![]() Then I read the flag recorder to see if there was or not the interrupt and clean this recorder! I do not know if it is resolved or if it is possible.īut I would use this knowledge you posted here. (function that will be called when the interruption occurs) Hello all, I tried searching for a bit but couldn't find anything pertaining to my question.I'm trying to set up an external interrupt but I don't understand why exactly we clear the pending bit in EXTI->PR and not in the NVICICPRx (interrupt clear pending registers). So I plan to enable an external interrupt without an ISR. STM32f4 Discovery EXTI Clear pending bit. I still have not figured out the reason, but I suspect the interrupt is changing the value of the variable at the same time of some operation with it! it ends up crashing. I use it to read pulses with a frequency of max 50hzīut with much less than that, the esp locks and resets! Section 2.2. It causes bug in my code and I do not know why! So before I attach interrupts, I clear pending interrupts by clearing the EIFR which is an Atmel specific flag that is available to Arduino programs running on traditional Arduino hardware. ![]() I'm having problems with the external interruption! GPIO_REG_WRITE(GPIO_STATUS_W1TC_ADDRESS, gpio_status) ĪttachInterrupt(digitalPinToInterrupt(PIN), keypress, FALLING) To check and clear the Interrupt Pending bit, we need to see the interrupt. ![]() Gpio_status = GPIO_REG_READ(GPIO_STATUS_ADDRESS) External Interrupt Configuration can be found in the SYSCFG Registers. To use those API functions, external C headers must be included. ![]() Tue 6:26 pm #79958 dfrap wrote:I found that the Interrupt clearing register GPIO_STATUS_W1TC is part of the SDK. ![]()
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