hal_gpio.h

#ifndef CODEBASE_HAL_HAL_GPIO_H_
#define CODEBASE_HAL_HAL_GPIO_H_

#include "nrf.h"

typedef enum {
  HAL_GPIO_PULL_DISABLED =  GPIO_PIN_CNF_PULL_Disabled,
  HAL_GPIO_PULL_DOWN     =  GPIO_PIN_CNF_PULL_Pulldown,
  HAL_GPIO_PULL_UP       =  GPIO_PIN_CNF_PULL_Pullup   
} hal_gpio_pull_t;

static inline void hal_gpio_cfg(  uint32_t pin_num,
                                    uint32_t dir,
                                    uint32_t input,
                                    uint32_t pull,
                                    uint32_t drive,
                                    uint32_t sense);

static inline void hal_gpio_cfg_output(uint32_t pin_num, uint32_t init_val);

static inline void hal_gpio_cfg_high_output(uint32_t pin_num, uint32_t init_val);

static inline void hal_gpio_cfg_input(uint32_t pin_num, hal_gpio_pull_t pull_config);

static inline void hal_gpio_pin_write(uint32_t pin_num, uint32_t val);

static inline void hal_gpio_pin_set(uint32_t pin_num);

static inline void hal_gpio_pin_clear(uint32_t pin_num);

static inline void hal_gpio_pin_toggle(uint32_t pin_num);

static inline uint32_t hal_gpio_pin_read(uint32_t pin_num);

static inline void hal_gpio_cfg(uint32_t pin_num, uint32_t dir, uint32_t input, uint32_t pull,
        uint32_t drive, uint32_t sense)
{
    NRF_GPIO->PIN_CNF[pin_num] = (dir << GPIO_PIN_CNF_DIR_Pos) | (input << GPIO_PIN_CNF_INPUT_Pos)
            | (pull << GPIO_PIN_CNF_PULL_Pos) | (drive << GPIO_PIN_CNF_DRIVE_Pos)
            | (sense << GPIO_PIN_CNF_SENSE_Pos);
}

static inline void hal_gpio_cfg_output(uint32_t pin_num, uint32_t init_val)
{
    hal_gpio_cfg(pin_num,
        GPIO_PIN_CNF_DIR_Input,
        GPIO_PIN_CNF_INPUT_Disconnect,
        GPIO_PIN_CNF_PULL_Disabled,
        GPIO_PIN_CNF_DRIVE_S0S1,
        GPIO_PIN_CNF_SENSE_Disabled);
    hal_gpio_pin_write(pin_num, init_val);
    hal_gpio_cfg(pin_num,
        GPIO_PIN_CNF_DIR_Output,
        GPIO_PIN_CNF_INPUT_Disconnect,
        GPIO_PIN_CNF_PULL_Disabled,
        GPIO_PIN_CNF_DRIVE_S0S1,
        GPIO_PIN_CNF_SENSE_Disabled);
}

static inline void hal_gpio_cfg_high_output(uint32_t pin_num, uint32_t init_val)
{
    hal_gpio_cfg(pin_num,
        GPIO_PIN_CNF_DIR_Input,
        GPIO_PIN_CNF_INPUT_Disconnect,
        GPIO_PIN_CNF_PULL_Disabled,
        GPIO_PIN_CNF_DRIVE_S0S1,
        GPIO_PIN_CNF_SENSE_Disabled);
    hal_gpio_pin_write(pin_num, init_val);
    hal_gpio_cfg(pin_num,
        GPIO_PIN_CNF_DIR_Output,
        GPIO_PIN_CNF_INPUT_Disconnect,
        GPIO_PIN_CNF_PULL_Disabled,
        GPIO_PIN_CNF_DRIVE_H0H1,
        GPIO_PIN_CNF_SENSE_Disabled);
}

static inline void hal_gpio_cfg_input(uint32_t pin_num, hal_gpio_pull_t pull_config)
{
    hal_gpio_cfg(pin_num,
        GPIO_PIN_CNF_DIR_Input,
        GPIO_PIN_CNF_INPUT_Connect, pull_config,
        GPIO_PIN_CNF_DRIVE_S0S1,
        GPIO_PIN_CNF_SENSE_Disabled);
}

static inline void hal_gpio_pin_write(uint32_t pin_num, uint32_t val)
{
    if (val)
    {
        hal_gpio_pin_set(pin_num);
    }
    else
    {
        hal_gpio_pin_clear(pin_num);
    }
}

static inline void hal_gpio_pin_set(uint32_t pin_num)
{
    NRF_GPIO->OUTSET = (1UL << pin_num);
}

static inline void hal_gpio_pin_clear(uint32_t pin_num)
{
    NRF_GPIO->OUTCLR = (1UL << pin_num);
}

static inline void hal_gpio_pin_toggle(uint32_t pin_num)
{
    const uint32_t pin_bit = 1UL << pin_num;
    const uint32_t pin_state = (NRF_GPIO->OUT & pin_bit);

    if (pin_state == 0)
    {
        // Low to high
        NRF_GPIO->OUTSET = pin_bit;
    }
    else
    {
        // High to low
        NRF_GPIO->OUTCLR = pin_bit;
    }
}

static inline uint32_t hal_gpio_pin_read(uint32_t pin_num)
{
    return ((NRF_GPIO->IN >> pin_num) & 1UL);
}

#endif /* CODEBASE_HAL_HAL_GPIO_H_ */