avr/avr_demo
avr/avr_demo
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This commit is contained in:
Mika Tuupola 2011-03-27 01:06:45 +02:00
parent e0ab879526
commit ebaf86a86c
1 changed files with 10 additions and 10 deletions
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20
digital_read/main.c
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@ -55,18 +55,18 @@ static int uart_getchar(FILE *stream) {
void init(void) { void init(void) {
/* Make PORTD3..7 PORTD0..1 (Arduino digital 3..9) input by clearing bits in DDR */ /* Make PORTD3..7 PORTD0..1 (Arduino digital 3..9) input by clearing bits in DDR */
DDRD &= ~(_BV(PORTD2) | _BV(PORTD3) | _BV(PORTD4) | _BV(PORTD5) | _BV(PORTD6) | _BV(PORTD7)); DDRD &= ~(_BV(PORTD2) | _BV(PORTD3) | _BV(PORTD4) | _BV(PORTD5) | _BV(PORTD6) | _BV(PORTD7));
DDRB &= ~(_BV(PORTB0) | _BV(PORTB1)); DDRB &= ~(_BV(PORTB0) | _BV(PORTB1));
/* Disable pullups by clearing bits in PORT. Default state is now low. */ /* Disable pullups by clearing bits in PORT. Default state is now low. */
/* /*
PORTD &= ~(_BV(PORTD3) | _BV(PORTD4) | _BV(PORTD5) | _BV(PORTD6) | _BV(PORTD7)); PORTD &= ~(_BV(PORTD3) | _BV(PORTD4) | _BV(PORTD5) | _BV(PORTD6) | _BV(PORTD7));
PORTB &= ~(_BV(PORTB0) | _BV(PORTB1)); PORTB &= ~(_BV(PORTB0) | _BV(PORTB1));
*/ */
/* Enable pullups by setting bits in PORT. Default state is now high. */ /* Enable pullups by setting bits in PORT. Default state is now high. */
PORTD |= (_BV(PORTD2) | _BV(PORTD3) | _BV(PORTD4) | _BV(PORTD5) | _BV(PORTD6) | _BV(PORTD7)); PORTD |= (_BV(PORTD2) | _BV(PORTD3) | _BV(PORTD4) | _BV(PORTD5) | _BV(PORTD6) | _BV(PORTD7));
PORTB |= (_BV(PORTB0) | _BV(PORTB1)); PORTB |= (_BV(PORTB0) | _BV(PORTB1));
/* Make PORTB5 (Arduino digital 13) an output by setting bit in DDR. */ /* Make PORTB5 (Arduino digital 13) an output by setting bit in DDR. */
DDRB |= _BV(PORTB5); DDRB |= _BV(PORTB5);