TencentOS-tiny 時間管理（十 四）

一、時間管理

概述

時間管理，提供了一族與時間相關的函數，可以獲取/設置系統時鐘滴答數（systick）、systick與毫秒單位之間互相轉化、按毫秒、牆上時鐘等單位進行任務睡眠的功能。

API講解

編程實例

1、配置每秒鐘的系統滴答數TOS_CFG_CPU_TICK_PER_SECOND：

#define TOS_CFG_CPU_TICK_PER_SECOND 1000u

2、編寫main.c示例代碼：

/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "usart.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "cmsis_os.h" 
#include "stdio.h"

#include "tos_k.h"
/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
#define STK_SIZE_TASK_DEMO      512

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
k_stack_t stack_task_demo[STK_SIZE_TASK_DEMO];

k_task_t task_demo;

extern void entry_task_demo(void *arg);


/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
void entry_task_demo(void *arg)
{
    k_time_t ms;
    k_tick_t systick, after_systick;

    // 因爲TOS_CFG_CPU_TICK_PER_SECOND爲1000，也就是一秒鐘會有1000個systick，因此1000個systick等於1000毫秒。
    systick = tos_millisec2tick(2000);
    printf("%d millisec equals to %lld ticks\n", 2000, systick);

    ms = tos_tick2millisec(1000);
    printf("%lld ticks equals to %d millisec\n", (k_tick_t)1000, ms);

    systick = tos_systick_get();
    printf("before sleep, systick is %lld\n", systick);

    tos_sleep_ms(2000);

    after_systick = tos_systick_get();
    printf("after sleep %d ms, systick is %lld\n", 2000, after_systick);

    printf("milliseconds sleep is about: %d\n", tos_tick2millisec(after_systick - systick));
}
/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_USART1_UART_Init();
  /* USER CODE BEGIN 2 */
	
	tos_knl_init();
	// 創建靜態內存池
	(void)tos_task_create(&task_demo, "receiver_higher_prio", entry_task_demo, NULL,
                            4, stack_task_demo, STK_SIZE_TASK_DEMO, 0);
  tos_knl_start();
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
		
  }
  /* USER CODE END 3 */
}

 

 

3、運行效果

源碼鏈接：Git