s32k312 I2C Clock Source

[Hoon]

Hoon_0-1750297620843.png

[Robin_Shen]

Hi 

Please add Clock_Ip_ReferencePoints and configure AIPS_SLOW_CLK as the MODULE_CLK source of LPI2C.

Clock_Ip_ReferencePoints LPI2C AIPS_SLOW_CLK.png

Best Regards,
Robin
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[Hoon]

Hi  @Robin_Shen 

As your guide, I added Clock_Ip_ReferencePoints and set it to AIPS_SLOW_CLK. The problem is that Baud rage is out of spec and causes an error. My target is 400kHz.

Hoon_1-1750378063894.png

Hoon_3-1750378197654.png

[Robin_Shen]

Please change the value of LPI2C Master configurations by refer to CALCULATE S32K312 I2C BAUDRATE IN DETAIL.

[Hoon · Accepted solution]

I solved the I2C clock setting problem according to your guide

I have one problem. I'm trying to use the Lpi2c_Ip_MasterEndTransfer function, but I get the following compiler error as below 

"""  function "Lpi2c_Ip_MasterEndTransfer" declared implicitly """

There is no problem using the other functions below in the Lpi2c_Ip.c file. The same phenomenon occurs when the location of the function is moved to Lpi2c_Ip_MasterDeinit for fear that the Lpi2c_Ip_MasterEndTransfer function has been deactivated by the define process. Is there a related error?

no problem functions

Lpi2c_Ip_MasterDeinit
Lpi2c_Ip_MasterInit
Lpi2c_Ip_MasterSendDataBlocking
Lpi2c_Ip_MasterReceiveDataBlocking

[Robin_Shen]

Please ask another question in the community if you have any questions that are not related to the original topic of an existing case. It helps to keep it clear.

I will be on leave for a week and my colleague will answer your question.