diff options
| -rw-r--r-- | src/drivers/ao_button.c | 94 | ||||
| -rw-r--r-- | src/drivers/ao_button.h | 24 | ||||
| -rw-r--r-- | src/drivers/ao_event.c | 77 | ||||
| -rw-r--r-- | src/drivers/ao_event.h | 41 |
4 files changed, 236 insertions, 0 deletions
diff --git a/src/drivers/ao_button.c b/src/drivers/ao_button.c new file mode 100644 index 00000000..a507c909 --- /dev/null +++ b/src/drivers/ao_button.c @@ -0,0 +1,94 @@ +/* + * Copyright © 2012 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> +#include <ao_button.h> +#include <ao_exti.h> +#if AO_EVENT +#include <ao_event.h> +#define ao_button_queue(b,v) ao_event_put_isr(AO_EVENT_BUTTON, b, v) +#else +#define ao_button_queue(b,v) +#endif + +static uint8_t ao_button[AO_BUTTON_COUNT]; +static AO_TICK_TYPE ao_button_time[AO_BUTTON_COUNT]; + +#define AO_DEBOUNCE AO_MS_TO_TICKS(20) + +#define port(q) AO_BUTTON_ ## q ## _PORT +#define bit(q) AO_BUTTON_ ## q +#define pin(q) AO_BUTTON_ ## q ## _PIN + +static void +ao_button_do(uint8_t b, uint8_t v) +{ + /* Debounce */ + if ((AO_TICK_SIGNED) (ao_tick_count - ao_button_time[b]) < AO_DEBOUNCE) + return; + + /* pins are inverted */ + v = !v; + if (ao_button[b] != v) { + ao_button[b] = v; + ao_button_time[b] = ao_tick_count; + ao_button_queue(b, v); + ao_wakeup(&ao_button[b]); + } +} + +#define ao_button_update(b) ao_button_do(b, ao_gpio_get(port(b), bit(b), pin(b))) + +static void +ao_button_isr(void) +{ +#if AO_BUTTON_COUNT > 0 + ao_button_update(0); +#endif +#if AO_BUTTON_COUNT > 1 + ao_button_update(1); +#endif +#if AO_BUTTON_COUNT > 2 + ao_button_update(2); +#endif +#if AO_BUTTON_COUNT > 3 + ao_button_update(3); +#endif +#if AO_BUTTON_COUNT > 4 + ao_button_update(4); +#endif +} + +#define init(b) do { \ + ao_enable_port(port(b)); \ + \ + ao_exti_setup(port(b), bit(b), \ + AO_BUTTON_MODE|AO_EXTI_MODE_FALLING|AO_EXTI_MODE_RISING|AO_EXTI_PRIORITY_MED, \ + ao_button_isr); \ + ao_exti_enable(port(b), bit(b)); \ + } while (0) + +void +ao_button_init(void) +{ +#if AO_BUTTON_COUNT > 0 + init(0); +#endif +#if AO_BUTTON_COUNT > 1 + init(1); +#endif +} diff --git a/src/drivers/ao_button.h b/src/drivers/ao_button.h new file mode 100644 index 00000000..ce349d65 --- /dev/null +++ b/src/drivers/ao_button.h @@ -0,0 +1,24 @@ +/* + * Copyright © 2012 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. + */ + +#ifndef _AO_BUTTON_H_ +#define _AO_BUTTON_H_ + +void +ao_button_init(void); + +#endif /* _AO_BUTTON_H_ */ diff --git a/src/drivers/ao_event.c b/src/drivers/ao_event.c new file mode 100644 index 00000000..440ef2de --- /dev/null +++ b/src/drivers/ao_event.c @@ -0,0 +1,77 @@ +/* + * Copyright © 2012 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> +#include <ao_event.h> + +#define AO_EVENT_QUEUE 64 + +#define ao_event_queue_next(n) (((n) + 1) & (AO_EVENT_QUEUE - 1)) +#define ao_event_queue_prev(n) (((n) - 1) & (AO_EVENT_QUEUE - 1)) +#define ao_event_queue_empty() (ao_event_queue_insert == ao_event_queue_remove) +#define ao_event_queue_full() (ao_event_queue_next(ao_event_queue_insert) == ao_event_queue_remove) + +/* + * Whether a sequence of events from the same device should be collapsed + */ +#define ao_event_can_collapse(type) ((type) == AO_EVENT_QUADRATURE) + +struct ao_event ao_event_queue[AO_EVENT_QUEUE]; +uint8_t ao_event_queue_insert; +uint8_t ao_event_queue_remove; + + +uint8_t +ao_event_get(struct ao_event *ev) +{ + ao_arch_critical( + while (ao_event_queue_empty()) + ao_sleep(&ao_event_queue); + *ev = ao_event_queue[ao_event_queue_remove]; + ao_event_queue_remove = ao_event_queue_next(ao_event_queue_remove); + ); +} + +/* called with interrupts disabled */ +void +ao_event_put_isr(uint8_t type, uint8_t unit, uint32_t value) +{ + if (!ao_event_queue_full()) { + + if (ao_event_can_collapse(type) && !ao_event_queue_empty()) { + uint8_t prev = ao_event_queue_prev(ao_event_queue_insert); + + if (ao_event_queue[prev].type == type && + ao_event_queue[prev].unit == unit) + ao_event_queue_insert = prev; + } + ao_event_queue[ao_event_queue_insert] = (struct ao_event) { + .type = type, + .unit = unit, + .tick = ao_tick_count, + .value = value + }; + ao_event_queue_insert = ao_event_queue_next(ao_event_queue_insert); + ao_wakeup(&ao_event_queue); + } +} + +void +ao_event_put(uint8_t type, uint8_t unit, uint32_t value) +{ + ao_arch_critical(ao_event_put_isr(type, unit, value);); +} diff --git a/src/drivers/ao_event.h b/src/drivers/ao_event.h new file mode 100644 index 00000000..25c49c35 --- /dev/null +++ b/src/drivers/ao_event.h @@ -0,0 +1,41 @@ +/* + * Copyright © 2012 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. + */ + +#ifndef _AO_EVENT_H_ +#define _AO_EVENT_H_ + +#define AO_EVENT_NONE 0 +#define AO_EVENT_QUADRATURE 1 +#define AO_EVENT_BUTTON 2 + +struct ao_event { + uint8_t type; + uint8_t unit; + uint16_t tick; + uint32_t value; +}; + +uint8_t +ao_event_get(struct ao_event *ev); + +void +ao_event_put_isr(uint8_t type, uint8_t unit, uint32_t value); + +void +ao_event_put(uint8_t type, uint8_t unit, uint32_t value); + +#endif /* _AO_EVENT_H_ */ |