MCU-PLUS-SDK-AM263X: Peripheral access from multiple cores

Michael Nickelson

I see that LWIP examples provided in the SDK are using I2C1 to access an EEPROM. I'm trying to access I2C1 from another core on the chip but the system is locking up in 'Drivers_open()'.

Is it possible to access a single peripheral from multiple cores, or is this unsupported?

over 2 years ago

0 Frank Livingston over 2 years ago

TI__Mastermind 29348 points

Hi Michael,

Sorry for the delayed response. I'm looking into this issue and will get back with you shortly.

Regards,
Frank

0 Michael Nickelson over 2 years ago in reply to Frank Livingston

Prodigy 60 points

Hi Frank,

After posting I realized that in the final design we can/should probably use a different I2C bus from different cores and may just be running into a limitation of the dev board. But knowing if that's possible would still be nice.

Thanks,

Mike

0 Frank Livingston over 2 years ago in reply to Michael Nickelson

TI__Mastermind 29348 points

Hi Mike,

Thanks for the feedback. I'll continue checking into this.

Regards,
Frank

0 Aakash Kedia over 2 years ago in reply to Michael Nickelson

TI__Mastermind 26145 points

Hi Michael Nickelson,

The device does not support hardware semaphore but you can use IPC Notify between two cores to clear or set a Semaphore before using the resource (I2C).

Software handling is tricky here, as you might need to do the initialization from one of the cores and based on the semaphore settings, you need to use the bus form the respective core.

Best Regards,
Aakash

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MCU-PLUS-SDK-AM263X: Peripheral access from multiple cores