L4==1)
{
delay_ms(5);
if(L1==1||L2==1||L3==1||L4==1)
{
if(L1==1)
KEY=KEY9_PRES;
else if(L2==1)
KEY=KEY10_PRES;
else if(L3==1)
KEY=KEY11_PRES;
else if(L4==1)
KEY=KEY12_PRES;
}
}
//while((L1|L2|L3||L4) > 0);
H1 = 0;H2 = 0;H3 = 0;H4 = 1;
if(L1==1||L2==1||L3==1||L4==1)
{
delay_ms(5);
if(L1==1||L2==1||L3==1||L4==1)
{
if(L1==1)
KEY=KEY13_PRES;
else if(L2==1)
KEY=KEY14_PRES;
else if(L3==1)
KEY=KEY15_PRES;
else if(L4==1)
KEY=KEY16_PRES;
}
}
//while((L1|L2|L3||L4) > 0);
return KEY;
}