I2C master not working

[francescovico]

Hello ,

I'm trying to test I2C master on S32K324 but i'ts not working.

Actually I have no I2C slave connected to I2C master but I don't see any transition on PTD13 (LPI2C_SDA) or PTD14 (LPI2C_SCL), the two pins are ever HIGH.

I expect to see start condition like attached file.

Attached there is the project.

Regards, Francesco.

[danielmartynek]

Hello Francesco,

I haven't tested the code, but I see that you did not enable the LPI2C interrupt.

Add IntCtrl_Ip driver with LPI2C0_Master_Slave_IRQHandler.

And initialize the driver in the code.

Regards,

Daniel

[francescovico]

Hello Daniel,

Thank you, it's true I forgot to initialize interrupt.

Also with interrupt enabled the I2C it's not working.

Attached there is the project with interrupt enabled.

Do you have other suggestions?

Regards.

[danielmartynek]

Hi @francescovico,

When CM7_1 is halted, the MCU enters debug mode.
To ensure LPI2C continues functioning, either set the DBGEN bit in LPI2C_MCR to allow operation during debugging, or Keep CM7_1 running.

BR, Daniel

[francescovico]

Hello Daniel,

sorry but putting:

IP_LPI2C_0->MCR |= LPI2C_MCR_DBGEN_MASK;

The I2C still not working.

Attached my project.

Regards, Francesco.

[danielmartynek]

HI @francescovico,

Enable it after the Init function.

Otherwise, the Init function will clear the bit.

Regards,

Daniel

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