I am having difficulties activating the EXTI interrupt for a pin in the M4 NVIC.
What I did:
- Opened STM32CubeMX,
- selected the board STM32MP157F-DK2,
- opted to configure all peripherals in their default state
- Activate SPI5 in the M4 domain, incl. DMA domain
- Select PF3 pin EXTI mode with falling edge trigger detection (in my application serves as a data ready signal that should start the SPI transfer)
- Now trying to activate EXTI Line 3 interrupt in NVIC, but the check-box is greyed out & I have no clue what I am missing to let me activate the EXTI line 3 interrupt
Does anyone know what I missed? Attached is the ioc file generated so far.
Thank you all so much for any help!
