void GpioMcuSetInterrupt()

in boards/STM32L475_Discovery/gpio-board.c [133:235]

• 91 lines of code
• 26 McCabe index (conditional complexity)

void GpioMcuSetInterrupt( Gpio_t *obj, IrqModes irqMode, IrqPriorities irqPriority, GpioIrqHandler *irqHandler )
{
    if( obj->pin < IOE_0 )
    {
        uint32_t priority = 0;

        IRQn_Type IRQnb = EXTI0_IRQn;
        GPIO_InitTypeDef   GPIO_InitStructure;

        if( irqHandler == NULL )
        {
            return;
        }

        obj->IrqHandler = irqHandler;

        GPIO_InitStructure.Pin =  obj->pinIndex;

        if( irqMode == IRQ_RISING_EDGE )
        {
            GPIO_InitStructure.Mode = GPIO_MODE_IT_RISING;
        }
        else if( irqMode == IRQ_FALLING_EDGE )
        {
            GPIO_InitStructure.Mode = GPIO_MODE_IT_FALLING;
        }
        else
        {
            GPIO_InitStructure.Mode = GPIO_MODE_IT_RISING_FALLING;
        }

        GPIO_InitStructure.Pull = obj->pull;
        GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;

        HAL_GPIO_Init( obj->port, &GPIO_InitStructure );

        switch( irqPriority )
        {
        case IRQ_VERY_LOW_PRIORITY:
        case IRQ_LOW_PRIORITY:
            priority = 3;
            break;
        case IRQ_MEDIUM_PRIORITY:
            priority = 2;
            break;
        case IRQ_HIGH_PRIORITY:
            priority = 1;
            break;
        case IRQ_VERY_HIGH_PRIORITY:
        default:
            priority = 0;
            break;
        }

        switch( obj->pinIndex )
        {
        case GPIO_PIN_0:
            IRQnb = EXTI0_IRQn;
            break;
        case GPIO_PIN_1:
            IRQnb = EXTI1_IRQn;
            break;
        case GPIO_PIN_2:
            IRQnb = EXTI2_IRQn;
            break;
        case GPIO_PIN_3:
            IRQnb = EXTI3_IRQn;
            break;
        case GPIO_PIN_4:
            IRQnb = EXTI4_IRQn;
            break;
        case GPIO_PIN_5:
        case GPIO_PIN_6:
        case GPIO_PIN_7:
        case GPIO_PIN_8:
        case GPIO_PIN_9:
            IRQnb = EXTI9_5_IRQn;
            break;
        case GPIO_PIN_10:
        case GPIO_PIN_11:
        case GPIO_PIN_12:
        case GPIO_PIN_13:
        case GPIO_PIN_14:
        case GPIO_PIN_15:
            IRQnb = EXTI15_10_IRQn;
            break;
        default:
            break;
        }

        GpioIrq[( obj->pin ) & 0x0F] = obj;

        HAL_NVIC_SetPriority( IRQnb , priority, 0 );
        HAL_NVIC_EnableIRQ( IRQnb );
    }
    else
    {
#if defined( BOARD_IOE_EXT )
        // IOExt Pin
        GpioIoeSetInterrupt( obj, irqMode, irqPriority, irqHandler );
#endif
    }
}