说明: #include #include #define uchar unsigned char #define uint unsigned int #define delaynop() {_nop_();_nop_();_nop_();_nop_();} sbit RS=P3^5; sbit RW=P3^6; sbit EN=P3^7; sbit spk=P2^7; uchar code keypad_chars[12][6]={"1 ","2abc","3def","4ghi","5jkl","
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