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Diff: targets/cmsis/TARGET_STM/TARGET_STM32F4/TARGET_UBLOX_C029/system_stm32f4xx.c
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- 144:ef7eb2e8f9f7
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diff -r 423e1876dc07 -r ef7eb2e8f9f7 targets/cmsis/TARGET_STM/TARGET_STM32F4/TARGET_UBLOX_C029/system_stm32f4xx.c --- a/targets/cmsis/TARGET_STM/TARGET_STM32F4/TARGET_UBLOX_C029/system_stm32f4xx.c Tue Aug 02 14:07:36 2016 +0000 +++ b/targets/cmsis/TARGET_STM/TARGET_STM32F4/TARGET_UBLOX_C029/system_stm32f4xx.c Fri Sep 02 15:07:44 2016 +0100 @@ -1,709 +1,950 @@ -/** - ****************************************************************************** - * @file system_stm32f4xx.c - * @author MCD Application Team - * @version V2.1.0 - * @date 19-June-2014 - * @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_stm32f4xx.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. - * - * 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 | - * | (external 8 MHz xtal) | - *----------------------------------------------------------------------------- - * SYSCLK(MHz) | 100 | 100 - *----------------------------------------------------------------------------- - * AHBCLK (MHz) | 100 | 100 - *----------------------------------------------------------------------------- - * APB1CLK (MHz) | 50 | 50 - *----------------------------------------------------------------------------- - * APB2CLK (MHz) | 100 | 100 - *----------------------------------------------------------------------------- - * USB capable (48 MHz precise clock) | NO | NO - *----------------------------------------------------------------------------- - ****************************************************************************** - * @attention - * - * <h2><center>© COPYRIGHT 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. - * - ****************************************************************************** - */ - -/** @addtogroup CMSIS - * @{ - */ - -/** @addtogroup stm32f4xx_system - * @{ - */ - -/** @addtogroup STM32F4xx_System_Private_Includes - * @{ - */ - - -#include "stm32f4xx.h" -#include "hal_tick.h" - -#if !defined (HSE_VALUE) - #define HSE_VALUE ((uint32_t)8000000) /*!< Default value of the External oscillator in Hz */ -#endif /* HSE_VALUE */ - -#if !defined (HSI_VALUE) - #define HSI_VALUE ((uint32_t)16000000) /*!< Value of the Internal oscillator in Hz*/ -#endif /* HSI_VALUE */ - -/** - * @} - */ - -/** @addtogroup STM32F4xx_System_Private_TypesDefinitions - * @{ - */ - -/** - * @} - */ - -/** @addtogroup STM32F4xx_System_Private_Defines - * @{ - */ - -/************************* Miscellaneous Configuration ************************/ -/*!< Uncomment the following line if you need to use external SRAM or SDRAM mounted - on STM324xG_EVAL/STM324x9I_EVAL boards as data memory */ -#if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx) || defined(STM32F417xx) || defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) -/* #define DATA_IN_ExtSRAM */ -#endif /* STM32F405xx || STM32F415xx || STM32F407xx || STM32F417xx || STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */ - -#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) -/* #define DATA_IN_ExtSDRAM */ -#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */ - -#if defined(DATA_IN_ExtSRAM) && defined(DATA_IN_ExtSDRAM) - #error "Please select DATA_IN_ExtSRAM or DATA_IN_ExtSDRAM " -#endif /* DATA_IN_ExtSRAM && DATA_IN_ExtSDRAM */ - -/*!< 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 STM32F4xx_System_Private_Macros - * @{ - */ - -/* Select the clock sources (other than HSI) to start with (0=OFF, 1=ON) */ -#define USE_PLL_HSE_EXTC (0) /* Use external clock */ -#define USE_PLL_HSE_XTAL (1) /* Use external xtal */ - -/** - * @} - */ - -/** @addtogroup STM32F4xx_System_Private_Variables - * @{ - */ - /* This 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 = 16000000; -const uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9}; - -/** - * @} - */ - -/** @addtogroup STM32F4xx_System_Private_FunctionPrototypes - * @{ - */ - -#if defined (DATA_IN_ExtSRAM) || defined (DATA_IN_ExtSDRAM) - static void SystemInit_ExtMemCtl(void); -#endif /* DATA_IN_ExtSRAM || DATA_IN_ExtSDRAM */ - -#if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0) -uint8_t SetSysClock_PLL_HSE(uint8_t bypass); -#endif - -uint8_t SetSysClock_PLL_HSI(void); - -/** - * @} - */ - -/** @addtogroup STM32F4xx_System_Private_Functions - * @{ - */ - -/** - * @brief Setup the microcontroller system - * Initialize the FPU setting, vector table location and External memory - * configuration. - * @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 HSION bit */ - RCC->CR |= (uint32_t)0x00000001; - - /* Reset CFGR register */ - RCC->CFGR = 0x00000000; - - /* Reset HSEON, CSSON and PLLON bits */ - RCC->CR &= (uint32_t)0xFEF6FFFF; - - /* Reset PLLCFGR register */ - RCC->PLLCFGR = 0x24003010; - - /* Reset HSEBYP bit */ - RCC->CR &= (uint32_t)0xFFFBFFFF; - - /* Disable all interrupts */ - RCC->CIR = 0x00000000; - -#if defined (DATA_IN_ExtSRAM) || defined (DATA_IN_ExtSDRAM) - SystemInit_ExtMemCtl(); -#endif /* DATA_IN_ExtSRAM || DATA_IN_ExtSDRAM */ - - /* 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 = 16000000; // At this stage the HSI 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 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(*) multiplied/divided by the PLL factors. - * - * (*) HSI_VALUE is a constant defined in stm32f4xx_hal_conf.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 stm32f4xx_hal_conf.h file (its value - * depends on the application requirements), 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, pllvco = 0, pllp = 2, pllsource = 0, pllm = 2; - - /* Get SYSCLK source -------------------------------------------------------*/ - tmp = RCC->CFGR & RCC_CFGR_SWS; - - switch (tmp) - { - case 0x00: /* HSI used as system clock source */ - SystemCoreClock = HSI_VALUE; - break; - case 0x04: /* HSE used as system clock source */ - SystemCoreClock = HSE_VALUE; - break; - case 0x08: /* PLL used as system clock source */ - - /* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLL_M) * PLL_N - SYSCLK = PLL_VCO / PLL_P - */ - pllsource = (RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC) >> 22; - pllm = RCC->PLLCFGR & RCC_PLLCFGR_PLLM; - - if (pllsource != 0) - { - /* HSE used as PLL clock source */ - pllvco = (HSE_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 6); - } - else - { - /* HSI used as PLL clock source */ - pllvco = (HSI_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 6); - } - - pllp = (((RCC->PLLCFGR & RCC_PLLCFGR_PLLP) >>16) + 1 ) *2; - SystemCoreClock = pllvco/pllp; - break; - default: - SystemCoreClock = HSI_VALUE; - break; - } - /* Compute HCLK frequency --------------------------------------------------*/ - /* Get HCLK prescaler */ - tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)]; - /* HCLK frequency */ - SystemCoreClock >>= tmp; -} - -#if defined (DATA_IN_ExtSRAM) || defined (DATA_IN_ExtSDRAM) -/** - * @brief Setup the external memory controller. - * Called in startup_stm32f4xx.s before jump to main. - * This function configures the external memories (SRAM/SDRAM) - * This SRAM/SDRAM will be used as program data memory (including heap and stack). - * @param None - * @retval None - */ -void SystemInit_ExtMemCtl(void) -{ -#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) -#if defined (DATA_IN_ExtSDRAM) - register uint32_t tmpreg = 0, timeout = 0xFFFF; - register uint32_t index; - - /* Enable GPIOC, GPIOD, GPIOE, GPIOF, GPIOG, GPIOH and GPIOI interface - clock */ - RCC->AHB1ENR |= 0x000001F8; - - /* Connect PDx pins to FMC Alternate function */ - GPIOD->AFR[0] = 0x000000CC; - GPIOD->AFR[1] = 0xCC000CCC; - /* Configure PDx pins in Alternate function mode */ - GPIOD->MODER = 0xA02A000A; - /* Configure PDx pins speed to 50 MHz */ - GPIOD->OSPEEDR = 0xA02A000A; - /* Configure PDx pins Output type to push-pull */ - GPIOD->OTYPER = 0x00000000; - /* No pull-up, pull-down for PDx pins */ - GPIOD->PUPDR = 0x00000000; - - /* Connect PEx pins to FMC Alternate function */ - GPIOE->AFR[0] = 0xC00000CC; - GPIOE->AFR[1] = 0xCCCCCCCC; - /* Configure PEx pins in Alternate function mode */ - GPIOE->MODER = 0xAAAA800A; - /* Configure PEx pins speed to 50 MHz */ - GPIOE->OSPEEDR = 0xAAAA800A; - /* Configure PEx pins Output type to push-pull */ - GPIOE->OTYPER = 0x00000000; - /* No pull-up, pull-down for PEx pins */ - GPIOE->PUPDR = 0x00000000; - - /* Connect PFx pins to FMC Alternate function */ - GPIOF->AFR[0] = 0xCCCCCCCC; - GPIOF->AFR[1] = 0xCCCCCCCC; - /* Configure PFx pins in Alternate function mode */ - GPIOF->MODER = 0xAA800AAA; - /* Configure PFx pins speed to 50 MHz */ - GPIOF->OSPEEDR = 0xAA800AAA; - /* Configure PFx pins Output type to push-pull */ - GPIOF->OTYPER = 0x00000000; - /* No pull-up, pull-down for PFx pins */ - GPIOF->PUPDR = 0x00000000; - - /* Connect PGx pins to FMC Alternate function */ - GPIOG->AFR[0] = 0xCCCCCCCC; - GPIOG->AFR[1] = 0xCCCCCCCC; - /* Configure PGx pins in Alternate function mode */ - GPIOG->MODER = 0xAAAAAAAA; - /* Configure PGx pins speed to 50 MHz */ - GPIOG->OSPEEDR = 0xAAAAAAAA; - /* Configure PGx pins Output type to push-pull */ - GPIOG->OTYPER = 0x00000000; - /* No pull-up, pull-down for PGx pins */ - GPIOG->PUPDR = 0x00000000; - - /* Connect PHx pins to FMC Alternate function */ - GPIOH->AFR[0] = 0x00C0CC00; - GPIOH->AFR[1] = 0xCCCCCCCC; - /* Configure PHx pins in Alternate function mode */ - GPIOH->MODER = 0xAAAA08A0; - /* Configure PHx pins speed to 50 MHz */ - GPIOH->OSPEEDR = 0xAAAA08A0; - /* Configure PHx pins Output type to push-pull */ - GPIOH->OTYPER = 0x00000000; - /* No pull-up, pull-down for PHx pins */ - GPIOH->PUPDR = 0x00000000; - - /* Connect PIx pins to FMC Alternate function */ - GPIOI->AFR[0] = 0xCCCCCCCC; - GPIOI->AFR[1] = 0x00000CC0; - /* Configure PIx pins in Alternate function mode */ - GPIOI->MODER = 0x0028AAAA; - /* Configure PIx pins speed to 50 MHz */ - GPIOI->OSPEEDR = 0x0028AAAA; - /* Configure PIx pins Output type to push-pull */ - GPIOI->OTYPER = 0x00000000; - /* No pull-up, pull-down for PIx pins */ - GPIOI->PUPDR = 0x00000000; - -/*-- FMC Configuration ------------------------------------------------------*/ - /* Enable the FMC interface clock */ - RCC->AHB3ENR |= 0x00000001; - - /* Configure and enable SDRAM bank1 */ - FMC_Bank5_6->SDCR[0] = 0x000019E0; - FMC_Bank5_6->SDTR[0] = 0x01115351; - - /* SDRAM initialization sequence */ - /* Clock enable command */ - FMC_Bank5_6->SDCMR = 0x00000011; - tmpreg = FMC_Bank5_6->SDSR & 0x00000020; - while((tmpreg != 0) && (timeout-- > 0)) - { - tmpreg = FMC_Bank5_6->SDSR & 0x00000020; - } - - /* Delay */ - for (index = 0; index<1000; index++); - - /* PALL command */ - FMC_Bank5_6->SDCMR = 0x00000012; - timeout = 0xFFFF; - while((tmpreg != 0) && (timeout-- > 0)) - { - tmpreg = FMC_Bank5_6->SDSR & 0x00000020; - } - - /* Auto refresh command */ - FMC_Bank5_6->SDCMR = 0x00000073; - timeout = 0xFFFF; - while((tmpreg != 0) && (timeout-- > 0)) - { - tmpreg = FMC_Bank5_6->SDSR & 0x00000020; - } - - /* MRD register program */ - FMC_Bank5_6->SDCMR = 0x00046014; - timeout = 0xFFFF; - while((tmpreg != 0) && (timeout-- > 0)) - { - tmpreg = FMC_Bank5_6->SDSR & 0x00000020; - } - - /* Set refresh count */ - tmpreg = FMC_Bank5_6->SDRTR; - FMC_Bank5_6->SDRTR = (tmpreg | (0x0000027C<<1)); - - /* Disable write protection */ - tmpreg = FMC_Bank5_6->SDCR[0]; - FMC_Bank5_6->SDCR[0] = (tmpreg & 0xFFFFFDFF); -#endif /* DATA_IN_ExtSDRAM */ -#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */ - -#if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx) || defined(STM32F417xx) || defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) -#if defined(DATA_IN_ExtSRAM) -/*-- GPIOs Configuration -----------------------------------------------------*/ - /* Enable GPIOD, GPIOE, GPIOF and GPIOG interface clock */ - RCC->AHB1ENR |= 0x00000078; - - /* Connect PDx pins to FMC Alternate function */ - GPIOD->AFR[0] = 0x00CCC0CC; - GPIOD->AFR[1] = 0xCCCCCCCC; - /* Configure PDx pins in Alternate function mode */ - GPIOD->MODER = 0xAAAA0A8A; - /* Configure PDx pins speed to 100 MHz */ - GPIOD->OSPEEDR = 0xFFFF0FCF; - /* Configure PDx pins Output type to push-pull */ - GPIOD->OTYPER = 0x00000000; - /* No pull-up, pull-down for PDx pins */ - GPIOD->PUPDR = 0x00000000; - - /* Connect PEx pins to FMC Alternate function */ - GPIOE->AFR[0] = 0xC00CC0CC; - GPIOE->AFR[1] = 0xCCCCCCCC; - /* Configure PEx pins in Alternate function mode */ - GPIOE->MODER = 0xAAAA828A; - /* Configure PEx pins speed to 100 MHz */ - GPIOE->OSPEEDR = 0xFFFFC3CF; - /* Configure PEx pins Output type to push-pull */ - GPIOE->OTYPER = 0x00000000; - /* No pull-up, pull-down for PEx pins */ - GPIOE->PUPDR = 0x00000000; - - /* Connect PFx pins to FMC Alternate function */ - GPIOF->AFR[0] = 0x00CCCCCC; - GPIOF->AFR[1] = 0xCCCC0000; - /* Configure PFx pins in Alternate function mode */ - GPIOF->MODER = 0xAA000AAA; - /* Configure PFx pins speed to 100 MHz */ - GPIOF->OSPEEDR = 0xFF000FFF; - /* Configure PFx pins Output type to push-pull */ - GPIOF->OTYPER = 0x00000000; - /* No pull-up, pull-down for PFx pins */ - GPIOF->PUPDR = 0x00000000; - - /* Connect PGx pins to FMC Alternate function */ - GPIOG->AFR[0] = 0x00CCCCCC; - GPIOG->AFR[1] = 0x000000C0; - /* Configure PGx pins in Alternate function mode */ - GPIOG->MODER = 0x00085AAA; - /* Configure PGx pins speed to 100 MHz */ - GPIOG->OSPEEDR = 0x000CAFFF; - /* Configure PGx pins Output type to push-pull */ - GPIOG->OTYPER = 0x00000000; - /* No pull-up, pull-down for PGx pins */ - GPIOG->PUPDR = 0x00000000; - -/*-- FMC/FSMC Configuration --------------------------------------------------*/ - /* Enable the FMC/FSMC interface clock */ - RCC->AHB3ENR |= 0x00000001; - -#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx)|| defined(STM32F439xx) - /* Configure and enable Bank1_SRAM2 */ - FMC_Bank1->BTCR[2] = 0x00001011; - FMC_Bank1->BTCR[3] = 0x00000201; - FMC_Bank1E->BWTR[2] = 0x0fffffff; -#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */ - -#if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx)|| defined(STM32F417xx) - /* Configure and enable Bank1_SRAM2 */ - FSMC_Bank1->BTCR[2] = 0x00001011; - FSMC_Bank1->BTCR[3] = 0x00000201; - FSMC_Bank1E->BWTR[2] = 0x0FFFFFFF; -#endif /* STM32F405xx || STM32F415xx || STM32F407xx || STM32F417xx */ - -#endif /* DATA_IN_ExtSRAM */ -#endif /* STM32F405xx || STM32F415xx || STM32F407xx || STM32F417xx || STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */ -} -#endif /* DATA_IN_ExtSRAM || DATA_IN_ExtSDRAM */ - -/** - * @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 clock */ - if (SetSysClock_PLL_HSI() == 0) - { - while(1) - { - // [TODO] Put something here to tell the user that a problem occured... - } - } - } - } - - /* Output clock on MCO2 pin(PC9) for debugging purpose */ - //HAL_RCC_MCOConfig(RCC_MCO2, RCC_MCO2SOURCE_SYSCLK, RCC_MCODIV_4); // 100 MHz / 4 = 25 MHz -} - -#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; - RCC_OscInitTypeDef RCC_OscInitStruct; - - /* 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. */ - __PWR_CLK_ENABLE(); - __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2); - - /* Enable HSE oscillator and activate PLL with HSE as source */ - RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; - 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.PLL.PLLState = RCC_PLL_ON; - RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; - //RCC_OscInitStruct.PLL.PLLM = 8; // VCO input clock = 1 MHz (8 MHz / 8) - //RCC_OscInitStruct.PLL.PLLN = 400; // VCO output clock = 400 MHz (1 MHz * 400) - //RCC_OscInitStruct.PLL.PLLM = 4; // VCO input clock = 2 MHz (8 MHz / 4) - //RCC_OscInitStruct.PLL.PLLN = 200; // VCO output clock = 400 MHz (2 MHz * 200) - #define VCO_IN_FREQ 2000000 - RCC_OscInitStruct.PLL.PLLM = (HSE_VALUE / VCO_IN_FREQ); // VCO input clock = 2 MHz = (24 MHz / 12) - RCC_OscInitStruct.PLL.PLLN = (400000000 / VCO_IN_FREQ); // VCO output clock = 400 MHz = (2 MHz * 200) - RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4; // PLLCLK = 100 MHz (400 MHz / 4) - RCC_OscInitStruct.PLL.PLLQ = 9; // USB clock = 44.44 MHz (400 MHz / 9) --> Not good for USB - 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; // 100 MHz - RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 100 MHz - RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 50 MHz - RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 100 MHz - if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK) - { - return 0; // FAIL - } - - /* Output clock on MCO1 pin(PA8) for debugging purpose */ - - //if (bypass == 0) - // HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_2); // 4 MHz with xtal - //else - // HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_1); // 8 MHz with external clock - - return 1; // OK -} -#endif - -/******************************************************************************/ -/* PLL (clocked by HSI) used as System clock source */ -/******************************************************************************/ -uint8_t SetSysClock_PLL_HSI(void) -{ - RCC_ClkInitTypeDef RCC_ClkInitStruct; - RCC_OscInitTypeDef RCC_OscInitStruct; - - /* 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. */ - __PWR_CLK_ENABLE(); - __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2); - - /* Enable HSI oscillator and activate PLL with HSI as source */ - RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE; - RCC_OscInitStruct.HSIState = RCC_HSI_ON; - RCC_OscInitStruct.HSEState = RCC_HSE_OFF; - RCC_OscInitStruct.HSICalibrationValue = 16; - RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; - RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI; - //RCC_OscInitStruct.PLL.PLLM = 16; // VCO input clock = 1 MHz (16 MHz / 16) - //RCC_OscInitStruct.PLL.PLLN = 400; // VCO output clock = 400 MHz (1 MHz * 400) - RCC_OscInitStruct.PLL.PLLM = 8; // VCO input clock = 2 MHz (16 MHz / 8) - RCC_OscInitStruct.PLL.PLLN = 200; // VCO output clock = 400 MHz (2 MHz * 200) - RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4; // PLLCLK = 100 MHz (400 MHz / 4) - RCC_OscInitStruct.PLL.PLLQ = 9; // USB clock = 44.44 MHz (400 MHz / 9) --> Not good for USB - 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; // 100 MHz - RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 100 MHz - RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 50 MHz - RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 100 MHz - if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK) - { - return 0; // FAIL - } - - /* Output clock on MCO1 pin(PA8) for debugging purpose */ - //HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSI, RCC_MCODIV_1); // 16 MHz - - return 1; // OK -} - -/** - * @} - */ - -/** - * @} - */ - -/** - * @} - */ -/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ +/** + ****************************************************************************** + * @file system_stm32f4xx.c + * @author MCD Application Team + * @version V2.5.0 + * @date 22-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_stm32f4xx.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. + * + * 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 | + * | (external 8 MHz xtal) | + *----------------------------------------------------------------------------- + * SYSCLK(MHz) | 100 | 100 + *----------------------------------------------------------------------------- + * AHBCLK (MHz) | 100 | 100 + *----------------------------------------------------------------------------- + * APB1CLK (MHz) | 50 | 50 + *----------------------------------------------------------------------------- + * APB2CLK (MHz) | 100 | 100 + *----------------------------------------------------------------------------- + * USB capable (48 MHz precise clock) | NO | NO + *----------------------------------------------------------------------------- + ****************************************************************************** + * @attention + * + * <h2><center>© COPYRIGHT 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 stm32f4xx_system + * @{ + */ + +/** @addtogroup STM32F4xx_System_Private_Includes + * @{ + */ + + +#include "stm32f4xx.h" +#include "hal_tick.h" + +#if !defined (HSE_VALUE) + #define HSE_VALUE ((uint32_t)8000000) /*!< Default value of the External oscillator in Hz */ +#endif /* HSE_VALUE */ + +#if !defined (HSI_VALUE) + #define HSI_VALUE ((uint32_t)16000000) /*!< Value of the Internal oscillator in Hz*/ +#endif /* HSI_VALUE */ + +/** + * @} + */ + +/** @addtogroup STM32F4xx_System_Private_TypesDefinitions + * @{ + */ + +/** + * @} + */ + +/** @addtogroup STM32F4xx_System_Private_Defines + * @{ + */ + +/************************* Miscellaneous Configuration ************************/ +/*!< Uncomment the following line if you need to use external SRAM or SDRAM as data memory */ +#if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx) || defined(STM32F417xx)\ + || defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx)\ + || defined(STM32F469xx) || defined(STM32F479xx) || defined(STM32F412Zx) || defined(STM32F412Vx) +/* #define DATA_IN_ExtSRAM */ +#endif /* STM32F40xxx || STM32F41xxx || STM32F42xxx || STM32F43xxx || STM32F469xx || STM32F479xx ||\ + STM32F412Zx || STM32F412Vx */ + +#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx)\ + || defined(STM32F446xx) || defined(STM32F469xx) || defined(STM32F479xx) +/* #define DATA_IN_ExtSDRAM */ +#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx || STM32F446xx || STM32F469xx ||\ + STM32F479xx */ + +/*!< 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 STM32F4xx_System_Private_Macros + * @{ + */ + +/* Select the clock sources (other than HSI) to start with (0=OFF, 1=ON) */ +#define USE_PLL_HSE_EXTC (0) /* Use external clock */ +#define USE_PLL_HSE_XTAL (1) /* Use external xtal */ + +/** + * @} + */ + +/** @addtogroup STM32F4xx_System_Private_Variables + * @{ + */ + /* This 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 = 16000000; +const uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9}; + +/** + * @} + */ + +/** @addtogroup STM32F4xx_System_Private_FunctionPrototypes + * @{ + */ + +#if defined (DATA_IN_ExtSRAM) || defined (DATA_IN_ExtSDRAM) + static void SystemInit_ExtMemCtl(void); +#endif /* DATA_IN_ExtSRAM || DATA_IN_ExtSDRAM */ + +#if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0) +uint8_t SetSysClock_PLL_HSE(uint8_t bypass); +#endif + +uint8_t SetSysClock_PLL_HSI(void); + +/** + * @} + */ + +/** @addtogroup STM32F4xx_System_Private_Functions + * @{ + */ + +/** + * @brief Setup the microcontroller system + * Initialize the FPU setting, vector table location and External memory + * configuration. + * @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 HSION bit */ + RCC->CR |= (uint32_t)0x00000001; + + /* Reset CFGR register */ + RCC->CFGR = 0x00000000; + + /* Reset HSEON, CSSON and PLLON bits */ + RCC->CR &= (uint32_t)0xFEF6FFFF; + + /* Reset PLLCFGR register */ + RCC->PLLCFGR = 0x24003010; + + /* Reset HSEBYP bit */ + RCC->CR &= (uint32_t)0xFFFBFFFF; + + /* Disable all interrupts */ + RCC->CIR = 0x00000000; + +#if defined (DATA_IN_ExtSRAM) || defined (DATA_IN_ExtSDRAM) + SystemInit_ExtMemCtl(); +#endif /* DATA_IN_ExtSRAM || DATA_IN_ExtSDRAM */ + + /* 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 = 16000000; // At this stage the HSI 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 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(*) multiplied/divided by the PLL factors. + * + * (*) HSI_VALUE is a constant defined in stm32f4xx_hal_conf.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 stm32f4xx_hal_conf.h file (its value + * depends on the application requirements), 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, pllvco = 0, pllp = 2, pllsource = 0, pllm = 2; + + /* Get SYSCLK source -------------------------------------------------------*/ + tmp = RCC->CFGR & RCC_CFGR_SWS; + + switch (tmp) + { + case 0x00: /* HSI used as system clock source */ + SystemCoreClock = HSI_VALUE; + break; + case 0x04: /* HSE used as system clock source */ + SystemCoreClock = HSE_VALUE; + break; + case 0x08: /* PLL used as system clock source */ + + /* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLL_M) * PLL_N + SYSCLK = PLL_VCO / PLL_P + */ + pllsource = (RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC) >> 22; + pllm = RCC->PLLCFGR & RCC_PLLCFGR_PLLM; + + if (pllsource != 0) + { + /* HSE used as PLL clock source */ + pllvco = (HSE_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 6); + } + else + { + /* HSI used as PLL clock source */ + pllvco = (HSI_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 6); + } + + pllp = (((RCC->PLLCFGR & RCC_PLLCFGR_PLLP) >>16) + 1 ) *2; + SystemCoreClock = pllvco/pllp; + break; + default: + SystemCoreClock = HSI_VALUE; + break; + } + /* Compute HCLK frequency --------------------------------------------------*/ + /* Get HCLK prescaler */ + tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)]; + /* HCLK frequency */ + SystemCoreClock >>= tmp; +} + +#if defined (DATA_IN_ExtSRAM) && defined (DATA_IN_ExtSDRAM) +#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) ||\ + defined(STM32F469xx) || defined(STM32F479xx) +/** + * @brief Setup the external memory controller. + * Called in startup_stm32f4xx.s before jump to main. + * This function configures the external memories (SRAM/SDRAM) + * This SRAM/SDRAM will be used as program data memory (including heap and stack). + * @param None + * @retval None + */ +void SystemInit_ExtMemCtl(void) +{ + __IO uint32_t tmp = 0x00; + + register uint32_t tmpreg = 0, timeout = 0xFFFF; + register __IO uint32_t index; + + /* Enable GPIOC, GPIOD, GPIOE, GPIOF, GPIOG, GPIOH and GPIOI interface clock */ + RCC->AHB1ENR |= 0x000001F8; + + /* Delay after an RCC peripheral clock enabling */ + tmp = READ_BIT(RCC->AHB1ENR, RCC_AHB1ENR_GPIOCEN); + + /* Connect PDx pins to FMC Alternate function */ + GPIOD->AFR[0] = 0x00CCC0CC; + GPIOD->AFR[1] = 0xCCCCCCCC; + /* Configure PDx pins in Alternate function mode */ + GPIOD->MODER = 0xAAAA0A8A; + /* Configure PDx pins speed to 100 MHz */ + GPIOD->OSPEEDR = 0xFFFF0FCF; + /* Configure PDx pins Output type to push-pull */ + GPIOD->OTYPER = 0x00000000; + /* No pull-up, pull-down for PDx pins */ + GPIOD->PUPDR = 0x00000000; + + /* Connect PEx pins to FMC Alternate function */ + GPIOE->AFR[0] = 0xC00CC0CC; + GPIOE->AFR[1] = 0xCCCCCCCC; + /* Configure PEx pins in Alternate function mode */ + GPIOE->MODER = 0xAAAA828A; + /* Configure PEx pins speed to 100 MHz */ + GPIOE->OSPEEDR = 0xFFFFC3CF; + /* Configure PEx pins Output type to push-pull */ + GPIOE->OTYPER = 0x00000000; + /* No pull-up, pull-down for PEx pins */ + GPIOE->PUPDR = 0x00000000; + + /* Connect PFx pins to FMC Alternate function */ + GPIOF->AFR[0] = 0xCCCCCCCC; + GPIOF->AFR[1] = 0xCCCCCCCC; + /* Configure PFx pins in Alternate function mode */ + GPIOF->MODER = 0xAA800AAA; + /* Configure PFx pins speed to 50 MHz */ + GPIOF->OSPEEDR = 0xAA800AAA; + /* Configure PFx pins Output type to push-pull */ + GPIOF->OTYPER = 0x00000000; + /* No pull-up, pull-down for PFx pins */ + GPIOF->PUPDR = 0x00000000; + + /* Connect PGx pins to FMC Alternate function */ + GPIOG->AFR[0] = 0xCCCCCCCC; + GPIOG->AFR[1] = 0xCCCCCCCC; + /* Configure PGx pins in Alternate function mode */ + GPIOG->MODER = 0xAAAAAAAA; + /* Configure PGx pins speed to 50 MHz */ + GPIOG->OSPEEDR = 0xAAAAAAAA; + /* Configure PGx pins Output type to push-pull */ + GPIOG->OTYPER = 0x00000000; + /* No pull-up, pull-down for PGx pins */ + GPIOG->PUPDR = 0x00000000; + + /* Connect PHx pins to FMC Alternate function */ + GPIOH->AFR[0] = 0x00C0CC00; + GPIOH->AFR[1] = 0xCCCCCCCC; + /* Configure PHx pins in Alternate function mode */ + GPIOH->MODER = 0xAAAA08A0; + /* Configure PHx pins speed to 50 MHz */ + GPIOH->OSPEEDR = 0xAAAA08A0; + /* Configure PHx pins Output type to push-pull */ + GPIOH->OTYPER = 0x00000000; + /* No pull-up, pull-down for PHx pins */ + GPIOH->PUPDR = 0x00000000; + + /* Connect PIx pins to FMC Alternate function */ + GPIOI->AFR[0] = 0xCCCCCCCC; + GPIOI->AFR[1] = 0x00000CC0; + /* Configure PIx pins in Alternate function mode */ + GPIOI->MODER = 0x0028AAAA; + /* Configure PIx pins speed to 50 MHz */ + GPIOI->OSPEEDR = 0x0028AAAA; + /* Configure PIx pins Output type to push-pull */ + GPIOI->OTYPER = 0x00000000; + /* No pull-up, pull-down for PIx pins */ + GPIOI->PUPDR = 0x00000000; + +/*-- FMC Configuration -------------------------------------------------------*/ + /* Enable the FMC interface clock */ + RCC->AHB3ENR |= 0x00000001; + /* Delay after an RCC peripheral clock enabling */ + tmp = READ_BIT(RCC->AHB3ENR, RCC_AHB3ENR_FMCEN); + + FMC_Bank5_6->SDCR[0] = 0x000019E4; + FMC_Bank5_6->SDTR[0] = 0x01115351; + + /* SDRAM initialization sequence */ + /* Clock enable command */ + FMC_Bank5_6->SDCMR = 0x00000011; + tmpreg = FMC_Bank5_6->SDSR & 0x00000020; + while((tmpreg != 0) && (timeout-- > 0)) + { + tmpreg = FMC_Bank5_6->SDSR & 0x00000020; + } + + /* Delay */ + for (index = 0; index<1000; index++); + + /* PALL command */ + FMC_Bank5_6->SDCMR = 0x00000012; + timeout = 0xFFFF; + while((tmpreg != 0) && (timeout-- > 0)) + { + tmpreg = FMC_Bank5_6->SDSR & 0x00000020; + } + + /* Auto refresh command */ + FMC_Bank5_6->SDCMR = 0x00000073; + timeout = 0xFFFF; + while((tmpreg != 0) && (timeout-- > 0)) + { + tmpreg = FMC_Bank5_6->SDSR & 0x00000020; + } + + /* MRD register program */ + FMC_Bank5_6->SDCMR = 0x00046014; + timeout = 0xFFFF; + while((tmpreg != 0) && (timeout-- > 0)) + { + tmpreg = FMC_Bank5_6->SDSR & 0x00000020; + } + + /* Set refresh count */ + tmpreg = FMC_Bank5_6->SDRTR; + FMC_Bank5_6->SDRTR = (tmpreg | (0x0000027C<<1)); + + /* Disable write protection */ + tmpreg = FMC_Bank5_6->SDCR[0]; + FMC_Bank5_6->SDCR[0] = (tmpreg & 0xFFFFFDFF); + +#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) + /* Configure and enable Bank1_SRAM2 */ + FMC_Bank1->BTCR[2] = 0x00001011; + FMC_Bank1->BTCR[3] = 0x00000201; + FMC_Bank1E->BWTR[2] = 0x0fffffff; +#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */ +#if defined(STM32F469xx) || defined(STM32F479xx) + /* Configure and enable Bank1_SRAM2 */ + FMC_Bank1->BTCR[2] = 0x00001091; + FMC_Bank1->BTCR[3] = 0x00110212; + FMC_Bank1E->BWTR[2] = 0x0fffffff; +#endif /* STM32F469xx || STM32F479xx */ + + (void)(tmp); +} +#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx || STM32F469xx || STM32F479xx */ +#elif defined (DATA_IN_ExtSRAM) || defined (DATA_IN_ExtSDRAM) +/** + * @brief Setup the external memory controller. + * Called in startup_stm32f4xx.s before jump to main. + * This function configures the external memories (SRAM/SDRAM) + * This SRAM/SDRAM will be used as program data memory (including heap and stack). + * @param None + * @retval None + */ +void SystemInit_ExtMemCtl(void) +{ + __IO uint32_t tmp = 0x00; +#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx)\ + || defined(STM32F446xx) || defined(STM32F469xx) || defined(STM32F479xx) +#if defined (DATA_IN_ExtSDRAM) + register uint32_t tmpreg = 0, timeout = 0xFFFF; + register __IO uint32_t index; + +#if defined(STM32F446xx) + /* Enable GPIOA, GPIOC, GPIOD, GPIOE, GPIOF, GPIOG interface + clock */ + RCC->AHB1ENR |= 0x0000007D; +#else + /* Enable GPIOC, GPIOD, GPIOE, GPIOF, GPIOG, GPIOH and GPIOI interface + clock */ + RCC->AHB1ENR |= 0x000001F8; +#endif /* STM32F446xx */ + /* Delay after an RCC peripheral clock enabling */ + tmp = READ_BIT(RCC->AHB1ENR, RCC_AHB1ENR_GPIOCEN); + +#if defined(STM32F446xx) + /* Connect PAx pins to FMC Alternate function */ + GPIOA->AFR[0] |= 0xC0000000; + GPIOA->AFR[1] |= 0x00000000; + /* Configure PDx pins in Alternate function mode */ + GPIOA->MODER |= 0x00008000; + /* Configure PDx pins speed to 50 MHz */ + GPIOA->OSPEEDR |= 0x00008000; + /* Configure PDx pins Output type to push-pull */ + GPIOA->OTYPER |= 0x00000000; + /* No pull-up, pull-down for PDx pins */ + GPIOA->PUPDR |= 0x00000000; + + /* Connect PCx pins to FMC Alternate function */ + GPIOC->AFR[0] |= 0x00CC0000; + GPIOC->AFR[1] |= 0x00000000; + /* Configure PDx pins in Alternate function mode */ + GPIOC->MODER |= 0x00000A00; + /* Configure PDx pins speed to 50 MHz */ + GPIOC->OSPEEDR |= 0x00000A00; + /* Configure PDx pins Output type to push-pull */ + GPIOC->OTYPER |= 0x00000000; + /* No pull-up, pull-down for PDx pins */ + GPIOC->PUPDR |= 0x00000000; +#endif /* STM32F446xx */ + + /* Connect PDx pins to FMC Alternate function */ + GPIOD->AFR[0] = 0x000000CC; + GPIOD->AFR[1] = 0xCC000CCC; + /* Configure PDx pins in Alternate function mode */ + GPIOD->MODER = 0xA02A000A; + /* Configure PDx pins speed to 50 MHz */ + GPIOD->OSPEEDR = 0xA02A000A; + /* Configure PDx pins Output type to push-pull */ + GPIOD->OTYPER = 0x00000000; + /* No pull-up, pull-down for PDx pins */ + GPIOD->PUPDR = 0x00000000; + + /* Connect PEx pins to FMC Alternate function */ + GPIOE->AFR[0] = 0xC00000CC; + GPIOE->AFR[1] = 0xCCCCCCCC; + /* Configure PEx pins in Alternate function mode */ + GPIOE->MODER = 0xAAAA800A; + /* Configure PEx pins speed to 50 MHz */ + GPIOE->OSPEEDR = 0xAAAA800A; + /* Configure PEx pins Output type to push-pull */ + GPIOE->OTYPER = 0x00000000; + /* No pull-up, pull-down for PEx pins */ + GPIOE->PUPDR = 0x00000000; + + /* Connect PFx pins to FMC Alternate function */ + GPIOF->AFR[0] = 0xCCCCCCCC; + GPIOF->AFR[1] = 0xCCCCCCCC; + /* Configure PFx pins in Alternate function mode */ + GPIOF->MODER = 0xAA800AAA; + /* Configure PFx pins speed to 50 MHz */ + GPIOF->OSPEEDR = 0xAA800AAA; + /* Configure PFx pins Output type to push-pull */ + GPIOF->OTYPER = 0x00000000; + /* No pull-up, pull-down for PFx pins */ + GPIOF->PUPDR = 0x00000000; + + /* Connect PGx pins to FMC Alternate function */ + GPIOG->AFR[0] = 0xCCCCCCCC; + GPIOG->AFR[1] = 0xCCCCCCCC; + /* Configure PGx pins in Alternate function mode */ + GPIOG->MODER = 0xAAAAAAAA; + /* Configure PGx pins speed to 50 MHz */ + GPIOG->OSPEEDR = 0xAAAAAAAA; + /* Configure PGx pins Output type to push-pull */ + GPIOG->OTYPER = 0x00000000; + /* No pull-up, pull-down for PGx pins */ + GPIOG->PUPDR = 0x00000000; + +#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx)\ + || defined(STM32F469xx) || defined(STM32F479xx) + /* Connect PHx pins to FMC Alternate function */ + GPIOH->AFR[0] = 0x00C0CC00; + GPIOH->AFR[1] = 0xCCCCCCCC; + /* Configure PHx pins in Alternate function mode */ + GPIOH->MODER = 0xAAAA08A0; + /* Configure PHx pins speed to 50 MHz */ + GPIOH->OSPEEDR = 0xAAAA08A0; + /* Configure PHx pins Output type to push-pull */ + GPIOH->OTYPER = 0x00000000; + /* No pull-up, pull-down for PHx pins */ + GPIOH->PUPDR = 0x00000000; + + /* Connect PIx pins to FMC Alternate function */ + GPIOI->AFR[0] = 0xCCCCCCCC; + GPIOI->AFR[1] = 0x00000CC0; + /* Configure PIx pins in Alternate function mode */ + GPIOI->MODER = 0x0028AAAA; + /* Configure PIx pins speed to 50 MHz */ + GPIOI->OSPEEDR = 0x0028AAAA; + /* Configure PIx pins Output type to push-pull */ + GPIOI->OTYPER = 0x00000000; + /* No pull-up, pull-down for PIx pins */ + GPIOI->PUPDR = 0x00000000; +#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx || STM32F469xx || STM32F479xx */ + +/*-- FMC Configuration -------------------------------------------------------*/ + /* Enable the FMC interface clock */ + RCC->AHB3ENR |= 0x00000001; + /* Delay after an RCC peripheral clock enabling */ + tmp = READ_BIT(RCC->AHB3ENR, RCC_AHB3ENR_FMCEN); + + /* Configure and enable SDRAM bank1 */ +#if defined(STM32F446xx) + FMC_Bank5_6->SDCR[0] = 0x00001954; +#else + FMC_Bank5_6->SDCR[0] = 0x000019E4; +#endif /* STM32F446xx */ + FMC_Bank5_6->SDTR[0] = 0x01115351; + + /* SDRAM initialization sequence */ + /* Clock enable command */ + FMC_Bank5_6->SDCMR = 0x00000011; + tmpreg = FMC_Bank5_6->SDSR & 0x00000020; + while((tmpreg != 0) && (timeout-- > 0)) + { + tmpreg = FMC_Bank5_6->SDSR & 0x00000020; + } + + /* Delay */ + for (index = 0; index<1000; index++); + + /* PALL command */ + FMC_Bank5_6->SDCMR = 0x00000012; + timeout = 0xFFFF; + while((tmpreg != 0) && (timeout-- > 0)) + { + tmpreg = FMC_Bank5_6->SDSR & 0x00000020; + } + + /* Auto refresh command */ +#if defined(STM32F446xx) + FMC_Bank5_6->SDCMR = 0x000000F3; +#else + FMC_Bank5_6->SDCMR = 0x00000073; +#endif /* STM32F446xx */ + timeout = 0xFFFF; + while((tmpreg != 0) && (timeout-- > 0)) + { + tmpreg = FMC_Bank5_6->SDSR & 0x00000020; + } + + /* MRD register program */ +#if defined(STM32F446xx) + FMC_Bank5_6->SDCMR = 0x00044014; +#else + FMC_Bank5_6->SDCMR = 0x00046014; +#endif /* STM32F446xx */ + timeout = 0xFFFF; + while((tmpreg != 0) && (timeout-- > 0)) + { + tmpreg = FMC_Bank5_6->SDSR & 0x00000020; + } + + /* Set refresh count */ + tmpreg = FMC_Bank5_6->SDRTR; +#if defined(STM32F446xx) + FMC_Bank5_6->SDRTR = (tmpreg | (0x0000050C<<1)); +#else + FMC_Bank5_6->SDRTR = (tmpreg | (0x0000027C<<1)); +#endif /* STM32F446xx */ + + /* Disable write protection */ + tmpreg = FMC_Bank5_6->SDCR[0]; + FMC_Bank5_6->SDCR[0] = (tmpreg & 0xFFFFFDFF); +#endif /* DATA_IN_ExtSDRAM */ +#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx || STM32F446xx || STM32F469xx || STM32F479xx */ + +#if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx) || defined(STM32F417xx)\ + || defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx)\ + || defined(STM32F469xx) || defined(STM32F479xx) || defined(STM32F412Zx) || defined(STM32F412Vx) + +#if defined(DATA_IN_ExtSRAM) +/*-- GPIOs Configuration -----------------------------------------------------*/ + /* Enable GPIOD, GPIOE, GPIOF and GPIOG interface clock */ + RCC->AHB1ENR |= 0x00000078; + /* Delay after an RCC peripheral clock enabling */ + tmp = READ_BIT(RCC->AHB1ENR, RCC_AHB1ENR_GPIODEN); + + /* Connect PDx pins to FMC Alternate function */ + GPIOD->AFR[0] = 0x00CCC0CC; + GPIOD->AFR[1] = 0xCCCCCCCC; + /* Configure PDx pins in Alternate function mode */ + GPIOD->MODER = 0xAAAA0A8A; + /* Configure PDx pins speed to 100 MHz */ + GPIOD->OSPEEDR = 0xFFFF0FCF; + /* Configure PDx pins Output type to push-pull */ + GPIOD->OTYPER = 0x00000000; + /* No pull-up, pull-down for PDx pins */ + GPIOD->PUPDR = 0x00000000; + + /* Connect PEx pins to FMC Alternate function */ + GPIOE->AFR[0] = 0xC00CC0CC; + GPIOE->AFR[1] = 0xCCCCCCCC; + /* Configure PEx pins in Alternate function mode */ + GPIOE->MODER = 0xAAAA828A; + /* Configure PEx pins speed to 100 MHz */ + GPIOE->OSPEEDR = 0xFFFFC3CF; + /* Configure PEx pins Output type to push-pull */ + GPIOE->OTYPER = 0x00000000; + /* No pull-up, pull-down for PEx pins */ + GPIOE->PUPDR = 0x00000000; + + /* Connect PFx pins to FMC Alternate function */ + GPIOF->AFR[0] = 0x00CCCCCC; + GPIOF->AFR[1] = 0xCCCC0000; + /* Configure PFx pins in Alternate function mode */ + GPIOF->MODER = 0xAA000AAA; + /* Configure PFx pins speed to 100 MHz */ + GPIOF->OSPEEDR = 0xFF000FFF; + /* Configure PFx pins Output type to push-pull */ + GPIOF->OTYPER = 0x00000000; + /* No pull-up, pull-down for PFx pins */ + GPIOF->PUPDR = 0x00000000; + + /* Connect PGx pins to FMC Alternate function */ + GPIOG->AFR[0] = 0x00CCCCCC; + GPIOG->AFR[1] = 0x000000C0; + /* Configure PGx pins in Alternate function mode */ + GPIOG->MODER = 0x00085AAA; + /* Configure PGx pins speed to 100 MHz */ + GPIOG->OSPEEDR = 0x000CAFFF; + /* Configure PGx pins Output type to push-pull */ + GPIOG->OTYPER = 0x00000000; + /* No pull-up, pull-down for PGx pins */ + GPIOG->PUPDR = 0x00000000; + +/*-- FMC/FSMC Configuration --------------------------------------------------*/ + /* Enable the FMC/FSMC interface clock */ + RCC->AHB3ENR |= 0x00000001; + +#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) + /* Delay after an RCC peripheral clock enabling */ + tmp = READ_BIT(RCC->AHB3ENR, RCC_AHB3ENR_FMCEN); + /* Configure and enable Bank1_SRAM2 */ + FMC_Bank1->BTCR[2] = 0x00001011; + FMC_Bank1->BTCR[3] = 0x00000201; + FMC_Bank1E->BWTR[2] = 0x0fffffff; +#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */ +#if defined(STM32F469xx) || defined(STM32F479xx) + /* Delay after an RCC peripheral clock enabling */ + tmp = READ_BIT(RCC->AHB3ENR, RCC_AHB3ENR_FMCEN); + /* Configure and enable Bank1_SRAM2 */ + FMC_Bank1->BTCR[2] = 0x00001091; + FMC_Bank1->BTCR[3] = 0x00110212; + FMC_Bank1E->BWTR[2] = 0x0fffffff; +#endif /* STM32F469xx || STM32F479xx */ +#if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx)|| defined(STM32F417xx)\ + || defined(STM32F412Zx) || defined(STM32F412Vx) + /* Delay after an RCC peripheral clock enabling */ + tmp = READ_BIT(RCC->AHB3ENR, RCC_AHB3ENR_FSMCEN); + /* Configure and enable Bank1_SRAM2 */ + FSMC_Bank1->BTCR[2] = 0x00001011; + FSMC_Bank1->BTCR[3] = 0x00000201; + FSMC_Bank1E->BWTR[2] = 0x0FFFFFFF; +#endif /* STM32F405xx || STM32F415xx || STM32F407xx || STM32F417xx || STM32F412Zx || STM32F412Vx */ + +#endif /* DATA_IN_ExtSRAM */ +#endif /* STM32F405xx || STM32F415xx || STM32F407xx || STM32F417xx || STM32F427xx || STM32F437xx ||\ + STM32F429xx || STM32F439xx || STM32F469xx || STM32F479xx || STM32F412Zx || STM32F412Vx */ + (void)(tmp); +} +#endif /* DATA_IN_ExtSRAM && DATA_IN_ExtSDRAM */ + +/** + * @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 clock */ + if (SetSysClock_PLL_HSI() == 0) + { + while(1) + { + // [TODO] Put something here to tell the user that a problem occured... + } + } + } + } + + /* Output clock on MCO2 pin(PC9) for debugging purpose */ + //HAL_RCC_MCOConfig(RCC_MCO2, RCC_MCO2SOURCE_SYSCLK, RCC_MCODIV_4); // 100 MHz / 4 = 25 MHz +} + +#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; + RCC_OscInitTypeDef RCC_OscInitStruct; + + /* 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. */ + __PWR_CLK_ENABLE(); + __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2); + + /* Enable HSE oscillator and activate PLL with HSE as source */ + RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; + 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.PLL.PLLState = RCC_PLL_ON; + RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; + //RCC_OscInitStruct.PLL.PLLM = 8; // VCO input clock = 1 MHz (8 MHz / 8) + //RCC_OscInitStruct.PLL.PLLN = 400; // VCO output clock = 400 MHz (1 MHz * 400) + //RCC_OscInitStruct.PLL.PLLM = 4; // VCO input clock = 2 MHz (8 MHz / 4) + //RCC_OscInitStruct.PLL.PLLN = 200; // VCO output clock = 400 MHz (2 MHz * 200) + #define VCO_IN_FREQ 2000000 + RCC_OscInitStruct.PLL.PLLM = (HSE_VALUE / VCO_IN_FREQ); // VCO input clock = 2 MHz = (24 MHz / 12) + RCC_OscInitStruct.PLL.PLLN = (400000000 / VCO_IN_FREQ); // VCO output clock = 400 MHz = (2 MHz * 200) + RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4; // PLLCLK = 100 MHz (400 MHz / 4) + RCC_OscInitStruct.PLL.PLLQ = 9; // USB clock = 44.44 MHz (400 MHz / 9) --> Not good for USB + 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; // 100 MHz + RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 100 MHz + RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 50 MHz + RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 100 MHz + if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK) + { + return 0; // FAIL + } + + /* Output clock on MCO1 pin(PA8) for debugging purpose */ + + //if (bypass == 0) + // HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_2); // 4 MHz with xtal + //else + // HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_1); // 8 MHz with external clock + + return 1; // OK +} +#endif + +/******************************************************************************/ +/* PLL (clocked by HSI) used as System clock source */ +/******************************************************************************/ +uint8_t SetSysClock_PLL_HSI(void) +{ + RCC_ClkInitTypeDef RCC_ClkInitStruct; + RCC_OscInitTypeDef RCC_OscInitStruct; + + /* 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. */ + __PWR_CLK_ENABLE(); + __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2); + + /* Enable HSI oscillator and activate PLL with HSI as source */ + RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE; + RCC_OscInitStruct.HSIState = RCC_HSI_ON; + RCC_OscInitStruct.HSEState = RCC_HSE_OFF; + RCC_OscInitStruct.HSICalibrationValue = 16; + RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; + RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI; + //RCC_OscInitStruct.PLL.PLLM = 16; // VCO input clock = 1 MHz (16 MHz / 16) + //RCC_OscInitStruct.PLL.PLLN = 400; // VCO output clock = 400 MHz (1 MHz * 400) + RCC_OscInitStruct.PLL.PLLM = 8; // VCO input clock = 2 MHz (16 MHz / 8) + RCC_OscInitStruct.PLL.PLLN = 200; // VCO output clock = 400 MHz (2 MHz * 200) + RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4; // PLLCLK = 100 MHz (400 MHz / 4) + RCC_OscInitStruct.PLL.PLLQ = 9; // USB clock = 44.44 MHz (400 MHz / 9) --> Not good for USB + 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; // 100 MHz + RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 100 MHz + RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 50 MHz + RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 100 MHz + if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK) + { + return 0; // FAIL + } + + /* Output clock on MCO1 pin(PA8) for debugging purpose */ + //HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSI, RCC_MCODIV_1); // 16 MHz + + return 1; // OK +} + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/