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rt-thread-official/bsp/apm32/libraries/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
* 2020-08-20 Abbcc first version
*/
#include <board.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))
#define PIN_APMPORT(pin) ((GPIO_T *)(GPIOA_BASE + (0x400u * PIN_PORT(pin))))
#define PIN_APMPIN(pin) ((uint16_t)(1u << PIN_NO(pin)))
#if defined(GPIOZ)
#define __APM32_PORT_MAX 12u
#elif defined(GPIOK)
#define __APM32_PORT_MAX 11u
#elif defined(GPIOJ)
#define __APM32_PORT_MAX 10u
#elif defined(GPIOI)
#define __APM32_PORT_MAX 9u
#elif defined(GPIOH)
#define __APM32_PORT_MAX 8u
#elif defined(GPIOG)
#define __APM32_PORT_MAX 7u
#elif defined(GPIOF)
#define __APM32_PORT_MAX 6u
#elif defined(GPIOE)
#define __APM32_PORT_MAX 5u
#elif defined(GPIOD)
#define __APM32_PORT_MAX 4u
#elif defined(GPIOC)
#define __APM32_PORT_MAX 3u
#elif defined(GPIOB)
#define __APM32_PORT_MAX 2u
#elif defined(GPIOA)
#define __APM32_PORT_MAX 1u
#else
#define __APM32_PORT_MAX 0u
#error Unsupported APM32 GPIO peripheral.
#endif
#define PIN_APMPORT_MAX __APM32_PORT_MAX
static const struct pin_irq_map pin_irq_map[] =
{
{GPIO_PIN_0, EINT0_IRQn},
{GPIO_PIN_1, EINT1_IRQn},
{GPIO_PIN_2, EINT2_IRQn},
{GPIO_PIN_3, EINT3_IRQn},
{GPIO_PIN_4, EINT4_IRQn},
{GPIO_PIN_5, EINT9_5_IRQn},
{GPIO_PIN_6, EINT9_5_IRQn},
{GPIO_PIN_7, EINT9_5_IRQn},
{GPIO_PIN_8, EINT9_5_IRQn},
{GPIO_PIN_9, EINT9_5_IRQn},
{GPIO_PIN_10, EINT15_10_IRQn},
{GPIO_PIN_11, EINT15_10_IRQn},
{GPIO_PIN_12, EINT15_10_IRQn},
{GPIO_PIN_13, EINT15_10_IRQn},
{GPIO_PIN_14, EINT15_10_IRQn},
{GPIO_PIN_15, EINT15_10_IRQn},
};
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 rt_base_t _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 _pin_write(rt_device_t dev, rt_base_t pin, rt_base_t value)
{
GPIO_T *gpio_port;
uint16_t gpio_pin;
if (PIN_PORT(pin) < PIN_APMPORT_MAX)
{
gpio_port = PIN_APMPORT(pin);
gpio_pin = PIN_APMPIN(pin);
GPIO_WriteBitValue(gpio_port, gpio_pin, (uint8_t)value);
}
}
static int _pin_read(rt_device_t dev, rt_base_t pin)
{
GPIO_T *gpio_port;
uint16_t gpio_pin;
int value = PIN_LOW;
if (PIN_PORT(pin) < PIN_APMPORT_MAX)
{
gpio_port = PIN_APMPORT(pin);
gpio_pin = PIN_APMPIN(pin);
value = GPIO_ReadInputBit(gpio_port, gpio_pin);
}
return value;
}
static void _pin_mode(rt_device_t dev, rt_base_t pin, rt_base_t mode)
{
GPIO_Config_T gpioConfig;
if (PIN_PORT(pin) >= PIN_APMPORT_MAX)
{
return;
}
/* Configure gpioConfigure */
gpioConfig.pin = PIN_APMPIN(pin);
gpioConfig.mode = GPIO_MODE_OUT_PP;
gpioConfig.speed = GPIO_SPEED_50MHz;
if (mode == PIN_MODE_OUTPUT)
{
/* output setting */
gpioConfig.mode = GPIO_MODE_OUT_PP;
}
else if (mode == PIN_MODE_INPUT)
{
/* input setting: not pull. */
gpioConfig.mode = GPIO_MODE_IN_PU;
}
else if (mode == PIN_MODE_INPUT_PULLUP)
{
/* input setting: pull up. */
gpioConfig.mode = GPIO_MODE_IN_PU;
}
else if (mode == PIN_MODE_INPUT_PULLDOWN)
{
/* input setting: pull down. */
gpioConfig.mode = GPIO_MODE_IN_PD;
}
else if (mode == PIN_MODE_OUTPUT_OD)
{
/* output setting: od. */
gpioConfig.mode = GPIO_MODE_OUT_OD;
}
GPIO_Config(PIN_APMPORT(pin), &gpioConfig);
}
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 _pin_attach_irq(struct rt_device *device, rt_int32_t pin,
rt_uint32_t mode, void (*hdr)(void *args), void *args)
{
rt_base_t level;
rt_int32_t irqindex = -1;
if (PIN_PORT(pin) >= PIN_APMPORT_MAX)
{
return -RT_ENOSYS;
}
irqindex = bit2bitno(PIN_APMPIN(pin));
if (irqindex < 0 || irqindex >= ITEM_NUM(pin_irq_map))
{
return RT_ENOSYS;
}
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_int32_t pin)
{
rt_base_t level;
rt_int32_t irqindex = -1;
if (PIN_PORT(pin) >= PIN_APMPORT_MAX)
{
return -RT_ENOSYS;
}
irqindex = bit2bitno(PIN_APMPIN(pin));
if (irqindex < 0 || irqindex >= ITEM_NUM(pin_irq_map))
{
return RT_ENOSYS;
}
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_uint32_t enabled)
{
const struct pin_irq_map *irqmap;
rt_base_t level;
rt_int32_t irqindex = -1;
GPIO_Config_T gpioConfig;
if (PIN_PORT(pin) >= PIN_APMPORT_MAX)
{
return -RT_ENOSYS;
}
if (enabled == PIN_IRQ_ENABLE)
{
irqindex = bit2bitno(PIN_APMPIN(pin));
if (irqindex < 0 || irqindex >= ITEM_NUM(pin_irq_map))
{
return RT_ENOSYS;
}
level = rt_hw_interrupt_disable();
if (pin_irq_hdr_tab[irqindex].pin == -1)
{
rt_hw_interrupt_enable(level);
return RT_ENOSYS;
}
irqmap = &pin_irq_map[irqindex];
/* Configure gpioConfigure */
gpioConfig.pin = PIN_APMPIN(pin);
gpioConfig.speed = GPIO_SPEED_50MHz;
switch (pin_irq_hdr_tab[irqindex].mode)
{
case PIN_IRQ_MODE_RISING:
gpioConfig.mode = GPIO_MODE_IN_PD;
break;
case PIN_IRQ_MODE_FALLING:
gpioConfig.mode = GPIO_MODE_IN_PU;
break;
case PIN_IRQ_MODE_RISING_FALLING:
gpioConfig.mode = GPIO_MODE_IN_FLOATING;
break;
}
GPIO_Config(PIN_APMPORT(pin), &gpioConfig);
NVIC_EnableIRQRequest(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(PIN_APMPIN(pin));
if (irqmap == RT_NULL)
{
return RT_ENOSYS;
}
level = rt_hw_interrupt_disable();
pin_irq_enable_mask &= ~irqmap->pinbit;
if ((irqmap->pinbit >= GPIO_PIN_5) && (irqmap->pinbit <= GPIO_PIN_9))
{
if (!(pin_irq_enable_mask & (GPIO_PIN_5 | GPIO_PIN_6 | GPIO_PIN_7 | GPIO_PIN_8 | GPIO_PIN_9)))
{
NVIC_DisableIRQRequest(irqmap->irqno);
}
}
else if ((irqmap->pinbit >= GPIO_PIN_10) && (irqmap->pinbit <= GPIO_PIN_15))
{
if (!(pin_irq_enable_mask & (GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12 | GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15)))
{
NVIC_DisableIRQRequest(irqmap->irqno);
}
}
else
{
NVIC_DisableIRQRequest(irqmap->irqno);
}
rt_hw_interrupt_enable(level);
}
else
{
return -RT_ENOSYS;
}
return RT_EOK;
}
const static struct rt_pin_ops _apm32_pin_ops =
{
_pin_mode,
_pin_write,
_pin_read,
_pin_attach_irq,
_pin_dettach_irq,
_pin_irq_enable,
_pin_get,
};
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);
}
}
void GPIO_EXTI_IRQHandler(uint16_t GPIO_Pin)
{
pin_irq_hdr(bit2bitno(GPIO_Pin));
}
void EINT0_IRQHandler(void)
{
rt_interrupt_enter();
if (EINT_ReadIntFlag(EINT_LINE_0))
{
EINT_ClearIntFlag(EINT_LINE_0);
GPIO_EXTI_IRQHandler(GPIO_PIN_0);
}
rt_interrupt_leave();
}
void EINT1_IRQHandler(void)
{
rt_interrupt_enter();
if (EINT_ReadIntFlag(EINT_LINE_1))
{
EINT_ClearIntFlag(EINT_LINE_1);
GPIO_EXTI_IRQHandler(GPIO_PIN_1);
}
rt_interrupt_leave();
}
void EINT2_IRQHandler(void)
{
rt_interrupt_enter();
if (EINT_ReadIntFlag(EINT_LINE_2))
{
EINT_ClearIntFlag(EINT_LINE_2);
GPIO_EXTI_IRQHandler(GPIO_PIN_2);
}
rt_interrupt_leave();
}
void EINT3_IRQHandler(void)
{
rt_interrupt_enter();
if (EINT_ReadIntFlag(EINT_LINE_3))
{
EINT_ClearIntFlag(EINT_LINE_3);
GPIO_EXTI_IRQHandler(GPIO_PIN_3);
}
rt_interrupt_leave();
}
void EINT4_IRQHandler(void)
{
rt_interrupt_enter();
if (EINT_ReadIntFlag(EINT_LINE_4))
{
EINT_ClearIntFlag(EINT_LINE_4);
GPIO_EXTI_IRQHandler(GPIO_PIN_4);
}
rt_interrupt_leave();
}
void EINT9_5_IRQHandler(void)
{
rt_interrupt_enter();
if (EINT_ReadIntFlag(EINT_LINE_5))
{
EINT_ClearIntFlag(EINT_LINE_5);
GPIO_EXTI_IRQHandler(GPIO_PIN_5);
}
if (EINT_ReadIntFlag(EINT_LINE_6))
{
EINT_ClearIntFlag(EINT_LINE_6);
GPIO_EXTI_IRQHandler(GPIO_PIN_6);
}
if (EINT_ReadIntFlag(EINT_LINE_7))
{
EINT_ClearIntFlag(EINT_LINE_7);
GPIO_EXTI_IRQHandler(GPIO_PIN_7);
}
if (EINT_ReadIntFlag(EINT_LINE_8))
{
EINT_ClearIntFlag(EINT_LINE_8);
GPIO_EXTI_IRQHandler(GPIO_PIN_8);
}
if (EINT_ReadIntFlag(EINT_LINE_9))
{
EINT_ClearIntFlag(EINT_LINE_9);
GPIO_EXTI_IRQHandler(GPIO_PIN_9);
}
rt_interrupt_leave();
}
void EINT15_10_IRQHandler(void)
{
rt_interrupt_enter();
if (EINT_ReadIntFlag(EINT_LINE_10))
{
EINT_ClearIntFlag(EINT_LINE_10);
GPIO_EXTI_IRQHandler(GPIO_PIN_10);
}
if (EINT_ReadIntFlag(EINT_LINE_11))
{
EINT_ClearIntFlag(EINT_LINE_11);
GPIO_EXTI_IRQHandler(GPIO_PIN_11);
}
if (EINT_ReadIntFlag(EINT_LINE_12))
{
EINT_ClearIntFlag(EINT_LINE_12);
GPIO_EXTI_IRQHandler(GPIO_PIN_12);
}
if (EINT_ReadIntFlag(EINT_LINE_13))
{
EINT_ClearIntFlag(EINT_LINE_13);
GPIO_EXTI_IRQHandler(GPIO_PIN_13);
}
if (EINT_ReadIntFlag(EINT_LINE_14))
{
EINT_ClearIntFlag(EINT_LINE_14);
GPIO_EXTI_IRQHandler(GPIO_PIN_14);
}
if (EINT_ReadIntFlag(EINT_LINE_15))
{
EINT_ClearIntFlag(EINT_LINE_15);
GPIO_EXTI_IRQHandler(GPIO_PIN_15);
}
rt_interrupt_leave();
}
int rt_hw_pin_init(void)
{
#ifdef GPIOA
RCM_EnableAPB2PeriphClock(RCM_APB2_PERIPH_GPIOA);
#endif
#ifdef GPIOB
RCM_EnableAPB2PeriphClock(RCM_APB2_PERIPH_GPIOB);
#endif
#ifdef GPIOC
RCM_EnableAPB2PeriphClock(RCM_APB2_PERIPH_GPIOC);
#endif
#ifdef GPIOD
RCM_EnableAPB2PeriphClock(RCM_APB2_PERIPH_GPIOD);
#endif
#ifdef GPIOE
RCM_EnableAPB2PeriphClock(RCM_APB2_PERIPH_GPIOE);
#endif
#ifdef GPIOF
RCM_EnableAPB2PeriphClock(RCM_APB2_PERIPH_GPIOF);
#endif
#ifdef GPIOG
RCM_EnableAPB2PeriphClock(RCM_APB2_PERIPH_GPIOG);
#endif
RCM_EnableAPB2PeriphClock(RCM_APB2_PERIPH_AFIO);
return rt_device_pin_register("pin", &_apm32_pin_ops, RT_NULL);
}
#endif /* RT_USING_PIN */
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