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rt-thread/bsp/gd32/risc-v/libraries/gd32_drivers/drv_gpio.c

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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-08-20 BruceOu the first version
*/
#include <rtdevice.h>
#include <rthw.h>
#include <rtconfig.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(39, 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
};
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},
};
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;
}
/**
* @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;
index = get_pin(pin);
if (index == RT_NULL)
{
return;
}
/* GPIO Periph clock enable */
rcu_periph_clock_enable(index->clk);
pin_mode = GPIO_MODE_OUT_PP;
switch(mode)
{
case PIN_MODE_OUTPUT:
/* output setting */
pin_mode = GPIO_MODE_OUT_PP;
break;
case PIN_MODE_OUTPUT_OD:
/* output setting: od. */
pin_mode = GPIO_MODE_OUT_OD;
break;
case PIN_MODE_INPUT:
/* input setting: not pull. */
pin_mode = GPIO_MODE_IN_FLOATING;
break;
case PIN_MODE_INPUT_PULLUP:
/* input setting: pull up. */
pin_mode = GPIO_MODE_IPU;
break;
case PIN_MODE_INPUT_PULLDOWN:
/* input setting: pull down. */
pin_mode = GPIO_MODE_IPD;
break;
default:
break;
}
gpio_init(index->gpio_periph, pin_mode, GPIO_OSPEED_50MHZ, index->pin);
}
/**
* @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_int8_t gd32_pin_read(rt_device_t dev, rt_base_t pin)
{
rt_int8_t value = PIN_LOW;
const struct pin_index *index = RT_NULL;
index = get_pin(pin);
if (index == RT_NULL)
{
return value;
}
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;
}
rcu_periph_clock_enable(RCU_AF);
/* enable and set interrupt priority */
eclic_irq_enable(irqmap->irqno, 5U, 0U);
/* connect EXTI line to GPIO pin */
gpio_exti_source_select(index->port_src, index->pin_src);
/* configure EXTI line */
exti_init((exti_line_enum)(index->pin), EXTI_INTERRUPT, trigger_mode);
exti_interrupt_flag_clear((exti_line_enum)(index->pin));
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;
}
eclic_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(RESET != exti_interrupt_flag_get((exti_line_enum)(1 << exti_line)))
{
pin_irq_hdr(exti_line);
exti_interrupt_flag_clear((exti_line_enum)(1 << exti_line));
}
}
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();
}
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
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