• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 31 subscribers
  • Views 144 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

MSPM0G3107: Can we configure a GPIO as a level trigger?

Robin Chiang
Prodigy 40 points
Part Number: MSPM0G3107
Other Parts Discussed in Thread: MSPM0L2228

Tool/software:

As stated in the title, we would like to configure a button as a level-trigger interrupt pin. Is this supported for the MSPM0G3107?

  • 0
    TI__Mastermind 39775 points

    What do you mean with level-trigger? A certain voltage?

  • 0 in reply to Eason Zhou
    Prodigy 40 points

    For example, in rtos/LP_MSPM0L2228/drivers/gpio_interrupt/gpiointerrupt.c 
    Line 68:
    GPIO_setConfig(CONFIG_GPIO_BUTTON_0, GPIO_CFG_IN_NOPULL |
    GPIO_CFG_IN_INT_RISING |
    CONFIG_GPIO_BUTTON_0_IOMUX);
     

    could we modify 'GPIO_CFG_IN_INT_RISING' to 'GPIO_CFG_IN_INT_LOW' ?

  • 0 in reply to Robin Chiang
    Guru 99655 points

    As far as I know you can't [Ref TRM (SLAU846A) Table 9-57]. You'll probably have to configure for Both edges and keep track of it in software.

    More generally: I'm having trouble imagining how you would use such a feature, since (one supposes) the NVIC interrupt would persist as long as the pin is low, and you wouldn't get anything else done.

    If your goal is to measure the low period, this is what Timer Capture was designed for.