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rt-thread-official/bsp/acm32/acm32f4xx-nucleo/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
* 2021-09-18 AisinoChip first version
*/
#include <rthw.h>
#include <rtdevice.h>
#include "board.h"
#ifdef RT_USING_PIN
#define __ACM32_PIN(index, gpio, gpio_index) \
{ \
index, GPIO##gpio, GPIO_PIN_##gpio_index \
}
#define __ACM32_PIN_RESERVE \
{ \
-1, 0, 0 \
}
/* ACM32 GPIO driver */
struct pin_index
{
int index;
enum_GPIOx_t gpio;
uint32_t pin;
};
struct pin_irq_map
{
rt_uint16_t line;
EXTI_HandleTypeDef handle;
};
static const struct pin_index pins[] =
{
#if defined(BSP_USING_GPIO1)
__ACM32_PIN(0, A, 0),
__ACM32_PIN(1, A, 1),
__ACM32_PIN(2, A, 2),
__ACM32_PIN(3, A, 3),
__ACM32_PIN(4, A, 4),
__ACM32_PIN(5, A, 5),
__ACM32_PIN(6, A, 6),
__ACM32_PIN(7, A, 7),
__ACM32_PIN(8, A, 8),
__ACM32_PIN(9, A, 9),
__ACM32_PIN(10, A, 10),
__ACM32_PIN(11, A, 11),
__ACM32_PIN(12, A, 12),
__ACM32_PIN(13, A, 13),
__ACM32_PIN(14, A, 14),
__ACM32_PIN(15, A, 15),
__ACM32_PIN(16, B, 0),
__ACM32_PIN(17, B, 1),
__ACM32_PIN(18, B, 2),
__ACM32_PIN(19, B, 3),
__ACM32_PIN(20, B, 4),
__ACM32_PIN(21, B, 5),
__ACM32_PIN(22, B, 6),
__ACM32_PIN(23, B, 7),
__ACM32_PIN(24, B, 8),
__ACM32_PIN(25, B, 9),
__ACM32_PIN(26, B, 10),
__ACM32_PIN(27, B, 11),
__ACM32_PIN(28, B, 12),
__ACM32_PIN(29, B, 13),
__ACM32_PIN(30, B, 14),
__ACM32_PIN(31, B, 15),
#if defined(BSP_USING_GPIO2)
__ACM32_PIN(32, C, 0),
__ACM32_PIN(33, C, 1),
__ACM32_PIN(34, C, 2),
__ACM32_PIN(35, C, 3),
__ACM32_PIN(36, C, 4),
__ACM32_PIN(37, C, 5),
__ACM32_PIN(38, C, 6),
__ACM32_PIN(39, C, 7),
__ACM32_PIN(40, C, 8),
__ACM32_PIN(41, C, 9),
__ACM32_PIN(42, C, 10),
__ACM32_PIN(43, C, 11),
__ACM32_PIN(44, C, 12),
__ACM32_PIN(45, C, 13),
__ACM32_PIN(46, C, 14),
__ACM32_PIN(47, C, 15),
__ACM32_PIN(48, D, 0),
__ACM32_PIN(49, D, 1),
__ACM32_PIN(50, D, 2),
__ACM32_PIN(51, D, 3),
__ACM32_PIN(52, D, 4),
__ACM32_PIN(53, D, 5),
__ACM32_PIN(54, D, 6),
__ACM32_PIN(55, D, 7),
__ACM32_PIN(56, D, 8),
__ACM32_PIN(57, D, 9),
__ACM32_PIN(58, D, 10),
__ACM32_PIN(59, D, 11),
__ACM32_PIN(60, D, 12),
__ACM32_PIN(61, D, 13),
__ACM32_PIN(62, D, 14),
__ACM32_PIN(63, D, 15),
#if defined(BSP_USING_GPIO3)
__ACM32_PIN(64, E, 0),
__ACM32_PIN(65, E, 1),
__ACM32_PIN(66, E, 2),
__ACM32_PIN(67, E, 3),
__ACM32_PIN(68, E, 4),
__ACM32_PIN(69, E, 5),
__ACM32_PIN(70, E, 6),
__ACM32_PIN(71, E, 7),
__ACM32_PIN(72, E, 8),
__ACM32_PIN(73, E, 9),
__ACM32_PIN(74, E, 10),
__ACM32_PIN(75, E, 11),
__ACM32_PIN(76, E, 12),
__ACM32_PIN(77, E, 13),
__ACM32_PIN(78, E, 14),
__ACM32_PIN(79, E, 15),
__ACM32_PIN(80, F, 0),
__ACM32_PIN(81, F, 1),
__ACM32_PIN(82, F, 2),
__ACM32_PIN(83, F, 3),
__ACM32_PIN(84, F, 4),
#endif /* defined(BSP_USING_GPIO3) */
#endif /* defined(BSP_USING_GPIO2) */
#endif /* defined(BSP_USING_GPIO1) */
};
static struct pin_irq_map pin_irq_map[] =
{
{EXTI_LINE_0, {0}},
{EXTI_LINE_1, {0}},
{EXTI_LINE_2, {0}},
{EXTI_LINE_3, {0}},
{EXTI_LINE_4, {0}},
{EXTI_LINE_5, {0}},
{EXTI_LINE_6, {0}},
{EXTI_LINE_7, {0}},
{EXTI_LINE_8, {0}},
{EXTI_LINE_9, {0}},
{EXTI_LINE_10, {0}},
{EXTI_LINE_11, {0}},
{EXTI_LINE_12, {0}},
{EXTI_LINE_13, {0}},
{EXTI_LINE_14, {0}},
{EXTI_LINE_15, {0}},
};
static 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},
};
static uint32_t pin_irq_enable_mask = 0;
#define ITEM_NUM(items) sizeof(items) / sizeof(items[0])
static const struct pin_index *get_pin(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;
};
static void _pin_write(rt_device_t dev, rt_base_t pin, rt_uint8_t value)
{
const struct pin_index *index;
index = get_pin(pin);
if (index == RT_NULL)
{
return;
}
HAL_GPIO_WritePin(index->gpio, index->pin, (enum_PinState_t)value);
}
static rt_ssize_t _pin_read(rt_device_t dev, rt_base_t pin)
{
int value;
const struct pin_index *index;
value = PIN_LOW;
index = get_pin(pin);
if (index == RT_NULL)
{
return -RT_EINVAL;
}
value = HAL_GPIO_ReadPin(index->gpio, index->pin);
return value;
}
static void _pin_mode(rt_device_t dev, rt_base_t pin, rt_uint8_t mode)
{
const struct pin_index *index;
GPIO_InitTypeDef GPIO_InitStruct;
index = get_pin(pin);
if (index == RT_NULL)
{
return;
}
/* Configure GPIO_InitStructure */
GPIO_InitStruct.Pin = index->pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Alternate = GPIO_FUNCTION_0;
if (mode == PIN_MODE_OUTPUT)
{
/* output setting */
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
}
else if (mode == PIN_MODE_INPUT)
{
/* input setting: not pull. */
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_NOPULL;
}
else if (mode == PIN_MODE_INPUT_PULLUP)
{
/* input setting: pull up. */
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLUP;
}
else if (mode == PIN_MODE_INPUT_PULLDOWN)
{
/* input setting: pull down. */
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLDOWN;
}
else if (mode == PIN_MODE_OUTPUT_OD)
{
/* output setting: od. */
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_OD;
GPIO_InitStruct.Pull = GPIO_NOPULL;
}
/* special PIN process */
__HAL_RTC_PC13_DIGIT();
HAL_GPIO_Init(index->gpio, &GPIO_InitStruct);
}
#define PIN2INDEX(pin) ((pin) % 16)
static rt_err_t _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_base_t level;
rt_int32_t irqindex = -1;
index = get_pin(pin);
if (index == RT_NULL)
{
return -RT_ENOSYS;
}
irqindex = PIN2INDEX(pin);
level = rt_hw_interrupt_disable();
if (pin_irq_hdr_tab[irqindex].pin == pin &&
pin_irq_hdr_tab[irqindex].hdr == hdr &&
pin_irq_hdr_tab[irqindex].mode == mode &&
pin_irq_hdr_tab[irqindex].args == args)
{
rt_hw_interrupt_enable(level);
return RT_EOK;
}
if (pin_irq_hdr_tab[irqindex].pin != -1)
{
rt_hw_interrupt_enable(level);
return -RT_EBUSY;
}
pin_irq_hdr_tab[irqindex].pin = pin;
pin_irq_hdr_tab[irqindex].hdr = hdr;
pin_irq_hdr_tab[irqindex].mode = mode;
pin_irq_hdr_tab[irqindex].args = args;
rt_hw_interrupt_enable(level);
return RT_EOK;
}
static rt_err_t _pin_dettach_irq(struct rt_device *device, rt_base_t pin)
{
const struct pin_index *index;
rt_base_t level;
rt_int32_t irqindex = -1;
index = get_pin(pin);
if (index == RT_NULL)
{
return -RT_ENOSYS;
}
irqindex = PIN2INDEX(pin);
level = rt_hw_interrupt_disable();
if (pin_irq_hdr_tab[irqindex].pin == -1)
{
rt_hw_interrupt_enable(level);
return RT_EOK;
}
pin_irq_hdr_tab[irqindex].pin = -1;
pin_irq_hdr_tab[irqindex].hdr = RT_NULL;
pin_irq_hdr_tab[irqindex].mode = 0;
pin_irq_hdr_tab[irqindex].args = RT_NULL;
rt_hw_interrupt_enable(level);
return RT_EOK;
}
static rt_err_t _pin_irq_enable(struct rt_device *device, rt_base_t pin,
rt_uint8_t enabled)
{
const struct pin_index *index;
struct pin_irq_map *irqmap;
rt_base_t level;
rt_int32_t irqindex = -1;
GPIO_InitTypeDef GPIO_InitStruct;
index = get_pin(pin);
if (index == RT_NULL)
{
return -RT_ENOSYS;
}
irqindex = PIN2INDEX(pin);
irqmap = &pin_irq_map[irqindex];
if (enabled == PIN_IRQ_ENABLE)
{
level = rt_hw_interrupt_disable();
if (pin_irq_hdr_tab[irqindex].pin == -1)
{
rt_hw_interrupt_enable(level);
return -RT_ENOSYS;
}
/* Configure GPIO_InitStructure */
GPIO_InitStruct.Pin = index->pin;
GPIO_InitStruct.Alternate = GPIO_FUNCTION_0;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
irqmap->handle.u32_Line = irqmap->line;
irqmap->handle.u32_Mode = EXTI_MODE_INTERRUPT;
switch (pin_irq_hdr_tab[irqindex].mode)
{
case PIN_IRQ_MODE_RISING:
GPIO_InitStruct.Pull = GPIO_PULLDOWN;
irqmap->handle.u32_Trigger = EXTI_TRIGGER_RISING;
break;
case PIN_IRQ_MODE_FALLING:
GPIO_InitStruct.Pull = GPIO_PULLUP;
irqmap->handle.u32_Trigger = EXTI_TRIGGER_FALLING;
break;
case PIN_IRQ_MODE_RISING_FALLING:
GPIO_InitStruct.Pull = GPIO_NOPULL;
irqmap->handle.u32_Trigger = EXTI_TRIGGER_RISING_FALLING;
break;
}
HAL_GPIO_Init(index->gpio, &GPIO_InitStruct);
irqmap->handle.u32_GPIOSel = pin / 16;
HAL_EXTI_SetConfigLine(&irqmap->handle);
pin_irq_enable_mask |= 1 << irqindex;
rt_hw_interrupt_enable(level);
}
else if (enabled == PIN_IRQ_DISABLE)
{
if ((pin_irq_enable_mask & (1 << irqindex)) == 0)
{
return -RT_ENOSYS;
}
level = rt_hw_interrupt_disable();
EXTI->IENR &= ~irqmap->line;
EXTI->EENR &= ~irqmap->line;
rt_hw_interrupt_enable(level);
}
else
{
return -RT_ENOSYS;
}
return RT_EOK;
}
const static struct rt_pin_ops _acm32_pin_ops =
{
_pin_mode,
_pin_write,
_pin_read,
_pin_attach_irq,
_pin_dettach_irq,
_pin_irq_enable,
};
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);
}
}
int rt_hw_pin_init(void)
{
return rt_device_pin_register("pin", &_acm32_pin_ops, RT_NULL);
}
INIT_BOARD_EXPORT(rt_hw_pin_init);
void EXTI_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
for (int i = 0; i < 16; i++)
{
if (EXTI->PDR & pin_irq_map[i].line)
{
EXTI->PDR = pin_irq_map[i].line;
pin_irq_hdr(i);
break;
}
}
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* RT_USING_PIN */
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