failed approach

gomspace/libutil/include/gs/util/delay.h

@@ -0,0 +1,42 @@
+#ifndef GS_UTIL_DELAY_H
+#define GS_UTIL_DELAY_H
+/* Copyright (c) 2013-2018 GomSpace A/S. All rights reserved. */
+/**
+   @file
+
+   Delay execution.
+
+   @note Most implementations uses busy waiting.
+*/
+
+#include <gs/util/types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+   Delay for number of microseconds.
+   @note Linux doesn't busy wait.
+   @param us Number of microseconds to wait
+*/
+void gs_delay_us(uint32_t us);
+
+/**
+   Return current counter used for us delays
+   @return timestamp in us
+*/
+uint16_t gs_delay_ts_get(void);
+
+/**
+   Wait until delay has passed since timestamp
+
+   @param[in] ts Timestamp in us
+   @param[in] delay The requested delay since ts
+*/
+void gs_delay_from_ts(uint16_t ts, uint16_t delay);
+
+#ifdef __cplusplus
+}
+#endif
+#endif