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

<hr>

<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/16217#discussion_r607888533">drivers/include/sm_pwm_01c.h</a>:</p>
<pre style='color:#555'>> +typedef struct {
+    uint16_t buf[SM_PWM_01C_BUFFER_LEN]; /**< circular buffer memory */
+    size_t head;                         /**< current buffer head */
+} circ_buf_t;
</pre>
<p>I didn't use it because the cib will note over-write the buffer content and here I do want to do so(I think since I made this choice a while ago :)).</p>

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