PROCESSOR-SDK-J784S4: Access to WKUP I2C bus from CSL example app

Milena Milosevic

Part Number: PROCESSOR-SDK-J784S4
Other Parts Discussed in Thread: TPS389006, TMP112

Tool/software:

Dear TI,

We have issues accessing to the WKUP I2C bus from CSL example app.

We have application that can access MCU0 I2C bus, and rad from devices on this bus, but we have not managed to switch to the WKUP bus.

We have tried to set some of the variables in the default params in the board folder of pdk , so that the default bus is WKUP, but without success.

How do we change the domain for the I2C buses?

We are using Processor SDK RTOS J784S4 v10, and are performing boot via SBL.

Attached are our files for test app (Makefile and main).

We do have TMP112 temperature sensor on MCU I2C0 - which is always accessible, and TPS389006 on WKUP_I2C0.

/cfs-file/__key/communityserver-discussions-components-files/791/8176.main.c

/cfs-file/__key/communityserver-discussions-components-files/791/8176.Makefile.txt

Best regards,

Milena

7 months ago

0 Neehar Sawant 6 months ago

TI__Mastermind 19460 points

Hi Milena,

Responses will be delayed due to U.S. holiday, I will respond as soon as possible. Thanks for your patience!

Thanks,

Neehar

0 Neehar Sawant 6 months ago in reply to Neehar Sawant

TI__Mastermind 19460 points

Hi Milena,

Are you using a custom board or TI EVM?

We have an example within the RTOS PDK that uses WKUP I2C which you can use as reference. However, if you are using a custom board, you will have to make modifications based on the devices you have on the WKUP I2C bus.

Thanks,

Neehar

0 Milena Milosevic 6 months ago in reply to Neehar Sawant

Expert 1115 points

Hello Neehar,

We do have both ( custom and TI EVM) boards.

If you have example on TI EVM J784S4, that will be great. Can you send the path of example within the PSDK RTOS?

Regards,

Milena

+1 Neehar Sawant 6 months ago in reply to Milena Milosevic

TI__Mastermind 19460 points

Hi Milena,

Thanks for this information!

Take a look at the following example:

<PDK_PATH>/packages/ti/drv/i2c/test/i2c_extended_testapp/src/i2c_extended_testapp.c

Thanks,

Neehar

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PROCESSOR-SDK-J784S4: Access to WKUP I2C bus from CSL example app