Why does it not work when uart uses DMA

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Why does it not work when uart uses DMA

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mgdsun2000
Contributor I

My project works normally under S32K312, and uart uses DMA to send and receive. However, when the project was migrated to S32K314, it was found that DMA could not work. Its configuration is consistent with S32K312. What are the differences in DMA configurations between the two chips?

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davidtosenovjan
NXP TechSupport
NXP TechSupport

You haven't described the issue but there are differences in  DMAMUX map.

davidtosenovjan_0-1671183918219.png

davidtosenovjan_1-1671183959898.png

 

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