Issues with GPIO Configuration and Button Functionality on STM32

So guys, In my setup, I’ve configured the GPIO pins as follows:

RCC->AHBENR |= RCC_AHBENR_GPIOAEN; // Enable the bus for port IOPA.

GPIOA->MODER |= 0x400; // Set MODER5 (PA5) for LD2,
GPIOA->MODER |= 0x100000; // Set MODER10 (PA10) for LED

GPIOC->PUPDR |= 0x2000000; // Configure PC13 for B1
GPIOA->PUPDR |= 0x20; // Configure PA2 for B2

RCC->AHBENR |= RCC_AHBENR_GPIOAEN; // Enable the bus for port IOPA.

GPIOA->MODER |= 0x400; // Set MODER5 (PA5) for LD2,
GPIOA->MODER |= 0x100000; // Set MODER10 (PA10) for LED

GPIOC->PUPDR |= 0x2000000; // Configure PC13 for B1
GPIOA->PUPDR |= 0x20; // Configure PA2 for B2

In the main loop:

while (1)
{
    if(GPIOA->IDR |= 0x4){
        GPIOA->BSRR = 0x400;
        HAL_Delay(1000);
        GPIOA->BRR = 0x400;
        HAL_Delay(1000);
    }

    if(GPIOC->IDR &= 0x2000){
        GPIOA->BRR = 0x20;
    }
    else{
        GPIOA->BSRR = 0x20;
    }
}

while (1)
{
    if(GPIOA->IDR |= 0x4){
        GPIOA->BSRR = 0x400;
        HAL_Delay(1000);
        GPIOA->BRR = 0x400;
        HAL_Delay(1000);
    }

    if(GPIOC->IDR &= 0x2000){
        GPIOA->BRR = 0x20;
    }
    else{
        GPIOA->BSRR = 0x20;
    }
}

The LED is being toggled solely by the initial if statement, and there appears to be no response from the button. The second if statement is accurate but needs to operate in parallel similar to how millis() works within the Arduino IDE. I have some questions: + Have I overlooked any configurations for the button and what steps shall I take to make it function? + What steps do I need to take in order for it to work simultaneously?

9 Replies

ZacckOsiemo•3mo ago

ok I'll bite , what are you attempting

te0•3mo ago

How are you handling debouncing in this?

Sterling•3mo ago

Oh, should have been more elaborate earlier 🙏🏽

Sterling•3mo ago

I am trying to focus on working on a Dual-function button controlled LED system where two LEDs are controlled by different buttons with one being toggled on & off when it's button is pressed whilst the other LED responding to its own button in real-time while both LEDs operate concurrently @ZacckOsiemo

ZacckOsiemo•3mo ago

ok so concurrently means managing multiple tasks at once, not necessarily running at the same time. Is that what you mean or do you mean both running at the same time?

Sterling•3mo ago

running at the same time

ZacckOsiemo•3mo ago

then you need more than one core

ZacckOsiemo•3mo ago

physics, kinda dictates that

Edison_ngunjiri•3mo ago

Hi,Enable clock to port C. RCC_AHB1ENR_GPIOCEN

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Issues with GPIO Configuration and Button Functionality on STM32