rt-thread-official/bsp/ls1cdev/libraries/ls1c_gpio.c

// <20><>װgpio<69>ӿ<EFBFBD>


#include "ls1c_public.h"
#include "ls1c_regs.h"
#include "ls1c_gpio.h"
#include "ls1c_pin.h"


/*
 * <EFBFBD><EFBFBD>ȡָ<EFBFBD><EFBFBD>gpio<EFBFBD><EFBFBD>CFG<EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD>
 * @gpio gpio<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 * @ret CFG<EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD>
 */
volatile unsigned int *gpio_get_cfg_reg(unsigned int gpio)
{
    volatile unsigned int *gpio_cfgx = NULL;            // GPIO_CFGx<47>Ĵ<EFBFBD><C4B4><EFBFBD>
    unsigned int port = GPIO_GET_PORT(gpio);

    switch (port)
    {
        case 0:
            gpio_cfgx = (volatile unsigned int *)LS1C_GPIO_CFG0;
            break;

        case 1:
            gpio_cfgx = (volatile unsigned int *)LS1C_GPIO_CFG1;
            break;

        case 2:
            gpio_cfgx = (volatile unsigned int *)LS1C_GPIO_CFG2;
            break;

        case 3:
            gpio_cfgx = (volatile unsigned int *)LS1C_GPIO_CFG3;
            break;

        default:
            gpio_cfgx = NULL;
            break;
    }

    return gpio_cfgx;
}


/*
 * <EFBFBD><EFBFBD>ȡָ<EFBFBD><EFBFBD>gpio<EFBFBD><EFBFBD>EN<EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD>
 * @gpio gpio<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 * @ret EN<EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD>
 */
volatile unsigned int *gpio_get_en_reg(unsigned int gpio)
{
    volatile unsigned int *gpio_enx = NULL;         // GPIO_ENx<4E>Ĵ<EFBFBD><C4B4><EFBFBD>
    unsigned int port = GPIO_GET_PORT(gpio);
    
    switch (port)
    {
        case 0:
            gpio_enx = (volatile unsigned int *)LS1C_GPIO_EN0;
            break;

        case 1:
            gpio_enx = (volatile unsigned int *)LS1C_GPIO_EN1;
            break;

        case 2:
            gpio_enx = (volatile unsigned int *)LS1C_GPIO_EN2;
            break;

        case 3:
            gpio_enx = (volatile unsigned int *)LS1C_GPIO_EN3;
            break;

        default:
            gpio_enx    = NULL;
            return gpio_enx;
    }

    return gpio_enx;
}

/*
 * gpio<EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>
 * @gpio gpio<EFBFBD><EFBFBD><EFBFBD>ţ<EFBFBD>ȡֵ<EFBFBD><EFBFBD>Χ[0, 127]
 * @mode gpio<EFBFBD>Ĺ<EFBFBD><EFBFBD><EFBFBD>ģʽ(<EFBFBD><EFBFBD><EFBFBD>롢<EFBFBD><EFBFBD><EFBFBD><EFBFBD>)
 *
 * <EFBFBD><EFBFBD>: <EFBFBD><EFBFBD>gpio50<EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 * gpio_init(50, gpio_mode_output);
 */
void gpio_init(unsigned int gpio, gpio_mode_t mode)
{
    volatile unsigned int *gpio_enx = NULL;        // GPIO_ENx<4E>Ĵ<EFBFBD><C4B4><EFBFBD>
    unsigned int pin = GPIO_GET_PIN(gpio);

    // <20><>pin<69><6E>Ϊ<EFBFBD><CEAA>ͨGPIO
    pin_set_purpose(gpio, PIN_PURPOSE_GPIO);

    // <20><><EFBFBD><EFBFBD>gpio<69><6F><EFBFBD><EFBFBD>ģʽ(<28><><EFBFBD>롢<EFBFBD><EBA1A2><EFBFBD><EFBFBD>)
    gpio_enx  = gpio_get_en_reg(gpio);
    if (gpio_mode_output == mode)       // <20><><EFBFBD><EFBFBD>
    {
        reg_clr_one_bit(gpio_enx, pin);
    }
    else                                // <20><><EFBFBD><EFBFBD>
    {
        reg_set_one_bit(gpio_enx, pin);
    }

    return ;
}


/*
 * <EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>gpio<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߵ<EFBFBD>ƽ<EFBFBD><EFBFBD><EFBFBD>͵<EFBFBD>ƽ
 * @gpio gpio<EFBFBD><EFBFBD><EFBFBD>ţ<EFBFBD>ȡֵ<EFBFBD><EFBFBD>Χ[0, 127]
 * @level <EFBFBD><EFBFBD>ƽֵ
 *
 * <EFBFBD><EFBFBD>: <EFBFBD><EFBFBD>gpio50<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>͵<EFBFBD>ƽ
 * gpio_set(50, gpio_level_low);
 */
void gpio_set(unsigned int gpio, gpio_level_t level)
{
    volatile unsigned int *gpio_outx = NULL;       // GPIO_OUTx<54>Ĵ<EFBFBD><C4B4><EFBFBD>
    unsigned int port   = GPIO_GET_PORT(gpio);
    unsigned int pin    = GPIO_GET_PIN(gpio);

    // <20><>ȡ<EFBFBD>Ĵ<EFBFBD><C4B4><EFBFBD><EFBFBD><EFBFBD>ַ
    switch (port)
    {
        case 0:
            gpio_outx = (volatile unsigned int *)LS1C_GPIO_OUT0;
            break;

        case 1:
            gpio_outx = (volatile unsigned int *)LS1C_GPIO_OUT1;
            break;

        case 2:
            gpio_outx = (volatile unsigned int *)LS1C_GPIO_OUT2;
            break;

        case 3:
            gpio_outx = (volatile unsigned int *)LS1C_GPIO_OUT3;
            break;

        default:        // <20><>ȷ<EFBFBD>ij<EFBFBD><C4B3><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><D3A6><EFBFBD>ߵ<EFBFBD><DFB5><EFBFBD><EFBFBD>ֱ<EFA3AC>ӷ<EFBFBD><D3B7><EFBFBD>
            return ;
    }

    // <20><><EFBFBD><EFBFBD>
    if (gpio_level_low == level)
    {
        reg_clr_one_bit(gpio_outx, pin);
    }
    else
    {
        reg_set_one_bit(gpio_outx, pin);
    }

    return ;
}


/*
 * <EFBFBD><EFBFBD>ȡָ<EFBFBD><EFBFBD>gpio<EFBFBD><EFBFBD><EFBFBD>ŵ<EFBFBD>ֵ
 * @gpio gpio<EFBFBD><EFBFBD><EFBFBD>ţ<EFBFBD>ȡֵ<EFBFBD><EFBFBD>Χ[0,127]
 *
 * <EFBFBD><EFBFBD>: <EFBFBD><EFBFBD>ȡgpio50<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵ<EFBFBD>ֵ
 * gpio_level_t level;
 * level = gpio_get(50);
 */
unsigned int gpio_get(unsigned int gpio)
{
    volatile unsigned int *gpio_inx = NULL;        // GPIO_INx<4E>Ĵ<EFBFBD><C4B4><EFBFBD>
    unsigned int port   = GPIO_GET_PORT(gpio);
    unsigned int pin    = GPIO_GET_PIN(gpio);

    // <20><>ȡ<EFBFBD>Ĵ<EFBFBD><C4B4><EFBFBD><EFBFBD><EFBFBD>ַ
    switch (port)
    {
        case 0:
            gpio_inx = (volatile unsigned int *)LS1C_GPIO_IN0;
            break;

        case 1:
            gpio_inx = (volatile unsigned int *)LS1C_GPIO_IN1;
            break;

        case 2:
            gpio_inx = (volatile unsigned int *)LS1C_GPIO_IN2;
            break;

        case 3:
            gpio_inx = (volatile unsigned int *)LS1C_GPIO_IN3;
            break;

        default:        // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̲<EFBFBD>Ӧ<EFBFBD><D3A6><EFBFBD>ߵ<EFBFBD><DFB5><EFBFBD><EFBFBD>ֱ<EFA3AC>ӷ<EFBFBD><D3B7><EFBFBD>
            return 0;
    }

    // <20><>ȡ
    return reg_get_bit(gpio_inx, pin);
}