+++ /dev/null
-/*
- * Copyright © 2011 Keith Packard <keithp@keithp.com>
- *
- * 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 "ao.h"
-
-volatile __xdata struct ao_fifo ao_button_fifo;
-
-#define BUTTON_1_PIN (P0_4)
-#define BUTTON_1_MASK (1 << 4) /* P0_4 */
-
-#define BUTTON_2_PIN (P2_3)
-#define BUTTON_2_MASK (1 << 3) /* P2_3 */
-
-#define BUTTON_3_PIN (P2_4)
-#define BUTTON_3_MASK (1 << 4) /* P2_4 */
-
-static void
-ao_button_insert(char n)
-{
- ao_fifo_insert(ao_button_fifo, n);
- ao_wakeup(&ao_button_fifo);
-}
-
-char
-ao_button_get(void) __critical
-{
- char b;
-
- while (ao_fifo_empty(ao_button_fifo))
- ao_sleep(&ao_button_fifo);
- ao_fifo_remove(ao_button_fifo, b);
- return b;
-}
-
-void
-ao_p2_isr(void)
-{
- if (P2IFG & BUTTON_2_MASK)
- ao_button_insert(2);
- if (P2IFG & BUTTON_3_MASK)
- ao_button_insert(3);
- P2IFG = 0;
-}
-
-void
-ao_p0_isr(void) ao_arch_interrupt(13)
-{
- P0IF = 0;
- if (P0IFG & BUTTON_1_MASK)
- ao_button_insert(1);
- P0IFG = 0;
-}
-
-void
-ao_button_init(void)
-{
- /* Pins are configured as inputs with pull-up by default */
-
- /* Enable interrupts for P2_0 - P2_4
- * Enable interrupts for P0_4 - P0_7
- * Set P2 interrupts to falling edge
- * Set P0 interrupts to falling edge
- */
-
- /* Enable interrupts for P0 inputs */
- IEN1 |= IEN1_P0IE;
-
- /* Enable interrupts for P2 inputs */
- IEN2 |= IEN2_P2IE;
-
- PICTL |= PICTL_P2IEN | PICTL_P0IENH | PICTL_P2ICON | PICTL_P0ICON;
-}