Wangjialin 1f055d28b8 Driver update: I2S pdm and built-in DAC ... 1. Modify I2S DAC built-in mode settings 2. Add I2S pdm mode 3. Correct I2S signal index in full-duplex mode 4. Modify dac output function 5. Add dac pad init functions 6. Modify DAC documentation 7. Add i2s_set_dac_mode API		2017-05-12 16:21:02 +08:00
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driver	Driver update: I2S pdm and built-in DAC	2017-05-12 16:21:02 +08:00