xiongyu faf898b659 bugfix(i2s): fix driver ut i2s ... * Add test support for ESP32S2 * Add loop back test * Support chip internal connection, no external wiring required. * Delete the relevant codes of PDM of ESP32-S2 ll layer. * fix dac dma mode issue		2020-03-03 11:58:53 +08:00
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driver	bugfix(i2s): fix driver ut i2s	2020-03-03 11:58:53 +08:00