+++ /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;
-
-static __code struct {
- uint8_t mask;
- uint8_t reg;
-} ao_buttons[] = {
-#ifdef BUTTON_1_MASK
- { BUTTON_1_MASK, BUTTON_1_REG },
-#endif
-#ifdef BUTTON_2_MASK
- { BUTTON_2_MASK, BUTTON_2_REG },
-#endif
-#ifdef BUTTON_3_MASK
- { BUTTON_3_MASK, BUTTON_3_REG },
-#endif
-};
-
-#define NUM_BUTTONS ((sizeof ao_buttons) / sizeof (ao_buttons[0]))
-
-static void
-ao_button_insert(char n)
-{
- ao_fifo_insert(ao_button_fifo, n);
- ao_wakeup(&ao_button_fifo);
-}
-
-static void
-ao_button_isr(uint8_t flag, uint8_t reg)
-{
- uint8_t b;
-
- for (b = 0; b < NUM_BUTTONS; b++)
- if (ao_buttons[b].reg == reg && (ao_buttons[b].mask & flag))
- ao_button_insert(b + 1);
-}
-
-static uint8_t
-ao_button_mask(uint8_t reg)
-{
- uint8_t b;
- uint8_t mask = 0;
-
- for (b = 0; b < NUM_BUTTONS; b++)
- if (ao_buttons[b].reg == reg)
- mask |= ao_buttons[b].mask;
- return mask;
-}
-
-char
-ao_button_get(void) __critical
-{
- char b;
-
- while (ao_fifo_empty(ao_button_fifo))
- if (ao_sleep(&ao_button_fifo))
- return 0;
- ao_fifo_remove(ao_button_fifo, b);
- return b;
-}
-
-void
-ao_p0_isr(void) ao_arch_interrupt(13)
-{
- P0IF = 0;
- ao_button_isr(P0IFG, 0);
- P0IFG = 0;
-}
-
-void
-ao_p1_isr(void) ao_arch_interrupt(15)
-{
- P1IF = 0;
- ao_button_isr(P1IFG, 1);
- P1IFG = 0;
-}
-
-/* Shared with USB */
-void
-ao_p2_isr(void)
-{
- ao_button_isr(P2IFG, 2);
- P2IFG = 0;
-}
-
-void
-ao_button_init(void)
-{
- uint8_t mask;
-
- /* Pins are configured as inputs with pull-up by default */
-
- /* Enable interrupts for P0 inputs */
- mask = ao_button_mask(0);
- if (mask) {
- if (mask & 0x0f)
- PICTL |= PICTL_P0IENL;
- if (mask & 0xf0)
- PICTL |= PICTL_P0IENH;
- P0IFG = 0;
- P0IF = 0;
- IEN1 |= IEN1_P0IE;
- PICTL |= PICTL_P0ICON;
- }
-
- /* Enable interrupts for P1 inputs */
- mask = ao_button_mask(1);
- if (mask) {
- P1IEN |= mask;
- P1IFG = 0;
- P1IF = 0;
- IEN2 |= IEN2_P1IE;
- PICTL |= PICTL_P1ICON;
- }
-
- /* Enable interrupts for P2 inputs */
- mask = ao_button_mask(2);
- if (mask) {
- PICTL |= PICTL_P2IEN;
- P2IFG = 0;
- P2IF = 0;
- IEN2 |= IEN2_P2IE;
- PICTL |= PICTL_P2ICON;
- }
-}