/** ****************************************************************************** * @file system_stm32h7xx.c * @author MCD Application Team * @brief CMSIS Cortex-Mx 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_stm32h7xx.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. * * ****************************************************************************** * @attention * *

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* * 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 stm32h7xx_system * @{ */ /** @addtogroup STM32H7xx_System_Private_Includes * @{ */ #include "stm32h7xx.h" #if !defined (HSE_VALUE) #define HSE_VALUE ((uint32_t)25000000) /*!< Value of the External oscillator in Hz */ #endif /* HSE_VALUE */ #if !defined (CSI_VALUE) #define CSI_VALUE ((uint32_t)4000000) /*!< Value of the Internal oscillator in Hz*/ #endif /* CSI_VALUE */ #if !defined (HSI_VALUE) #define HSI_VALUE ((uint32_t)64000000) /*!< Value of the Internal oscillator in Hz*/ #endif /* HSI_VALUE */ /** * @} */ /** @addtogroup STM32H7xx_System_Private_TypesDefinitions * @{ */ /** * @} */ /** @addtogroup STM32H7xx_System_Private_Defines * @{ */ /************************* Miscellaneous Configuration ************************/ /*!< Uncomment the following line if you need to use external SRAM or SDRAM mounted on EVAL board as data memory */ /*#define DATA_IN_ExtSRAM */ /*#define DATA_IN_ExtSDRAM*/ #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 STM32H7xx_System_Private_Macros * @{ */ /** * @} */ /** @addtogroup STM32H7xx_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 = 64000000; uint32_t SystemD2Clock = 64000000; const uint8_t D1CorePrescTable[16] = {0, 0, 0, 0, 1, 2, 3, 4, 1, 2, 3, 4, 6, 7, 8, 9}; /** * @} */ /** @addtogroup STM32H7xx_System_Private_FunctionPrototypes * @{ */ #if defined (DATA_IN_ExtSRAM) || defined (DATA_IN_ExtSDRAM) static void SystemInit_ExtMemCtl(void); #endif /* DATA_IN_ExtSRAM || DATA_IN_ExtSDRAM */ /** * @} */ /** @addtogroup STM32H7xx_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 |= RCC_CR_HSION; /* Reset CFGR register */ RCC->CFGR = 0x00000000; /* Reset HSEON, CSSON , CSION,RC48ON, CSIKERON PLL1ON, PLL2ON and PLL3ON bits */ RCC->CR &= (uint32_t)0xEAF6ED7F; /* Reset D1CFGR register */ RCC->D1CFGR = 0x00000000; /* Reset D2CFGR register */ RCC->D2CFGR = 0x00000000; /* Reset D3CFGR register */ RCC->D3CFGR = 0x00000000; /* Reset PLLCKSELR register */ RCC->PLLCKSELR = 0x00000000; /* Reset PLLCFGR register */ RCC->PLLCFGR = 0x00000000; /* Reset PLL1DIVR register */ RCC->PLL1DIVR = 0x00000000; /* Reset PLL1FRACR register */ RCC->PLL1FRACR = 0x00000000; /* Reset PLL2DIVR register */ RCC->PLL2DIVR = 0x00000000; /* Reset PLL2FRACR register */ RCC->PLL2FRACR = 0x00000000; /* Reset PLL3DIVR register */ RCC->PLL3DIVR = 0x00000000; /* Reset PLL3FRACR register */ RCC->PLL3FRACR = 0x00000000; /* Reset HSEBYP bit */ RCC->CR &= (uint32_t)0xFFFBFFFF; /* Disable all interrupts */ RCC->CIER = 0x00000000; /* Change the switch matrix read issuing capability to 1 for the AXI SRAM target (Target 7) */ *((__IO uint32_t*)0x51008108) = 0x00000001; #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 = D1_AXISRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal ITCMSRAM */ #else SCB->VTOR = FLASH_BANK1_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */ #endif } /** * @brief Update SystemCoreClock variable according to Clock Register Values. * The SystemCoreClock variable contains the core clock , it can * be used by the user application to setup the SysTick timer or configure * other parameters. * * @note Each time the core clock 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 CSI, SystemCoreClock will contain the CSI_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 CSI_VALUE(*), * HSI_VALUE(**) or HSE_VALUE(***) multiplied/divided by the PLL factors. * * (*) CSI_VALUE is a constant defined in stm32h7xx_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 stm32h7xx_hal.h file (default value * 64 MHz) but the real value may vary depending on the variations * in voltage and temperature. * * (***)HSE_VALUE is a constant defined in stm32h7xx_hal.h file (default value * 25 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 pllp = 2, pllsource = 0, pllm = 2 ,tmp, pllfracen =0 , hsivalue = 0; float fracn1, pllvco = 0 ; /* Get SYSCLK source -------------------------------------------------------*/ switch (RCC->CFGR & RCC_CFGR_SWS) { case 0x00: /* HSI used as system clock source */ SystemCoreClock = (uint32_t) (HSI_VALUE >> ((RCC->CR & RCC_CR_HSIDIV)>> 3)); break; case 0x08: /* CSI used as system clock source */ SystemCoreClock = CSI_VALUE; break; case 0x10: /* HSE used as system clock source */ SystemCoreClock = HSE_VALUE; break; case 0x18: /* PLL1 used as system clock source */ /* PLL_VCO = (HSE_VALUE or HSI_VALUE or CSI_VALUE/ PLLM) * PLLN SYSCLK = PLL_VCO / PLLR */ pllsource = (RCC->PLLCKSELR & RCC_PLLCKSELR_PLLSRC); pllm = ((RCC->PLLCKSELR & RCC_PLLCKSELR_DIVM1)>> 4) ; pllfracen = RCC->PLLCFGR & RCC_PLLCFGR_PLL1FRACEN; fracn1 = (pllfracen* ((RCC->PLL1FRACR & RCC_PLL1FRACR_FRACN1)>> 3)); switch (pllsource) { case 0x00: /* HSI used as PLL clock source */ hsivalue = (HSI_VALUE >> ((RCC->CR & RCC_CR_HSIDIV)>> 3)) ; pllvco = (hsivalue/ pllm) * ((RCC->PLL1DIVR & RCC_PLL1DIVR_N1) + (fracn1/0x2000) +1 ); break; case 0x01: /* CSI used as PLL clock source */ pllvco = (CSI_VALUE / pllm) * ((RCC->PLL1DIVR & RCC_PLL1DIVR_N1) + (fracn1/0x2000) +1 ); break; case 0x02: /* HSE used as PLL clock source */ pllvco = (HSE_VALUE / pllm) * ((RCC->PLL1DIVR & RCC_PLL1DIVR_N1) + (fracn1/0x2000) +1 ); break; default: pllvco = (CSI_VALUE / pllm) * ((RCC->PLL1DIVR & RCC_PLL1DIVR_N1) + (fracn1/0x2000) +1 ); break; } pllp = (((RCC->PLL1DIVR & RCC_PLL1DIVR_P1) >>9) + 1 ) ; SystemCoreClock = (uint32_t) (pllvco/pllp); break; default: SystemCoreClock = CSI_VALUE; break; } /* Compute HCLK frequency --------------------------------------------------*/ /* Get HCLK prescaler */ tmp = D1CorePrescTable[(RCC->D1CFGR & RCC_D1CFGR_D1CPRE)>> POSITION_VAL(RCC_D1CFGR_D1CPRE_0)]; /* HCLK frequency */ SystemCoreClock >>= tmp; } #if defined (DATA_IN_ExtSRAM) || defined (DATA_IN_ExtSDRAM) /** * @brief Setup the external memory controller. * Called in startup_stm32h7xx.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 (DATA_IN_ExtSDRAM) register uint32_t tmpreg = 0, timeout = 0xFFFF; register __IO uint32_t index; /* Enable GPIOD, GPIOE, GPIOF, GPIOG, GPIOH and GPIOI interface clock */ RCC->AHB4ENR |= 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 = 0xAFEAFFFA; /* 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 = 0x55555505; /* Connect PEx pins to FMC Alternate function */ GPIOE->AFR[0] = 0xC00000CC; GPIOE->AFR[1] = 0xCCCCCCCC; /* Configure PEx pins in Alternate function mode */ GPIOE->MODER = 0xAAAABFFA; /* 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 = 0x55554005; /* Connect PFx pins to FMC Alternate function */ GPIOF->AFR[0] = 0x00CCCCCC; GPIOF->AFR[1] = 0xCCCCC000; /* Configure PFx pins in Alternate function mode */ GPIOF->MODER = 0xAABFFAAA; /* 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 = 0x55400555; /* Connect PGx pins to FMC Alternate function */ GPIOG->AFR[0] = 0x00CCCCCC; GPIOG->AFR[1] = 0xC000000C; /* Configure PGx pins in Alternate function mode */ GPIOG->MODER = 0xBFFEFAAA; /* Configure PGx pins speed to 50 MHz */ GPIOG->OSPEEDR = 0x80020AAA; /* Configure PGx pins Output type to push-pull */ GPIOG->OTYPER = 0x00000000; /* No pull-up, pull-down for PGx pins */ GPIOG->PUPDR = 0x40010515; /* Connect PHx pins to FMC Alternate function */ GPIOH->AFR[0] = 0xCCC00000; GPIOH->AFR[1] = 0xCCCCCCCC; /* Configure PHx pins in Alternate function mode */ GPIOH->MODER = 0xAAAAABFF; /* Configure PHx pins speed to 50 MHz */ GPIOH->OSPEEDR = 0xAAAAA800; /* Configure PHx pins Output type to push-pull */ GPIOH->OTYPER = 0x00000000; /* No pull-up, pull-down for PHx pins */ GPIOH->PUPDR = 0x55555400; /* Connect PIx pins to FMC Alternate function */ GPIOI->AFR[0] = 0xCCCCCCCC; GPIOI->AFR[1] = 0x00000CC0; /* Configure PIx pins in Alternate function mode */ GPIOI->MODER = 0xFFEBAAAA; /* 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 = 0x00145555; /*-- FMC Configuration ------------------------------------------------------*/ /* Enable the FMC interface clock */ (RCC->AHB3ENR |= (RCC_AHB3ENR_FMCEN)); /*SDRAM Timing and access interface configuration*/ /*LoadToActiveDelay = 2 ExitSelfRefreshDelay = 6 SelfRefreshTime = 4 RowCycleDelay = 6 WriteRecoveryTime = 2 RPDelay = 2 RCDDelay = 2 SDBank = FMC_SDRAM_BANK2 ColumnBitsNumber = FMC_SDRAM_COLUMN_BITS_NUM_9 RowBitsNumber = FMC_SDRAM_ROW_BITS_NUM_12 MemoryDataWidth = FMC_SDRAM_MEM_BUS_WIDTH_32 InternalBankNumber = FMC_SDRAM_INTERN_BANKS_NUM_4 CASLatency = FMC_SDRAM_CAS_LATENCY_2 WriteProtection = FMC_SDRAM_WRITE_PROTECTION_DISABLE SDClockPeriod = FMC_SDRAM_CLOCK_PERIOD_2 ReadBurst = FMC_SDRAM_RBURST_ENABLE ReadPipeDelay = FMC_SDRAM_RPIPE_DELAY_0*/ FMC_Bank5_6->SDCR[0] = 0x00001800; FMC_Bank5_6->SDCR[1] = 0x00000165; FMC_Bank5_6->SDTR[0] = 0x00105000; FMC_Bank5_6->SDTR[1] = 0x01010351; /* SDRAM initialization sequence */ /* Clock enable command */ FMC_Bank5_6->SDCMR = 0x00000009; 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 = 0x0000000A; timeout = 0xFFFF; while((tmpreg != 0) && (timeout-- > 0)) { tmpreg = FMC_Bank5_6->SDSR & 0x00000020; } FMC_Bank5_6->SDCMR = 0x000000EB; timeout = 0xFFFF; while((tmpreg != 0) && (timeout-- > 0)) { tmpreg = FMC_Bank5_6->SDSR & 0x00000020; } FMC_Bank5_6->SDCMR = 0x0004400C; 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 | (0x00000603<<1)); /* Disable write protection */ tmpreg = FMC_Bank5_6->SDCR[1]; FMC_Bank5_6->SDCR[1] = (tmpreg & 0xFFFFFDFF); /*FMC controller Enable*/ FMC_Bank1->BTCR[0] |= 0x80000000; #endif /* DATA_IN_ExtSDRAM */ #if defined(DATA_IN_ExtSRAM) /*-- GPIOs Configuration -----------------------------------------------------*/ /* Enable GPIOD, GPIOE, GPIOF and GPIOG interface clock */ RCC->AHB4ENR |= 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 = 0x55550545; /* 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 = 0x55554145; /* 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 = 0x55000555; /* Connect PGx pins to FMC Alternate function */ GPIOG->AFR[0] = 0x00CCCCCC; GPIOG->AFR[1] = 0x000000C0; /* Configure PGx pins in Alternate function mode */ GPIOG->MODER = 0x00200AAA; /* Configure PGx pins speed to 100 MHz */ GPIOG->OSPEEDR = 0x00300FFF; /* Configure PGx pins Output type to push-pull */ GPIOG->OTYPER = 0x00000000; /* No pull-up, pull-down for PGx pins */ GPIOG->PUPDR = 0x00100555; /*-- FMC/FSMC Configuration --------------------------------------------------*/ /* Enable the FMC/FSMC interface clock */ (RCC->AHB3ENR |= (RCC_AHB3ENR_FMCEN)); /* Configure and enable Bank1_SRAM2 */ FMC_Bank1->BTCR[4] = 0x00001091; FMC_Bank1->BTCR[5] = 0x00110212; FMC_Bank1E->BWTR[4] = 0x0FFFFFFF; /*FMC controller Enable*/ FMC_Bank1->BTCR[0] |= 0x80000000; #endif /* DATA_IN_ExtSRAM */ } #endif /* DATA_IN_ExtSRAM || DATA_IN_ExtSDRAM */ /** * @} */ /** * @} */ /** * @} */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/