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-rw-r--r--py/circuitpy_mpconfig.mk4
1 files changed, 4 insertions, 0 deletions
diff --git a/py/circuitpy_mpconfig.mk b/py/circuitpy_mpconfig.mk
index a01da2956..d0145a90f 100644
--- a/py/circuitpy_mpconfig.mk
+++ b/py/circuitpy_mpconfig.mk
@@ -55,6 +55,10 @@ CFLAGS += -DCIRCUITPY_AUDIOBUSIO=$(CIRCUITPY_AUDIOBUSIO)
CIRCUITPY_AUDIOBUSIO_I2SOUT ?= $(CIRCUITPY_AUDIOBUSIO)
CFLAGS += -DCIRCUITPY_AUDIOBUSIO_I2SOUT=$(CIRCUITPY_AUDIOBUSIO_I2SOUT)
+# Likewise, some boards have I2SOut but do not implement PDMIn.
+CIRCUITPY_AUDIOBUSIO_PDMIN ?= $(CIRCUITPY_AUDIOBUSIO)
+CFLAGS += -DCIRCUITPY_AUDIOBUSIO_PDMIN=$(CIRCUITPY_AUDIOBUSIO_PDMIN)
+
CIRCUITPY_AUDIOIO ?= $(CIRCUITPY_FULL_BUILD)
CFLAGS += -DCIRCUITPY_AUDIOIO=$(CIRCUITPY_AUDIOIO)