<p><b>@gosticks</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/11866#discussion_r308261339">cpu/cc3200/include/cc3200_prcm.h</a>:</p>
<pre style='color:#555'>> +
+#ifndef CC3200_PRCM_H
+#define CC3200_PRCM_H
+
+#include "cc3200.h"
+#include "vendor/hw_memmap.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief convert x usecs to cpu cycles
+ *
+ */
+#define USEC_TO_CPU_CYCLES(x) (80 * x) / 3
</pre>
<p>I could replace (80 * x)  with ((CLOCK_CORECLOCK / 1000000) * x) but importorting <code>periph_conf.h</code> causes some import/definition order troubles for me</p>

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