STM32 Single chip microcomputer IO interrupt implementation steps

STM32 introduced the new HAL Drive source code, this article gives the GPIO interrupt codes implementation steps:

Step 1) Similar to initializing the gpio required with gpio_initstruct struct initialization, note the mode parameter and Nvic interrupt enable:

Gpio_inittypedef gpio_initstruct;

/* Configure GPIO PINS:PB6 */

__gpiob_clk_enable ();

Gpio_initstruct.pin = gpio_pin_6;//

Gpio_initstruct.mode = gpio_mode_it_rising; Interrupt mode, rising

Gpio_initstruct.pull = Gpio_nopull;

Gpio_initstruct.speed = Gpio_speed_freq_very_high;

Hal_gpio_init (Gpiob, &gpio_initstruct);

Hal_nvic_setpriority (exti4_15_irqn,0,0);

HAL_NVIC_ENABLEIRQ (EXTI4_15_IRQN);

Step 2) Similar to the following, according to the exit line GPIO connected to implement interrupt processing function, remember to call the Hal_gpio_exti_irqhandler () function internally:

void Exti4_15_irqhandler (void)

{

Hal_gpio_exti_irqhandler (Gpio_pin_6);

}

Step 3) similar to the following implementation (replace) weak callback function Hal_gpio_exti_callback (), this function is called automatically by the STM code framework:

void Hal_gpio_exti_callback (uint16_t gpio_pin)
{

Internal implementation of their own processing logic.

}

Complete!

STM32 Single chip microcomputer IO interrupt implementation steps