[riot-notifications] [RIOT-OS/RIOT] drivers/periph_common: dac: add dac_play() (#13908)

[benpicco]

@benpicco commented on this pull request.



> +/**
+ * @brief   Play a buffer of (audio) samples on a DAC.
+ *
+ * @param[in] dac           The DAC to play the sample on
+ * @param[in] buf           A buffer with (audio) samples
+ * @param[in] params        Playback parameters
+ */
+void dac_play(dac_t dac, const void *buf, size_t len);

How about `dac_buffer_play()` / `dac_buffer_stop()`? 

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