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rt-thread/bsp/stm32f40x/drivers/gpio.c

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/*
* File : gpio.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2017, 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
* 2017-03-24 armink the first version
*/
#include <rthw.h>
#include <rtdevice.h>
#include <board.h>
#ifdef RT_USING_PIN
#define STM32_PIN_NUMBERS 100 //[48, 64, 100, 144 ]
#define __STM32_PIN(index, rcc, gpio, gpio_index) { 0, RCC_##rcc##Periph_GPIO##gpio, GPIO##gpio, GPIO_Pin_##gpio_index}
#define __STM32_PIN_DEFAULT {-1, 0, 0, 0}
#define ITEM_NUM(items) sizeof(items)/sizeof(items[0])
/* STM32 GPIO driver */
struct pin_index
{
int index;
uint32_t rcc;
GPIO_TypeDef *gpio;
uint32_t pin;
};
/* STM32 GPIO irq information */
struct pin_irq
{
/* EXTI port source gpiox, such as EXTI_PortSourceGPIOA */
rt_uint8_t port_source;
/* EXTI pin sources, such as EXTI_PinSource0 */
rt_uint8_t pin_source;
/* NVIC IRQ EXTI channel, such as EXTI0_IRQn */
enum IRQn irq_exti_channel;
/* EXTI line, such as EXTI_Line0 */
rt_uint32_t exti_line;
};
static const struct pin_index pins[] =
{
#if (STM32_PIN_NUMBERS == 48)
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(2, AHB1, C, 13),
__STM32_PIN(3, AHB1, C, 14),
__STM32_PIN(4, AHB1, C, 15),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(10, AHB1, A, 0),
__STM32_PIN(11, AHB1, A, 1),
__STM32_PIN(12, AHB1, A, 2),
__STM32_PIN(13, AHB1, A, 3),
__STM32_PIN(14, AHB1, A, 4),
__STM32_PIN(15, AHB1, A, 5),
__STM32_PIN(16, AHB1, A, 6),
__STM32_PIN(17, AHB1, A, 7),
__STM32_PIN(18, AHB1, B, 0),
__STM32_PIN(19, AHB1, B, 1),
__STM32_PIN(20, AHB1, B, 2),
__STM32_PIN(21, AHB1, B, 10),
__STM32_PIN(22, AHB1, B, 11),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(25, AHB1, B, 12),
__STM32_PIN(26, AHB1, B, 13),
__STM32_PIN(27, AHB1, B, 14),
__STM32_PIN(28, AHB1, B, 15),
__STM32_PIN(29, AHB1, A, 8),
__STM32_PIN(30, AHB1, A, 9),
__STM32_PIN(31, AHB1, A, 10),
__STM32_PIN(32, AHB1, A, 11),
__STM32_PIN(33, AHB1, A, 12),
__STM32_PIN(34, AHB1, A, 13),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(37, AHB1, A, 14),
__STM32_PIN(38, AHB1, A, 15),
__STM32_PIN(39, AHB1, B, 3),
__STM32_PIN(40, AHB1, B, 4),
__STM32_PIN(41, AHB1, B, 5),
__STM32_PIN(42, AHB1, B, 6),
__STM32_PIN(43, AHB1, B, 7),
__STM32_PIN_DEFAULT,
__STM32_PIN(45, AHB1, B, 8),
__STM32_PIN(46, AHB1, B, 9),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
#endif
#if (STM32_PIN_NUMBERS == 64)
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(2, AHB1, C, 13),
__STM32_PIN(3, AHB1, C, 14),
__STM32_PIN(4, AHB1, C, 15),
__STM32_PIN(5, AHB1, D, 0),
__STM32_PIN(6, AHB1, D, 1),
__STM32_PIN_DEFAULT,
__STM32_PIN(8, AHB1, C, 0),
__STM32_PIN(9, AHB1, C, 1),
__STM32_PIN(10, AHB1, C, 2),
__STM32_PIN(11, AHB1, C, 3),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(14, AHB1, A, 0),
__STM32_PIN(15, AHB1, A, 1),
__STM32_PIN(16, AHB1, A, 2),
__STM32_PIN(17, AHB1, A, 3),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(20, AHB1, A, 4),
__STM32_PIN(21, AHB1, A, 5),
__STM32_PIN(22, AHB1, A, 6),
__STM32_PIN(23, AHB1, A, 7),
__STM32_PIN(24, AHB1, C, 4),
__STM32_PIN(25, AHB1, C, 5),
__STM32_PIN(26, AHB1, B, 0),
__STM32_PIN(27, AHB1, B, 1),
__STM32_PIN(28, AHB1, B, 2),
__STM32_PIN(29, AHB1, B, 10),
__STM32_PIN(30, AHB1, B, 11),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(33, AHB1, B, 12),
__STM32_PIN(34, AHB1, B, 13),
__STM32_PIN(35, AHB1, B, 14),
__STM32_PIN(36, AHB1, B, 15),
__STM32_PIN(37, AHB1, C, 6),
__STM32_PIN(38, AHB1, C, 7),
__STM32_PIN(39, AHB1, C, 8),
__STM32_PIN(40, AHB1, C, 9),
__STM32_PIN(41, AHB1, A, 8),
__STM32_PIN(42, AHB1, A, 9),
__STM32_PIN(43, AHB1, A, 10),
__STM32_PIN(44, AHB1, A, 11),
__STM32_PIN(45, AHB1, A, 12),
__STM32_PIN(46, AHB1, A, 13),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(49, AHB1, A, 14),
__STM32_PIN(50, AHB1, A, 15),
__STM32_PIN(51, AHB1, C, 10),
__STM32_PIN(52, AHB1, C, 11),
__STM32_PIN(53, AHB1, C, 12),
__STM32_PIN(54, AHB1, D, 2),
__STM32_PIN(55, AHB1, B, 3),
__STM32_PIN(56, AHB1, B, 4),
__STM32_PIN(57, AHB1, B, 5),
__STM32_PIN(58, AHB1, B, 6),
__STM32_PIN(59, AHB1, B, 7),
__STM32_PIN_DEFAULT,
__STM32_PIN(61, AHB1, B, 8),
__STM32_PIN(62, AHB1, B, 9),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
#endif
#if (STM32_PIN_NUMBERS == 100)
__STM32_PIN_DEFAULT,
__STM32_PIN(1, AHB1, E, 2),
__STM32_PIN(2, AHB1, E, 3),
__STM32_PIN(3, AHB1, E, 4),
__STM32_PIN(4, AHB1, E, 5),
__STM32_PIN(5, AHB1, E, 6),
__STM32_PIN_DEFAULT,
__STM32_PIN(7, AHB1, C, 13),
__STM32_PIN(8, AHB1, C, 14),
__STM32_PIN(9, AHB1, C, 15),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(15, AHB1, C, 0),
__STM32_PIN(16, AHB1, C, 1),
__STM32_PIN(17, AHB1, C, 2),
__STM32_PIN(18, AHB1, C, 3),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(23, AHB1, A, 0),
__STM32_PIN(24, AHB1, A, 1),
__STM32_PIN(25, AHB1, A, 2),
__STM32_PIN(26, AHB1, A, 3),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(29, AHB1, A, 4),
__STM32_PIN(30, AHB1, A, 5),
__STM32_PIN(31, AHB1, A, 6),
__STM32_PIN(32, AHB1, A, 7),
__STM32_PIN(33, AHB1, C, 4),
__STM32_PIN(34, AHB1, C, 5),
__STM32_PIN(35, AHB1, B, 0),
__STM32_PIN(36, AHB1, B, 1),
__STM32_PIN(37, AHB1, B, 2),
__STM32_PIN(38, AHB1, E, 7),
__STM32_PIN(39, AHB1, E, 8),
__STM32_PIN(40, AHB1, E, 9),
__STM32_PIN(41, AHB1, E, 10),
__STM32_PIN(42, AHB1, E, 11),
__STM32_PIN(43, AHB1, E, 12),
__STM32_PIN(44, AHB1, E, 13),
__STM32_PIN(45, AHB1, E, 14),
__STM32_PIN(46, AHB1, E, 15),
__STM32_PIN(47, AHB1, B, 10),
__STM32_PIN(48, AHB1, B, 11),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(51, AHB1, B, 12),
__STM32_PIN(52, AHB1, B, 13),
__STM32_PIN(53, AHB1, B, 14),
__STM32_PIN(54, AHB1, B, 15),
__STM32_PIN(55, AHB1, D, 8),
__STM32_PIN(56, AHB1, D, 9),
__STM32_PIN(57, AHB1, D, 10),
__STM32_PIN(58, AHB1, D, 11),
__STM32_PIN(59, AHB1, D, 12),
__STM32_PIN(60, AHB1, D, 13),
__STM32_PIN(61, AHB1, D, 14),
__STM32_PIN(62, AHB1, D, 15),
__STM32_PIN(63, AHB1, C, 6),
__STM32_PIN(64, AHB1, C, 7),
__STM32_PIN(65, AHB1, C, 8),
__STM32_PIN(66, AHB1, C, 9),
__STM32_PIN(67, AHB1, A, 8),
__STM32_PIN(68, AHB1, A, 9),
__STM32_PIN(69, AHB1, A, 10),
__STM32_PIN(70, AHB1, A, 11),
__STM32_PIN(71, AHB1, A, 12),
__STM32_PIN(72, AHB1, A, 13),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(76, AHB1, A, 14),
__STM32_PIN(77, AHB1, A, 15),
__STM32_PIN(78, AHB1, C, 10),
__STM32_PIN(79, AHB1, C, 11),
__STM32_PIN(80, AHB1, C, 12),
__STM32_PIN(81, AHB1, D, 0),
__STM32_PIN(82, AHB1, D, 1),
__STM32_PIN(83, AHB1, D, 2),
__STM32_PIN(84, AHB1, D, 3),
__STM32_PIN(85, AHB1, D, 4),
__STM32_PIN(86, AHB1, D, 5),
__STM32_PIN(87, AHB1, D, 6),
__STM32_PIN(88, AHB1, D, 7),
__STM32_PIN(89, AHB1, B, 3),
__STM32_PIN(90, AHB1, B, 4),
__STM32_PIN(91, AHB1, B, 5),
__STM32_PIN(92, AHB1, B, 6),
__STM32_PIN(93, AHB1, B, 7),
__STM32_PIN_DEFAULT,
__STM32_PIN(95, AHB1, B, 8),
__STM32_PIN(96, AHB1, B, 9),
__STM32_PIN(97, AHB1, E, 0),
__STM32_PIN(98, AHB1, E, 1),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
#endif
#if (STM32_PIN_NUMBERS == 144)
__STM32_PIN_DEFAULT,
__STM32_PIN(1, AHB1, E, 2),
__STM32_PIN(2, AHB1, E, 3),
__STM32_PIN(3, AHB1, E, 4),
__STM32_PIN(4, AHB1, E, 5),
__STM32_PIN(5, AHB1, E, 6),
__STM32_PIN_DEFAULT,
__STM32_PIN(7, AHB1, C, 13),
__STM32_PIN(8, AHB1, C, 14),
__STM32_PIN(9, AHB1, C, 15),
__STM32_PIN(10, AHB1, F, 0),
__STM32_PIN(11, AHB1, F, 1),
__STM32_PIN(12, AHB1, F, 2),
__STM32_PIN(13, AHB1, F, 3),
__STM32_PIN(14, AHB1, F, 4),
__STM32_PIN(15, AHB1, F, 5),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(18, AHB1, F, 6),
__STM32_PIN(19, AHB1, F, 7),
__STM32_PIN(20, AHB1, F, 8),
__STM32_PIN(21, AHB1, F, 9),
__STM32_PIN(22, AHB1, F, 10),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(26, AHB1, C, 0),
__STM32_PIN(27, AHB1, C, 1),
__STM32_PIN(28, AHB1, C, 2),
__STM32_PIN(29, AHB1, C, 3),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(34, AHB1, A, 0),
__STM32_PIN(35, AHB1, A, 1),
__STM32_PIN(36, AHB1, A, 2),
__STM32_PIN(37, AHB1, A, 3),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(40, AHB1, A, 4),
__STM32_PIN(41, AHB1, A, 5),
__STM32_PIN(42, AHB1, A, 6),
__STM32_PIN(43, AHB1, A, 7),
__STM32_PIN(44, AHB1, C, 4),
__STM32_PIN(45, AHB1, C, 5),
__STM32_PIN(46, AHB1, B, 0),
__STM32_PIN(47, AHB1, B, 1),
__STM32_PIN(48, AHB1, B, 2),
__STM32_PIN(49, AHB1, F, 11),
__STM32_PIN(50, AHB1, F, 12),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(53, AHB1, F, 13),
__STM32_PIN(54, AHB1, F, 14),
__STM32_PIN(55, AHB1, F, 15),
__STM32_PIN(56, AHB1, G, 0),
__STM32_PIN(57, AHB1, G, 1),
__STM32_PIN(58, AHB1, E, 7),
__STM32_PIN(59, AHB1, E, 8),
__STM32_PIN(60, AHB1, E, 9),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(63, AHB1, E, 10),
__STM32_PIN(64, AHB1, E, 11),
__STM32_PIN(65, AHB1, E, 12),
__STM32_PIN(66, AHB1, E, 13),
__STM32_PIN(67, AHB1, E, 14),
__STM32_PIN(68, AHB1, E, 15),
__STM32_PIN(69, AHB1, B, 10),
__STM32_PIN(70, AHB1, B, 11),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(73, AHB1, B, 12),
__STM32_PIN(74, AHB1, B, 13),
__STM32_PIN(75, AHB1, B, 14),
__STM32_PIN(76, AHB1, B, 15),
__STM32_PIN(77, AHB1, D, 8),
__STM32_PIN(78, AHB1, D, 9),
__STM32_PIN(79, AHB1, D, 10),
__STM32_PIN(80, AHB1, D, 11),
__STM32_PIN(81, AHB1, D, 12),
__STM32_PIN(82, AHB1, D, 13),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(85, AHB1, D, 14),
__STM32_PIN(86, AHB1, D, 15),
__STM32_PIN(87, AHB1, G, 2),
__STM32_PIN(88, AHB1, G, 3),
__STM32_PIN(89, AHB1, G, 4),
__STM32_PIN(90, AHB1, G, 5),
__STM32_PIN(91, AHB1, G, 6),
__STM32_PIN(92, AHB1, G, 7),
__STM32_PIN(93, AHB1, G, 8),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(96, AHB1, C, 6),
__STM32_PIN(97, AHB1, C, 7),
__STM32_PIN(98, AHB1, C, 8),
__STM32_PIN(99, AHB1, C, 9),
__STM32_PIN(100, AHB1, A, 8),
__STM32_PIN(101, AHB1, A, 9),
__STM32_PIN(102, AHB1, A, 10),
__STM32_PIN(103, AHB1, A, 11),
__STM32_PIN(104, AHB1, A, 12),
__STM32_PIN(105, AHB1, A, 13),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(109, AHB1, A, 14),
__STM32_PIN(110, AHB1, A, 15),
__STM32_PIN(111, AHB1, C, 10),
__STM32_PIN(112, AHB1, C, 11),
__STM32_PIN(113, AHB1, C, 12),
__STM32_PIN(114, AHB1, D, 0),
__STM32_PIN(115, AHB1, D, 1),
__STM32_PIN(116, AHB1, D, 2),
__STM32_PIN(117, AHB1, D, 3),
__STM32_PIN(118, AHB1, D, 4),
__STM32_PIN(119, AHB1, D, 5),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(122, AHB1, D, 6),
__STM32_PIN(123, AHB1, D, 7),
__STM32_PIN(124, AHB1, G, 9),
__STM32_PIN(125, AHB1, G, 10),
__STM32_PIN(126, AHB1, G, 11),
__STM32_PIN(127, AHB1, G, 12),
__STM32_PIN(128, AHB1, G, 13),
__STM32_PIN(129, AHB1, G, 14),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
__STM32_PIN(132, AHB1, G, 15),
__STM32_PIN(133, AHB1, B, 3),
__STM32_PIN(134, AHB1, B, 4),
__STM32_PIN(135, AHB1, B, 5),
__STM32_PIN(136, AHB1, B, 6),
__STM32_PIN(137, AHB1, B, 7),
__STM32_PIN_DEFAULT,
__STM32_PIN(139, AHB1, B, 8),
__STM32_PIN(140, AHB1, B, 9),
__STM32_PIN(141, AHB1, E, 0),
__STM32_PIN(142, AHB1, E, 1),
__STM32_PIN_DEFAULT,
__STM32_PIN_DEFAULT,
#endif
};
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},
};
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;
};
void stm32_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 stm32_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 value;
}
if (GPIO_ReadInputDataBit(index->gpio, index->pin) == Bit_RESET)
{
value = PIN_LOW;
}
else
{
value = PIN_HIGH;
}
return value;
}
void stm32_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_AHB1PeriphClockCmd(index->rcc, ENABLE);
/* Configure GPIO_InitStructure */
GPIO_InitStructure.GPIO_Pin = index->pin;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
if (mode == PIN_MODE_OUTPUT)
{
/* output setting */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
}
else if (mode == PIN_MODE_INPUT)
{
/* input setting: not pull. */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
}
else if (mode == PIN_MODE_INPUT_PULLUP)
{
/* input setting: pull up. */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
}
else if (mode == PIN_MODE_INPUT_PULLDOWN)
{
/* input setting: pull down. */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
}
else if (mode == PIN_MODE_OUTPUT_OD)
{
/* output setting: open drain */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
}
else
{
/* error mode */
RT_ASSERT(0);
}
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 ((1UL << i) == bit)
{
return i;
}
}
return -1;
}
rt_inline rt_int32_t bitno2bit(rt_uint32_t bitno)
{
if (bitno <= 32)
{
return 1UL << bitno;
}
else
{
return 0;
}
}
static const struct pin_irq *get_pin_irq(uint16_t pin)
{
static struct pin_irq irq;
const struct pin_index *index;
index = get_pin(pin);
if (index == RT_NULL)
{
return RT_NULL;
}
irq.exti_line = index->pin;
irq.pin_source = bit2bitno(index->pin);
irq.port_source = ((uint32_t)index->gpio - GPIOA_BASE) / (GPIOB_BASE - GPIOA_BASE);
switch (irq.pin_source)
{
case 0 : irq.irq_exti_channel = EXTI0_IRQn;break;
case 1 : irq.irq_exti_channel = EXTI1_IRQn;break;
case 2 : irq.irq_exti_channel = EXTI2_IRQn;break;
case 3 : irq.irq_exti_channel = EXTI3_IRQn;break;
case 4 : irq.irq_exti_channel = EXTI4_IRQn;break;
case 5 :
case 6 :
case 7 :
case 8 :
case 9 : irq.irq_exti_channel = EXTI9_5_IRQn;break;
case 10 :
case 11 :
case 12 :
case 13 :
case 14 :
case 15 : irq.irq_exti_channel = EXTI15_10_IRQn;break;
default : return RT_NULL;
}
return &irq;
};
rt_err_t stm32_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(pin_irq_hdr_tab))
{
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;
//TODO PA1 will overwrite PB1's hdr, using rt_list ?
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;
}
rt_err_t stm32_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(pin_irq_hdr_tab))
{
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;
}
rt_err_t stm32_pin_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled)
{
const struct pin_index *index;
const struct pin_irq *irq;
rt_base_t level;
rt_int32_t irqindex = -1;
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(pin_irq_hdr_tab))
{
return -RT_ENOSYS;
}
level = rt_hw_interrupt_disable();
if (pin_irq_hdr_tab[irqindex].pin == -1)
{
rt_hw_interrupt_enable(level);
return -RT_ENOSYS;
}
irq = get_pin_irq(pin);
if (irq == RT_NULL)
{
rt_hw_interrupt_enable(level);
return -RT_ENOSYS;
}
/* select the input source pin for the EXTI line */
SYSCFG_EXTILineConfig(irq->port_source, irq->pin_source);
/* select the mode(interrupt, event) and configure the trigger selection */
EXTI_InitStructure.EXTI_Line = irq->exti_line;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
switch (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);
/* configure NVIC IRQ channel mapped to the EXTI line */
NVIC_InitStructure.NVIC_IRQChannel = irq->irq_exti_channel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
rt_hw_interrupt_enable(level);
}
else if (enabled == PIN_IRQ_DISABLE)
{
irq = get_pin_irq(index->pin);
if (irq == RT_NULL)
{
return -RT_ENOSYS;
}
EXTI_InitStructure.EXTI_Line = irq->exti_line;
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 _stm32_pin_ops =
{
stm32_pin_mode,
stm32_pin_write,
stm32_pin_read,
stm32_pin_attach_irq,
stm32_pin_detach_irq,
stm32_pin_irq_enable,
};
int stm32_hw_pin_init(void)
{
int result;
/* enable SYSCFG clock for EXTI */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
result = rt_device_pin_register("pin", &_stm32_pin_ops, RT_NULL);
return result;
}
INIT_BOARD_EXPORT(stm32_hw_pin_init);
rt_inline void pin_irq_hdr(int irqno)
{
EXTI_ClearITPendingBit(bitno2bit(irqno));
if (pin_irq_hdr_tab[irqno].hdr)
{
pin_irq_hdr_tab[irqno].hdr(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();
}
#endif
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