59 lines
1.2 KiB
C
59 lines
1.2 KiB
C
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#ifndef _key_H
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#define _key_H
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#include "public.h"
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//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƽ<EFBFBD>
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sbit KEY1=P3^1;
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sbit KEY2=P3^0;
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sbit KEY3=P3^2;
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sbit KEY4=P3^3;
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//ʹ<>ú궨<C3BA><EAB6A8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>µļ<C2B5>ֵ
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#define KEY1_PRESS 1
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#define KEY2_PRESS 2
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#define KEY3_PRESS 3
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#define KEY4_PRESS 4
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#define KEY_UNPRESS 0
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u8 key_scan(u8 mode);
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/*******************************************************************************
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* <EFBFBD><EFBFBD> <EFBFBD><EFBFBD> <EFBFBD><EFBFBD> : key_scan
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* <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> : <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>£<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ض<EFBFBD>Ӧ<EFBFBD><EFBFBD>ֵ
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* <EFBFBD><EFBFBD> <EFBFBD><EFBFBD> : mode=0<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɨ<EFBFBD>谴<EFBFBD><EFBFBD>
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mode=1<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɨ<EFBFBD>谴<EFBFBD><EFBFBD>
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* <EFBFBD><EFBFBD> <EFBFBD><EFBFBD> : KEY1_PRESS<EFBFBD><EFBFBD>K1<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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KEY2_PRESS<EFBFBD><EFBFBD>K2<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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KEY3_PRESS<EFBFBD><EFBFBD>K3<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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KEY4_PRESS<EFBFBD><EFBFBD>K4<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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KEY_UNPRESS<EFBFBD><EFBFBD>δ<EFBFBD>а<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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*******************************************************************************/
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u8 key_scan(u8 mode)
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{
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static u8 key=1;
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if(mode)key=1;//<2F><><EFBFBD><EFBFBD>ɨ<EFBFBD>谴<EFBFBD><E8B0B4>
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if(key==1&&(KEY1==0||KEY2==0||KEY3==0||KEY4==0))//<2F><><EFBFBD>ⰴ<EFBFBD><E2B0B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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{
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delay_10us(1000);//<2F><><EFBFBD><EFBFBD>
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key=0;
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if(KEY1==0)
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return KEY1_PRESS;
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else if(KEY2==0)
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return KEY2_PRESS;
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else if(KEY3==0)
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return KEY3_PRESS;
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else if(KEY4==0)
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return KEY4_PRESS;
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}
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else if(KEY1==1&&KEY2==1&&KEY3==1&&KEY4==1) //<2F>ް<EFBFBD><DEB0><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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{
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key=1;
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}
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return KEY_UNPRESS;
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}
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#endif
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