From 64500ab11ab76d2309608f8e02a1dd9658963b3e Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Fri, 12 Oct 2012 14:04:57 -0700 Subject: altos: Add attiny architecture files These are designed to work with the ATtiny85 processor, but can presuambly be easily adapted to others in that series Signed-off-by: Keith Packard --- src/attiny/ao_exti.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 src/attiny/ao_exti.c (limited to 'src/attiny/ao_exti.c') diff --git a/src/attiny/ao_exti.c b/src/attiny/ao_exti.c new file mode 100644 index 00000000..0ca10ca4 --- /dev/null +++ b/src/attiny/ao_exti.c @@ -0,0 +1,37 @@ +/* + * Copyright © 2012 Keith Packard + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + */ + +#include +#include + +static void (*pcint_callback)(void); +static uint8_t pcint_mask; + +ISR(PCINT0_vect) +{ + if (PINB & pcint_mask) + (*pcint_callback)(); +} + +void +ao_exti_setup_port(uint8_t pin, uint8_t mode, void (*callback)(void)) +{ + pcint_callback = callback; + pcint_mask = (1 << pin); + ao_exti_disable(PORTB, pin); + GIMSK |= (1 << PCIE); +} -- cgit v1.2.3