Created
March 27, 2015 15:10
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/* | |
Toda vez que pressionarmos o botão, o LED irá alternar-se. | |
*/ | |
//Interrupção Externa do pino INT0 | |
void interrupcaoExterna0() iv IVT_ADDR_INT0 | |
{ | |
PINB.B0 = 1; //alternamos o valor do pino PB0 | |
} | |
void main() | |
{ | |
//configuramos o pino do LED | |
DDRB.B0 = 1; //pino PB0 como saída | |
PORTB.B0 = 0; //pino PB0 inicialmente desligado | |
//configuramos o pino do botão | |
DDRD.B2 = 0; //pino INT0 como entrada | |
PORTD.B2 = 1; //habilitamo o resistor de pull-up do pino INT0 | |
//interrupção int0 por borda de descida | |
EICRA.ISC00 = 0; | |
EICRA.ISC01 = 1; | |
//habilitar a interrupção int0 | |
EIMSK.INT0 = 1; | |
//habilitar a interrupção global | |
SREG_I_bit = 1; | |
while(1) | |
{ | |
} | |
} |
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