318 lines
8.3 KiB
C
318 lines
8.3 KiB
C
/* USER CODE BEGIN Header */
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/**
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******************************************************************************
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* @file Examples_LL/HSEM/HSEM_DualProcess/Src/main.c
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* @author MCD Application Team
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* @brief This example describes how to use HSEM peripheral to lock and unlock
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* hardware semaphore in the context of two process accessing the same
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* semaphore using the STM32WLxx HSEM LL API.
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* Peripheral initialization done using LL unitary services functions.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2020 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* USER CODE END Header */
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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/* Private includes ----------------------------------------------------------*/
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/* USER CODE BEGIN Includes */
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/* USER CODE END Includes */
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/* Private typedef -----------------------------------------------------------*/
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/* USER CODE BEGIN PTD */
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/* USER CODE END PTD */
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/* Private define ------------------------------------------------------------*/
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/* USER CODE BEGIN PD */
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/* USER CODE END PD */
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/* Private macro -------------------------------------------------------------*/
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/* USER CODE BEGIN PM */
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/* USER CODE END PM */
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/* Private variables ---------------------------------------------------------*/
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/* USER CODE BEGIN PV */
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/* USER CODE END PV */
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/* Private function prototypes -----------------------------------------------*/
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void SystemClock_Config(void);
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static void MX_GPIO_Init(void);
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/* USER CODE BEGIN PFP */
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void Configure_HSEM(void);
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void LED_On(void);
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void LED_Blinking(uint32_t Period);
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/* USER CODE END PFP */
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/* Private user code ---------------------------------------------------------*/
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/* USER CODE BEGIN 0 */
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/* USER CODE END 0 */
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/**
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* @brief The application entry point.
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* @retval int
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*/
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int main(void)
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{
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/* USER CODE BEGIN 1 */
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uint32_t lockStatus = 0;
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uint32_t currentProcess = 0;
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uint32_t currentCore = 0;
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/* USER CODE END 1 */
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/* MCU Configuration--------------------------------------------------------*/
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/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
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/* System interrupt init*/
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NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);
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/* USER CODE BEGIN Init */
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/* USER CODE END Init */
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/* Configure the system clock */
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SystemClock_Config();
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/* USER CODE BEGIN SysInit */
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/* USER CODE END SysInit */
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/* Initialize all configured peripherals */
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MX_GPIO_Init();
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/* USER CODE BEGIN 2 */
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/* Configure HSEM */
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Configure_HSEM();
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/* PROCESS_A takes the semaphore with success */
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lockStatus = LL_HSEM_2StepLock(HSEM, SEMAPHORE_ID, PROCESS_A);
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if(lockStatus != 0)
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{
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LED_Blinking(LED_BLINK_ERROR);
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}
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/* PROCESS_B takes the semaphore and fail (as already taken by PROCESS_A) */
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lockStatus = LL_HSEM_2StepLock(HSEM, SEMAPHORE_ID, PROCESS_B);
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if(lockStatus != 1)
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{
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LED_Blinking(LED_BLINK_ERROR);
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}
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/* PROCESS_B releases the semaphore and fail (as owned by PROCESS_A) */
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LL_HSEM_ReleaseLock(HSEM, SEMAPHORE_ID, PROCESS_B);
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/* The status of the semaphore is observed using LL_HSEM_GetStatus */
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lockStatus = LL_HSEM_GetStatus(HSEM, SEMAPHORE_ID);
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if(lockStatus != 1)
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{
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LED_Blinking(LED_BLINK_ERROR);
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}
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/* The current process locking the semaphore is observed using LL_HSEM_GetProcessId */
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currentProcess = LL_HSEM_GetProcessId(HSEM, SEMAPHORE_ID);
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if(currentProcess != PROCESS_A)
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{
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LED_Blinking(LED_BLINK_ERROR);
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}
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/* In multicore environment, the current core locking the semaphore is observed using LL_HSEM_GetCoreId */
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/* In this example, only one core is used and so only possible values are LL_HSEM_COREID_NONE or LL_HSEM_COREID_CPU1 */
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currentCore = LL_HSEM_GetCoreId(HSEM, SEMAPHORE_ID);
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if(currentCore != LL_HSEM_COREID_CPU1)
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{
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LED_Blinking(LED_BLINK_ERROR);
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}
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/* PROCESS_A releases the semaphore with success */
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LL_HSEM_ReleaseLock(HSEM, SEMAPHORE_ID, PROCESS_A);
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/* The status of the semaphore is observed using LL_HSEM_GetStatus */
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lockStatus = LL_HSEM_GetStatus(HSEM, SEMAPHORE_ID);
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if(lockStatus != 0)
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{
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LED_Blinking(LED_BLINK_ERROR);
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}
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LED_On();
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/* USER CODE END 2 */
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/* Infinite loop */
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/* USER CODE BEGIN WHILE */
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while (1)
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{
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/* USER CODE END WHILE */
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/* USER CODE BEGIN 3 */
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}
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/* USER CODE END 3 */
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}
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/**
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* @brief System Clock Configuration
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* @retval None
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*/
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void SystemClock_Config(void)
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{
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LL_FLASH_SetLatency(LL_FLASH_LATENCY_2);
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while(LL_FLASH_GetLatency() != LL_FLASH_LATENCY_2)
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{
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}
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LL_PWR_SetRegulVoltageScaling(LL_PWR_REGU_VOLTAGE_SCALE1);
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LL_RCC_MSI_Enable();
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/* Wait till MSI is ready */
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while(LL_RCC_MSI_IsReady() != 1)
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{
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}
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LL_RCC_MSI_EnableRangeSelection();
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LL_RCC_MSI_SetRange(LL_RCC_MSIRANGE_11);
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LL_RCC_MSI_SetCalibTrimming(0);
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LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_MSI);
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/* Wait till System clock is ready */
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while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_MSI)
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{
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}
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LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
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LL_RCC_SetAHB3Prescaler(LL_RCC_SYSCLK_DIV_1);
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LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
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LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
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LL_Init1msTick(48000000);
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/* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
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LL_SetSystemCoreClock(48000000);
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}
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/**
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* @brief GPIO Initialization Function
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* @param None
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* @retval None
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*/
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static void MX_GPIO_Init(void)
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{
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LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
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/* GPIO Ports Clock Enable */
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LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOB);
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/**/
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LL_GPIO_ResetOutputPin(LED2_GPIO_Port, LED2_Pin);
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/**/
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GPIO_InitStruct.Pin = LED2_Pin;
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GPIO_InitStruct.Mode = LL_GPIO_MODE_OUTPUT;
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GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
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GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
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GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
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LL_GPIO_Init(LED2_GPIO_Port, &GPIO_InitStruct);
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}
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/* USER CODE BEGIN 4 */
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/**
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* @brief This function configures HSEM Instance.
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* @note This function is used to :
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* - Enable peripheral clock for HSEM.
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* @param None
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* @retval None
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*/
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void Configure_HSEM(void)
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{
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/* Enable peripheral clock for RNG */
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LL_AHB3_GRP1_EnableClock(LL_AHB3_GRP1_PERIPH_HSEM);
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}
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/**
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* @brief Turn-on LED2.
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* @param None
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* @retval None
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*/
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void LED_On(void)
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{
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/* Turn LED2 on */
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LL_GPIO_SetOutputPin(LED2_GPIO_Port, LED2_Pin);
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}
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/**
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* @brief Set LED2 to Blinking mode for an infinite loop (toggle period based on value provided as input parameter).
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* @param Period : Period of time (in ms) between each toggling of LED
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* This parameter can be user defined values. Pre-defined values used in that example are :
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* @arg LED_BLINK_FAST : Fast Blinking
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* @arg LED_BLINK_SLOW : Slow Blinking
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* @arg LED_BLINK_ERROR : Error specific Blinking
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* @retval None
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*/
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void LED_Blinking(uint32_t Period)
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{
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/* Toggle LED2 in an infinite loop */
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while (1)
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{
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LL_GPIO_TogglePin(LED2_GPIO_Port, LED2_Pin);
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LL_mDelay(Period);
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}
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}
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/* USER CODE END 4 */
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/**
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* @brief This function is executed in case of error occurrence.
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* @retval None
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*/
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void Error_Handler(void)
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{
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/* USER CODE BEGIN Error_Handler_Debug */
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/* User can add his own implementation to report the HAL error return state */
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/* USER CODE END Error_Handler_Debug */
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}
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#ifdef USE_FULL_ASSERT
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/**
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* @brief Reports the name of the source file and the source line number
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* where the assert_param error has occurred.
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* @param file: pointer to the source file name
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* @param line: assert_param error line source number
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* @retval None
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*/
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void assert_failed(uint8_t *file, uint32_t line)
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{
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/* USER CODE BEGIN 6 */
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/* User can add his own implementation to report the file name and line number,
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ex: printf("Wrong parameters value: file %s on line %d", file, line) */
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/* Infinite loop */
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while (1)
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{
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}
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/* USER CODE END 6 */
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}
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#endif /* USE_FULL_ASSERT */
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