rt-thread/bsp/gd32/arm/libraries/gd32_drivers/drv_gpio.c

/*
 * Copyright (c) 2006-2025, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author            Notes
 * 2021-08-20     BruceOu           the first version
 * 2025-11-13     RealThread        general GD driver adaptation
 */

#include <rtdevice.h>
#include <rthw.h>
#include <rtconfig.h>
#include <stdlib.h>

#ifdef RT_USING_PIN

#include "drv_gpio.h"

static const struct pin_index pins[] = {
#ifdef GPIOA
    GD32_PIN(0, A, 0),
    GD32_PIN(1, A, 1),
    GD32_PIN(2, A, 2),
    GD32_PIN(3, A, 3),
    GD32_PIN(4, A, 4),
    GD32_PIN(5, A, 5),
    GD32_PIN(6, A, 6),
    GD32_PIN(7, A, 7),
    GD32_PIN(8, A, 8),
    GD32_PIN(9, A, 9),
    GD32_PIN(10, A, 10),
    GD32_PIN(11, A, 11),
    GD32_PIN(12, A, 12),
    GD32_PIN(13, A, 13),
    GD32_PIN(14, A, 14),
    GD32_PIN(15, A, 15),
#endif
#ifdef GPIOB
    GD32_PIN(16, B, 0),
    GD32_PIN(17, B, 1),
    GD32_PIN(18, B, 2),
    GD32_PIN(19, B, 3),
    GD32_PIN(20, B, 4),
    GD32_PIN(21, B, 5),
    GD32_PIN(22, B, 6),
    GD32_PIN(23, B, 7),
    GD32_PIN(24, B, 8),
    GD32_PIN(25, B, 9),
    GD32_PIN(26, B, 10),
    GD32_PIN(27, B, 11),
    GD32_PIN(28, B, 12),
    GD32_PIN(29, B, 13),
    GD32_PIN(30, B, 14),
    GD32_PIN(31, B, 15),
#endif
#ifdef GPIOC
    GD32_PIN(32, C, 0),
    GD32_PIN(33, C, 1),
    GD32_PIN(34, C, 2),
    GD32_PIN(35, C, 3),
    GD32_PIN(36, C, 4),
    GD32_PIN(37, C, 5),
    GD32_PIN(38, C, 6),
    GD32_PIN(39, C, 7),
    GD32_PIN(40, C, 8),
    GD32_PIN(41, C, 9),
    GD32_PIN(42, C, 10),
    GD32_PIN(43, C, 11),
    GD32_PIN(44, C, 12),
    GD32_PIN(45, C, 13),
    GD32_PIN(46, C, 14),
    GD32_PIN(47, C, 15),
#endif
#ifdef GPIOD
    GD32_PIN(48, D, 0),
    GD32_PIN(49, D, 1),
    GD32_PIN(50, D, 2),
    GD32_PIN(51, D, 3),
    GD32_PIN(52, D, 4),
    GD32_PIN(53, D, 5),
    GD32_PIN(54, D, 6),
    GD32_PIN(55, D, 7),
    GD32_PIN(56, D, 8),
    GD32_PIN(57, D, 9),
    GD32_PIN(58, D, 10),
    GD32_PIN(59, D, 11),
    GD32_PIN(60, D, 12),
    GD32_PIN(61, D, 13),
    GD32_PIN(62, D, 14),
    GD32_PIN(63, D, 15),
#endif
#ifdef GPIOE
    GD32_PIN(64, E, 0),
    GD32_PIN(65, E, 1),
    GD32_PIN(66, E, 2),
    GD32_PIN(67, E, 3),
    GD32_PIN(68, E, 4),
    GD32_PIN(69, E, 5),
    GD32_PIN(70, E, 6),
    GD32_PIN(71, E, 7),
    GD32_PIN(72, E, 8),
    GD32_PIN(73, E, 9),
    GD32_PIN(74, E, 10),
    GD32_PIN(75, E, 11),
    GD32_PIN(76, E, 12),
    GD32_PIN(77, E, 13),
    GD32_PIN(78, E, 14),
    GD32_PIN(79, E, 15),
#endif
#ifdef GPIOF
    GD32_PIN(80, F, 0),
    GD32_PIN(81, F, 1),
    GD32_PIN(82, F, 2),
    GD32_PIN(83, F, 3),
    GD32_PIN(84, F, 4),
    GD32_PIN(85, F, 5),
    GD32_PIN(86, F, 6),
    GD32_PIN(87, F, 7),
    GD32_PIN(88, F, 8),
    GD32_PIN(89, F, 9),
    GD32_PIN(90, F, 10),
    GD32_PIN(91, F, 11),
    GD32_PIN(92, F, 12),
    GD32_PIN(93, F, 13),
    GD32_PIN(94, F, 14),
    GD32_PIN(95, F, 15),
#endif
#ifdef GPIOG
    GD32_PIN(96, G, 0),
    GD32_PIN(97, G, 1),
    GD32_PIN(98, G, 2),
    GD32_PIN(99, G, 3),
    GD32_PIN(100, G, 4),
    GD32_PIN(101, G, 5),
    GD32_PIN(102, G, 6),
    GD32_PIN(103, G, 7),
    GD32_PIN(104, G, 8),
    GD32_PIN(105, G, 9),
    GD32_PIN(106, G, 10),
    GD32_PIN(107, G, 11),
    GD32_PIN(108, G, 12),
    GD32_PIN(109, G, 13),
    GD32_PIN(110, G, 14),
    GD32_PIN(111, G, 15),
#endif
#ifdef GPIOH
    GD32_PIN(112, H, 0),
    GD32_PIN(113, H, 1),
    GD32_PIN(114, H, 2),
    GD32_PIN(115, H, 3),
    GD32_PIN(116, H, 4),
    GD32_PIN(117, H, 5),
    GD32_PIN(118, H, 6),
    GD32_PIN(119, H, 7),
    GD32_PIN(120, H, 8),
    GD32_PIN(121, H, 9),
    GD32_PIN(122, H, 10),
    GD32_PIN(123, H, 11),
    GD32_PIN(124, H, 12),
    GD32_PIN(125, H, 13),
    GD32_PIN(126, H, 14),
    GD32_PIN(127, H, 15),
#endif
#ifdef GPIOI
    GD32_PIN(128, I, 0),
    GD32_PIN(129, I, 1),
    GD32_PIN(130, I, 2),
    GD32_PIN(131, I, 3),
    GD32_PIN(132, I, 4),
    GD32_PIN(133, I, 5),
    GD32_PIN(134, I, 6),
    GD32_PIN(135, I, 7),
    GD32_PIN(136, I, 8),
    GD32_PIN(137, I, 9),
    GD32_PIN(138, I, 10),
    GD32_PIN(139, I, 11),
    GD32_PIN(140, I, 12),
    GD32_PIN(141, I, 13),
    GD32_PIN(142, I, 14),
    GD32_PIN(143, I, 15),
#endif
};

#if defined SOC_SERIES_GD32E23x
static const struct pin_irq_map pin_irq_map[] = {
    { GPIO_PIN_0, EXTI0_1_IRQn },
    { GPIO_PIN_1, EXTI0_1_IRQn },
    { GPIO_PIN_2, EXTI2_3_IRQn },
    { GPIO_PIN_3, EXTI2_3_IRQn },
    { GPIO_PIN_4, EXTI4_15_IRQn },
    { GPIO_PIN_5, EXTI4_15_IRQn },
    { GPIO_PIN_6, EXTI4_15_IRQn },
    { GPIO_PIN_7, EXTI4_15_IRQn },
    { GPIO_PIN_8, EXTI4_15_IRQn },
    { GPIO_PIN_9, EXTI4_15_IRQn },
    { GPIO_PIN_10, EXTI4_15_IRQn },
    { GPIO_PIN_11, EXTI4_15_IRQn },
    { GPIO_PIN_12, EXTI4_15_IRQn },
    { GPIO_PIN_13, EXTI4_15_IRQn },
    { GPIO_PIN_14, EXTI4_15_IRQn },
    { GPIO_PIN_15, EXTI4_15_IRQn },
};
#else
static const struct pin_irq_map pin_irq_map[] = {
    { GPIO_PIN_0, EXTI0_IRQn },
    { GPIO_PIN_1, EXTI1_IRQn },
    { GPIO_PIN_2, EXTI2_IRQn },
    { GPIO_PIN_3, EXTI3_IRQn },
    { GPIO_PIN_4, EXTI4_IRQn },
    { GPIO_PIN_5, EXTI5_9_IRQn },
    { GPIO_PIN_6, EXTI5_9_IRQn },
    { GPIO_PIN_7, EXTI5_9_IRQn },
    { GPIO_PIN_8, EXTI5_9_IRQn },
    { GPIO_PIN_9, EXTI5_9_IRQn },
    { GPIO_PIN_10, EXTI10_15_IRQn },
    { GPIO_PIN_11, EXTI10_15_IRQn },
    { GPIO_PIN_12, EXTI10_15_IRQn },
    { GPIO_PIN_13, EXTI10_15_IRQn },
    { GPIO_PIN_14, EXTI10_15_IRQn },
    { GPIO_PIN_15, EXTI10_15_IRQn },
};
#endif

struct rt_pin_irq_hdr pin_irq_hdr_tab[] = {
    { -1, 0, RT_NULL, RT_NULL },
    { -1, 0, RT_NULL, RT_NULL },
    { -1, 0, RT_NULL, RT_NULL },
    { -1, 0, RT_NULL, RT_NULL },
    { -1, 0, RT_NULL, RT_NULL },
    { -1, 0, RT_NULL, RT_NULL },
    { -1, 0, RT_NULL, RT_NULL },
    { -1, 0, RT_NULL, RT_NULL },
    { -1, 0, RT_NULL, RT_NULL },
    { -1, 0, RT_NULL, RT_NULL },
    { -1, 0, RT_NULL, RT_NULL },
    { -1, 0, RT_NULL, RT_NULL },
    { -1, 0, RT_NULL, RT_NULL },
    { -1, 0, RT_NULL, RT_NULL },
    { -1, 0, RT_NULL, RT_NULL },
    { -1, 0, RT_NULL, RT_NULL },
};

#define ITEM_NUM(items) sizeof(items) / sizeof(items[0])

/**
  * @brief  get pin
  * @param  pin
  * @retval None
  */
const struct pin_index *get_pin(rt_uint8_t pin)
{
    const struct pin_index *index;

    if (pin < ITEM_NUM(pins))
    {
        index = &pins[pin];
        if (index->index == -1)
            index = RT_NULL;
    }
    else
    {
        index = RT_NULL;
    }

    return index;
}

int get_pin_config(const char *pin_name, uint32_t *port, uint32_t *pin, rcu_periph_enum *clk)
{
    if (pin_name == NULL || port == NULL || pin == NULL || clk == NULL)
    {
        return -RT_ERROR;
    }

    if (rt_strlen(pin_name) < 3 || pin_name[0] != 'P')
    {
        return -RT_ERROR;
    }

    char port_letter = pin_name[1];
    switch (port_letter)
    {
#ifdef GPIOA
    case 'A':
        *port = GPIOA;
        *clk = RCU_GPIOA;
        break;
#endif /* GPIOA */
#ifdef GPIOB
    case 'B':
        *port = GPIOB;
        *clk = RCU_GPIOB;
        break;
#endif /* GPIOB */
#ifdef GPIOC
    case 'C':
        *port = GPIOC;
        *clk = RCU_GPIOC;
        break;
#endif /* GPIOC */
#ifdef GPIOD
    case 'D':
        *port = GPIOD;
        *clk = RCU_GPIOD;
        break;
#endif /* GPIOD */
#ifdef GPIOE
    case 'E':
        *port = GPIOE;
        *clk = RCU_GPIOE;
        break;
#endif /* GPIOE */
#ifdef GPIOF
    case 'F':
        *port = GPIOF;
        *clk = RCU_GPIOF;
        break;
#endif /* GPIOF */
#ifdef GPIOG
    case 'G':
        *port = GPIOG;
        *clk = RCU_GPIOG;
        break;
#endif /* GPIOG */
#ifdef GPIOH
    case 'H':
        *port = GPIOH;
        *clk = RCU_GPIOH;
        break;
#endif /* GPIOH */
#ifdef GPIOI
    case 'I':
        *port = GPIOI;
        *clk = RCU_GPIOI;
        break;
#endif /* GPIOI */
#ifdef GPIOJ
    case 'J':
        *port = GPIOJ;
        *clk = RCU_GPIOJ;
        break;
#endif /* GPIOJ */
#ifdef GPIOK
    case 'K':
        *port = GPIOK;
        *clk = RCU_GPIOK;
        break;
#endif /* GPIOK */
    default:
        return -RT_ERROR;
    }

    int pin_num = atoi(pin_name + 2);
    if (pin_num < 0 || pin_num > 15)
    {
        return -RT_ERROR;
    }
    *pin = GPIO_PIN_0 << pin_num;

    return 0;
}

int pin_alternate_config(const char *alternate, uint32_t *af)
{
    if (alternate == NULL || af == NULL)
    {
        return -RT_ERROR;
    }

    if (alternate[0] != 'A' || alternate[1] != 'F')
    {
        return -RT_ERROR;
    }

    int af_num = atoi(alternate + 2);
    if (af_num < 0 || af_num > 15)
    {
        return -RT_ERROR;
    }

    switch (af_num)
    {
#ifdef GPIO_AF_0
        case 0: *af = GPIO_AF_0; break;
#endif /* GPIO_AF_0 */
#ifdef GPIO_AF_1
        case 1: *af = GPIO_AF_1; break;
#endif /* GPIO_AF_1 */
#ifdef GPIO_AF_2
        case 2: *af = GPIO_AF_2; break;
#endif /* GPIO_AF_2 */
#ifdef GPIO_AF_3
        case 3: *af = GPIO_AF_3; break;
#endif /* GPIO_AF_3 */
#ifdef GPIO_AF_4
        case 4: *af = GPIO_AF_4; break;
#endif /* GPIO_AF_4 */
#ifdef GPIO_AF_5
        case 5: *af = GPIO_AF_5; break;
#endif /* GPIO_AF_5 */
#ifdef GPIO_AF_6
        case 6: *af = GPIO_AF_6; break;
#endif /* GPIO_AF_6 */
#ifdef GPIO_AF_7
        case 7: *af = GPIO_AF_7; break;
#endif /* GPIO_AF_7 */
#ifdef GPIO_AF_8
        case 8: *af = GPIO_AF_8; break;
#endif /* GPIO_AF_8 */
#ifdef GPIO_AF_9
        case 9: *af = GPIO_AF_9; break;
#endif /* GPIO_AF_9 */
#ifdef GPIO_AF_10
        case 10: *af = GPIO_AF_10; break;
#endif /* GPIO_AF_10 */
#ifdef GPIO_AF_11
        case 11: *af = GPIO_AF_11; break;
#endif /* GPIO_AF_11 */
#ifdef GPIO_AF_12
        case 12: *af = GPIO_AF_12; break;
#endif /* GPIO_AF_12 */
#ifdef GPIO_AF_13
        case 13: *af = GPIO_AF_13; break;
#endif /* GPIO_AF_13 */
#ifdef GPIO_AF_14
        case 14: *af = GPIO_AF_14; break;
#endif /* GPIO_AF_14 */
#ifdef GPIO_AF_15
        case 15: *af = GPIO_AF_15; break;
#endif /* GPIO_AF_15 */
        default: return -1;
    }

    return 0;
}

/**
  * @brief  set pin mode
  * @param  dev, pin, mode
  * @retval None
  */
static void gd32_pin_mode(rt_device_t dev, rt_base_t pin, rt_uint8_t mode)
{
    const struct pin_index *index = RT_NULL;
    rt_uint32_t pin_mode = 0;

#if defined SOC_SERIES_GD32F4xx || defined SOC_SERIES_GD32H7xx || defined SOC_SERIES_GD32H75E || defined SOC_SERIES_GD32F5xx || defined SOC_SERIES_GD32E23x
    rt_uint32_t pin_pupd = 0, pin_odpp = 0;
#endif

    index = get_pin(pin);
    if (index == RT_NULL)
    {
        return;
    }

    /* GPIO Periph clock enable */
    rcu_periph_clock_enable(index->clk);
#if defined SOC_SERIES_GD32F4xx || defined SOC_SERIES_GD32H7xx || defined SOC_SERIES_GD32H75E || defined SOC_SERIES_GD32F5xx || defined SOC_SERIES_GD32E23x
    pin_mode = GPIO_MODE_OUTPUT;
#else
    pin_mode = GPIO_MODE_OUT_PP;
#endif

    switch (mode)
    {
    case PIN_MODE_OUTPUT:
        /* output setting */
#if defined SOC_SERIES_GD32F4xx || defined SOC_SERIES_GD32H7xx || defined SOC_SERIES_GD32H75E || defined SOC_SERIES_GD32F5xx || defined SOC_SERIES_GD32E23x
        pin_mode = GPIO_MODE_OUTPUT;
        pin_pupd = GPIO_PUPD_NONE;
        pin_odpp = GPIO_OTYPE_PP;
#else
        pin_mode = GPIO_MODE_OUT_PP;
#endif
        break;
    case PIN_MODE_OUTPUT_OD:
        /* output setting: od. */
#if defined SOC_SERIES_GD32F4xx || defined SOC_SERIES_GD32H7xx || defined SOC_SERIES_GD32H75E || defined SOC_SERIES_GD32F5xx || defined SOC_SERIES_GD32E23x
        pin_mode = GPIO_MODE_OUTPUT;
        pin_pupd = GPIO_PUPD_NONE;
        pin_odpp = GPIO_OTYPE_OD;
#else
        pin_mode = GPIO_MODE_OUT_OD;
#endif
        break;
    case PIN_MODE_INPUT:
        /* input setting: not pull. */
#if defined SOC_SERIES_GD32F4xx || defined SOC_SERIES_GD32H7xx || defined SOC_SERIES_GD32H75E || defined SOC_SERIES_GD32F5xx || defined SOC_SERIES_GD32E23x
        pin_mode = GPIO_MODE_INPUT;
        pin_pupd = GPIO_PUPD_PULLUP | GPIO_PUPD_PULLDOWN;
#else
        pin_mode = GPIO_MODE_IN_FLOATING;
#endif
        break;
    case PIN_MODE_INPUT_PULLUP:
        /* input setting: pull up. */
#if defined SOC_SERIES_GD32F4xx || defined SOC_SERIES_GD32H7xx || defined SOC_SERIES_GD32H75E || defined SOC_SERIES_GD32F5xx || defined SOC_SERIES_GD32E23x
        pin_mode = GPIO_MODE_INPUT;
        pin_pupd = GPIO_PUPD_PULLUP;
#else
        pin_mode = GPIO_MODE_IPU;
#endif
        break;
    case PIN_MODE_INPUT_PULLDOWN:
        /* input setting: pull down. */
#if defined SOC_SERIES_GD32F4xx || defined SOC_SERIES_GD32H7xx || defined SOC_SERIES_GD32H75E || defined SOC_SERIES_GD32F5xx || defined SOC_SERIES_GD32E23x
        pin_mode = GPIO_MODE_INPUT;
        pin_pupd = GPIO_PUPD_PULLDOWN;
#else
        pin_mode = GPIO_MODE_IPD;
#endif
        break;
    default:
        break;
    }

#if defined SOC_SERIES_GD32F4xx || defined SOC_SERIES_GD32F5xx || defined SOC_SERIES_GD32E23x
    gpio_mode_set(index->gpio_periph, pin_mode, pin_pupd, index->pin);
    if (pin_mode == GPIO_MODE_OUTPUT)
    {
        gpio_output_options_set(index->gpio_periph, pin_odpp, GPIO_OSPEED_50MHZ, index->pin);
    }
#elif defined SOC_SERIES_GD32H7xx || defined SOC_SERIES_GD32H75E
    gpio_mode_set(index->gpio_periph, pin_mode, pin_pupd, index->pin);
    if (pin_mode == GPIO_MODE_OUTPUT)
    {
        gpio_output_options_set(index->gpio_periph, pin_odpp, GPIO_OSPEED_60MHZ, index->pin);
    }
#else
    gpio_init(index->gpio_periph, pin_mode, GPIO_OSPEED_50MHZ, index->pin);
#endif
}

/**
  * @brief  pin write
  * @param  dev, pin, valuie
  * @retval None
  */
static void gd32_pin_write(rt_device_t dev, rt_base_t pin, rt_uint8_t value)
{
    const struct pin_index *index = RT_NULL;

    index = get_pin(pin);
    if (index == RT_NULL)
    {
        return;
    }

    gpio_bit_write(index->gpio_periph, index->pin, (bit_status)value);
}

/**
  * @brief  pin read
  * @param  dev, pin
  * @retval None
  */
static rt_ssize_t gd32_pin_read(rt_device_t dev, rt_base_t pin)
{
    rt_ssize_t value = PIN_LOW;
    const struct pin_index *index = RT_NULL;

    index = get_pin(pin);
    if (index == RT_NULL)
    {
        return -RT_EINVAL;
    }

    value = gpio_input_bit_get(index->gpio_periph, index->pin);
    return value;
}

/**
  * @brief  bit2bitno
  * @param  bit
  * @retval None
  */
rt_inline rt_int32_t bit2bitno(rt_uint32_t bit)
{
    rt_uint8_t i;
    for (i = 0; i < 32; i++)
    {
        if ((0x01 << i) == bit)
        {
            return i;
        }
    }
    return -1;
}

/**
  * @brief  pin write
  * @param  pinbit
  * @retval None
  */
rt_inline const struct pin_irq_map *get_pin_irq_map(rt_uint32_t pinbit)
{
    rt_int32_t map_index = bit2bitno(pinbit);
    if (map_index < 0 || map_index >= ITEM_NUM(pin_irq_map))
    {
        return RT_NULL;
    }
    return &pin_irq_map[map_index];
}

/**
  * @brief  pin irq attach
  * @param  device, pin, mode
  * @retval None
  */
static rt_err_t gd32_pin_attach_irq(struct rt_device *device, rt_base_t pin,
                                    rt_uint8_t mode, void (*hdr)(void *args), void *args)
{
    const struct pin_index *index = RT_NULL;
    rt_base_t level;
    rt_int32_t hdr_index = -1;

    index = get_pin(pin);
    if (index == RT_NULL)
    {
        return -RT_EINVAL;
    }

    hdr_index = bit2bitno(index->pin);
    if (hdr_index < 0 || hdr_index >= ITEM_NUM(pin_irq_map))
    {
        return -RT_EINVAL;
    }

    level = rt_hw_interrupt_disable();
    if (pin_irq_hdr_tab[hdr_index].pin == pin &&
        pin_irq_hdr_tab[hdr_index].hdr == hdr &&
        pin_irq_hdr_tab[hdr_index].mode == mode &&
        pin_irq_hdr_tab[hdr_index].args == args)
    {
        rt_hw_interrupt_enable(level);
        return RT_EOK;
    }

    if (pin_irq_hdr_tab[hdr_index].pin != -1)
    {
        rt_hw_interrupt_enable(level);
        return -RT_EFULL;
    }
    pin_irq_hdr_tab[hdr_index].pin = pin;
    pin_irq_hdr_tab[hdr_index].hdr = hdr;
    pin_irq_hdr_tab[hdr_index].mode = mode;
    pin_irq_hdr_tab[hdr_index].args = args;
    rt_hw_interrupt_enable(level);

    return RT_EOK;
}

/**
  * @brief  pin irq detach
  * @param  device, pin
  * @retval None
  */
static rt_err_t gd32_pin_detach_irq(struct rt_device *device, rt_base_t pin)
{
    const struct pin_index *index = RT_NULL;
    rt_base_t level;
    rt_int32_t hdr_index = -1;

    index = get_pin(pin);
    if (index == RT_NULL)
    {
        return -RT_EINVAL;
    }

    hdr_index = bit2bitno(index->pin);
    if (hdr_index < 0 || hdr_index >= ITEM_NUM(pin_irq_map))
    {
        return -RT_EINVAL;
    }

    level = rt_hw_interrupt_disable();
    if (pin_irq_hdr_tab[hdr_index].pin == -1)
    {
        rt_hw_interrupt_enable(level);
        return RT_EOK;
    }
    pin_irq_hdr_tab[hdr_index].pin = -1;
    pin_irq_hdr_tab[hdr_index].hdr = RT_NULL;
    pin_irq_hdr_tab[hdr_index].mode = 0;
    pin_irq_hdr_tab[hdr_index].args = RT_NULL;
    rt_hw_interrupt_enable(level);

    return RT_EOK;
}

/**
  * @brief  pin irq enable
  * @param  device, pin, enabled
  * @retval None
  */
static rt_err_t gd32_pin_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint8_t enabled)
{
    const struct pin_index *index;
    const struct pin_irq_map *irqmap;
    rt_base_t level;
    rt_int32_t hdr_index = -1;
    exti_trig_type_enum trigger_mode;

    index = get_pin(pin);
    if (index == RT_NULL)
    {
        return -RT_EINVAL;
    }

    if (enabled == PIN_IRQ_ENABLE)
    {
        hdr_index = bit2bitno(index->pin);
        if (hdr_index < 0 || hdr_index >= ITEM_NUM(pin_irq_map))
        {
            return -RT_EINVAL;
        }

        level = rt_hw_interrupt_disable();
        if (pin_irq_hdr_tab[hdr_index].pin == -1)
        {
            rt_hw_interrupt_enable(level);
            return -RT_EINVAL;
        }

        irqmap = &pin_irq_map[hdr_index];

        switch (pin_irq_hdr_tab[hdr_index].mode)
        {
        case PIN_IRQ_MODE_RISING:
            trigger_mode = EXTI_TRIG_RISING;
            break;
        case PIN_IRQ_MODE_FALLING:
            trigger_mode = EXTI_TRIG_FALLING;
            break;
        case PIN_IRQ_MODE_RISING_FALLING:
            trigger_mode = EXTI_TRIG_BOTH;
            break;
        default:
            rt_hw_interrupt_enable(level);
            return -RT_EINVAL;
        }

#if defined SOC_SERIES_GD32F4xx || defined SOC_SERIES_GD32H7xx || defined SOC_SERIES_GD32H75E || defined SOC_SERIES_GD32F5xx
        rcu_periph_clock_enable(RCU_SYSCFG);
#elif defined SOC_SERIES_GD32E23x
        rcu_periph_clock_enable(RCU_CFGCMP);
#else
        rcu_periph_clock_enable(RCU_AF);
#endif

        /* enable and set interrupt priority */
#if defined SOC_SERIES_GD32E23x
        nvic_irq_enable(irqmap->irqno, 5U);
#else
        nvic_irq_enable(irqmap->irqno, 5U, 0U);
#endif
        /* connect EXTI line to  GPIO pin */
#if defined SOC_SERIES_GD32F4xx || defined SOC_SERIES_GD32H7xx || defined SOC_SERIES_GD32H75E || defined SOC_SERIES_GD32F5xx || defined SOC_SERIES_GD32E23x
        syscfg_exti_line_config(index->port_src, index->pin_src);
#else
        gpio_exti_source_select(index->port_src, index->pin_src);
#endif

        /* configure EXTI line */
        exti_init((exti_line_enum)(index->exit_line), EXTI_INTERRUPT, trigger_mode);
        exti_interrupt_flag_clear((exti_line_enum)(index->exit_line));

        rt_hw_interrupt_enable(level);
    }
    else if (enabled == PIN_IRQ_DISABLE)
    {
        irqmap = get_pin_irq_map(index->pin);
        if (irqmap == RT_NULL)
        {
            return -RT_EINVAL;
        }
        nvic_irq_disable(irqmap->irqno);
    }
    else
    {
        return -RT_EINVAL;
    }

    return RT_EOK;
}

const static struct rt_pin_ops gd32_pin_ops = {
    .pin_mode = gd32_pin_mode,
    .pin_write = gd32_pin_write,
    .pin_read = gd32_pin_read,
    .pin_attach_irq = gd32_pin_attach_irq,
    .pin_detach_irq = gd32_pin_detach_irq,
    .pin_irq_enable = gd32_pin_irq_enable,
    RT_NULL,
};

/**
  * @brief  pin write
  * @param  irqno
  * @retval None
  */
rt_inline void pin_irq_hdr(int irqno)
{
    if (pin_irq_hdr_tab[irqno].hdr)
    {
        pin_irq_hdr_tab[irqno].hdr(pin_irq_hdr_tab[irqno].args);
    }
}

/**
  * @brief  gd32 exit interrupt
  * @param  exti_line
  * @retval None
  */
void GD32_GPIO_EXTI_IRQHandler(rt_int8_t exti_line)
{
#if defined(SOC_SERIES_GD32H7xx) || defined(SOC_SERIES_GD32H75E)
    exti_line_enum pin_exti_line = exti_line;
#else
    exti_line_enum pin_exti_line = 1 << exti_line;
#endif

    if (RESET != exti_interrupt_flag_get(pin_exti_line))
    {
        pin_irq_hdr(exti_line);
        exti_interrupt_flag_clear(pin_exti_line);
    }
}

#if defined SOC_SERIES_GD32E23x
void EXTI0_1_IRQHandler(void)
{
    rt_interrupt_enter();

    GD32_GPIO_EXTI_IRQHandler(0);
    GD32_GPIO_EXTI_IRQHandler(1);

    rt_interrupt_leave();
}

void EXTI2_3_IRQHandler(void)
{
    rt_interrupt_enter();

    GD32_GPIO_EXTI_IRQHandler(2);
    GD32_GPIO_EXTI_IRQHandler(3);

    rt_interrupt_leave();
}

void EXTI4_15_IRQHandler(void)
{
    rt_interrupt_enter();

    GD32_GPIO_EXTI_IRQHandler(4);
    GD32_GPIO_EXTI_IRQHandler(5);
    GD32_GPIO_EXTI_IRQHandler(6);
    GD32_GPIO_EXTI_IRQHandler(7);
    GD32_GPIO_EXTI_IRQHandler(8);
    GD32_GPIO_EXTI_IRQHandler(9);
    GD32_GPIO_EXTI_IRQHandler(10);
    GD32_GPIO_EXTI_IRQHandler(11);
    GD32_GPIO_EXTI_IRQHandler(12);
    GD32_GPIO_EXTI_IRQHandler(13);
    GD32_GPIO_EXTI_IRQHandler(14);
    GD32_GPIO_EXTI_IRQHandler(15);

    rt_interrupt_leave();
}
#else
void EXTI0_IRQHandler(void)
{
    rt_interrupt_enter();
    GD32_GPIO_EXTI_IRQHandler(0);
    rt_interrupt_leave();
}

void EXTI1_IRQHandler(void)
{
    rt_interrupt_enter();
    GD32_GPIO_EXTI_IRQHandler(1);
    rt_interrupt_leave();
}

void EXTI2_IRQHandler(void)
{
    rt_interrupt_enter();
    GD32_GPIO_EXTI_IRQHandler(2);
    rt_interrupt_leave();
}

void EXTI3_IRQHandler(void)
{
    rt_interrupt_enter();
    GD32_GPIO_EXTI_IRQHandler(3);
    rt_interrupt_leave();
}

void EXTI4_IRQHandler(void)
{
    rt_interrupt_enter();
    GD32_GPIO_EXTI_IRQHandler(4);
    rt_interrupt_leave();
}

void EXTI5_9_IRQHandler(void)
{
    rt_interrupt_enter();
    GD32_GPIO_EXTI_IRQHandler(5);
    GD32_GPIO_EXTI_IRQHandler(6);
    GD32_GPIO_EXTI_IRQHandler(7);
    GD32_GPIO_EXTI_IRQHandler(8);
    GD32_GPIO_EXTI_IRQHandler(9);
    rt_interrupt_leave();
}

void EXTI10_15_IRQHandler(void)
{
    rt_interrupt_enter();
    GD32_GPIO_EXTI_IRQHandler(10);
    GD32_GPIO_EXTI_IRQHandler(11);
    GD32_GPIO_EXTI_IRQHandler(12);
    GD32_GPIO_EXTI_IRQHandler(13);
    GD32_GPIO_EXTI_IRQHandler(14);
    GD32_GPIO_EXTI_IRQHandler(15);
    rt_interrupt_leave();
}
#endif

int rt_hw_pin_init(void)
{
    int result;

    result = rt_device_pin_register("pin", &gd32_pin_ops, RT_NULL);

    return result;
}

INIT_BOARD_EXPORT(rt_hw_pin_init);

#endif