51 microcontroller learning-button control LED-EEWORLD

Collect

1. Press the button once and the LED light will flash once.

#include

void Delay(unsigned int xms) //@12.000MHz

{

unsigned char i, j;

while(xms)

{

i = 2;

j = 239;

{

while (--j);

} while (--i);

xms--;

}

void main()

{

//P2=0xFE;

while(1)

{if(P3_1==0)

{

Delay(20);

while(P3_1==0);

Delay(20);

P2_0=~P2_0;

}

Press once to change once

2. Press the button once and the LED will shift once.

#include

void Delay(unsigned int xms) //@12.000MHz

{

unsigned char i, j;

while(xms--)

{

i = 2;

j = 239;

{

while (--j);

} while (--i);

}

void main()

{

unsigned char i=0;

P2=~0x01;

while(1)

{

if(P3_1==0)

{

Delay(20);

while(P3_1==0);

Delay(20);

i++;

if(i>=8)

i=0;

P2=~(0x01< /*i++;

P2=~i;*/

}

if(P3_0==0)

{

Delay(20);

while(P3_0==0);

Delay(20);

if(i==0)

i=7;

else

i--;

P2=~(0x01< /*i++;

P2=~i;*/

}

Press once to shift once

Reference address：51 microcontroller learning-button control LED

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