unleashed-firmware/firmware/targets/f4/api-hal/api-hal-gpio.c

#include <api-hal-gpio.h>
#include <api-hal-spi.h>
#include <api-hal-resources.h>
#include <api-hal-delay.h>

// init GPIO
void hal_gpio_init(
    const GpioPin* gpio,
    const GpioMode mode,
    const GpioPull pull,
    const GpioSpeed speed) {
    // TODO: Alternate Functions
    GPIO_InitTypeDef GPIO_InitStruct = {0};

    GPIO_InitStruct.Pin = gpio->pin;
    GPIO_InitStruct.Mode = mode;
    GPIO_InitStruct.Pull = pull;
    GPIO_InitStruct.Speed = speed;

    HAL_GPIO_Init(gpio->port, &GPIO_InitStruct);
}

bool hal_gpio_read_sd_detect(void) {
    bool result = false;

    // TODO open record
    const GpioPin* sd_cs_record = &sd_cs_gpio;

    // TODO: SPI manager
    api_hal_spi_lock(sd_fast_spi.spi);

    // configure pin as input
    gpio_init_ex(sd_cs_record, GpioModeInput, GpioPullUp, GpioSpeedVeryHigh);
    delay(1);

    // if gpio_read == 0 return true else return false
    result = !gpio_read(sd_cs_record);

    // configure pin back
    gpio_init_ex(sd_cs_record, GpioModeOutputPushPull, GpioPullNo, GpioSpeedVeryHigh);
    gpio_write(sd_cs_record, 1);
    delay(1);

    // TODO: SPI manager
    api_hal_spi_unlock(sd_fast_spi.spi);

    return result;
}

void enable_cc1101_irq() {
    HAL_NVIC_SetPriority(EXTI4_IRQn, 5, 0);
    HAL_NVIC_EnableIRQ(EXTI4_IRQn);
}