imx8mp i2c data transfer is slow

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imx8mp i2c data transfer is slow

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tamo2
Contributor II

Hi,

We are developing a product based on imx8mp processor.  It loads a program to a Lattice CrossLink FPGA via i2c bus.  The FPGA binary data size (.ied file) is 149KB and it takes about ~8.3 sec with 400 KHz i2c clock.  The loading program uses i2c's Block read/write mode.

Our existing product uses Snapdragon 820 processor, and it uses the same FPGA and loading the same binary data takes ~5.2 sec via i2c with 400 KHz clock.  

Is there anything we can do to speed up the i2c data transfer?  We used yocto/hardnott and also kirkstone, and both were slow.  d

Thanks,
tamo2

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Zhiming_Liu
NXP TechSupport
NXP TechSupport

This is an errata of i2c spec on i.MX8MP:

Qmiller_0-1684123369013.png

 

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Zhiming_Liu
NXP TechSupport
NXP TechSupport

This is an errata of i2c spec on i.MX8MP:

Qmiller_0-1684123369013.png

 

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