a factor in lpi2c driver

[fuyunezu]

recently, i study the lpi2c driver of i.mxrt1170.

and i can't find the factor 0.52 in the driver software come from.

is anyone aware of it?

i.MX-RT1170 

[EdwinHz]

Hi @fuyunezu,

This 0.52 value comes from the tmpHigh function definition on line 713 of the "fsl_lpi2c.c" file:

I hope this helps.

BR,
Edwin.

[fuyunezu]

Hi EdwinHz,

Thanks to your reply.

I have noticed it, but it still can't explian this factor. I have looked up the "UM10204" which published by NXP, and I can't find any statement to explain the relationship between tbuf and scl clock cycle except the table which tell us the recommand value.