调度器代码存储在 modules/scheduler/scheduler.c 文件中，包括调度器需要在 gTasksList 中访问的所有函数指针的列表。每个任务可提供一个用于获取和复位就绪标志或挂起标志的函数，以及一个指向要运行的任务的指针。

在调度器循环中，gTasksPendingCounter 值会跟踪有多少任务处于挂起状态。当循环遍历每个挂起任务标志时，如果循环发现一个挂起的任务，则调度器循环就会使该计数器递减。清除所有任务后，器件会通过调用 __WFI 进入低功耗模式。

#include "scheduler.h"
#define NUM_OF_TASKS 2 /* Update to match required number of tasks */ 
volatile extern int16_t gTasksPendingCounter;

/* 
  * Update gTasksList to include function pointers to the 
  * potential tasks you want to run. See DAC8Driver and 
  * switchDriver code and header files for examples.
  *
  */
static struct task gTasksList[NUM_OF_TASKS] =
    {
      { .getRdyFlag = getSwitchFlag,    .resetFlag = resetSwitchFlag,   .taskRun = runSwitchTask },
      { .getRdyFlag = getDACFlag,       .resetFlag = resetDACFlag,      .taskRun = runDACTask },
/*    {.getRdyFlag = , .resetFlag = , .taskRun = }, */
    };


void scheduler() {

    /* Iterate through all tasks and run them as necessary */
    while(1) {

        /* 
         * Iterate through tasks list until all tasks are completed.
         * Checking gTasksPendingCounter prevents us from going to 
         * sleep in the case where a task was triggered after we
         * checked its ready flag, but before we went to sleep.
         */
        while(gTasksPendingCounter > 0)
        {
            for(uint16_t i=0; i < NUM_OF_TASKS; i++)
            {
                /* Check if current task is ready */
                if(gTasksList[i].getRdyFlag())
                {   
                    /* Execute current task */
                    gTasksList[i].taskRun();
                    /* Reset ready for for current task */
                    gTasksList[i].resetFlag();
                     /* Disable interrupts during read, modify, write. */
                    __disable_irq();
                    /* Decrement pending tasks counter */
                    (gTasksPendingCounter)--;
                    /* Re-enable interrupts */
                    __enable_irq();
                }
            }
        }
        /* Sleep after all pending tasks are completed */
        __WFI();
    }
}