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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2017-09-06 勤为本 first version
* 2021-02-02 [email protected] adapt to ls1b
*/
#include "ls1b_public.h"
#include "ls1b_regs.h"
#include "ls1b_gpio.h"
#include "ls1b_pin.h"
/*
* 获取指定gpio的CFG寄存器
* @gpio gpio编号
* @ret CFG寄存器
*/
volatile unsigned int *gpio_get_cfg_reg(unsigned int gpio)
{
volatile unsigned int *gpio_cfgx = NULL; // GPIO_CFGx寄存器
unsigned int port = GPIO_GET_PORT(gpio);
switch (port)
{
case 0:
gpio_cfgx = (volatile unsigned int *)LS1B_GPIO_CFG0;
break;
case 1:
gpio_cfgx = (volatile unsigned int *)LS1B_GPIO_CFG1;
break;
default:
gpio_cfgx = NULL;
break;
}
return gpio_cfgx;
}
/*
* 获取指定gpio的EN寄存器
* @gpio gpio编号
* @ret EN寄存器
*/
volatile unsigned int *gpio_get_en_reg(unsigned int gpio)
{
volatile unsigned int *gpio_enx = NULL; // GPIO_ENx寄存器
unsigned int port = GPIO_GET_PORT(gpio);
switch (port)
{
case 0:
gpio_enx = (volatile unsigned int *)LS1B_GPIO_EN0;
break;
case 1:
gpio_enx = (volatile unsigned int *)LS1B_GPIO_EN1;
break;
default:
gpio_enx = NULL;
return gpio_enx;
}
return gpio_enx;
}
/*
* gpio初始化
* @gpio gpio引脚，取值范围[0, 127]
* @mode gpio的工作模式(输入、输出)
*
* 例: 将gpio50初始化为输出
* gpio_init(50, gpio_mode_output);
*/
void gpio_init(unsigned int gpio, gpio_mode_t mode)
{
volatile unsigned int *gpio_enx = NULL; // GPIO_ENx寄存器
unsigned int pin = GPIO_GET_PIN(gpio);
// 将pin设为普通GPIO
pin_set_purpose(gpio, PIN_PURPOSE_GPIO);
// 设置gpio工作模式(输入、输出)
gpio_enx = gpio_get_en_reg(gpio);
if (gpio_mode_output == mode) // 输出
{
reg_clr_one_bit(gpio_enx, pin);
}
else // 输入
{
reg_set_one_bit(gpio_enx, pin);
}
return ;
}
/*
* 在指定gpio输出高电平或低电平
* @gpio gpio引脚，取值范围[0, 127]
* @level 电平值
*
* 例: 在gpio50上输出低电平
* gpio_set(50, gpio_level_low);
*/
void gpio_set(unsigned int gpio, gpio_level_t level)
{
volatile unsigned int *gpio_outx = NULL; // GPIO_OUTx寄存器
unsigned int port = GPIO_GET_PORT(gpio);
unsigned int pin = GPIO_GET_PIN(gpio);
// 获取寄存器地址
switch (port)
{
case 0:
gpio_outx = (volatile unsigned int *)LS1B_GPIO_OUT0;
break;
case 1:
gpio_outx = (volatile unsigned int *)LS1B_GPIO_OUT1;
break;
default: // 正确的程序不应该走到这里，直接返回
return ;
}
// 输出
if (gpio_level_low == level)
{
reg_clr_one_bit(gpio_outx, pin);
}
else
{
reg_set_one_bit(gpio_outx, pin);
}
return ;
}
/*
* 读取指定gpio引脚的值
* @gpio gpio引脚，取值范围[0,127]
*
* 例: 读取gpio50引脚上的值
* gpio_level_t level;
* level = gpio_get(50);
*/
unsigned int gpio_get(unsigned int gpio)
{
volatile unsigned int *gpio_inx = NULL; // GPIO_INx寄存器
unsigned int port = GPIO_GET_PORT(gpio);
unsigned int pin = GPIO_GET_PIN(gpio);
// 获取寄存器地址
switch (port)
{
case 0:
gpio_inx = (volatile unsigned int *)LS1B_GPIO_IN0;
break;
case 1:
gpio_inx = (volatile unsigned int *)LS1B_GPIO_IN1;
break;
default: // 正常的流程不应该走到这里，直接返回
return 0;
}
// 读取
return reg_get_bit(gpio_inx, pin);
}
/**
* 设置中断类型
* @gpio gpio引脚
* @type 触发中断的条件。高电平触发、低电平触发、上升沿触发 or 下降沿触发
*/
void gpio_set_irq_type(unsigned int gpio, gpio_irq_type_t type)
{
volatile unsigned int *int_pol = NULL; // 中断极性选择寄存器
volatile unsigned int *int_edge = NULL; // 中断边沿选择寄存器
unsigned int port = GPIO_GET_PORT(gpio);
unsigned int pin = GPIO_GET_PIN(gpio);
// 获取寄存器地址
switch (port)
{
case 0: // GPIO[31:0]
int_pol = (volatile unsigned int *)LS1B_INT2_POL;
int_edge = (volatile unsigned int *)LS1B_INT2_EDGE;
break;
case 1: // GPIO[63:32]
int_pol = (volatile unsigned int *)LS1B_INT3_POL;
int_edge = (volatile unsigned int *)LS1B_INT3_EDGE;
break;
}
// 设置中断类型
switch (type)
{
case IRQ_TYPE_EDGE_RISING:
*int_pol |= (1 << pin);
*int_edge |= (1 << pin);
break;
case IRQ_TYPE_EDGE_FALLING:
*int_pol &= ~(1 << pin);
*int_edge |= (1 << pin);
break;
case IRQ_TYPE_LEVEL_HIGH:
*int_pol |= (1 << pin);
*int_edge &= ~(1 << pin);
break;
case IRQ_TYPE_LEVEL_LOW:
*int_pol &= ~(1 << pin);
*int_edge &= ~(1 << pin);
break;
default:
break;
}
return ;
}
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