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rt-thread-official/bsp/mm32l3xx/drivers/drv_gpio.c

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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2019-04-02 henryhuang the first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <board.h>
#include <rthw.h>
#define MM32_PIN(index, rcc, gpio, gpio_index) { 0, RCC_##rcc##Periph_GPIO##gpio, GPIO##gpio, GPIO_Pin_##gpio_index, GPIO_PortSourceGPIO##gpio, GPIO_PinSource##gpio_index}
#define MM32_PIN_DEFAULT {-1, 0, 0, 0, 0, 0}
/* MM32 GPIO driver */
struct pin_index
{
int index;
uint32_t rcc;
GPIO_TypeDef *gpio;
uint32_t pin;
uint8_t port_source;
uint8_t pin_source;
};
static const struct pin_index mm32_pin_map[] =
{
MM32_PIN_DEFAULT,
MM32_PIN_DEFAULT,
MM32_PIN(2, APB2, C, 13),
MM32_PIN(3, APB2, C, 14),
MM32_PIN(4, APB2, C, 15),
MM32_PIN_DEFAULT,
MM32_PIN_DEFAULT,
MM32_PIN_DEFAULT,
MM32_PIN_DEFAULT,
MM32_PIN_DEFAULT,
MM32_PIN(10, APB2, A, 0),
MM32_PIN(11, APB2, A, 1),
MM32_PIN(12, APB2, A, 2),
MM32_PIN(13, APB2, A, 3),
MM32_PIN(14, APB2, A, 4),
MM32_PIN(15, APB2, A, 5),
MM32_PIN(16, APB2, A, 6),
MM32_PIN(17, APB2, A, 7),
MM32_PIN(18, APB2, B, 0),
MM32_PIN(19, APB2, B, 1),
MM32_PIN(20, APB2, B, 2),
MM32_PIN(21, APB2, B, 10),
MM32_PIN(22, APB2, B, 11),
MM32_PIN_DEFAULT,
MM32_PIN_DEFAULT,
MM32_PIN(25, APB2, B, 12),
MM32_PIN(26, APB2, B, 13),
MM32_PIN(27, APB2, B, 14),
MM32_PIN(28, APB2, B, 15),
MM32_PIN(29, APB2, A, 8),
MM32_PIN(30, APB2, A, 9),
MM32_PIN(31, APB2, A, 10),
MM32_PIN(32, APB2, A, 11),
MM32_PIN(33, APB2, A, 12),
MM32_PIN(34, APB2, A, 13),
MM32_PIN_DEFAULT,
MM32_PIN_DEFAULT,
MM32_PIN(37, APB2, A, 14),
MM32_PIN(38, APB2, A, 15),
MM32_PIN(39, APB2, B, 3),
MM32_PIN(40, APB2, B, 4),
MM32_PIN(41, APB2, B, 5),
MM32_PIN(42, APB2, B, 6),
MM32_PIN(43, APB2, B, 7),
MM32_PIN_DEFAULT,
MM32_PIN(45, APB2, B, 8),
MM32_PIN(46, APB2, B, 9),
MM32_PIN_DEFAULT,
MM32_PIN_DEFAULT,
};
struct pin_irq_map
{
rt_uint16_t pinbit;
rt_uint32_t irqbit;
enum IRQn irqno;
};
const struct pin_irq_map mm32_pin_irq_map[] =
{
{GPIO_Pin_0, EXTI_Line0, EXTI0_IRQn },
{GPIO_Pin_1, EXTI_Line1, EXTI1_IRQn },
{GPIO_Pin_2, EXTI_Line2, EXTI2_IRQn },
{GPIO_Pin_3, EXTI_Line3, EXTI3_IRQn },
{GPIO_Pin_4, EXTI_Line4, EXTI4_IRQn },
{GPIO_Pin_5, EXTI_Line5, EXTI9_5_IRQn },
{GPIO_Pin_6, EXTI_Line6, EXTI9_5_IRQn },
{GPIO_Pin_7, EXTI_Line7, EXTI9_5_IRQn },
{GPIO_Pin_8, EXTI_Line8, EXTI9_5_IRQn },
{GPIO_Pin_9, EXTI_Line9, EXTI9_5_IRQn },
{GPIO_Pin_10, EXTI_Line10, EXTI15_10_IRQn},
{GPIO_Pin_11, EXTI_Line11, EXTI15_10_IRQn},
{GPIO_Pin_12, EXTI_Line12, EXTI15_10_IRQn},
{GPIO_Pin_13, EXTI_Line13, EXTI15_10_IRQn},
{GPIO_Pin_14, EXTI_Line14, EXTI15_10_IRQn},
{GPIO_Pin_15, EXTI_Line15, EXTI15_10_IRQn},
};
struct rt_pin_irq_hdr mm32_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])
const struct pin_index *get_pin(uint8_t pin)
{
const struct pin_index *index;
if (pin < ITEM_NUM(mm32_pin_map))
{
index = &mm32_pin_map[pin];
if (index->gpio == 0)
index = RT_NULL;
}
else
{
index = RT_NULL;
}
return index;
};
void mm32_pin_write(rt_device_t dev, rt_base_t pin, rt_base_t value)
{
const struct pin_index *index;
index = get_pin(pin);
if (index == RT_NULL)
{
return;
}
if (value == PIN_LOW)
{
GPIO_ResetBits(index->gpio, index->pin);
}
else
{
GPIO_SetBits(index->gpio, index->pin);
}
}
int mm32_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 PIN_LOW;
}
if (GPIO_ReadInputDataBit(index->gpio, index->pin) == Bit_RESET)
{
value = PIN_LOW;
}
else
{
value = PIN_HIGH;
}
return value;
}
void mm32_pin_mode(rt_device_t dev, rt_base_t pin, rt_base_t mode)
{
const struct pin_index *index;
GPIO_InitTypeDef GPIO_InitStructure;
index = get_pin(pin);
if (index == RT_NULL)
{
return;
}
/* GPIO Periph clock enable */
RCC_APB2PeriphClockCmd(index->rcc, ENABLE);
/* Configure GPIO_InitStructure */
GPIO_InitStructure.GPIO_Pin = index->pin;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
if (mode == PIN_MODE_OUTPUT)
{
/* output setting */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
}
else if (mode == PIN_MODE_OUTPUT_OD)
{
/* output setting: od. */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;
}
else if (mode == PIN_MODE_INPUT)
{
/* input setting: not pull. */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
}
else if (mode == PIN_MODE_INPUT_PULLUP)
{
/* input setting: pull up. */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
}
else
{
/* input setting:default. */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
}
GPIO_Init( index->gpio, &GPIO_InitStructure);
}
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(mm32_pin_irq_map))
{
return RT_NULL;
}
return &mm32_pin_irq_map[mapindex];
};
rt_err_t mm32_pin_attach_irq(struct rt_device *device, rt_int32_t pin,
rt_uint32_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 = bit2bitno(index->pin);
if (irqindex < 0 || irqindex >= ITEM_NUM(mm32_pin_irq_map))
{
return -RT_ENOSYS;
}
level = rt_hw_interrupt_disable();
if (mm32_pin_irq_hdr_tab[irqindex].pin == pin &&
mm32_pin_irq_hdr_tab[irqindex].hdr == hdr &&
mm32_pin_irq_hdr_tab[irqindex].mode == mode &&
mm32_pin_irq_hdr_tab[irqindex].args == args
)
{
rt_hw_interrupt_enable(level);
return RT_EOK;
}
if (mm32_pin_irq_hdr_tab[irqindex].pin != -1)
{
rt_hw_interrupt_enable(level);
return -RT_EBUSY;
}
mm32_pin_irq_hdr_tab[irqindex].pin = pin;
mm32_pin_irq_hdr_tab[irqindex].hdr = hdr;
mm32_pin_irq_hdr_tab[irqindex].mode = mode;
mm32_pin_irq_hdr_tab[irqindex].args = args;
rt_hw_interrupt_enable(level);
return RT_EOK;
}
rt_err_t mm32_pin_detach_irq(struct rt_device *device, rt_int32_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 = bit2bitno(index->pin);
if (irqindex < 0 || irqindex >= ITEM_NUM(mm32_pin_irq_map))
{
return RT_ENOSYS;
}
level = rt_hw_interrupt_disable();
if (mm32_pin_irq_hdr_tab[irqindex].pin == -1)
{
rt_hw_interrupt_enable(level);
return RT_EOK;
}
mm32_pin_irq_hdr_tab[irqindex].pin = -1;
mm32_pin_irq_hdr_tab[irqindex].hdr = RT_NULL;
mm32_pin_irq_hdr_tab[irqindex].mode = 0;
mm32_pin_irq_hdr_tab[irqindex].args = RT_NULL;
rt_hw_interrupt_enable(level);
return RT_EOK;
}
rt_err_t mm32_pin_irq_enable(struct rt_device *device, rt_base_t pin,
rt_uint32_t enabled)
{
const struct pin_index *index;
const struct pin_irq_map *irqmap;
rt_base_t level;
rt_int32_t irqindex = -1;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
index = get_pin(pin);
if (index == RT_NULL)
{
return -RT_ENOSYS;
}
if (enabled == PIN_IRQ_ENABLE)
{
irqindex = bit2bitno(index->pin);
if (irqindex < 0 || irqindex >= ITEM_NUM(mm32_pin_irq_map))
{
return -RT_ENOSYS;
}
level = rt_hw_interrupt_disable();
if (mm32_pin_irq_hdr_tab[irqindex].pin == -1)
{
rt_hw_interrupt_enable(level);
return -RT_ENOSYS;
}
irqmap = &mm32_pin_irq_map[irqindex];
/* GPIO Periph clock enable */
RCC_APB2PeriphClockCmd(index->rcc, ENABLE);
/* Configure GPIO_InitStructure */
GPIO_InitStructure.GPIO_Pin = index->pin;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(index->gpio, &GPIO_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = irqmap->irqno;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
GPIO_EXTILineConfig(index->port_source, index->pin_source);
EXTI_InitStructure.EXTI_Line = irqmap->irqbit;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
switch (mm32_pin_irq_hdr_tab[irqindex].mode)
{
case PIN_IRQ_MODE_RISING:
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
break;
case PIN_IRQ_MODE_FALLING:
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
break;
case PIN_IRQ_MODE_RISING_FALLING:
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
break;
}
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
rt_hw_interrupt_enable(level);
}
else if (enabled == PIN_IRQ_DISABLE)
{
irqmap = get_pin_irq_map(index->pin);
if (irqmap == RT_NULL)
{
return -RT_ENOSYS;
}
EXTI_InitStructure.EXTI_Line = irqmap->irqbit;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = DISABLE;
EXTI_Init(&EXTI_InitStructure);
}
else
{
return -RT_ENOSYS;
}
return RT_EOK;
}
const static struct rt_pin_ops _mm32_pin_ops =
{
mm32_pin_mode,
mm32_pin_write,
mm32_pin_read,
mm32_pin_attach_irq,
mm32_pin_detach_irq,
mm32_pin_irq_enable,
RT_NULL,
};
int rt_hw_pin_init(void)
{
int result;
result = rt_device_pin_register("pin", &_mm32_pin_ops, RT_NULL);
return result;
}
INIT_BOARD_EXPORT(rt_hw_pin_init);
rt_inline void pin_irq_hdr(int irqno)
{
EXTI_ClearITPendingBit(mm32_pin_irq_map[irqno].irqbit);
if (mm32_pin_irq_hdr_tab[irqno].hdr)
{
mm32_pin_irq_hdr_tab[irqno].hdr(mm32_pin_irq_hdr_tab[irqno].args);
}
}
void EXTI0_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
pin_irq_hdr(0);
/* leave interrupt */
rt_interrupt_leave();
}
void EXTI1_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
pin_irq_hdr(1);
/* leave interrupt */
rt_interrupt_leave();
}
void EXTI2_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
pin_irq_hdr(2);
/* leave interrupt */
rt_interrupt_leave();
}
void EXTI3_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
pin_irq_hdr(3);
/* leave interrupt */
rt_interrupt_leave();
}
void EXTI4_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
pin_irq_hdr(4);
/* leave interrupt */
rt_interrupt_leave();
}
void EXTI9_5_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
if (EXTI_GetITStatus(EXTI_Line5) != RESET)
{
pin_irq_hdr(5);
}
if (EXTI_GetITStatus(EXTI_Line6) != RESET)
{
pin_irq_hdr(6);
}
if (EXTI_GetITStatus(EXTI_Line7) != RESET)
{
pin_irq_hdr(7);
}
if (EXTI_GetITStatus(EXTI_Line8) != RESET)
{
pin_irq_hdr(8);
}
if (EXTI_GetITStatus(EXTI_Line9) != RESET)
{
pin_irq_hdr(9);
}
/* leave interrupt */
rt_interrupt_leave();
}
void EXTI15_10_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
if (EXTI_GetITStatus(EXTI_Line10) != RESET)
{
pin_irq_hdr(10);
}
if (EXTI_GetITStatus(EXTI_Line11) != RESET)
{
pin_irq_hdr(11);
}
if (EXTI_GetITStatus(EXTI_Line12) != RESET)
{
pin_irq_hdr(12);
}
if (EXTI_GetITStatus(EXTI_Line13) != RESET)
{
pin_irq_hdr(13);
}
if (EXTI_GetITStatus(EXTI_Line14) != RESET)
{
pin_irq_hdr(14);
}
if (EXTI_GetITStatus(EXTI_Line15) != RESET)
{
pin_irq_hdr(15);
}
/* leave interrupt */
rt_interrupt_leave();
}
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