【一起来玩RTOS系列】之RT-Thread 软件定时器-静态方法
除了上篇涉及的动态定时器创建方法，RT-Thread还提供了一个静态的定时器创建方法，使用示例如下：
/**
****************************************************
* File Name : main.c
* Description : Main program body
****************************************************
** This notice applies to any and all portions of this file
* that are not between comment pairs USER CODE BEGIN and
* USER CODE END. Other portions of this file, whether
* inserted by the user or by software development tools
* are owned by their respective copyright owners.
*
* COPYRIGHT(c) 2017 STMicroelectronics
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
****************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "stm32f1xx_hal.h"
#include "usart.h"
#include "gpio.h"
/* USER CODE BEGIN Includes */
#include "rtthread.h"
/* USER CODE END Includes */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
/* Private function prototypes -----------------------------------------------*/
/* USER CODE END PFP */
/* USER CODE BEGIN 0 */
//重映射串口1到rt_kprintf
void rt_hw_console_output(const char *str)
{
/* empty console output */
char aa='\r';
rt_enter_critical();
while(*str!='\0')
{
if(*str=='\n')
{
HAL_UART_Transmit(&huart1, (uint8_t *)&aa, 1, 10);
}
HAL_UART_Transmit(&huart1, (uint8_t *)(str++), 1, 10);
}
rt_exit_critical();
}
//线程LED1
static void led1_thread_entry(void* parameter)
{
while(1)
{
//LED1_Toggle();
rt_thread_delay(500); //延时
rt_kprintf("this is thread 1\r\n");
}
}
//线程LED2
static void led2_thread_entry(void* parameter)
{
while(1)
{
//LED2_Toggle();
rt_thread_delay(100); //延时
rt_kprintf("this is thread 2\r\n");
}
}
/*
* 程序清单：定时器控制接口示例
*
* 这个例程会创建1个动态周期型定时器对象，然后控制它进行更改定时器的时间长度。
*/
#include <rtthread.h>
/* 定时器的控制块 */
struct rt_timer timer1;
static rt_uint8_t count;
/* 定时器超时函数 */
static void timeout1(void* parameter)
{
rt_kprintf("periodic timer is timeout\n");
count ++;
LED3_Toggle();
LED4_Toggle();
/* 当超过4次时，更改定时器的超时长度 */
if (count > 4)
{
int timeout_value = 100;
/* 控制定时器更改定时器超时时间长度 */
rt_timer_control(&timer1, RT_TIMER_CTRL_SET_TIME, (void*)&timeout_value);
count = 0;
}
}
/* USER CODE END 0 */
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 */
rt_thread_t tid1=RT_NULL;//线程句柄
rt_thread_t tid2=RT_NULL;//线程句柄
//创建动态线程
tid1=rt_thread_create("led1",//线程名字
led1_thread_entry,//线程入口函数
RT_NULL,//线程参数
256,//线程栈大小
3,//线程优先级
20);//线程时间片
//启动线程
rt_thread_startup(tid1);
//创建动态线程
tid2=rt_thread_create("led2",//线程名字
led2_thread_entry,//线程入口函数
RT_NULL,//线程参数
256,//线程栈大小
4,//线程优先级
20);//线程时间片
//启动线程
rt_thread_startup(tid2);
/* 创建定时器1 */
rt_timer_init(&timer1,"timer1",/* 定时器名字是 timer1 */
timeout1, /* 超时时回调的处理函数 */
RT_NULL, /* 超时函数的入口参数 */
1000, /* 定时长度，以OS Tick为单位，即1000个OS Tick */
RT_TIMER_FLAG_PERIODIC); /* 周期性定时器 */
/* 启动定时器 */
rt_timer_start(&timer1);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
//while (1)
//{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
//
//}
/* USER CODE END 3 */
}
/** System Clock Configuration
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
/**Initializes the CPU, AHB and APB busses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
/**Initializes the CPU, AHB and APB busses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
/**Configure the Systick interrupt time
*/
HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
/**Configure the Systick
*/
HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
/* SysTick_IRQn interrupt configuration */
HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @briefThis function is executed in case of error occurrence.
* @paramNone
* @retval None
*/
void _Error_Handler(char * file, int line)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
while(1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif
/**
* @}
*/
/**
* @}
*/
/**************** (C) COPYRIGHT STMicroelectronics ****END OF FILE***/
创建定时器后Gokit板载LED每1S闪烁一次，4次后修改定时器为100ms闪烁一次，可以看到实验现象与预期一致：
源码下载：
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