求助，矩阵键盘 反转程序一直返回0XFF，去掉return 0xff，...
本帖最后由 fangwenbo0002 于 2016-9-30 21:35 编辑#include "key.h"
#include "STC15F2K60S2.h"
#include "lcd1202.h"
//#define keydat P0
#define uchar unsigned char
uchar Key_Scan()
{
uchar keyval,key_h,key_l;
P0=0x0f;
key_l=P0&0x0f;
if(key_l!=0x0f)
{
delay1ms(10);
if(key_l!=0x0f)
{
key_l=P0&0x0f;
P0=key_l|0xf0;
key_h=P0&0xf0;
key_l=key_l&0x0f;
keyval=key_h+key_l;
//Lcd_Show_String(keyval,0,0);
return keyval;
}
}return 0xff;
}
void Key_Display()
{
uchar key;
key=Key_Scan();
if(key!=0xff)
{
switch(key)
{
case 0xee: Lcd_Show_String("1:ee",0,0);break;
case 0xed: Lcd_Show_String("1:ed",0,0);break;
case 0xeb: Lcd_Show_String("1:eb",0,0);break;
case 0xe7: Lcd_Show_String("1:e7",0,0);break;
case 0xde: Lcd_Show_String("1:de",0,0);break;
case 0xdd: Lcd_Show_String("1:dd",0,0);break;
case 0xdb: Lcd_Show_String("1:db",0,0);break;
case 0xd7: Lcd_Show_String("1:d7",0,0);break;
case 0xbe: Lcd_Show_String("1:be",0,0);break;
case 0xbd: Lcd_Show_String("1:bd",0,0);break;
case 0xbb: Lcd_Show_String("1:bb",0,0);break;
case 0xb7: Lcd_Show_String("1:b7",0,0);break;
case 0x7e: Lcd_Show_String("1:7e",0,0);break;
case 0x7d: Lcd_Show_String("1:7d",0,0);break;
case 0x7b: Lcd_Show_String("1:7b",0,0);break;
case 0x77: Lcd_Show_String("1:77",0,0);break;
}
}
else
Lcd_Show_String("0xff",0,0);
}
主函数
int main(void)
{
P1M0=0x00;
P1M1=0x00;
P2M0=0x00;
P2M1=0x00;
P3M0=0x00;
P3M1=0x00;
P4M0=0x00;
P4M1=0x00;
Lcd_Init();
while(1)
{
Key_Display();
} 行输出高电平，列读取；列输出高平，行读取。 我已经弄好了，修改后的程序为：
uchar Key_Scan()
{
uchar keyval,key_h,key_l;
P0=0x0f;
delay1ms(1);
key_l=P0&0x0f;
if(key_l!=0x0f)
{
delay1ms(10);
key_l=P0&0x0f;
if(key_l!=0x0f);
{
key_l=P0&0x0f;
P0=key_l|0xf0;
delay1ms(1);
key_h=P0&0xf0;
//key_l=key_l&0x0f;
keyval=key_h+key_l;
return keyval;
}
}return 0xff;
}
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