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record and then playback works

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but the record during playback gives static
This commit is contained in:
Thomas Farstrike
2026-02-25 08:05:25 +01:00
parent 7628e9a6bc
commit 9f041f0108
1 changed files with 10 additions and 5 deletions
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tests/manual_test_duplex_audio.py
+10 -5
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@@ -32,10 +32,7 @@ class DuplexI2STest:
self._tx = None
self._rx = None
def _init_i2s(self):
if not _HAS_MACHINE:
raise RuntimeError("machine.I2S not available")
def _init_write(self):
self._tx = machine.I2S(
0,
sck=machine.Pin(I2S_PINS["sck"], machine.Pin.OUT),
@@ -48,6 +45,12 @@ class DuplexI2STest:
ibuf=8000,
)
def _init_i2s(self):
if not _HAS_MACHINE:
raise RuntimeError("machine.I2S not available")
# self._init_write()
self._rx = machine.I2S(
1,
sck=machine.Pin(I2S_PINS["sck_in"], machine.Pin.OUT),
@@ -78,7 +81,7 @@ class DuplexI2STest:
t_end = time.ticks_add(time.ticks_ms(), self.duration_ms)
while time.ticks_diff(t_end, time.ticks_ms()) > 0:
self._tx.write(tone)
#self._tx.write(tone)
read_len = self._rx.readinto(read_buf)
if read_len:
recorded.extend(read_buf[:read_len])
@@ -90,6 +93,8 @@ class DuplexI2STest:
playback = memoryview(recorded)
offset = 0
while offset < len(playback):
if not self._tx:
self._init_write()
offset += self._tx.write(playback[offset:])
finally:
self._deinit_i2s()