I2S secondary channel support

[PatrickLai]

Hi,

I'm using I2S to receive 6 channel audio data on LPC55S28. After setting FSL_FEATURE_I2S_SUPPORT_SECONDARY_CHANNEL to 1, I got the compile error: "drivers/fsl_i2s.h:424:9: error: 'I2S_Type' has no member named 'SECCHANNEL'". The SDK version is MCUXpressoIDE_24.12.148. Please help to check if it supports the I2S secondary channel feature or how to support it.

Best regards,

Patrick

[Alice_Yang]

Hello @PatrickLai 

The LPC55S28 does not support the I2S Secondary Channel (SECCHANNEL) feature.
There is no SECCHANNEL register in the LPC55S28 I2S peripheral module.
If you need to use multiple I2S  channels on the LPC55S28, please use multiple I2S modules combined with TDM mode.
For details, please refer to Section 35.6.1 — I2S Signal Sharing in the LPC55S28 User Manual.

Hope it helps. 

Thank you.

BR

Alice

[PatrickLai]

Hi Alice,

Thank you for your reply. Could you please also guide me how to find the lpc55s28 user manual? The one I found in the community seems not containing "Section 35.6.1 — I2S Signal Sharing".

Best regards,

Patrick

[Alice_Yang · Accepted solution]

Hello @PatrickLai 

Please download the LPC55S28 User Manual from: https://www.nxp.com/webapp/Download?colCode=UM11126 
You can find all materials related to NXP products on the NXP website: https://www.nxp.com/ 

If you cannot find the information you need, please feel free to contact us without any hesitate. 

Thank you.

BR

Alice