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Just for info.
The same I2S based sketch on RP2350 was compiled on two PCs with the absolutely identical IDE environments.
Initially GPIO22 was chosen as data out for PCM1502 DAC.
On the second PC there was no data out signal at all.
I spent half a day trying all that came in mind with no result.
Problem function was i2s.write(buffer, count).
Finaly, just for fun I changed to GPIO28 and all became fine.
DeepSeek took part in all my troubles in parallel, but could not suggest solution and description.
PS
I want to point out that the problem GPIO22 was not damaged.
It works fine in I2SLoopback_Buffer example on the second PC.
This discussion was converted from issue #3465 on July 04, 2026 16:50.
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Just for info.
The same I2S based sketch on RP2350 was compiled on two PCs with the absolutely identical IDE environments.
Initially GPIO22 was chosen as data out for PCM1502 DAC.
On the second PC there was no data out signal at all.
I spent half a day trying all that came in mind with no result.
Problem function was i2s.write(buffer, count).
Finaly, just for fun I changed to GPIO28 and all became fine.
DeepSeek took part in all my troubles in parallel, but could not suggest solution and description.
PS
I want to point out that the problem GPIO22 was not damaged.
It works fine in I2SLoopback_Buffer example on the second PC.
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