RTOS/CC2650: Setting Threshold Voltage for Negative and Positive Edge Interrupt

bluto

Part Number: CC2650

Tool/software: TI-RTOS

Hi,

I am using callback function generated by interrupt. I am able to configure DIO as Input and enabled interrupt on that successfully.

INPUT1 | PIN_INPUT_EN | PIN_NOPULL | PIN_IRQ_BOTHEDGES,

Here I am configuring IO to generate interrupt on both rising and falling edge. My issue is source of interrupt is noisy, there is voltage fluctuation of around 400 mV both at high state and low state. Fluctuation at high state is not issue, because its at 3.8 V level. However at low state it generates interrupt multiple times. Is there a way to set threshold voltage for rising as well as falling edge interrupt? Can we configure registers so that interrupt is generated only when voltage falls below threshold voltage.

Thanks

over 5 years ago

0 AB over 5 years ago

TI__Mastermind 19135 points

Hello,

Try adding Hysteresis(PIN_HYSTERESIS) to the PIN, this should help.

Regards,
AB

0 bluto over 5 years ago in reply to AB

Expert 1450 points

How would Hyteresis would help here? Won't it just delay noise rather than suppressing it?

0 bluto over 5 years ago in reply to AB

Expert 1450 points

I Tried this but it did not resolve my issue.

0 AB over 5 years ago in reply to bluto

TI__Mastermind 19135 points

Hello,

Is this application being developed on our launchpads? Is this a custom board, if it is can you share schematics of that portion?

Regards,
AB

0 AB over 5 years ago in reply to AB

TI__Mastermind 19135 points

Hello,

Any updates on this?

Regards,
AB

0 bluto over 5 years ago in reply to AB

Expert 1450 points

Hi,

It was hardware issue? One component was generating noise and that was creating interrupt. Have sorted this out.

Thanks for help.

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RTOS/CC2650: Setting Threshold Voltage for Negative and Positive Edge Interrupt