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Add I2S support from Genuine MicroPython by Mike Teachman
Thanks, @miketeachman! See also micropython/micropython#4471
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‎esp32/application.mk

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@@ -133,6 +133,7 @@ APP_MODS_SRC_C = $(addprefix mods/,\
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pybflash.c \
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machspi.c \
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machine_i2c.c \
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machine_i2s.c \
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machpwm.c \
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machcan.c \
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modmachine.c \

‎esp32/hal/esp32_mphal.h

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@@ -30,4 +30,7 @@ void mp_hal_set_interrupt_char(int c);
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void mp_hal_set_reset_char(int c);
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void mp_hal_reset_safe_and_boot(bool reset);
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// I2S driver
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#define machine_pin_get_id(pin) pin_find(pin)->pin_number
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#endif // _INCLUDED_MPHAL_H_

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