基于stm32 MCU和H桥电路的PWM信号发生器

/** ****************************************************************************** * @file cpu_utils.c * @author MCD Application Team * @version V1.1.0 * @date 20-November-2014 * @brief Utilities for CPU Load calculation ****************************************************************************** * @attention * * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2> * * 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. * ****************************************************************************** */ /********************** NOTES ********************************************** To use this module, the following steps should be followed : 1- in the _OS_Config.h file (ex. FreeRTOSConfig.h) enable the following macros : - #define configUSE_IDLE_HOOK 1 - #define configUSE_TICK_HOOK 1 2- in the _OS_Config.h define the following macros : - #define traceTASK_SWITCHED_IN() extern void StartIdleMonitor(void); \ StartIdleMonitor() - #define traceTASK_SWITCHED_OUT() extern void EndIdleMonitor(void); \ EndIdleMonitor() *******************************************************************************/ /* Includes ------------------------------------------------------------------*/ #include "cpu_utils.h" #include "cmsis_os2.h" /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* Private function prototypes -----------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ osThreadId_t xIdleHandle = NULL; __IO uint32_t osCPU_Usage = 0; uint32_t osCPU_IdleStartTime = 0; uint32_t osCPU_IdleSpentTime = 0; uint32_t osCPU_TotalIdleTime = 0; void vApplicationIdleHook(void) { if( xIdleHandle == NULL ) { /* Store the handle to the idle task. */ xIdleHandle = osThreadGetId(); } } void vApplicationTickHook (void) { static int tick = 0; if(tick ++ > CALCULATION_PERIOD) { tick = 0; if(osCPU_TotalIdleTime > 1000) { osCPU_TotalIdleTime = 1000; } osCPU_Usage = (100 - (osCPU_TotalIdleTime * 100) / CALCULATION_PERIOD); osCPU_TotalIdleTime = 0; } } void StartIdleMonitor (void) { if( osThreadGetId() == xIdleHandle ) { osCPU_IdleStartTime = osKernelGetTickCount(); } } void EndIdleMonitor (void) { if( osThreadGetId() == xIdleHandle ) { osCPU_IdleSpentTime = osKernelGetTickCount() - osCPU_IdleStartTime; osCPU_TotalIdleTime += osCPU_IdleSpentTime; } } uint16_t osGetCPUUsage (void) { return (uint16_t)osCPU_Usage; } /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ void StartCyclesCounter(void) { CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk; DWT->CYCCNT = 0; DWT->CTRL |= DWT_CTRL_CYCCNTENA_Msk; } uint32_t GetCyclesCounter(void) { return DWT->CYCCNT; } void StopCyclesCounter(void) { CoreDebug->DEMCR &= ~CoreDebug_DEMCR_TRCENA_Msk; DWT->CYCCNT = 0; DWT->CTRL &= ~DWT_CTRL_CYCCNTENA_Msk; }