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[Jessy J]

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[Jessy J]

Posted on May 17, 2018 at 15:56

I AM using STM32479I EVAL BOARD and Here is the clock configuration generated by CubMX

void SystemClock_Config(void)

{

RCC_OscInitTypeDef RCC_OscInitStruct;

RCC_ClkInitTypeDef RCC_ClkInitStruct; RCC_PeriphCLKInitTypeDef PeriphClkInitStruct; HAL_StatusTypeDef ret = HAL_OK;

/**Configure the main internal regulator output voltage

*/ __HAL_RCC_PWR_CLK_ENABLE();

__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE3);

/**Initializes the CPU, AHB and APB busses clocks

*/ 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 = 15; RCC_OscInitStruct.PLL.PLLN = 144; RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; RCC_OscInitStruct.PLL.PLLQ = 5; RCC_OscInitStruct.PLL.PLLR = 2; ret = HAL_RCC_OscConfig(&RCC_OscInitStruct);

if(ret != HAL_OK)

{ Error_Handler(); }

/**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_DIV4; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;

if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK)

{ _Error_Handler(__FILE__, __LINE__); }

PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_SDIO|RCC_PERIPHCLK_CLK48;

PeriphClkInitStruct.Clk48ClockSelection = RCC_CLK48CLKSOURCE_PLLQ; PeriphClkInitStruct.SdioClockSelection = RCC_SDIOCLKSOURCE_CLK48; if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != 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, 15, 0);}

[Tesla DeLorean]

Posted on May 24, 2018 at 03:39

/* SysTick_IRQn interrupt configuration */

HAL_NVIC_SetPriority(SysTick_IRQn, 15, 0); // Least priority, worst possible setting for a value you expect to tick under interrupt context everywhere else

  /* Set Systick interrupt in high priority for HAL_Delay() */

  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0); // Use this to ensure it fires

The HAL_NVIC_SetPriorityGrouping() should create 16 levels of preemption

/**

  * @brief This function configures the source of the time base:  *        The time source is configured to have 1ms time base with a dedicated  *        Tick interrupt priority.  * @note This function is called  automatically at the beginning of program after  *       reset by HAL_Init() or at any time when clock is reconfigured  by HAL_RCC_ClockConfig().  * @note In the default implementation, SysTick timer is the source of time base.  *       It is used to generate interrupts at regular time intervals.  *       Care must be taken if HAL_Delay() is called from a peripheral ISR process,  *       The SysTick interrupt must have higher priority (numerically lower)  *       than the peripheral interrupt. Otherwise the caller ISR process will be blocked.  *       The function is declared as __weak  to be overwritten  in case of other  *       implementation  in user file.  * @param TickPriority  Tick interrupt priority.  * @retval HAL status  */__weak HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority){  /*Configure the SysTick to have interrupt in 1ms time basis*/  HAL_SYSTICK_Config(SystemCoreClock/1000);

  /*Configure the SysTick IRQ priority */

  HAL_NVIC_SetPriority(SysTick_IRQn, TickPriority ,0);

  /* Return function status */

  return HAL_OK;}