Initial commit

util/time.h

@@ -0,0 +1,34 @@
+#ifndef UTIL_TIME_H
+#define UTIL_TIME_H
+
+#include "device.h"
+
+#define DIV_ROUND(dividend, divisor)  (((dividend) + (divisor) / 2) / (divisor))
+#define CLOCK_TICKS_PER_SEC CONFIG_AFSK_DAC_SAMPLERATE
+
+typedef int32_t ticks_t;
+typedef int32_t mtime_t;
+
+volatile ticks_t _clock;
+
+inline ticks_t timer_clock(void) {
+    ticks_t result;
+
+    ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
+        result = _clock;
+    }
+
+    return result;
+}
+
+
+inline ticks_t ms_to_ticks(mtime_t ms) {
+    return ms * DIV_ROUND(CLOCK_TICKS_PER_SEC, 1000);
+}
+
+inline void cpu_relax(void) {
+    // Do nothing!
+}
+
+
+#endif