External interrupt of TM4C123GH6PM launchpad.

Marlon Salmento

Other Parts Discussed in Thread: TM4C123GH6PM

I am using external interrupt of TM4C123GH6PM launchpad. I am using square wave to start the external interrupt in PIN PA2. If frequency of the square wave is 1 Hz the interrupt works well, but if I increase the frequency for 10 Hz or 100 Hz the interrupt no work. Which pin should I use to high frequency?

Thanks

over 8 years ago

0 Amit Ashara over 8 years ago

TI__Guru**** 244400 points

Hello Marlon

The pins are capable of faster interrupt processing that what is presented by 100 Hz. Can you please post the code you have for interrupt service routine?

0 cb1 over 8 years ago in reply to Amit Ashara

Guru 47900 points

Hi Amit,

As a (reasonable) guess - poster has placed "slow executing, UART commands" w/in his Interrupt Handler - which gives the impression of (slowed and/or lost interrupt.)

Should that not prove the case - poster may not have properly cleared the interrupt...

0 Amit Ashara over 8 years ago in reply to cb1

TI__Guru**** 244400 points

Hello cb1

Or put loops and/or UARTprints.

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External interrupt of TM4C123GH6PM launchpad.