/** ****************************************************************************** * @file system_stm32l4xx.c * @author MCD Application Team * @version V1.1.1 * @date 29-April-2016 * @brief CMSIS Cortex-M4 Device Peripheral Access Layer System Source File * * This file provides two functions and one global variable to be called from * user application: * - SystemInit(): This function is called at startup just after reset and * before branch to main program. This call is made inside * the "startup_stm32l4xx.s" file. * * - SystemCoreClock variable: Contains the core clock (HCLK), it can be used * by the user application to setup the SysTick * timer or configure other parameters. * * - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must * be called whenever the core clock is changed * during program execution. * * After each device reset the MSI (4 MHz) is used as system clock source. * Then SystemInit() function is called, in "startup_stm32l4xx.s" file, to * configure the system clock before to branch to main program. * * This file configures the system clock as follows: *============================================================================= * System clock source | 1- PLL_HSE_EXTC | 3- PLL_HSI * | (external 8 MHz clock) | (internal 16 MHz) * | 2- PLL_HSE_XTAL | or PLL_MSI * | (external 8 MHz xtal) | (internal 4 MHz) *----------------------------------------------------------------------------- * SYSCLK(MHz) | 48 | 80 *----------------------------------------------------------------------------- * AHBCLK (MHz) | 48 | 80 *----------------------------------------------------------------------------- * APB1CLK (MHz) | 48 | 80 *----------------------------------------------------------------------------- * APB2CLK (MHz) | 48 | 80 *----------------------------------------------------------------------------- * USB capable (48 MHz precise clock) | YES | NO *----------------------------------------------------------------------------- *============================================================================= ****************************************************************************** * @attention * * <h2><center>© COPYRIGHT(c) 2016 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. * ****************************************************************************** */ /** @addtogroup CMSIS * @{ */ /** @addtogroup stm32l4xx_system * @{ */ /** @addtogroup STM32L4xx_System_Private_Includes * @{ */ #include "stm32l4xx.h" #include "hal_tick.h" #if !defined (HSE_VALUE) #define HSE_VALUE ((uint32_t)8000000) /*!< Value of the External oscillator in Hz */ #endif /* HSE_VALUE */ #if !defined (MSI_VALUE) #define MSI_VALUE ((uint32_t)4000000) /*!< Value of the Internal oscillator in Hz*/ #endif /* MSI_VALUE */ #if !defined (HSI_VALUE) #define HSI_VALUE ((uint32_t)16000000) /*!< Value of the Internal oscillator in Hz*/ #endif /* HSI_VALUE */ /** * @} */ /** @addtogroup STM32L4xx_System_Private_TypesDefinitions * @{ */ /** * @} */ /** @addtogroup STM32L4xx_System_Private_Defines * @{ */ /************************* Miscellaneous Configuration ************************/ /*!< Uncomment the following line if you need to relocate your vector Table in Internal SRAM. */ /* #define VECT_TAB_SRAM */ #define VECT_TAB_OFFSET 0x00 /*!< Vector Table base offset field. This value must be a multiple of 0x200. */ /******************************************************************************/ /** * @} */ /** @addtogroup STM32L4xx_System_Private_Macros * @{ */ // Select the clock sources (default is PLL_MSI) to start with (0=OFF, 1=ON) #define USE_PLL_HSE_EXTC (1) // Use external clock #define USE_PLL_HSE_XTAL (0) // Use external xtal #define USE_PLL_HSI (0) // Use HSI/MSI internal clock (0=MSI, 1=HSI) #define DEBUG_MCO (0) // Output the MCO on PA8 for debugging (0=OFF, 1=SYSCLK, 2=HSE, 3=HSI, 4=MSI) /** * @} */ /** @addtogroup STM32L4xx_System_Private_Variables * @{ */ /* The SystemCoreClock variable is updated in three ways: 1) by calling CMSIS function SystemCoreClockUpdate() 2) by calling HAL API function HAL_RCC_GetHCLKFreq() 3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency Note: If you use this function to configure the system clock; then there is no need to call the 2 first functions listed above, since SystemCoreClock variable is updated automatically. */ uint32_t SystemCoreClock = 4000000; const uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9}; const uint8_t APBPrescTable[8] = {0, 0, 0, 0, 1, 2, 3, 4}; const uint32_t MSIRangeTable[12] = {100000, 200000, 400000, 800000, 1000000, 2000000, \ 4000000, 8000000, 16000000, 24000000, 32000000, 48000000}; /** * @} */ /** @addtogroup STM32L4xx_System_Private_FunctionPrototypes * @{ */ #if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0) uint8_t SetSysClock_PLL_HSE(uint8_t bypass); #endif #if (USE_PLL_HSI != 0) uint8_t SetSysClock_PLL_HSI(void); #endif uint8_t SetSysClock_PLL_MSI(void); /** * @} */ /** @addtogroup STM32L4xx_System_Private_Functions * @{ */ /** * @brief Setup the microcontroller system. * @param None * @retval None */ void SystemInit(void) { /* FPU settings ------------------------------------------------------------*/ #if (__FPU_PRESENT == 1) && (__FPU_USED == 1) SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */ #endif /* Reset the RCC clock configuration to the default reset state ------------*/ /* Set MSION bit */ RCC->CR |= RCC_CR_MSION; /* Reset CFGR register */ RCC->CFGR = 0x00000000; /* Reset HSEON, CSSON , HSION, and PLLON bits */ RCC->CR &= (uint32_t)0xEAF6FFFF; /* Reset PLLCFGR register */ RCC->PLLCFGR = 0x00001000; /* Reset HSEBYP bit */ RCC->CR &= (uint32_t)0xFFFBFFFF; /* Disable all interrupts */ RCC->CIER = 0x00000000; /* Configure the Vector Table location add offset address ------------------*/ #ifdef VECT_TAB_SRAM SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */ #else SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */ #endif /* Configure the Cube driver */ SystemCoreClock = MSI_VALUE; // At this stage the MSI is used as system clock HAL_Init(); /* Configure the System clock source, PLL Multiplier and Divider factors, AHB/APBx prescalers and Flash settings */ SetSysClock(); /* Reset the timer to avoid issues after the RAM initialization */ TIM_MST_RESET_ON; TIM_MST_RESET_OFF; } /** * @brief Update SystemCoreClock variable according to Clock Register Values. * The SystemCoreClock variable contains the core clock (HCLK), it can * be used by the user application to setup the SysTick timer or configure * other parameters. * * @note Each time the core clock (HCLK) changes, this function must be called * to update SystemCoreClock variable value. Otherwise, any configuration * based on this variable will be incorrect. * * @note - The system frequency computed by this function is not the real * frequency in the chip. It is calculated based on the predefined * constant and the selected clock source: * * - If SYSCLK source is MSI, SystemCoreClock will contain the MSI_VALUE(*) * * - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(**) * * - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(***) * * - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(***) * or HSI_VALUE(*) or MSI_VALUE(*) multiplied/divided by the PLL factors. * * (*) MSI_VALUE is a constant defined in stm32l4xx_hal.h file (default value * 4 MHz) but the real value may vary depending on the variations * in voltage and temperature. * * (**) HSI_VALUE is a constant defined in stm32l4xx_hal.h file (default value * 16 MHz) but the real value may vary depending on the variations * in voltage and temperature. * * (***) HSE_VALUE is a constant defined in stm32l4xx_hal.h file (default value * 8 MHz), user has to ensure that HSE_VALUE is same as the real * frequency of the crystal used. Otherwise, this function may * have wrong result. * * - The result of this function could be not correct when using fractional * value for HSE crystal. * * @param None * @retval None */ void SystemCoreClockUpdate(void) { uint32_t tmp = 0, msirange = 0, pllvco = 0, pllr = 2, pllsource = 0, pllm = 2; /* Get MSI Range frequency--------------------------------------------------*/ if((RCC->CR & RCC_CR_MSIRGSEL) == RESET) { /* MSISRANGE from RCC_CSR applies */ msirange = (RCC->CSR & RCC_CSR_MSISRANGE) >> 8; } else { /* MSIRANGE from RCC_CR applies */ msirange = (RCC->CR & RCC_CR_MSIRANGE) >> 4; } /*MSI frequency range in HZ*/ msirange = MSIRangeTable[msirange]; /* Get SYSCLK source -------------------------------------------------------*/ switch (RCC->CFGR & RCC_CFGR_SWS) { case 0x00: /* MSI used as system clock source */ SystemCoreClock = msirange; break; case 0x04: /* HSI used as system clock source */ SystemCoreClock = HSI_VALUE; break; case 0x08: /* HSE used as system clock source */ SystemCoreClock = HSE_VALUE; break; case 0x0C: /* PLL used as system clock source */ /* PLL_VCO = (HSE_VALUE or HSI_VALUE or MSI_VALUE/ PLLM) * PLLN SYSCLK = PLL_VCO / PLLR */ pllsource = (RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC); pllm = ((RCC->PLLCFGR & RCC_PLLCFGR_PLLM) >> 4) + 1 ; switch (pllsource) { case 0x02: /* HSI used as PLL clock source */ pllvco = (HSI_VALUE / pllm); break; case 0x03: /* HSE used as PLL clock source */ pllvco = (HSE_VALUE / pllm); break; default: /* MSI used as PLL clock source */ pllvco = (msirange / pllm); break; } pllvco = pllvco * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 8); pllr = (((RCC->PLLCFGR & RCC_PLLCFGR_PLLR) >> 25) + 1) * 2; SystemCoreClock = pllvco/pllr; break; default: SystemCoreClock = msirange; break; } /* Compute HCLK clock frequency --------------------------------------------*/ /* Get HCLK prescaler */ tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)]; /* HCLK clock frequency */ SystemCoreClock >>= tmp; } /** * @brief Configures the System clock source, PLL Multiplier and Divider factors, * AHB/APBx prescalers and Flash settings * @note This function should be called only once the RCC clock configuration * is reset to the default reset state (done in SystemInit() function). * @param None * @retval None */ void SetSysClock(void) { /* 1- Try to start with HSE and external clock */ #if USE_PLL_HSE_EXTC != 0 if (SetSysClock_PLL_HSE(1) == 0) #endif { /* 2- If fail try to start with HSE and external xtal */ #if USE_PLL_HSE_XTAL != 0 if (SetSysClock_PLL_HSE(0) == 0) #endif { /* 3- If fail start with HSI or MSI clock */ #if (USE_PLL_HSI != 0) if (SetSysClock_PLL_HSI() == 0) #else if (SetSysClock_PLL_MSI() == 0) #endif { while(1) { // [TODO] Put something here to tell the user that a problem occured... } } } } // Output clock on MCO1 pin(PA8) for debugging purpose #if DEBUG_MCO == 1 HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_SYSCLK, RCC_MCODIV_1); #endif } #if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0) /******************************************************************************/ /* PLL (clocked by HSE) used as System clock source */ /******************************************************************************/ uint8_t SetSysClock_PLL_HSE(uint8_t bypass) { RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; RCC_OscInitTypeDef RCC_OscInitStruct = {0}; // Used to gain time after DeepSleep in case HSI is used if (__HAL_RCC_GET_FLAG(RCC_FLAG_HSIRDY) != RESET) { return 0; } // Select MSI as system clock source to allow modification of the PLL configuration RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI; HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0); // Enable HSE oscillator and activate PLL with HSE as source RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_HSI; if (bypass == 0) { RCC_OscInitStruct.HSEState = RCC_HSE_ON; // External 8 MHz xtal on OSC_IN/OSC_OUT } else { RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; // External 8 MHz clock on OSC_IN } RCC_OscInitStruct.HSIState = RCC_HSI_OFF; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; // 8 MHz RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; // Non-USB configuration : sysclock = 80MHz //RCC_OscInitStruct.PLL.PLLM = 1; // VCO input clock = 8 MHz (8 MHz / 1) //RCC_OscInitStruct.PLL.PLLN = 20; // VCO output clock = 160 MHz (8 MHz * 20) //RCC_OscInitStruct.PLL.PLLP = 7; // PLLSAI3 clock = 22 MHz (160 MHz / 7) //RCC_OscInitStruct.PLL.PLLQ = 4; // USB clock (PLL48M1) = 40 MHz (160 MHz / 4) --> Not good for USB //RCC_OscInitStruct.PLL.PLLR = 2; // PLL clock = 80 MHz (160 MHz / 2) // USB configuration : sysclock = 48 MHz RCC_OscInitStruct.PLL.PLLM = 1; // VCO input clock = 8 MHz (8 MHz / 1) RCC_OscInitStruct.PLL.PLLN = 24; // VCO output clock = 192 MHz (8 MHz * 24) RCC_OscInitStruct.PLL.PLLP = 7; // PLLSAI3 clock = 27.4 MHz (192 MHz / 7) RCC_OscInitStruct.PLL.PLLQ = 4; // USB clock (PLL48M1) = 48 MHz (192 MHz / 4) --> OK for USB RCC_OscInitStruct.PLL.PLLR = 4; // PLL clock = 48 MHz (192 MHz / 4) if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { return 0; // FAIL } // Select PLL clock 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; // 80 MHz or 48 MHz RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 80 MHz or 48 MHz RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; // 80 MHz or 48 MHz RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 80 MHz or 48 MHz if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK) { return 0; // FAIL } // Disable MSI Oscillator RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI; RCC_OscInitStruct.MSIState = RCC_MSI_OFF; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // No PLL update HAL_RCC_OscConfig(&RCC_OscInitStruct); // Output clock on MCO1 pin(PA8) for debugging purpose #if DEBUG_MCO == 2 if (bypass == 0) HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_2); // 4 MHz else HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_1); // 8 MHz #endif return 1; // OK } #endif #if (USE_PLL_HSI != 0) /******************************************************************************/ /* PLL (clocked by HSI) used as System clock source */ /******************************************************************************/ uint8_t SetSysClock_PLL_HSI(void) { RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; RCC_OscInitTypeDef RCC_OscInitStruct = {0}; // Select MSI as system clock source to allow modification of the PLL configuration RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI; HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0); // Enable HSI oscillator and activate PLL with HSI as source RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_OFF; RCC_OscInitStruct.HSIState = RCC_HSI_ON; RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI; // 16 MHz RCC_OscInitStruct.PLL.PLLM = 2; // VCO input clock = 8 MHz (16 MHz / 2) RCC_OscInitStruct.PLL.PLLN = 20; // VCO output clock = 160 MHz (8 MHz * 20) RCC_OscInitStruct.PLL.PLLP = 7; // PLLSAI3 clock = 22 MHz (160 MHz / 7) RCC_OscInitStruct.PLL.PLLQ = 4; // USB clock (PLL48M1) = 40 MHz (160 MHz / 4) --> Not good for USB RCC_OscInitStruct.PLL.PLLR = 2; // PLL clock = 80 MHz (160 MHz / 2) if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { return 0; // FAIL } // 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; // 80 MHz RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 80 MHz RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; // 80 MHz RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 80 MHz if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK) { return 0; // FAIL } // Disable MSI Oscillator RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI; RCC_OscInitStruct.MSIState = RCC_MSI_OFF; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // No PLL update HAL_RCC_OscConfig(&RCC_OscInitStruct); // Output clock on MCO1 pin(PA8) for debugging purpose #if DEBUG_MCO == 3 HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSI, RCC_MCODIV_1); // 16 MHz #endif return 1; // OK } #endif /******************************************************************************/ /* PLL (clocked by MSI) used as System clock source */ /******************************************************************************/ uint8_t SetSysClock_PLL_MSI(void) { RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; RCC_OscInitTypeDef RCC_OscInitStruct = {0}; // Enable LSE Oscillator to automatically calibrate the MSI clock RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // No PLL update RCC_OscInitStruct.LSEState = RCC_LSE_ON; // External 32.768 kHz clock on OSC_IN/OSC_OUT if (HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) { RCC->CR |= RCC_CR_MSIPLLEN; // Enable MSI PLL-mode } // Enable MSI oscillator and activate PLL with MSI as source RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI | RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.MSIState = RCC_MSI_ON; RCC_OscInitStruct.HSEState = RCC_HSE_OFF; RCC_OscInitStruct.HSIState = RCC_HSI_OFF; RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6; RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI; // 4 MHz RCC_OscInitStruct.PLL.PLLM = 1; // VCO input clock = 4 MHz (4 MHz / 1) RCC_OscInitStruct.PLL.PLLN = 40; // VCO output clock = 160 MHz (4 MHz * 40) RCC_OscInitStruct.PLL.PLLP = 7; // PLLSAI3 clock = 22.86 MHz (160 MHz / 7) RCC_OscInitStruct.PLL.PLLQ = 4; // USB clock (PLL48M1) = 40 MHz (160 MHz / 4) --> Not good for USB RCC_OscInitStruct.PLL.PLLR = 2; // PLL clock = 80 MHz (160 MHz / 2) if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { return 0; // FAIL } // 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; // 80 MHz RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 80 MHz RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; // 80 MHz RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 80 MHz if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK) { return 0; // FAIL } // Output clock on MCO1 pin(PA8) for debugging purpose #if DEBUG_MCO == 4 HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_MSI, RCC_MCODIV_2); // 2 MHz #endif return 1; // OK } /** * @} */ /** * @} */ /** * @} */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/