Compiler/EK-TM4C123GXL: Multiple interrupts Enable in Same GPIO Port?

Rani Loganthan

Tool/software: TI C/C++ Compiler

HI ,

To calculate the RPM for 8 spindle working with TM4C123GXL controller. I have enabled PA5 as interrupt pin and find out the calculation . Next i need to use 8 pin as interrupt pin in same port (GPIO A), i would like to know this is possible in TM4C123GXL controller .

over 6 years ago

0 Genatco over 6 years ago

Guru 56198 points

Rani Loganthan said:
need to use 8 pin as interrupt pin in same port (GPIO A)

Perhaps you may use a SW triggered interrupt into pin 8 function via PA5 interrupt handler if pin 8 can not be assigned to individual INT sources.

HWREG(NVIC_SW_TRIG) = INT_GPIO_PORT_A - 16;

Input GPIO port A pin 8 values.....

0 Charles Tsai over 6 years ago

TI__Guru**** 191886 points

Hi,

All GPIO pins are interrupt capable. You can enable all 8 Port A pins to generate interrupt. Please note that there is only one interrupt vector for the Port A. Therefore, in your Port A interrupt handler you will need to create a switch statement to find out which of the 8 pins is pending to be serviced and decide your priority of servicing them.

0 Rani Loganthan over 6 years ago in reply to Charles Tsai

Intellectual 450 points

Thank you ...

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Compiler/EK-TM4C123GXL: Multiple interrupts Enable in Same GPIO Port?