Is it possible to use DMA for both I2C0 and I2C3 simultaneosly on Kinetis MK66?

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Is it possible to use DMA for both I2C0 and I2C3 simultaneosly on Kinetis MK66?

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mikebez
Contributor I

Hi :smileyhappy:

Screenshot from the Reference Manual (K66P144M180SF5RMV2, Rev. 3, 04/2017, page 474):

pastedImage_2.png

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jorge_a_vazquez
NXP Employee
NXP Employee

Hi mikebez 

If you are using I2C0 and I2C3 with DMA enabled, it could cause unpredictable behavior, because if a DMA request is triggered, you would not be able to know the true source of the DMA request (module 0 or 3). So, I wouldn't recommend enabling DMA support in both I2C modules.

Best regards

Jorge Alcala

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jorge_a_vazquez
NXP Employee
NXP Employee

Hi mikebez 

If you are using I2C0 and I2C3 with DMA enabled, it could cause unpredictable behavior, because if a DMA request is triggered, you would not be able to know the true source of the DMA request (module 0 or 3). So, I wouldn't recommend enabling DMA support in both I2C modules.

Best regards

Jorge Alcala

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