40 lines
723 B
C
40 lines
723 B
C
#include "Key.h"
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unsigned char Key_Read() {
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unsigned char temp = 0;
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ET0 = 0;
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P44 = 0;
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P42 = 1;
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P35 = 1;
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P34 = 1;
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if (P33 == 0) temp = 4;
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if (P32 == 0) temp = 5;
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if (P31 == 0) temp = 6;
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if (P30 == 0) temp = 7;
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P44 = 1;
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P42 = 0;
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P35 = 1;
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P34 = 1;
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if (P33 == 0) temp = 8;
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if (P32 == 0) temp = 9;
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if (P31 == 0) temp = 10;
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if (P30 == 0) temp = 11;
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P44 = 1;
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P42 = 1;
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P35 = 0;
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P34 = 1;
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if (P33 == 0) temp = 12;
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if (P32 == 0) temp = 13;
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if (P31 == 0) temp = 14;
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if (P30 == 0) temp = 15;
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P44 = 1;
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P42 = 1;
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P35 = 1;
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P34 = 0;
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if (P33 == 0) temp = 16;
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if (P32 == 0) temp = 17;
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if (P31 == 0) temp = 18;
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if (P30 == 0) temp = 19;
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ET0 = 1;
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P3 = 0xff;
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return temp;
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} |