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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 */
- /**
- * @brief This function is executed in case of error occurrence.
- * @param None
- * @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***/
复制代码 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:
Gokit_RT-Thread.zip
(8.63 MB, 下载次数: 3, 售价: 1 金钱)
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