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-rw-r--r--tmk_core/common/timer.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/tmk_core/common/timer.h b/tmk_core/common/timer.h
index abddcea857..02e39e79e7 100644
--- a/tmk_core/common/timer.h
+++ b/tmk_core/common/timer.h
@@ -1,5 +1,6 @@
/*
Copyright 2011 Jun Wako <wakojun@gmail.com>
+Copyright 2021 Simon Arlott
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
@@ -17,6 +18,10 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#pragma once
+#if __has_include_next("_timer.h")
+# include_next "_timer.h" /* Include the platform's _timer.h */
+#endif
+
#include <stdint.h>
#define TIMER_DIFF(a, b, max) ((max == UINT8_MAX) ? ((uint8_t)((a) - (b))) : ((max == UINT16_MAX) ? ((uint16_t)((a) - (b))) : ((max == UINT32_MAX) ? ((uint32_t)((a) - (b))) : ((a) >= (b) ? (a) - (b) : (max) + 1 - (b) + (a)))))
@@ -42,6 +47,21 @@ uint32_t timer_elapsed32(uint32_t last);
#define timer_expired(current, future) ((uint16_t)(current - future) < UINT16_MAX / 2)
#define timer_expired32(current, future) ((uint32_t)(current - future) < UINT32_MAX / 2)
+// Use an appropriate timer integer size based on architecture (16-bit will overflow sooner)
+#if FAST_TIMER_T_SIZE < 32
+# define TIMER_DIFF_FAST(a, b) TIMER_DIFF_16(a, b)
+# define timer_expired_fast(current, future) timer_expired(current, future)
+typedef uint16_t fast_timer_t;
+fast_timer_t inline timer_read_fast(void) { return timer_read(); }
+fast_timer_t inline timer_elapsed_fast(fast_timer_t last) { return timer_elapsed(last); }
+#else
+# define TIMER_DIFF_FAST(a, b) TIMER_DIFF_32(a, b)
+# define timer_expired_fast(current, future) timer_expired32(current, future)
+typedef uint32_t fast_timer_t;
+fast_timer_t inline timer_read_fast(void) { return timer_read32(); }
+fast_timer_t inline timer_elapsed_fast(fast_timer_t last) { return timer_elapsed32(last); }
+#endif
+
#ifdef __cplusplus
}
#endif