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rt-thread/bsp/at32/libraries/rt_drivers/drv_gpio.c

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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-05-16 shelton first version
* 2023-01-31 shelton add support f421/f425
*/
#include "drv_common.h"
#include "drv_gpio.h"
#ifdef RT_USING_PIN
#define PIN_NUM(port, no) (((((port) & 0xFu) << 4) | ((no) & 0xFu)))
#define PIN_PORT(pin) ((uint8_t)(((pin) >> 4) & 0xFu))
#define PIN_NO(pin) ((uint8_t)((pin) & 0xFu))
#if defined (SOC_SERIES_AT32F435) || defined (SOC_SERIES_AT32F437) || \
defined (SOC_SERIES_AT32F421) || defined (SOC_SERIES_AT32F425)
#define PIN_ATPORTSOURCE(pin) (scfg_port_source_type)((uint8_t)(((pin) & 0xF0u) >> 4))
#define PIN_ATPINSOURCE(pin) (scfg_pins_source_type)((uint8_t)((pin) & 0xFu))
#else
#define PIN_ATPORTSOURCE(pin) (gpio_port_source_type)((uint8_t)(((pin) & 0xF0u) >> 4))
#define PIN_ATPINSOURCE(pin) (gpio_pins_source_type)((uint8_t)((pin) & 0xFu))
#endif
#define PIN_ATPORT(pin) ((gpio_type *)(GPIOA_BASE + (0x400u * PIN_PORT(pin))))
#define PIN_ATPIN(pin) ((uint16_t)(1u << PIN_NO(pin)))
#if defined(GPIOZ)
#define __AT32_PORT_MAX 12u
#elif defined(GPIOK)
#define __AT32_PORT_MAX 11u
#elif defined(GPIOJ)
#define __AT32_PORT_MAX 10u
#elif defined(GPIOI)
#define __AT32_PORT_MAX 9u
#elif defined(GPIOH)
#define __AT32_PORT_MAX 8u
#elif defined(GPIOG)
#define __AT32_PORT_MAX 7u
#elif defined(GPIOF)
#define __AT32_PORT_MAX 6u
#elif defined(GPIOE)
#define __AT32_PORT_MAX 5u
#elif defined(GPIOD)
#define __AT32_PORT_MAX 4u
#elif defined(GPIOC)
#define __AT32_PORT_MAX 3u
#elif defined(GPIOB)
#define __AT32_PORT_MAX 2u
#elif defined(GPIOA)
#define __AT32_PORT_MAX 1u
#else
#define __AT32_PORT_MAX 0u
#error Unsupported AT32 GPIO peripheral.
#endif
#define PIN_ATPORT_MAX __AT32_PORT_MAX
#if defined (SOC_SERIES_AT32F421) || defined (SOC_SERIES_AT32F425)
static const struct pin_irq_map pin_irq_map[] =
{
{GPIO_PINS_0, EXINT_LINE_0, EXINT1_0_IRQn},
{GPIO_PINS_1, EXINT_LINE_1, EXINT1_0_IRQn},
{GPIO_PINS_2, EXINT_LINE_2, EXINT3_2_IRQn},
{GPIO_PINS_3, EXINT_LINE_3, EXINT3_2_IRQn},
{GPIO_PINS_4, EXINT_LINE_4, EXINT15_4_IRQn},
{GPIO_PINS_5, EXINT_LINE_5, EXINT15_4_IRQn},
{GPIO_PINS_6, EXINT_LINE_6, EXINT15_4_IRQn},
{GPIO_PINS_7, EXINT_LINE_7, EXINT15_4_IRQn},
{GPIO_PINS_8, EXINT_LINE_8, EXINT15_4_IRQn},
{GPIO_PINS_9, EXINT_LINE_9, EXINT15_4_IRQn},
{GPIO_PINS_10, EXINT_LINE_10, EXINT15_4_IRQn},
{GPIO_PINS_11, EXINT_LINE_11, EXINT15_4_IRQn},
{GPIO_PINS_12, EXINT_LINE_12, EXINT15_4_IRQn},
{GPIO_PINS_13, EXINT_LINE_13, EXINT15_4_IRQn},
{GPIO_PINS_14, EXINT_LINE_14, EXINT15_4_IRQn},
{GPIO_PINS_15, EXINT_LINE_15, EXINT15_4_IRQn},
};
#else
static const struct pin_irq_map pin_irq_map[] =
{
{GPIO_PINS_0, EXINT_LINE_0, EXINT0_IRQn},
{GPIO_PINS_1, EXINT_LINE_1, EXINT1_IRQn},
{GPIO_PINS_2, EXINT_LINE_2, EXINT2_IRQn},
{GPIO_PINS_3, EXINT_LINE_3, EXINT3_IRQn},
{GPIO_PINS_4, EXINT_LINE_4, EXINT4_IRQn},
{GPIO_PINS_5, EXINT_LINE_5, EXINT9_5_IRQn},
{GPIO_PINS_6, EXINT_LINE_6, EXINT9_5_IRQn},
{GPIO_PINS_7, EXINT_LINE_7, EXINT9_5_IRQn},
{GPIO_PINS_8, EXINT_LINE_8, EXINT9_5_IRQn},
{GPIO_PINS_9, EXINT_LINE_9, EXINT9_5_IRQn},
{GPIO_PINS_10, EXINT_LINE_10, EXINT15_10_IRQn},
{GPIO_PINS_11, EXINT_LINE_11, EXINT15_10_IRQn},
{GPIO_PINS_12, EXINT_LINE_12, EXINT15_10_IRQn},
{GPIO_PINS_13, EXINT_LINE_13, EXINT15_10_IRQn},
{GPIO_PINS_14, EXINT_LINE_14, EXINT15_10_IRQn},
{GPIO_PINS_15, EXINT_LINE_15, EXINT15_10_IRQn},
};
#endif
static struct rt_pin_irq_hdr pin_irq_handler_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},
};
static uint32_t pin_irq_enable_mask = 0;
#define ITEM_NUM(items) sizeof(items) / sizeof(items[0])
static rt_base_t at32_pin_get(const char *name)
{
rt_base_t pin = 0;
int hw_port_num, hw_pin_num = 0;
int i, name_len;
name_len = rt_strlen(name);
if ((name_len < 4) || (name_len >= 6))
{
return -RT_EINVAL;
}
if ((name[0] != 'P') || (name[2] != '.'))
{
return -RT_EINVAL;
}
if ((name[1] >= 'A') && (name[1] <= 'Z'))
{
hw_port_num = (int)(name[1] - 'A');
}
else
{
return -RT_EINVAL;
}
for (i = 3; i < name_len; i++)
{
hw_pin_num *= 10;
hw_pin_num += name[i] - '0';
}
pin = PIN_NUM(hw_port_num, hw_pin_num);
return pin;
}
static void at32_pin_write(rt_device_t dev, rt_base_t pin, rt_uint8_t value)
{
gpio_type *gpio_port;
uint16_t gpio_pin;
if (PIN_PORT(pin) < PIN_ATPORT_MAX)
{
gpio_port = PIN_ATPORT(pin);
gpio_pin = PIN_ATPIN(pin);
}
else
{
return;
}
gpio_bits_write(gpio_port, gpio_pin, (confirm_state)value);
}
static rt_int8_t at32_pin_read(rt_device_t dev, rt_base_t pin)
{
gpio_type *gpio_port;
uint16_t gpio_pin;
int value;
value = PIN_LOW;
if (PIN_PORT(pin) < PIN_ATPORT_MAX)
{
gpio_port = PIN_ATPORT(pin);
gpio_pin = PIN_ATPIN(pin);
value = gpio_input_data_bit_read(gpio_port, gpio_pin);
}
return value;
}
static void at32_pin_mode(rt_device_t dev, rt_base_t pin, rt_uint8_t mode)
{
gpio_init_type gpio_init_struct;
gpio_type *gpio_port;
uint16_t gpio_pin;
if (PIN_PORT(pin) < PIN_ATPORT_MAX)
{
gpio_port = PIN_ATPORT(pin);
gpio_pin = PIN_ATPIN(pin);
}
else
{
return;
}
/* configure gpio_init_struct */
gpio_default_para_init(&gpio_init_struct);
gpio_init_struct.gpio_pins = gpio_pin;
gpio_init_struct.gpio_mode = GPIO_MODE_OUTPUT;
gpio_init_struct.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
if (mode == PIN_MODE_OUTPUT)
{
/* output setting */
gpio_init_struct.gpio_mode = GPIO_MODE_OUTPUT;
gpio_init_struct.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
}
else if (mode == PIN_MODE_INPUT)
{
/* input setting: not pull. */
gpio_init_struct.gpio_mode = GPIO_MODE_INPUT;
gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
}
else if (mode == PIN_MODE_INPUT_PULLUP)
{
/* input setting: pull up. */
gpio_init_struct.gpio_mode = GPIO_MODE_INPUT;
gpio_init_struct.gpio_pull = GPIO_PULL_UP;
}
else if (mode == PIN_MODE_INPUT_PULLDOWN)
{
/* input setting: pull down. */
gpio_init_struct.gpio_mode = GPIO_MODE_INPUT;
gpio_init_struct.gpio_pull = GPIO_PULL_DOWN;
}
else if (mode == PIN_MODE_OUTPUT_OD)
{
/* output setting: od. */
gpio_init_struct.gpio_mode = GPIO_MODE_OUTPUT;
gpio_init_struct.gpio_out_type = GPIO_OUTPUT_OPEN_DRAIN;
}
gpio_init(gpio_port, &gpio_init_struct);
}
rt_inline rt_int32_t bit2bitno(rt_uint32_t bit)
{
int i;
for (i = 0; i < 32; i++)
{
if ((0x01 << i) == bit)
{
return i;
}
}
return -1;
}
rt_inline const struct pin_irq_map *get_pin_irq_map(uint32_t pinbit)
{
rt_int32_t mapindex = bit2bitno(pinbit);
if (mapindex < 0 || mapindex >= ITEM_NUM(pin_irq_map))
{
return RT_NULL;
}
return &pin_irq_map[mapindex];
};
static rt_err_t at32_pin_attach_irq(struct rt_device *device, rt_base_t pin,
rt_uint8_t mode, void (*hdr)(void *args), void *args)
{
uint16_t gpio_pin;
rt_base_t level;
rt_int32_t irqindex = -1;
if (PIN_PORT(pin) < PIN_ATPORT_MAX)
{
gpio_pin = PIN_ATPIN(pin);
}
else
{
return -RT_EINVAL;
}
irqindex = bit2bitno(gpio_pin);
if (irqindex < 0 || irqindex >= ITEM_NUM(pin_irq_map))
{
return -RT_EINVAL;
}
level = rt_hw_interrupt_disable();
if (pin_irq_handler_tab[irqindex].pin == pin &&
pin_irq_handler_tab[irqindex].hdr == hdr &&
pin_irq_handler_tab[irqindex].mode == mode &&
pin_irq_handler_tab[irqindex].args == args)
{
rt_hw_interrupt_enable(level);
return RT_EOK;
}
if (pin_irq_handler_tab[irqindex].pin != -1)
{
rt_hw_interrupt_enable(level);
return -RT_EBUSY;
}
pin_irq_handler_tab[irqindex].pin = pin;
pin_irq_handler_tab[irqindex].hdr = hdr;
pin_irq_handler_tab[irqindex].mode = mode;
pin_irq_handler_tab[irqindex].args = args;
rt_hw_interrupt_enable(level);
return RT_EOK;
}
static rt_err_t at32_pin_dettach_irq(struct rt_device *device, rt_base_t pin)
{
uint16_t gpio_pin;
rt_base_t level;
rt_int32_t irqindex = -1;
if (PIN_PORT(pin) < PIN_ATPORT_MAX)
{
gpio_pin = PIN_ATPIN(pin);
}
else
{
return -RT_EINVAL;
}
irqindex = bit2bitno(gpio_pin);
if (irqindex < 0 || irqindex >= ITEM_NUM(pin_irq_map))
{
return -RT_EINVAL;
}
level = rt_hw_interrupt_disable();
if (pin_irq_handler_tab[irqindex].pin == -1)
{
rt_hw_interrupt_enable(level);
return RT_EOK;
}
pin_irq_handler_tab[irqindex].pin = -1;
pin_irq_handler_tab[irqindex].hdr = RT_NULL;
pin_irq_handler_tab[irqindex].mode = 0;
pin_irq_handler_tab[irqindex].args = RT_NULL;
rt_hw_interrupt_enable(level);
return RT_EOK;
}
static rt_err_t at32_pin_irq_enable(struct rt_device *device, rt_base_t pin,
rt_uint8_t enabled)
{
gpio_init_type gpio_init_struct;
exint_init_type exint_init_struct;
gpio_type *gpio_port;
IRQn_Type irqn;
uint16_t gpio_pin;
const struct pin_irq_map *irqmap;
rt_base_t level;
rt_int32_t irqindex = -1;
if (PIN_PORT(pin) < PIN_ATPORT_MAX)
{
gpio_port = PIN_ATPORT(pin);
gpio_pin = PIN_ATPIN(pin);
}
else
{
return -RT_EINVAL;
}
if (enabled == PIN_IRQ_ENABLE)
{
irqindex = bit2bitno(gpio_pin);
if (irqindex < 0 || irqindex >= ITEM_NUM(pin_irq_map))
{
return -RT_EINVAL;
}
level = rt_hw_interrupt_disable();
if (pin_irq_handler_tab[irqindex].pin == -1)
{
rt_hw_interrupt_enable(level);
return -RT_EINVAL;
}
irqmap = &pin_irq_map[irqindex];
/* configure gpio_init_struct */
gpio_default_para_init(&gpio_init_struct);
exint_default_para_init(&exint_init_struct);
gpio_init_struct.gpio_pins = irqmap->pinbit;
gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
exint_init_struct.line_select = irqmap->pinbit;
exint_init_struct.line_mode = EXINT_LINE_INTERRUPUT;
exint_init_struct.line_enable = TRUE;
switch (pin_irq_handler_tab[irqindex].mode)
{
case PIN_IRQ_MODE_RISING:
exint_init_struct.line_polarity = EXINT_TRIGGER_RISING_EDGE;
break;
case PIN_IRQ_MODE_FALLING:
exint_init_struct.line_polarity = EXINT_TRIGGER_FALLING_EDGE;
break;
case PIN_IRQ_MODE_RISING_FALLING:
exint_init_struct.line_polarity = EXINT_TRIGGER_BOTH_EDGE;
break;
}
gpio_init(gpio_port, &gpio_init_struct);
#if defined (SOC_SERIES_AT32F435) || defined (SOC_SERIES_AT32F437) || \
defined (SOC_SERIES_AT32F421) || defined (SOC_SERIES_AT32F425)
scfg_exint_line_config(PIN_ATPORTSOURCE(pin), PIN_ATPINSOURCE(pin));
#else
gpio_exint_line_config(PIN_ATPORTSOURCE(pin), PIN_ATPINSOURCE(pin));
#endif
exint_init(&exint_init_struct);
nvic_irq_enable(irqmap->irqno, 5, 0);
pin_irq_enable_mask |= irqmap->pinbit;
rt_hw_interrupt_enable(level);
}
else if (enabled == PIN_IRQ_DISABLE)
{
irqmap = get_pin_irq_map(gpio_pin);
if (irqmap == RT_NULL)
{
return -RT_EINVAL;
}
level = rt_hw_interrupt_disable();
pin_irq_enable_mask &= ~irqmap->pinbit;
if ((irqmap->pinbit >= GPIO_PINS_5) && (irqmap->pinbit <= GPIO_PINS_9))
{
if (!(pin_irq_enable_mask & (GPIO_PINS_5 | GPIO_PINS_6 | GPIO_PINS_7 | GPIO_PINS_8 | GPIO_PINS_9)))
{
irqn = irqmap->irqno;
}
}
else if ((irqmap->pinbit >= GPIO_PINS_10) && (irqmap->pinbit <= GPIO_PINS_15))
{
if (!(pin_irq_enable_mask & (GPIO_PINS_10 | GPIO_PINS_11 | GPIO_PINS_12 | GPIO_PINS_13 | GPIO_PINS_14 | GPIO_PINS_15)))
{
irqn = irqmap->irqno;
}
}
else
{
irqn = irqmap->irqno;
}
nvic_irq_disable(irqn);
rt_hw_interrupt_enable(level);
}
else
{
return -RT_EINVAL;
}
return RT_EOK;
}
const static struct rt_pin_ops _at32_pin_ops =
{
at32_pin_mode,
at32_pin_write,
at32_pin_read,
at32_pin_attach_irq,
at32_pin_dettach_irq,
at32_pin_irq_enable,
at32_pin_get,
};
rt_inline void pin_irq_handler(int irqno)
{
exint_flag_clear(pin_irq_map[irqno].lineno);
if (pin_irq_handler_tab[irqno].hdr)
{
pin_irq_handler_tab[irqno].hdr(pin_irq_handler_tab[irqno].args);
}
}
void gpio_exint_handler(uint16_t GPIO_Pin)
{
pin_irq_handler(bit2bitno(GPIO_Pin));
}
#if defined (SOC_SERIES_AT32F421) || defined (SOC_SERIES_AT32F425)
void EXINT1_0_IRQHandler(void)
{
rt_interrupt_enter();
if (RESET != exint_flag_get(EXINT_LINE_0))
{
gpio_exint_handler(GPIO_PINS_0);
}
if (RESET != exint_flag_get(EXINT_LINE_1))
{
gpio_exint_handler(GPIO_PINS_1);
}
rt_interrupt_leave();
}
void EXINT3_2_IRQHandler(void)
{
rt_interrupt_enter();
if (RESET != exint_flag_get(EXINT_LINE_2))
{
gpio_exint_handler(GPIO_PINS_2);
}
if (RESET != exint_flag_get(EXINT_LINE_3))
{
gpio_exint_handler(GPIO_PINS_3);
}
rt_interrupt_leave();
}
void EXINT15_4_IRQHandler(void)
{
rt_interrupt_enter();
if (RESET != exint_flag_get(EXINT_LINE_4))
{
gpio_exint_handler(GPIO_PINS_4);
}
if (RESET != exint_flag_get(EXINT_LINE_5))
{
gpio_exint_handler(GPIO_PINS_5);
}
if (RESET != exint_flag_get(EXINT_LINE_6))
{
gpio_exint_handler(GPIO_PINS_6);
}
if (RESET != exint_flag_get(EXINT_LINE_7))
{
gpio_exint_handler(GPIO_PINS_7);
}
if (RESET != exint_flag_get(EXINT_LINE_8))
{
gpio_exint_handler(GPIO_PINS_8);
}
if (RESET != exint_flag_get(EXINT_LINE_9))
{
gpio_exint_handler(GPIO_PINS_9);
}
if (RESET != exint_flag_get(EXINT_LINE_10))
{
gpio_exint_handler(GPIO_PINS_10);
}
if (RESET != exint_flag_get(EXINT_LINE_11))
{
gpio_exint_handler(GPIO_PINS_11);
}
if (RESET != exint_flag_get(EXINT_LINE_12))
{
gpio_exint_handler(GPIO_PINS_12);
}
if (RESET != exint_flag_get(EXINT_LINE_13))
{
gpio_exint_handler(GPIO_PINS_13);
}
if (RESET != exint_flag_get(EXINT_LINE_14))
{
gpio_exint_handler(GPIO_PINS_14);
}
if (RESET != exint_flag_get(EXINT_LINE_15))
{
gpio_exint_handler(GPIO_PINS_15);
}
rt_interrupt_leave();
}
#else
void EXINT0_IRQHandler(void)
{
rt_interrupt_enter();
gpio_exint_handler(GPIO_PINS_0);
rt_interrupt_leave();
}
void EXINT1_IRQHandler(void)
{
rt_interrupt_enter();
gpio_exint_handler(GPIO_PINS_1);
rt_interrupt_leave();
}
void EXINT2_IRQHandler(void)
{
rt_interrupt_enter();
gpio_exint_handler(GPIO_PINS_2);
rt_interrupt_leave();
}
void EXINT3_IRQHandler(void)
{
rt_interrupt_enter();
gpio_exint_handler(GPIO_PINS_3);
rt_interrupt_leave();
}
void EXINT4_IRQHandler(void)
{
rt_interrupt_enter();
gpio_exint_handler(GPIO_PINS_4);
rt_interrupt_leave();
}
void EXINT9_5_IRQHandler(void)
{
rt_interrupt_enter();
if (RESET != exint_flag_get(EXINT_LINE_5))
{
gpio_exint_handler(GPIO_PINS_5);
}
if (RESET != exint_flag_get(EXINT_LINE_6))
{
gpio_exint_handler(GPIO_PINS_6);
}
if (RESET != exint_flag_get(EXINT_LINE_7))
{
gpio_exint_handler(GPIO_PINS_7);
}
if (RESET != exint_flag_get(EXINT_LINE_8))
{
gpio_exint_handler(GPIO_PINS_8);
}
if (RESET != exint_flag_get(EXINT_LINE_9))
{
gpio_exint_handler(GPIO_PINS_9);
}
rt_interrupt_leave();
}
void EXINT15_10_IRQHandler(void)
{
rt_interrupt_enter();
if (RESET != exint_flag_get(EXINT_LINE_10))
{
gpio_exint_handler(GPIO_PINS_10);
}
if (RESET != exint_flag_get(EXINT_LINE_11))
{
gpio_exint_handler(GPIO_PINS_11);
}
if (RESET != exint_flag_get(EXINT_LINE_12))
{
gpio_exint_handler(GPIO_PINS_12);
}
if (RESET != exint_flag_get(EXINT_LINE_13))
{
gpio_exint_handler(GPIO_PINS_13);
}
if (RESET != exint_flag_get(EXINT_LINE_14))
{
gpio_exint_handler(GPIO_PINS_14);
}
if (RESET != exint_flag_get(EXINT_LINE_15))
{
gpio_exint_handler(GPIO_PINS_15);
}
rt_interrupt_leave();
}
#endif
int rt_hw_pin_init(void)
{
#ifdef GPIOA
crm_periph_clock_enable(CRM_GPIOA_PERIPH_CLOCK, TRUE);
#endif
#ifdef GPIOB
crm_periph_clock_enable(CRM_GPIOB_PERIPH_CLOCK, TRUE);
#endif
#ifdef GPIOC
crm_periph_clock_enable(CRM_GPIOC_PERIPH_CLOCK, TRUE);
#endif
#ifdef GPIOD
crm_periph_clock_enable(CRM_GPIOD_PERIPH_CLOCK, TRUE);
#endif
#ifdef GPIOE
crm_periph_clock_enable(CRM_GPIOE_PERIPH_CLOCK, TRUE);
#endif
#ifdef GPIOF
crm_periph_clock_enable(CRM_GPIOF_PERIPH_CLOCK, TRUE);
#endif
#ifdef GPIOG
crm_periph_clock_enable(CRM_GPIOG_PERIPH_CLOCK, TRUE);
#endif
#ifdef GPIOH
crm_periph_clock_enable(CRM_GPIOH_PERIPH_CLOCK, TRUE);
#endif
#if defined (SOC_SERIES_AT32F435) || defined (SOC_SERIES_AT32F437) || \
defined (SOC_SERIES_AT32F421) || defined (SOC_SERIES_AT32F425)
crm_periph_clock_enable(CRM_SCFG_PERIPH_CLOCK, TRUE);
#else
crm_periph_clock_enable(CRM_IOMUX_PERIPH_CLOCK, TRUE);
#endif
return rt_device_pin_register("pin", &_at32_pin_ops, RT_NULL);
}
INIT_BOARD_EXPORT(rt_hw_pin_init);
#endif /* RT_USING_PIN */
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