diff options
| author | Bdale Garbee <bdale@gag.com> | 2012-09-12 20:01:22 -0600 |
|---|---|---|
| committer | Bdale Garbee <bdale@gag.com> | 2012-09-12 20:01:22 -0600 |
| commit | 3b612efcd1dddc6a3d59012f7ed57754b1f798c2 (patch) | |
| tree | 18d50713491ef96c5c127a309f870efb6c33f98d /src/drivers/ao_button.c | |
| parent | e076773c1693e2a62bb828dee71c04c20dbab0a5 (diff) | |
| parent | 01eb36408d7e0e826b431fcc1d3b2deb23607e0b (diff) | |
Merge branch 'new-debian' into debian
Conflicts:
ChangeLog
debian/altos.install
debian/changelog
debian/control
debian/copyright
debian/dirs
debian/docs
debian/menu
debian/rules
src/Makefile
Diffstat (limited to 'src/drivers/ao_button.c')
| -rw-r--r-- | src/drivers/ao_button.c | 94 |
1 files changed, 94 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 +} |