12.按键控制LED的花样显示.zip

#include <reg51.h> #include <intrins.h> #define GPIO_KEY P1 //独立键盘用P1口 #define GPIO_LED P0 //led使用P0口 typedef unsigned char u8; typedef unsigned int u16; void Delay10ms(u16 c); //延时10ms u8 Key_Scan(); void LED1(); void LED2(); void LED3(); void LED4(); void LED5(); void LED6(); void LED7(); void LED8(); void main() { u8 keyNum; while (1) { keyNum = Key_Scan(); //扫描键盘 switch (keyNum) { case(0xFE) : //返回按键K1的数据 LED1(); break; case(0xFD) : //返回按键K2的数据 LED2(); break; case(0xFB) : //返回按键K3的数据 LED3(); break; case(0xF7) : //返回按键K4的数据 LED4(); break; case(0xEF) : //返回按键K5的数据 LED5(); break; case(0xDF) : //返回按键K6的数据 LED6(); break; case(0xBF) : //返回按键K7的数据 LED7(); break; case(0x7F) : //返回按键K8的数据 LED8(); break; default: break; } } } u8 Key_Scan() { u8 keyValue = 0 , i; //保存键值 //--检测按键1--// if (GPIO_KEY != 0xFF) //检测按键K1是否按下 { Delay10ms(1); //消除抖动 if (GPIO_KEY != 0xFF) //再次检测按键是否按下 { keyValue = GPIO_KEY; i = 0; while ((i<50) && (GPIO_KEY != 0xFF)) //检测按键是否松开 { Delay10ms(1); i++; } } } return keyValue; //将读取到键值的值返回 } void Delay10ms(unsigned int c) //误差 0us { unsigned char a, b; for (;c>0;c--) { for (b=38;b>0;b--) { for (a=130;a>0;a--); } } } void LED1() { unsigned char i; GPIO_LED = 0x01; for (i=0; i<16; i++) { GPIO_LED = _crol_(GPIO_LED, 1); Delay10ms(5); } } void LED2() { unsigned char i; GPIO_LED = 0x80; for (i=0; i<16; i++) { GPIO_LED = _cror_(GPIO_LED, 1); Delay10ms(5); } } void LED3() { GPIO_LED = 0xaa; Delay10ms(5); GPIO_LED = 0x55; Delay10ms(5); GPIO_LED = 0xaa; Delay10ms(5); GPIO_LED = 0x55; Delay10ms(5); } void LED4() { GPIO_LED = 0x55; Delay10ms(5); GPIO_LED = 0xaa; Delay10ms(5); GPIO_LED = 0x55; Delay10ms(5); GPIO_LED = 0xaa; Delay10ms(5); } void LED5() { GPIO_LED = 0xCC; Delay10ms(5); GPIO_LED = 0x33; Delay10ms(5); GPIO_LED = 0xCC; Delay10ms(5); GPIO_LED = 0x33; Delay10ms(5); } void LED6() { GPIO_LED = 0x33; Delay10ms(5); GPIO_LED = 0xCC; Delay10ms(5); GPIO_LED = 0x33; Delay10ms(5); GPIO_LED = 0xCC; Delay10ms(5); } void LED7() { LED1(); LED2(); LED3(); LED4(); LED5(); LED6(); } void LED8() { GPIO_LED = 0x00; }