57 lines
1.3 KiB
C
57 lines
1.3 KiB
C
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//GPIO- Input Configuration
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#include <avr/io.h>
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#define F_CPU 16000000//16MHz
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#include <util/delay.h>
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int main(void)
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{
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//pin 37-port C0 ; C7- pin 30
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DDRC = 0xff;//port C direction: output
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DDRA = 0xff;//port A direction: output
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DDRB = 0x00;//pin 10-13: Port B4 to B7 //direction: input
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//PINB = 0x00;//clearing PINB register
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//PORTA = PINB;
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//while(1);
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//enabling pull-up resistors//use=?//default output when pull-up enabled=high
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PORTB = 0xff;
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//PORTC = 0xff;
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//PORTB=0x00;//disabling pull-up resistors?//does it help or not?
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while(1)
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{
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PORTA = PINB;//PortA= pin 22-29
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if(PINB==0xFF)
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{
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PORTC = 0x01;
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_delay_ms(5);
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PORTC = 0x00;
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_delay_ms(5);
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}//f=100Hz
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else if(PINB==0x00)
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{
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PORTC = 0x01;
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_delay_ms(10);
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PORTC = 0x00;
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_delay_ms(10);
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}//f=50Hz
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/*else if(PINB==0x10)
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{
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PORTC = 0x01;
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_delay_ms(7);
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PORTC = 0x00;
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_delay_ms(7);
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}//f=approx 75Hz
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else if(PINB==0x20)
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{
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PORTC = 0x01;
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_delay_ms(20);
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PORTC = 0x00;
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_delay_ms(20);
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}//f=25Hz
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*/
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}
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}
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