/*
* IRQ setup:
* Trigger an interrupt whenever a button is depressed.
*/
static void irq_setup(void)
{
const u32 btnpins = USR_SW1 | USR_SW2;
/* Configure interrupt as edge-sensitive */
GPIO_IS(GPIOF) &= ~btnpins;
/* Interrupt only respond to rising or falling edge (single-edge) */
GPIO_IBE(GPIOF) &= ~btnpins;
/* Trigger interrupt on rising-edge (when button is depressed) */
GPIO_IEV(GPIOF) |= btnpins;
/* Finally, Enable interrupt */
GPIO_IM(GPIOF) |= btnpins;
/* Enable the interrupt in the NVIC as well */
nvic_enable_irq(NVIC_GPIOF_IRQ);
}
/**
* \brief Disable interrupts on specified GPIO pins
*
* Disable interrupts on the specified GPIO pins
*
* Note that the NVIC must be enabled and properly configured for the interrupt
* to be routed to the CPU.
*
* @param[in] gpioport GPIO block register address base @ref gpio_reg_base
* @param[in] gpios @ref gpio_pin_id. Pins whose interrupts to disable. Any
* combination of pins may be specified by OR'ing them
* together.
*/
void gpio_disable_interrupts(uint32_t gpioport, uint8_t gpios)
{
GPIO_IM(gpioport) |= gpios;
}
