TMS320F28379D: I2C Open Drain / GPIO control

Mark Feller

Part Number: TMS320F28379D
Other Parts Discussed in Thread: SYSCONFIG

Tool/software:

I've read that for I2C, the open-drain configuration for the pin is enabled by setting GPxMUX to I2C for the pin.

I have an application that needs open-drain inputs/outputs, but where I need to manually control the pins. I cannot use the I2C module.

Is it possible to somehow configure the pins as open-drain, but use GPIODAT registers to set/read pin states?

Thanks,

8 months ago

+1 Aishwarya Rajesh 8 months ago

TI__Genius 17285 points

Mark,

The GPIOs themselves are push-pull, but they can be configured as open-drain and used to set/read pin states using GPIODAT using Driverlib / SysConfig for this device. Please refer to the SW examples in C2KWARE for implementation details as well as E2E threads on this forum for how others have done this in their application.

Please refer to the TMS320F2837xD Dual-Core Real-Time MCUs Silicon Errata as well for more information on the limitations of I2C open drain output buffer.

Best Regards,

Aishwarya

0 Aishwarya Rajesh 7 months ago

TI__Genius 17285 points

Mark,

Was this issue resolved and/or are there any other further questions? Please mark this thread as resolved, if the issue is resolved.

Best Regards,

Aishwarya

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TMS320F28379D: I2C Open Drain / GPIO control