No sound from codec LINEOUT.

[CzyzyK]

Im using LPC55s36 and example i2s_dma_transfer. I changed pins neccesary, yet i hear no sound out of LINEOUT. How i can fix it or i got faulty board?

[Harry_Zhang]

Hi @CzyzyK 

You can observe the output effect through an oscilloscope.

According to the schematic, you can measure these three signals.

HangZhang_0-1725418210792.png

HangZhang_1-1725418354977.png

HangZhang_2-1725418408573.png

The above is the result of my test, you can refer to it.

BR

Hang