1、9数码管显示44键盘矩阵按键#include #define uchar unsigned char#define uint unsigned intsbit BEEP = P37;uchar code DSY_CODE= 0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0x00;uchar Pre_KeyNO = 16,KeyNO = 16;void DelayMS(uint ms) uchar t;while(ms-) for(t=0;t 4 0x0f;switch(Tmp) c
2、ase 1: KeyNO += 0; break;case 2: KeyNO += 4; break;case 4: KeyNO += 8; break;case 8: KeyNO += 12;void Beep() uchar i;for(i=0;i100;i+) DelayMS(1);BEEP = BEEP;BEEP = 1;void main() P0 = 0x00;while(1) P1 = 0xf0;if(P1 != 0xf0)Keys_Scan();if(Pre_KeyNO != KeyNO) P0 = DSY_CODEKeyNO;Beep();Pre_KeyNO = KeyNO;DelayMS(100);
