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/*
* File : gpio.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2015, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2016-08-29 Aubr.Cool the first version
*/
#include <rthw.h>
#include <rtdevice.h>
#include <board.h>
#ifdef RT_USING_PIN
#include "stm32l0xx.h"
#define __RCC_GPIO_CLK_ENABLE(BIT) do { \
__IO uint32_t tmpreg; \
SET_BIT(RCC->IOPENR, BIT);\
/* Delay after an RCC peripheral clock enabling */ \
tmpreg = READ_BIT(RCC->IOPENR, RCC_IOPENR_GPIOCEN);\
UNUSED(tmpreg); \
} while(0)
#define __RCC_GPIO_CLK_DISABLE(BIT) CLEAR_BIT(RCC->IOPENR, BIT)
#define __STM32_PIN(index, gpio, gpio_index) \
{index, RCC_IOPENR_GPIO##gpio##EN, GPIO##gpio, GPIO_PIN_##gpio_index}
#define __STM32_PIN_DEFAULT {-1, 0, 0}
/* STM32 GPIO driver */
struct pin_index
{
int index;
unsigned int clk;
GPIO_TypeDef *gpio;
uint32_t pin;
};
static const struct pin_index pins[] =
{
#ifdef UFQFPN32
__STM32_PIN_DEFAULT,
__STM32_PIN(1, C, 14),
__STM32_PIN(2, C, 15),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(6, A, 0),
__STM32_PIN(7, A, 1),
__STM32_PIN(8, A, 2),
__STM32_PIN(9, A, 3),
__STM32_PIN(10, A, 4),
__STM32_PIN(11, A, 5),
__STM32_PIN(12, A, 6),
__STM32_PIN(13, A, 7),
__STM32_PIN(14, B, 0),
__STM32_PIN(15, B, 1),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(18, A, 8),
__STM32_PIN(19, A, 9),
__STM32_PIN(20, A, 10),
__STM32_PIN(21, A, 11),
__STM32_PIN(22, A, 12),
__STM32_PIN(23, A, 13),
__STM32_PIN_DEFAULT,
__STM32_PIN(25, A, 14),
__STM32_PIN(26, B, 4),
__STM32_PIN(27, B, 5),
__STM32_PIN(28, B, 6),
__STM32_PIN(29, B, 7),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
#endif
};
#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(pins))
{
index = &pins[pin];
if (index->index == -1)
index = RT_NULL;
}
else
{
index = RT_NULL;
}
return index;
};
inline void stm32_pin_write_early(rt_base_t pin, rt_base_t value)
{
const struct pin_index *index;
index = get_pin(pin);
if (index == RT_NULL)
{
return;
}
HAL_GPIO_WritePin(index->gpio, index->pin, value);
}
void stm32_pin_write(rt_device_t dev, rt_base_t pin, rt_base_t value)
{
stm32_pin_write_early(pin, value);
}
inline int stm32_pin_read_early(rt_base_t pin)
{
int value;
const struct pin_index *index;
value = PIN_LOW;
index = get_pin(pin);
if (index == RT_NULL)
{
return value;
}
value = HAL_GPIO_ReadPin(index->gpio, index->pin);
return value;
}
int stm32_pin_read(rt_device_t dev, rt_base_t pin)
{
return stm32_pin_read_early(pin);
}
void stm32_pin_mode_early(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;
}
/* Configure GPIO_InitStructure */
GPIO_InitStructure.Pin = index->pin;
GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
__RCC_GPIO_CLK_ENABLE(index->clk);
if (mode == GPIO_MODE_OUTPUT_PP)
{
/* output setting */
GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStructure.Pull = GPIO_NOPULL;
} else if(mode == GPIO_MODE_OUTPUT_OD)
{
GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_OD;
GPIO_InitStructure.Pull = GPIO_NOPULL;
}
else if (mode == GPIO_MODE_INPUT)
{
/* input setting: not pull. */
GPIO_InitStructure.Mode = GPIO_MODE_INPUT;
GPIO_InitStructure.Pull = GPIO_PULLUP;
} else if(((mode & 0xFF) == GPIO_MODE_AF_PP) ||
((mode & 0xFF) == GPIO_MODE_AF_OD)
) {
GPIO_InitStructure.Mode = (mode & ~0xFF00);
GPIO_InitStructure.Pull = GPIO_NOPULL;
GPIO_InitStructure.Alternate = (mode & 0xFF00) >> 8;
} else if(mode == GPIO_MODE_ANALOG){
GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
} else {
/* input setting:default. */
GPIO_InitStructure.Mode = GPIO_MODE_INPUT;
GPIO_InitStructure.Pull = GPIO_NOPULL;
}
HAL_GPIO_Init(index->gpio, &GPIO_InitStructure);
}
void stm32_pin_mode(rt_device_t dev, rt_base_t pin, rt_base_t mode)
{
stm32_pin_mode_early(pin, mode);
}
const static struct rt_pin_ops _stm32_pin_ops =
{
stm32_pin_mode,
stm32_pin_write,
stm32_pin_read,
};
int stm32_hw_pin_init(void)
{
int result;
result = rt_device_pin_register("pin", &_stm32_pin_ops, RT_NULL);
return result;
}
INIT_BOARD_EXPORT(stm32_hw_pin_init);
#endif
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