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#include REGX52.H
#include Delay.h/*** brief 矩阵键盘读取按键键码* param 无* retval KeyNumber 按下按键的键码值如果按键按下不放#xff0c;程序会停留在此函数#xff0c;松手的一瞬间#xff0c;返回按键键码#xff0c;没有按键…按列扫描
#include REGX52.H
#include Delay.h/*** brief 矩阵键盘读取按键键码* param 无* retval KeyNumber 按下按键的键码值如果按键按下不放程序会停留在此函数松手的一瞬间返回按键键码没有按键按下时返回0*/
unsigned char MatrixKey()
{unsigned char KeyNumber0;P10xFF;P1_30;if(P1_70){Delay(20);while(P1_70);Delay(20);KeyNumber1;}if(P1_60){Delay(20);while(P1_60);Delay(20);KeyNumber5;}if(P1_50){Delay(20);while(P1_50);Delay(20);KeyNumber9;}if(P1_40){Delay(20);while(P1_40);Delay(20);KeyNumber13;}P10xFF;P1_20;if(P1_70){Delay(20);while(P1_70);Delay(20);KeyNumber2;}if(P1_60){Delay(20);while(P1_60);Delay(20);KeyNumber6;}if(P1_50){Delay(20);while(P1_50);Delay(20);KeyNumber10;}if(P1_40){Delay(20);while(P1_40);Delay(20);KeyNumber14;}P10xFF;P1_10;if(P1_70){Delay(20);while(P1_70);Delay(20);KeyNumber3;}if(P1_60){Delay(20);while(P1_60);Delay(20);KeyNumber7;}if(P1_50){Delay(20);while(P1_50);Delay(20);KeyNumber11;}if(P1_40){Delay(20);while(P1_40);Delay(20);KeyNumber15;}P10xFF;P1_00;if(P1_70){Delay(20);while(P1_70);Delay(20);KeyNumber4;}if(P1_60){Delay(20);while(P1_60);Delay(20);KeyNumber8;}if(P1_50){Delay(20);while(P1_50);Delay(20);KeyNumber12;}if(P1_40){Delay(20);while(P1_40);Delay(20);KeyNumber16;}return KeyNumber;
}
应用
#include REGX52.H
#include LCD1602.h
#include Delay.h
#include MatrixKey.hunsigned char KeyNum;void main(){LCD_Init();LCD_ShowString(1,1,hello world! );while(1){KeyNumMatrixKey();if(KeyNum){LCD_ShowNum(2,1,KeyNum,2);}}}
