altos: Add fast-timer API. Use for quadrature and button drivers

This splits the fast-timer portion out of the debounce helper code and
shares that with the quadrature driver which now uses it directly.

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/src/stm/ao_fast_timer.h b/src/stm/ao_fast_timer.h
new file mode 100644
index 00000000..90fb3930
--- /dev/null
+++ b/src/stm/ao_fast_timer.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright © 2013 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_FAST_TIMER_H_
+#define _AO_FAST_TIMER_H_
+
+void
+ao_fast_timer_init(void);
+
+#ifndef AO_FAST_TIMER_MAX
+#define AO_FAST_TIMER_MAX	2
+#endif
+
+void
+ao_fast_timer_on(void (*callback)(void));
+
+void
+ao_fast_timer_off(void (*callback)(void));
+
+#endif /* _AO_FAST_TIMER_H_ */