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rt-thread/bsp/wch/arm/Libraries/ch32_drivers/drv_gpio_ch32f20x.c

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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-01-21 charlown first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <rthw.h>
#include "board.h"
#include "ch32f20x_gpio.h"
#ifdef RT_USING_PIN
#ifndef ITEM_NUM
#define ITEM_NUM(items) sizeof(items) / sizeof(items[0])
#endif
struct pin_info
{
rt_base_t pin;
rt_uint32_t gpio_pin;
rt_uint32_t portsource;
rt_uint32_t pinsource;
GPIO_TypeDef *gpio;
};
/*
*pin: assign number, start 0
*group: such GPIOA, use 'A'
*gpio_pin: such GPIO_PIN_0, use '0'
*/
#define ASSIGN_PIN(pin, group, gpio_pin) \
{ \
pin, GPIO_Pin_##gpio_pin, GPIO_PortSourceGPIO##group, GPIO_PinSource##gpio_pin, GPIO##group \
}
#define NOT_USE_PIN \
{ \
-1, 0, 0, 0, 0 \
}
static const struct pin_info pin_info_list[] = {
#if defined(GPIOA)
ASSIGN_PIN(0, A, 0),
ASSIGN_PIN(1, A, 1),
ASSIGN_PIN(2, A, 2),
ASSIGN_PIN(3, A, 3),
ASSIGN_PIN(4, A, 4),
ASSIGN_PIN(5, A, 5),
ASSIGN_PIN(6, A, 6),
ASSIGN_PIN(7, A, 7),
ASSIGN_PIN(8, A, 8),
ASSIGN_PIN(9, A, 9),
ASSIGN_PIN(10, A, 10),
ASSIGN_PIN(11, A, 11),
ASSIGN_PIN(12, A, 12),
ASSIGN_PIN(13, A, 13),
ASSIGN_PIN(14, A, 14),
ASSIGN_PIN(15, A, 15),
#endif
#if defined(GPIOB)
ASSIGN_PIN(16, B, 0),
ASSIGN_PIN(17, B, 1),
ASSIGN_PIN(18, B, 2),
ASSIGN_PIN(19, B, 3),
ASSIGN_PIN(20, B, 4),
ASSIGN_PIN(21, B, 5),
ASSIGN_PIN(22, B, 6),
ASSIGN_PIN(23, B, 7),
ASSIGN_PIN(24, B, 8),
ASSIGN_PIN(25, B, 9),
ASSIGN_PIN(26, B, 10),
ASSIGN_PIN(27, B, 11),
ASSIGN_PIN(28, B, 12),
ASSIGN_PIN(29, B, 13),
ASSIGN_PIN(30, B, 14),
ASSIGN_PIN(31, B, 15),
#endif
#if defined(GPIOC)
ASSIGN_PIN(32, C, 0),
ASSIGN_PIN(33, C, 1),
ASSIGN_PIN(34, C, 2),
ASSIGN_PIN(35, C, 3),
ASSIGN_PIN(36, C, 4),
ASSIGN_PIN(37, C, 5),
ASSIGN_PIN(38, C, 6),
ASSIGN_PIN(39, C, 7),
ASSIGN_PIN(40, C, 8),
ASSIGN_PIN(41, C, 9),
ASSIGN_PIN(42, C, 10),
ASSIGN_PIN(43, C, 11),
ASSIGN_PIN(44, C, 12),
ASSIGN_PIN(45, C, 13),
ASSIGN_PIN(46, C, 14),
ASSIGN_PIN(47, C, 15),
#endif
#if defined(GPIOD)
ASSIGN_PIN(48, D, 0),
ASSIGN_PIN(49, D, 1),
ASSIGN_PIN(50, D, 2),
ASSIGN_PIN(51, D, 3),
ASSIGN_PIN(52, D, 4),
ASSIGN_PIN(53, D, 5),
ASSIGN_PIN(54, D, 6),
ASSIGN_PIN(55, D, 7),
ASSIGN_PIN(56, D, 8),
ASSIGN_PIN(57, D, 9),
ASSIGN_PIN(58, D, 10),
ASSIGN_PIN(59, D, 11),
ASSIGN_PIN(60, D, 12),
ASSIGN_PIN(61, D, 13),
ASSIGN_PIN(62, D, 14),
ASSIGN_PIN(63, D, 15),
#endif
#if defined(GPIOE)
ASSIGN_PIN(64, E, 0),
ASSIGN_PIN(65, E, 1),
ASSIGN_PIN(66, E, 2),
ASSIGN_PIN(67, E, 3),
ASSIGN_PIN(68, E, 4),
ASSIGN_PIN(69, E, 5),
ASSIGN_PIN(70, E, 6),
ASSIGN_PIN(71, E, 7),
ASSIGN_PIN(72, E, 8),
ASSIGN_PIN(73, E, 9),
ASSIGN_PIN(74, E, 10),
ASSIGN_PIN(75, E, 11),
ASSIGN_PIN(76, E, 12),
ASSIGN_PIN(77, E, 13),
ASSIGN_PIN(78, E, 14),
ASSIGN_PIN(79, E, 15),
#endif
};
static const struct pin_info *pin_info_list_find(rt_base_t pin)
{
const struct pin_info *item = RT_NULL;
if ((pin != -1) && (pin < ITEM_NUM(pin_info_list)))
{
item = pin_info_list[pin].pin == -1 ? RT_NULL : &pin_info_list[pin];
}
return item;
}
static rt_base_t pin_info_list_find_pin(rt_uint16_t portsource, rt_uint16_t pinsource)
{
rt_base_t pin = -1;
int index;
for (index = 0; index < ITEM_NUM(pin_info_list); index++)
{
if (pin_info_list[index].portsource == portsource && pin_info_list[index].pinsource == pinsource)
{
pin = pin_info_list[index].pin;
break;
}
}
return pin;
}
/*
*use: 0 using the exti line, -1 do not using
*/
struct exti_line_irq
{
rt_uint16_t nvic_priority;
rt_uint16_t nvic_subpriority;
rt_uint32_t exit_line;
IRQn_Type irqn;
int use;
struct rt_pin_irq_hdr bind_irq_hdr;
};
static struct exti_line_irq exti_line_irq_list[] = {
{5, 0, EXTI_Line0, EXTI0_IRQn, 0, {
.pin = -1,
}},
{5, 0, EXTI_Line1, EXTI1_IRQn, 0, {
.pin = -1,
}},
{5, 0, EXTI_Line2, EXTI2_IRQn, 0, {
.pin = -1,
}},
{5, 0, EXTI_Line3, EXTI3_IRQn, 0, {
.pin = -1,
}},
{5, 0, EXTI_Line4, EXTI4_IRQn, 0, {
.pin = -1,
}},
{5, 0, EXTI_Line5, EXTI9_5_IRQn, 0, {
.pin = -1,
}},
{5, 0, EXTI_Line6, EXTI9_5_IRQn, 0, {
.pin = -1,
}},
{5, 0, EXTI_Line7, EXTI9_5_IRQn, 0, {
.pin = -1,
}},
{5, 0, EXTI_Line8, EXTI9_5_IRQn, 0, {
.pin = -1,
}},
{5, 0, EXTI_Line9, EXTI9_5_IRQn, 0, {
.pin = -1,
}},
{5, 0, EXTI_Line10, EXTI15_10_IRQn, 0, {
.pin = -1,
}},
{5, 0, EXTI_Line11, EXTI15_10_IRQn, 0, {
.pin = -1,
}},
{5, 0, EXTI_Line12, EXTI15_10_IRQn, 0, {
.pin = -1,
}},
{5, 0, EXTI_Line13, EXTI15_10_IRQn, 0, {
.pin = -1,
}},
{5, 0, EXTI_Line14, EXTI15_10_IRQn, 0, {
.pin = -1,
}},
{5, 0, EXTI_Line15, EXTI15_10_IRQn, 0, {
.pin = -1,
}},
};
static struct exti_line_irq *exti_line_irq_list_find(rt_int16_t pin)
{
struct exti_line_irq *item = RT_NULL;
int index;
for (index = 0; index < ITEM_NUM(exti_line_irq_list); index++)
{
if (exti_line_irq_list[index].bind_irq_hdr.pin == pin)
{
item = &exti_line_irq_list[index];
break;
}
}
return item;
}
static rt_err_t exti_line_irq_list_bind(struct rt_pin_irq_hdr *irq_hdr)
{
rt_err_t ret = RT_EFULL;
rt_base_t level;
struct exti_line_irq *item;
int index;
for (index = 0; index < ITEM_NUM(exti_line_irq_list); index++)
{
if (exti_line_irq_list[index].bind_irq_hdr.pin == -1 && exti_line_irq_list[index].use != -1)
{
item = &exti_line_irq_list[index];
break;
}
}
if (item != RT_NULL)
{
level = rt_hw_interrupt_disable();
item->bind_irq_hdr.pin = irq_hdr->pin;
item->bind_irq_hdr.mode = irq_hdr->mode;
item->bind_irq_hdr.hdr = irq_hdr->hdr;
item->bind_irq_hdr.args = irq_hdr->args;
rt_hw_interrupt_enable(level);
ret = RT_EOK;
}
return ret;
}
static rt_err_t exti_line_irq_list_unbind(rt_int16_t pin)
{
rt_err_t ret = RT_EEMPTY;
rt_base_t level;
struct exti_line_irq *item;
item = exti_line_irq_list_find(pin);
if (item != RT_NULL)
{
level = rt_hw_interrupt_disable();
item->bind_irq_hdr.pin = -1;
rt_hw_interrupt_enable(level);
ret = RT_EOK;
}
return ret;
}
void ch32f2_pin_mode(rt_device_t dev, rt_base_t pin, rt_base_t mode)
{
const struct pin_info *item;
GPIO_InitTypeDef gpio_initstruct;
item = pin_info_list_find(pin);
if (item == RT_NULL)
{
return;
}
gpio_initstruct.GPIO_Pin = item->gpio_pin;
gpio_initstruct.GPIO_Mode = GPIO_Mode_Out_PP;
gpio_initstruct.GPIO_Speed = GPIO_Speed_50MHz;
if (mode == PIN_MODE_OUTPUT)
{
gpio_initstruct.GPIO_Mode = GPIO_Mode_Out_PP;
}
else if (mode == PIN_MODE_INPUT)
{
gpio_initstruct.GPIO_Mode = GPIO_Mode_IN_FLOATING;
}
else if (mode == PIN_MODE_INPUT_PULLUP)
{
gpio_initstruct.GPIO_Mode = GPIO_Mode_IPU;
}
else if (mode == PIN_MODE_INPUT_PULLDOWN)
{
gpio_initstruct.GPIO_Mode = GPIO_Mode_IPD;
}
else if (mode == PIN_MODE_OUTPUT_OD)
{
gpio_initstruct.GPIO_Mode = GPIO_Mode_Out_OD;
}
GPIO_Init(item->gpio, &gpio_initstruct);
}
void ch32f2_pin_write(rt_device_t dev, rt_base_t pin, rt_base_t value)
{
const struct pin_info *item;
item = pin_info_list_find(pin);
if (item == RT_NULL)
{
return;
}
GPIO_WriteBit(item->gpio, item->gpio_pin, (BitAction)value);
}
int ch32f2_pin_read(rt_device_t dev, rt_base_t pin)
{
const struct pin_info *item;
item = pin_info_list_find(pin);
if (item == RT_NULL)
{
return PIN_LOW;
}
return GPIO_ReadInputDataBit(item->gpio, item->gpio_pin);
}
rt_err_t ch32f2_pin_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint32_t mode, void (*hdr)(void *args),
void *args)
{
struct rt_pin_irq_hdr bind_item;
bind_item.pin = pin;
bind_item.mode = mode;
bind_item.hdr = hdr;
bind_item.args = args;
return exti_line_irq_list_bind(&bind_item);
}
rt_err_t ch32f2_pin_detach_irq(struct rt_device *device, rt_int32_t pin)
{
return exti_line_irq_list_unbind(pin);
}
rt_err_t ch32f2_pin_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled)
{
struct exti_line_irq *find;
const struct pin_info *item;
rt_base_t level;
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
find = exti_line_irq_list_find(pin);
if (find == RT_NULL)
return RT_EINVAL;
item = pin_info_list_find(pin);
if (item == RT_NULL)
return RT_EINVAL;
if (enabled == PIN_IRQ_ENABLE)
{
level = rt_hw_interrupt_disable();
GPIO_EXTILineConfig(item->portsource, item->pinsource);
EXTI_InitStructure.EXTI_Line = find->exit_line;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
switch (find->bind_irq_hdr.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;
}
default:
break;
}
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = find->irqn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = find->nvic_priority;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = find->nvic_subpriority;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
rt_hw_interrupt_enable(level);
}
else
{
level = rt_hw_interrupt_disable();
EXTI_InitStructure.EXTI_Line = find->exit_line;
EXTI_InitStructure.EXTI_LineCmd = DISABLE;
EXTI_Init(&EXTI_InitStructure);
NVIC_InitStructure.NVIC_IRQChannelCmd = DISABLE;
NVIC_Init(&NVIC_InitStructure);
rt_hw_interrupt_enable(level);
}
return RT_EOK;
}
/*PX.XX*/
rt_base_t ch32f2_pin_get(const char *name)
{
rt_uint16_t portsource, pinsource;
int sz;
sz = rt_strlen(name);
if (sz == 4)
{
portsource = name[1] - 0x41;
pinsource = name[3] - 0x30;
return pin_info_list_find_pin(portsource, pinsource);
}
if (sz == 5)
{
portsource = name[1];
pinsource = (name[3] - 0x30) * 10 + (name[4] - 0x30);
return pin_info_list_find_pin(portsource, pinsource);
}
return -1;
}
const static struct rt_pin_ops pin_ops = {
.pin_mode = ch32f2_pin_mode,
.pin_write = ch32f2_pin_write,
.pin_read = ch32f2_pin_read,
.pin_attach_irq = ch32f2_pin_attach_irq,
.pin_detach_irq = ch32f2_pin_detach_irq,
.pin_irq_enable = ch32f2_pin_irq_enable,
.pin_get = ch32f2_pin_get,
};
int rt_hw_pin_init(void)
{
#ifdef GPIOA
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
#endif
#ifdef GPIOB
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
#endif
#ifdef GPIOC
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
#endif
#ifdef GPIOD
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE);
#endif
#ifdef GPIOE
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE, ENABLE);
#endif
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
return rt_device_pin_register("pin", &pin_ops, RT_NULL);
}
rt_inline void exti_irq_handler(rt_uint16_t seq)
{
if (EXTI_GetITStatus(exti_line_irq_list[seq].exit_line) == SET)
{
EXTI_ClearITPendingBit(exti_line_irq_list[seq].exit_line);
if (exti_line_irq_list[seq].use != -1 &&
exti_line_irq_list[seq].bind_irq_hdr.pin != -1 &&
exti_line_irq_list[seq].bind_irq_hdr.hdr != RT_NULL)
{
exti_line_irq_list[seq].bind_irq_hdr.hdr(exti_line_irq_list[seq].bind_irq_hdr.args);
}
}
}
void EXTI0_IRQHandler(void)
{
rt_interrupt_enter();
exti_irq_handler(0);
rt_interrupt_leave();
}
void EXTI1_IRQHandler(void)
{
rt_interrupt_enter();
exti_irq_handler(1);
rt_interrupt_leave();
}
void EXTI2_IRQHandler(void)
{
rt_interrupt_enter();
exti_irq_handler(2);
rt_interrupt_leave();
}
void EXTI3_IRQHandler(void)
{
rt_interrupt_enter();
exti_irq_handler(3);
rt_interrupt_leave();
}
void EXTI4_IRQHandler(void)
{
rt_interrupt_enter();
exti_irq_handler(4);
rt_interrupt_leave();
}
void EXTI9_5_IRQHandler(void)
{
rt_interrupt_enter();
exti_irq_handler(5);
exti_irq_handler(6);
exti_irq_handler(7);
exti_irq_handler(8);
exti_irq_handler(9);
rt_interrupt_leave();
}
void EXTI15_10_IRQHandler(void)
{
rt_interrupt_enter();
exti_irq_handler(10);
exti_irq_handler(11);
exti_irq_handler(12);
exti_irq_handler(13);
exti_irq_handler(14);
exti_irq_handler(15);
rt_interrupt_leave();
}
#endif /* RT_USING_PIN */
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