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| <h1 id="hal_cputime">hal_cputime</h1> |
| <p>The hardware independent interface to system time.</p> |
| <h3 id="description">Description</h3> |
| <p>Contains several different interface.</p> |
| <ul> |
| <li>An interface to get the current CPU time </li> |
| <li>Interfaces to convert between CPU time and clock time (microseconds etc.)</li> |
| <li>An Interface to set up a software timer based on CPU time.</li> |
| </ul> |
| <h3 id="definition">Definition</h3> |
| <p><a href="https://github.com/apache/incubator-mynewt-larva/blob/master/hw/hal/include/hal/hal_cputime.h">hal_cputime.h</a></p> |
| <h3 id="cpu-time">CPU Time</h3> |
| <p>The CPU time is not the same as the <a href="TBD">os_time</a>. Typically, |
| the os_time is set to a much slower tick rate than the CPU time. The CPU |
| time should be used for timing real-time events at exact times. The os_time |
| should be used for system level timeout etc that are not in fine time |
| resolutions. In fact, cputime is not part of the os at all, but a hardware |
| layer abstraction to high resolution timers. </p> |
| <p>There are methods to get the cputime as 32-bit and 64-bit values. Both |
| values may eventually wrap, but for timing short events a 32-bit value |
| may be sufficient and would </p> |
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