/******************************************************************************
 * @file    bsp_hw.c
 * @brief   CBR3 板级 GPIO / MCPWM：LED、按键、风扇
 * @author  cyWu <1917507415@qq.com>
 * @date    2026.08.29
 * @version V1.0.0，首次发布（移植门夹：删电机/充电/电量，改单 LED + 风扇 PWM）
 *
 * @note    CT1642 在 PG0/PG1、AHT20 在 PC4/PC5，各自独立驱动，
 *          bsp_hw 只管 LED/KEY/FAN，不碰这两组脚。
 ******************************************************************************/

#include "system/includes.h"
#include "asm/gpio.h"
#include "asm/mcpwm.h"
#include "bsp_hw.h"

#define LOG_TAG_CONST APP
#define LOG_TAG       "[BSP_HW]"
#define LOG_ERROR_ENABLE
#define LOG_INFO_ENABLE
#include "debug.h"

static uint8_t s_initialized;

/** 风扇 PWM 状态 */
typedef struct {
    uint8_t  pwm_clk_on;   /**< 1=MCPWM 时钟已打开 */
    uint16_t duty;         /**< 当前占空比 */
} BspFanCtx_t;

static BspFanCtx_t s_fan;

#if (BOARD_LED_ENABLE || BOARD_KEY_ENABLE)
/**
 * @brief  配置 GPIO 为推挽输出
 * @param  pin   GPIO 编号
 * @param  value 输出初值
 * @return 无
 */
static void bsp_pin_output(u32 pin, int value)
{
    gpio_set_pull_up(pin, 0);
    gpio_set_pull_down(pin, 0);
    gpio_set_die(pin, 1);
    gpio_direction_output(pin, value);
}
#endif

#if BOARD_KEY_ENABLE
/**
 * @brief  配置 GPIO 为数字输入（可内部上拉）
 * @param  pin     GPIO 编号
 * @param  pull_up 1=内部上拉，0=不上拉
 * @return 无
 */
static void bsp_pin_input(u32 pin, int pull_up)
{
    gpio_direction_output(pin, 1);
    gpio_set_direction(pin, 1);
    gpio_set_pull_down(pin, 0);
    gpio_set_pull_up(pin, pull_up ? 1 : 0);
    gpio_set_die(pin, 1);
}
#endif

#if BOARD_FAN_ENABLE
/**
 * @brief  初始化风扇 MCPWM ch0，初始占空比 0（关）
 * @return 无
 */
static void bsp_fan_pwm_init(void)
{
    struct pwm_platform_data pwm;

    gpio_set_pull_up(BOARD_FAN_PIN, 0);
    gpio_set_pull_down(BOARD_FAN_PIN, 0);
    gpio_set_die(BOARD_FAN_PIN, 1);

    pwm.pwm_aligned_mode = pwm_edge_aligned;
    pwm.frequency = BOARD_FAN_PWM_HZ;
    pwm.duty = 0;
    pwm.l_pin = (u8) - 1;
    pwm.complementary_en = 0;
    pwm.pwm_ch_num = pwm_ch0;
    pwm.h_pin = BOARD_FAN_PIN;
    mcpwm_init(&pwm);

    mcpwm_set_duty(pwm_ch0, 0);
    s_fan.pwm_clk_on = 1;
    s_fan.duty = 0;
    log_info("fan pwm %uHz duty=0\n", (unsigned)BOARD_FAN_PWM_HZ);
}

/**
 * @brief  打开 MCPWM 并绑回 PC3
 * @return 无
 */
static void bsp_fan_pwm_clock_on(void)
{
    if (s_fan.pwm_clk_on) {
        return;
    }
    mcpwm_open(pwm_ch0);
    gpio_och_sel_output_signal(BOARD_FAN_PIN, OUTPUT_CH_SIGNAL_MC_PWM0_H);
    gpio_set_direction(BOARD_FAN_PIN, 0);
    s_fan.pwm_clk_on = 1;
}

/**
 * @brief  关闭 MCPWM 时钟并拉低（待机/关机必关）
 * @return 无
 */
static void bsp_fan_pwm_clock_off(void)
{
    mcpwm_set_duty(pwm_ch0, 0);
    if (s_fan.pwm_clk_on) {
        mcpwm_close(pwm_ch0);
        gpio_och_disable_output_signal(BOARD_FAN_PIN, OUTPUT_CH_SIGNAL_MC_PWM0_H);
        JL_MCPWM->MCPWM_CON0 = 0;
        s_fan.pwm_clk_on = 0;
    }
    gpio_direction_output(BOARD_FAN_PIN, 0); /* 关 = 拉低（风扇高导通） */
}
#endif

/**
 * @brief  初始化 GPIO / 风扇 MCPWM
 * @return BSP_HW_OK=成功
 */
BspHw_Ret_t bsp_hw_init(void)
{
    if (s_initialized) {
        return BSP_HW_OK;
    }

#if BOARD_LED_ENABLE
    bsp_pin_output(BOARD_LED_PIN, !BOARD_LED_ON_LEVEL); /* 初始灭 */
#endif

#if BOARD_KEY_ENABLE
    bsp_pin_input(BOARD_KEY_PIN, 1);
#endif

#if BOARD_FAN_ENABLE
    bsp_fan_pwm_init();
    bsp_fan_pwm_clock_off(); /* 初始关，待机不耗电 */
#endif

    s_initialized = 1;
    log_info("hw init led=%d key=%d fan=%d\n",
             BOARD_LED_ENABLE, BOARD_KEY_ENABLE, BOARD_FAN_ENABLE);
    return BSP_HW_OK;
}

/**
 * @brief  查询板级硬件是否已初始化
 * @return BSP_HW_OK=已初始化，BSP_HW_ERR_NOT_INIT=未初始化
 */
BspHw_Ret_t bsp_hw_get_status(void)
{
    return s_initialized ? BSP_HW_OK : BSP_HW_ERR_NOT_INIT;
}

/**
 * @brief  状态 LED 开关（PC2，低电平亮）
 * @param  on 1=亮，0=灭
 * @return 无
 */
void bsp_led_set(uint8_t on)
{
#if BOARD_LED_ENABLE
    gpio_direction_output(BOARD_LED_PIN, on ? BOARD_LED_ON_LEVEL : !BOARD_LED_ON_LEVEL);
#else
    (void)on;
#endif
}

/**
 * @brief  风扇 PWM 占空比（PC3，高有效，20kHz）
 * @param  duty 0~10000（0%=关 MCPWM 并拉低；>0 打开时钟输出）
 * @return 无
 */
void bsp_fan_set_duty(uint16_t duty)
{
#if BOARD_FAN_ENABLE
    if (duty > 10000) {
        duty = 10000;
    }
    if (duty == 0) {
        bsp_fan_pwm_clock_off();
        s_fan.duty = 0;
        return;
    }
    bsp_fan_pwm_clock_on();
    mcpwm_set_duty(pwm_ch0, duty);
    s_fan.duty = duty;
#else
    (void)duty;
#endif
}

/**
 * @brief  读取按键
 * @return 1=按下，0=未按下
 */
uint8_t bsp_key_is_pressed(void)
{
#if BOARD_KEY_ENABLE
    return (uint8_t)(gpio_read(BOARD_KEY_PIN) == BOARD_KEY_ACTIVE_LEVEL);
#else
    return 0;
#endif
}

/**
 * @brief  进深睡前：风扇 PWM 关掉并拉低，灯全灭
 * @return 无
 */
void bsp_hw_enter_sleep_io(void)
{
    bsp_fan_set_duty(0);
    bsp_led_set(0);
}