*
* 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.
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
#include <ao.h>
#include <ao_button.h>
#include <ao_exti.h>
+#include <ao_fast_timer.h>
#if AO_EVENT
#include <ao_event.h>
#define ao_button_queue(b,v) ao_event_put_isr(AO_EVENT_BUTTON, b, v)
#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_BUTTON_DEBOUNCE_INTERVAL AO_MS_TO_TICKS(50)
-#define AO_DEBOUNCE AO_MS_TO_TICKS(20)
+struct ao_button_state {
+ AO_TICK_TYPE time;
+ uint8_t value;
+};
+
+static struct ao_button_state ao_button_state[AO_BUTTON_COUNT];
#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]);
- }
-}
+#ifndef AO_BUTTON_INVERTED
+#define AO_BUTTON_INVERTED 1
+#endif
-#define ao_button_update(b) ao_button_do(b, ao_gpio_get(port(b), bit(b), pin(b)))
+#if AO_BUTTON_INVERTED
+/* pins are inverted */
+#define ao_button_value(b) !ao_gpio_get(port(b), bit(b))
+#else
+#define ao_button_value(b) ao_gpio_get(port(b), bit(b))
+#endif
-static void
-ao_button_isr(void)
+static uint8_t
+_ao_button_get(uint8_t b)
{
+ switch (b) {
#if AO_BUTTON_COUNT > 0
- ao_button_update(0);
+ case 0: return ao_button_value(0);
#endif
#if AO_BUTTON_COUNT > 1
- ao_button_update(1);
+ case 1: return ao_button_value(1);
#endif
#if AO_BUTTON_COUNT > 2
- ao_button_update(2);
+ case 2: return ao_button_value(2);
#endif
#if AO_BUTTON_COUNT > 3
- ao_button_update(3);
+ case 3: return ao_button_value(3);
#endif
#if AO_BUTTON_COUNT > 4
- ao_button_update(4);
+ case 4: return ao_button_value(4);
+#endif
+#if AO_BUTTON_COUNT > 5
+ case 5: return ao_button_value(5);
+#endif
+#if AO_BUTTON_COUNT > 6
+ case 6: return ao_button_value(6);
+#endif
+#if AO_BUTTON_COUNT > 7
+ case 7: return ao_button_value(7);
+#endif
+#if AO_BUTTON_COUNT > 8
+ case 8: return ao_button_value(8);
+#endif
+#if AO_BUTTON_COUNT > 9
+ case 9: return ao_button_value(9);
+#endif
+#if AO_BUTTON_COUNT > 10
+ case 10: return ao_button_value(10);
#endif
+#if AO_BUTTON_COUNT > 11
+ case 11: return ao_button_value(11);
+#endif
+#if AO_BUTTON_COUNT > 12
+ case 12: return ao_button_value(12);
+#endif
+#if AO_BUTTON_COUNT > 13
+ case 13: return ao_button_value(13);
+#endif
+#if AO_BUTTON_COUNT > 14
+ case 14: return ao_button_value(14);
+#endif
+#if AO_BUTTON_COUNT > 15
+ case 15: return ao_button_value(15);
+#endif
+ }
+ return 0;
+}
+
+static void
+_ao_button_check(uint8_t b)
+{
+ uint8_t value = _ao_button_get(b);
+
+ if (value != ao_button_state[b].value) {
+ AO_TICK_TYPE now = ao_time();
+
+ if ((now - ao_button_state[b].time) >= AO_BUTTON_DEBOUNCE_INTERVAL) {
+ ao_button_state[b].value = value;
+ ao_button_queue(b, value);
+ }
+ ao_button_state[b].time = now;
+ }
+}
+
+static void
+_ao_button_init(uint8_t b)
+{
+ uint8_t m = ao_arch_irqsave();
+ uint8_t value = _ao_button_get(b);
+ ao_button_state[b].value = value;
+ ao_button_state[b].time = ao_time();
+ ao_button_queue(b, value);
+ ao_arch_irqrestore(m);
+
+}
+
+uint8_t
+ao_button_get(uint8_t b)
+{
+ return ao_button_state[b].value;
+}
+
+static void
+ao_button_isr(void)
+{
+ uint8_t b;
+
+ for (b = 0; b < AO_BUTTON_COUNT; b++)
+ _ao_button_check(b);
}
#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)); \
+ ao_enable_input(port(b), bit(b), AO_BUTTON_MODE); \
+ _ao_button_init(b); \
} while (0)
void
#if AO_BUTTON_COUNT > 1
init(1);
#endif
+#if AO_BUTTON_COUNT > 2
+ init(2);
+#endif
+#if AO_BUTTON_COUNT > 3
+ init(3);
+#endif
+#if AO_BUTTON_COUNT > 4
+ init(4);
+#endif
+#if AO_BUTTON_COUNT > 5
+ init(5);
+#endif
+#if AO_BUTTON_COUNT > 6
+ init(6);
+#endif
+#if AO_BUTTON_COUNT > 7
+ init(7);
+#endif
+#if AO_BUTTON_COUNT > 8
+ init(8);
+#endif
+#if AO_BUTTON_COUNT > 9
+ init(9);
+#endif
+#if AO_BUTTON_COUNT > 10
+ init(10);
+#endif
+#if AO_BUTTON_COUNT > 11
+ init(11);
+#endif
+#if AO_BUTTON_COUNT > 12
+ init(12);
+#endif
+#if AO_BUTTON_COUNT > 13
+ init(13);
+#endif
+#if AO_BUTTON_COUNT > 14
+ init(14);
+#endif
+#if AO_BUTTON_COUNT > 15
+ init(15);
+#endif
+#if AO_BUTTON_COUNT > 16
+ #error too many buttons
+#endif
+ ao_fast_timer_init();
+ ao_fast_timer_on(ao_button_isr);
}
projects / fw / altos / blobdiff