FreeRTOS_SemaphoreFromISR
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Outline
Includes
#include "main.h"
#include "cmsis_os.h"
#define semtstSTACK_SIZE
Private variables
osSemaphore
Private function prototypes
Private functions
main()
SemaphoreTest(const void *)
HAL_GPIO_EXTI_Callback(uint16_t)
SystemClock_Config()
Error_Handler()
Files
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CodeScopeSTM32 Libraries and SamplesFreeRTOS_SemaphoreFromISRSrc/main.c
 
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/** ****************************************************************************** * @file FreeRTOS/FreeRTOS_SemaphoreFromISR/Src/main.c * @author MCD Application Team * @brief Main program body ****************************************************************************** * @attention * * Copyright (c) 2017 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * ****************************************************************************** *//* ... */ /* Includes ------------------------------------------------------------------*/ #include "main.h" #include "cmsis_os.h" Includes /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ #define semtstSTACK_SIZE configMINIMAL_STACK_SIZE /* Private variables ---------------------------------------------------------*/ osSemaphoreId osSemaphore; Private variables /* Private function prototypes -----------------------------------------------*/ static void SemaphoreTest (void const *argument); static void SystemClock_Config(void); static void Error_Handler(void); Private function prototypes /* Private functions ---------------------------------------------------------*/ /** * @brief Main program * @param None * @retval None *//* ... */ int main(void) { /* STM32F4xx HAL library initialization: - Configure the Flash prefetch, instruction and Data caches - Configure the Systick to generate an interrupt each 1 msec - Set NVIC Group Priority to 4 - Global MSP (MCU Support Package) initialization *//* ... */ HAL_Init(); /* Configure the system clock to 180 MHz */ SystemClock_Config(); /* Configure LED1 */ BSP_LED_Init(LED1); /* Configure TAMPER Button */ BSP_PB_Init(BUTTON_TAMPER, BUTTON_MODE_EXTI); /* Define used semaphore */ osSemaphoreDef(SEM); /* Create the semaphore used by the two threads. */ osSemaphore = osSemaphoreCreate(osSemaphore(SEM) , 1); /* Create the Thread that toggle LED1 */ osThreadDef(SEM_Thread, SemaphoreTest, osPriorityNormal, 0, semtstSTACK_SIZE); osThreadCreate(osThread(SEM_Thread), (void *) osSemaphore); /* Start scheduler */ osKernelStart(); /* We should never get here as control is now taken by the scheduler */ for(;;); }{ ... } /** * @brief Semaphore Test. * @param argument: Not used * @retval None *//* ... */ static void SemaphoreTest (void const *argument) { for(;;) { if (osSemaphore != NULL) { /* Try to obtain the semaphore. */ if(osSemaphoreWait(osSemaphore , 0) == osOK) { BSP_LED_Toggle(LED1); }if (osSemaphoreWait(osSemaphore , 0) == osOK) { ... } }if (osSemaphore != NULL) { ... } }for (;;) { ... } }{ ... } /** * @brief EXTI line detection callbacks * @param GPIO_Pin: Specifies the pins connected EXTI line * @retval None *//* ... */ void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin) { osSemaphoreRelease(osSemaphore); }{ ... } /** * @brief System Clock Configuration * The system Clock is configured as follow : * System Clock source = PLL (HSE) * SYSCLK(Hz) = 180000000 * HCLK(Hz) = 180000000 * AHB Prescaler = 1 * APB1 Prescaler = 4 * APB2 Prescaler = 2 * HSE Frequency(Hz) = 8000000 * PLL_M = 8 * PLL_N = 360 * PLL_P = 2 * PLL_Q = 7 * VDD(V) = 3.3 * Main regulator output voltage = Scale1 mode * Flash Latency(WS) = 5 * @param None * @retval None *//* ... */ static void SystemClock_Config(void) { RCC_ClkInitTypeDef RCC_ClkInitStruct; RCC_OscInitTypeDef RCC_OscInitStruct; HAL_StatusTypeDef ret = HAL_OK; /* Enable Power Control clock */ __HAL_RCC_PWR_CLK_ENABLE(); /* The voltage scaling allows optimizing the power consumption when the device is clocked below the maximum system frequency, to update the voltage scaling value regarding system frequency refer to product datasheet. *//* ... */ __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); /* Enable HSE Oscillator and activate PLL with HSE as source */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLM = 8; RCC_OscInitStruct.PLL.PLLN = 360; RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; RCC_OscInitStruct.PLL.PLLQ = 7; RCC_OscInitStruct.PLL.PLLR = 2; ret = HAL_RCC_OscConfig(&RCC_OscInitStruct); if(ret != HAL_OK) { Error_Handler(); }if (ret != HAL_OK) { ... } /* activate the OverDrive to reach the 180 Mhz Frequency */ ret = HAL_PWREx_EnableOverDrive(); if(ret != HAL_OK) { Error_Handler(); }if (ret != HAL_OK) { ... } /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers *//* ... */ RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2); RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5); if(ret != HAL_OK) { Error_Handler(); }if (ret != HAL_OK) { ... } }{ ... } /** * @brief This function is executed in case of error occurrence. * @param None * @retval None *//* ... */ static void Error_Handler(void) { /* Turn LED3 on: Transfer Error */ BSP_LED_On(LED3); while (1) { }while (1) { ... } }{ ... } #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 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) *//* ... */ /* Infinite loop */ while (1) { }while (1) { ... } }assert_failed (uint8_t* file, uint32_t line) { ... } /* ... */#endifPrivate functions