在led_service_func中添加CPU使用率计算逻辑，并根据配置条件设置默认值。

		k_msleep(100);

		k_thread_runtime_stats_all_get(&idle_stats_new);

		#if CONFIG_SCHED_THREAD_USAGE_ALL

		// 计算CPU使用率 (0-100)

		idle_cycles_diff = idle_stats_new.idle_cycles - idle_stats_old.idle_cycles;

		total_cycles_diff =

			idle_stats_new.execution_cycles - idle_stats_old.execution_cycles;

		float cpu_usage = 100.0f * (1.0f - ((float)idle_cycles_diff / total_cycles_diff));

		#else

		float cpu_usage = 0.2f;

		#endif

		// // 映射到RGB值 (红色表示高负载，绿色表示低负载)

		uint8_t red = (uint8_t)((cpu_usage / 100.0f) * 0xff);

			NULL, -1, 0, K_NO_WAIT);

}

#ifndef PWR_INIT

#define PWR_INIT

#endif

#ifndef LED_INIT

#define LED_INIT

#endif

int board_init(void)

{

	k_sleep(K_MSEC(550));