Arduino push Button -

i need in arduino uno r3 push button. using registers without using pinmode, digitalwrite, digitalread if-else, , switch-case.

int led1=2, led2=3, led3=4, led4=5; int led5=8, led6=9, led7=10, led8=11; int button=12; int i,j,k;  void setup() {     ddrb=ddrb|b00001111;     ddrd=ddrd|b00111100;      serial.begin (9600); }  void loop() {     int f=0;     for(int s=0;s<16;s++){         int k=0;         int i=0b00001;         int j=0b0011;         portb=f;         f +=1;         if (f==64){f=0;}         portd=0;         for(k=0;k<7;k++){             delay(250);             portd=i;             delay(250);             portd=j;             i=(i<<1);             j=(j<<1);         }          j=(j>>1);         for(int d=0; d<9; d++){             delay(250);             portd=i;             delay(250);             portd=j;             i=(i>>1);             j=(j>>1);             }     } } 

this code. need make while loop push button. when push button program start , when push button again program stop.

well, can in 2 way.

first one

the simple 1 writing , reading byte directly into/fom eeprom. everytime press push button, need read first , validate value. lets supose byte means 0 turned off , 1 turned on. if push button , saved byte 0, need change 1.

you going write using this: https://www.arduino.cc/en/tutorial/eepromwrite

after management, need read byte inside loop statement. if byte 1, thread can executed.

you going read using this: https://www.arduino.cc/en/tutorial/eepromread

second

this cannon kill mosquito, can reused later manage other kinds of informations. going use same logic, saving more detailed or complex values. talking kind of database.

http://playground.arduino.cc/code/databaselibrary

i'm sorry can't write sample code right now. job first. if can't untill end of day, maybe can come later , comlete post out.