/* =============================================================================
 * led.c - C 板 RGB LED(TIM5 CH1/2/3 -> PH10 蓝/PH11 绿/PH12 红,高电平亮)
 * 说明:  CubeMX 配置 TIM5 PSC=0/ARR=65535,此处改为 legacy 的 PSC=83/ARR=999
 *        (1kHz PWM 千分位);所有接口带懒初始化,任何任务/初始化阶段都能安全
 *        调用用于报警(引脚处于复用模式时直接写 GPIO 寄存器是无效的)
 * ========================================================================== */
#include "led.h"
#include "tim.h"

extern TIM_HandleTypeDef htim5;

static uint8_t led_inited = 0;

void led_ensure_init(void)
{
    if (!led_inited)
        led_init();
}

void led_init(void)
{
    led_inited = 1;
    /* CubeMX 生成的 PSC=0/ARR=65535 改为 legacy 的 PSC=83/ARR=999(1kHz PWM,千分位) */
    __HAL_TIM_SET_PRESCALER(&htim5, 84 - 1);
    __HAL_TIM_SET_AUTORELOAD(&htim5, 1000 - 1);
    __HAL_TIM_SET_COMPARE(&htim5, TIM_CHANNEL_1, 0);
    __HAL_TIM_SET_COMPARE(&htim5, TIM_CHANNEL_2, 0);
    __HAL_TIM_SET_COMPARE(&htim5, TIM_CHANNEL_3, 0);
    HAL_TIM_PWM_Start(&htim5, TIM_CHANNEL_1);
    HAL_TIM_PWM_Start(&htim5, TIM_CHANNEL_2);
    HAL_TIM_PWM_Start(&htim5, TIM_CHANNEL_3);
}

/* 通道与颜色的对应关系同 legacy:CCR1=蓝,CCR2=绿,CCR3=红 */
void led_set_color(uint8_t r, uint8_t g, uint8_t b)
{
    led_ensure_init();
    __HAL_TIM_SET_COMPARE(&htim5, TIM_CHANNEL_1, (uint32_t)b * 1000 / 255);
    __HAL_TIM_SET_COMPARE(&htim5, TIM_CHANNEL_2, (uint32_t)g * 1000 / 255);
    __HAL_TIM_SET_COMPARE(&htim5, TIM_CHANNEL_3, (uint32_t)r * 1000 / 255);
}

void led_set_all_off(void)
{
    led_ensure_init();
    led_set_color(0, 0, 0);
}

void led_set_red(uint8_t on)
{
    led_ensure_init();
    __HAL_TIM_SET_COMPARE(&htim5, TIM_CHANNEL_3, on ? 1000 : 0);
}

void led_set_green(uint8_t on)
{
    led_ensure_init();
    __HAL_TIM_SET_COMPARE(&htim5, TIM_CHANNEL_2, on ? 1000 : 0);
}

void led_set_blue(uint8_t on)
{
    led_ensure_init();
    __HAL_TIM_SET_COMPARE(&htim5, TIM_CHANNEL_1, on ? 1000 : 0);
}