[PATCH 1/3] bsps/stm32h7: add board C files for nucleo-h7a3zi BSP
Karel Gardas
karel at functional.vision
Sun Jul 24 21:59:24 UTC 2022
Besides C files for the BSP variant the patch also provides license
clarification on system_stm32h7xx.c file which is provided
in boards/stm/nucleo-h7a3zi directory.
The files comes from STM32CubeH7 project and references "root directory"
in its license comment and it's not clear where this points out.
Let's add clarification comment about it and also based on it
and resulting license let's add SPDX license identifier.
---
.../stm/nucleo-h7a3zi/stm32h7-bspstarthooks.c | 77 ++++
.../stm/nucleo-h7a3zi/stm32h7-config-clk.c | 45 ++
.../stm/nucleo-h7a3zi/stm32h7-config-osc.c | 49 +++
.../stm/nucleo-h7a3zi/stm32h7-config-per.c | 49 +++
.../stm/nucleo-h7a3zi/system_stm32h7xx.c | 391 ++++++++++++++++++
5 files changed, 611 insertions(+)
create mode 100644 bsps/arm/stm32h7/boards/stm/nucleo-h7a3zi/stm32h7-bspstarthooks.c
create mode 100644 bsps/arm/stm32h7/boards/stm/nucleo-h7a3zi/stm32h7-config-clk.c
create mode 100644 bsps/arm/stm32h7/boards/stm/nucleo-h7a3zi/stm32h7-config-osc.c
create mode 100644 bsps/arm/stm32h7/boards/stm/nucleo-h7a3zi/stm32h7-config-per.c
create mode 100644 bsps/arm/stm32h7/boards/stm/nucleo-h7a3zi/system_stm32h7xx.c
diff --git a/bsps/arm/stm32h7/boards/stm/nucleo-h7a3zi/stm32h7-bspstarthooks.c b/bsps/arm/stm32h7/boards/stm/nucleo-h7a3zi/stm32h7-bspstarthooks.c
new file mode 100644
index 0000000000..eda503925f
--- /dev/null
+++ b/bsps/arm/stm32h7/boards/stm/nucleo-h7a3zi/stm32h7-bspstarthooks.c
@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/*
+ * Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
+ *
+ * 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.
+ *
+ * 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 OWNER 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.
+ */
+
+#include <bsp.h>
+#include <bsp/bootcard.h>
+#include <bsp/linker-symbols.h>
+#include <bsp/start.h>
+#include <stm32h7/hal.h>
+#include <stm32h7/memory.h>
+#include <stm32h7/mpu-config.h>
+#include <rtems/score/armv7m.h>
+
+#include <string.h>
+
+void bsp_start_hook_0(void)
+{
+ if ((RCC->AHB3ENR & RCC_AHB3ENR_FMCEN) == 0) {
+ /*
+ * Only perform the low-level initialization if necessary. An initialized
+ * FMC indicates that a boot loader already performed the low-level
+ * initialization.
+ */
+ SystemInit();
+ stm32h7_init_power();
+ stm32h7_init_oscillator();
+ stm32h7_init_clocks();
+ stm32h7_init_peripheral_clocks();
+ HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSI, RCC_MCODIV_1);
+ HAL_Init();
+ }
+
+#if __CORTEX_M == 0x07U
+ if ((SCB->CCR & SCB_CCR_IC_Msk) == 0) {
+ SCB_EnableICache();
+ }
+
+ if ((SCB->CCR & SCB_CCR_DC_Msk) == 0) {
+ SCB_EnableDCache();
+ }
+
+ _ARMV7M_MPU_Setup(stm32h7_config_mpu_region, stm32h7_config_mpu_region_count);
+#endif
+}
+
+void bsp_start_hook_1(void)
+{
+ bsp_start_copy_sections_compact();
+#if __CORTEX_M == 0x07U
+ SCB_CleanDCache();
+ SCB_InvalidateICache();
+#endif
+ bsp_start_clear_bss();
+}
diff --git a/bsps/arm/stm32h7/boards/stm/nucleo-h7a3zi/stm32h7-config-clk.c b/bsps/arm/stm32h7/boards/stm/nucleo-h7a3zi/stm32h7-config-clk.c
new file mode 100644
index 0000000000..c7e62179ce
--- /dev/null
+++ b/bsps/arm/stm32h7/boards/stm/nucleo-h7a3zi/stm32h7-config-clk.c
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/*
+ * Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
+ *
+ * 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.
+ *
+ * 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 OWNER 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stm32h7/hal.h>
+
+const RCC_ClkInitTypeDef stm32h7_config_clocks = {
+ .ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
+ | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2
+ | RCC_CLOCKTYPE_D3PCLK1 | RCC_CLOCKTYPE_D1PCLK1,
+ .SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK,
+ .SYSCLKDivider = RCC_SYSCLK_DIV1,
+ .AHBCLKDivider = RCC_HCLK_DIV1,
+ .APB3CLKDivider = RCC_APB3_DIV2,
+ .APB1CLKDivider = RCC_APB1_DIV2,
+ .APB2CLKDivider = RCC_APB2_DIV2,
+ .APB4CLKDivider = RCC_APB4_DIV2
+};
diff --git a/bsps/arm/stm32h7/boards/stm/nucleo-h7a3zi/stm32h7-config-osc.c b/bsps/arm/stm32h7/boards/stm/nucleo-h7a3zi/stm32h7-config-osc.c
new file mode 100644
index 0000000000..c09ae4c738
--- /dev/null
+++ b/bsps/arm/stm32h7/boards/stm/nucleo-h7a3zi/stm32h7-config-osc.c
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/*
+ * Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
+ *
+ * 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.
+ *
+ * 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 OWNER 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stm32h7/hal.h>
+
+const RCC_OscInitTypeDef stm32h7_config_oscillator = {
+ .OscillatorType = RCC_OSCILLATORTYPE_HSE,
+ .HSEState = RCC_HSE_ON,
+ .HSIState = RCC_HSI_OFF,
+ .CSIState = RCC_CSI_OFF,
+ .PLL.PLLState = RCC_PLL_ON,
+ .PLL.PLLSource = RCC_PLLSOURCE_HSE,
+ .PLL.PLLM = 12,
+ .PLL.PLLN = 280,
+ .PLL.PLLFRACN = 0,
+ .PLL.PLLP = 2,
+ .PLL.PLLR = 2,
+ .PLL.PLLQ = 2,
+ .PLL.PLLVCOSEL = RCC_PLL1VCOWIDE,
+ .PLL.PLLRGE = RCC_PLL1VCIRANGE_1,
+};
diff --git a/bsps/arm/stm32h7/boards/stm/nucleo-h7a3zi/stm32h7-config-per.c b/bsps/arm/stm32h7/boards/stm/nucleo-h7a3zi/stm32h7-config-per.c
new file mode 100644
index 0000000000..5b34d72624
--- /dev/null
+++ b/bsps/arm/stm32h7/boards/stm/nucleo-h7a3zi/stm32h7-config-per.c
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/*
+ * Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
+ *
+ * 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.
+ *
+ * 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 OWNER 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stm32h7/hal.h>
+
+const RCC_PeriphCLKInitTypeDef stm32h7_config_peripheral_clocks = {
+ /* for stm32h7b3i-dk BSP we provide only minimalistic peripheral
+ configuration just to make available U(S)ARTs working */
+ .PeriphClockSelection = RCC_PERIPHCLK_USART3
+ | RCC_PERIPHCLK_USART1,
+ .PLL2.PLL2M = 24,
+ .PLL2.PLL2N = 200,
+ .PLL2.PLL2P = 0,
+ .PLL2.PLL2Q = 2,
+ .PLL2.PLL2R = 0,
+ .PLL2.PLL2RGE = RCC_PLL2VCIRANGE_2,
+ .PLL2.PLL2VCOSEL = RCC_PLL2VCOMEDIUM,
+ .PLL2.PLL2FRACN = 0,
+ .Usart234578ClockSelection = RCC_USART234578CLKSOURCE_D2PCLK1,
+ .Usart16ClockSelection = RCC_USART16CLKSOURCE_D2PCLK2,
+};
diff --git a/bsps/arm/stm32h7/boards/stm/nucleo-h7a3zi/system_stm32h7xx.c b/bsps/arm/stm32h7/boards/stm/nucleo-h7a3zi/system_stm32h7xx.c
new file mode 100644
index 0000000000..39ea181019
--- /dev/null
+++ b/bsps/arm/stm32h7/boards/stm/nucleo-h7a3zi/system_stm32h7xx.c
@@ -0,0 +1,391 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+/**
+ ******************************************************************************
+ * @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
+ *
+ * Copyright (c) 2017 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software is licensed under terms that can be found in the LICENSE file
+ * in the root directory of this software component.
+ * If no LICENSE file comes with this software, it is provided AS-IS.
+ *
+ ******************************************************************************
+ */
+/*
+ * RTEMS committer clarification comment on license above:
+ *
+ * This file comes from STM32CubeH7 project from its Projects
+ * subdirectory. There is Templates subdirectory per every supported
+ * BSP there. The Templates contains the file. In our case the file is
+ * here:
+ * https://github.com/STMicroelectronics/STM32CubeH7/blob/master/Projects/NUCLEO-H7A3ZI-Q/Templates/Src/system_stm32h7xx.c
+ *
+ * When we go up in the directory tree starting from the file, we find
+ * out that the "root directory" in the sense of license claim above is Templates
+ * directory here:
+ * https://github.com/STMicroelectronics/STM32CubeH7/tree/master/Projects/NUCLEO-H7A3ZI-Q/Templates
+ *
+ * This directory contains LICENSE.md file with a following license text:
+ *
+ * Copyright 2019 STMicroelectronics.
+ * All rights reserved.
+ *
+ * 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 the copyright holder 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"
+#include <math.h>
+#if !defined (HSE_VALUE)
+#define HSE_VALUE ((uint32_t)8000000) /*!< 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 initialized data in CD domain AHB SRAM */
+/* #define DATA_IN_CD_AHB_SRAM */
+
+/*!< Uncomment the following line if you need to relocate your vector Table in
+ Internal SRAM. */
+/* #define VECT_TAB_SRAM */
+#define VECT_TAB_OFFSET 0x00000000UL /*!< 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; /* AXI and AHBs Clock frequency */
+ const uint8_t D1CorePrescTable[16] = {0, 0, 0, 0, 1, 2, 3, 4, 1, 2, 3, 4, 6, 7, 8, 9}; /* CPU Domain Core Prescaler Table */
+
+/**
+ * @}
+ */
+
+/** @addtogroup STM32H7xx_System_Private_FunctionPrototypes
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+/** @addtogroup STM32H7xx_System_Private_Functions
+ * @{
+ */
+
+/**
+ * @brief Setup the microcontroller system
+ * Initialize the FPU setting and vector table location
+ * configuration.
+ * @param None
+ * @retval None
+ */
+void SystemInit (void)
+{
+#ifdef DATA_IN_CD_AHB_SRAM
+ __IO uint32_t tmpreg;
+#endif /* DATA_IN_CD_AHB_SRAM */
+
+ /* 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 &= 0xEAF6ED7FU;
+
+ /* Reset CDCFGR1 register */
+ RCC->CDCFGR1 = 0x00000000;
+
+ /* Reset CDCFGR2 register */
+ RCC->CDCFGR2 = 0x00000000;
+
+ /* Reset SRDCFGR register */
+ RCC->SRDCFGR = 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 &= 0xFFFBFFFFU;
+
+ /* Disable all interrupts */
+ RCC->CIER = 0x00000000;
+
+#ifdef DATA_IN_CD_AHB_SRAM
+ /* in case of initialized data in CD AHB SRAM, enable the CD AHB SRAM clock */
+ RCC->AHB2ENR |= (RCC_AHB2ENR_AHBSRAM1EN | RCC_AHB2ENR_AHBSRAM2EN);
+ tmpreg = RCC->AHB2ENR;
+ (void) tmpreg;
+#endif /* DATA_IN_CD_AHB_SRAM */
+/*
+ * Disable the FMC bank1 (enabled after reset).
+ * This, prevents CPU speculation access on this bank which blocks the use of FMC during
+ * 24us. During this time the others FMC master (such as LTDC) cannot use it!
+ */
+ FMC_Bank1_R->BTCR[0] = 0x000030D2;
+
+ /* Configure the Vector Table location add offset address for cortex-M7 ------------------*/
+#ifdef VECT_TAB_SRAM
+ SCB->VTOR = CD_AXISRAM1_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal CD AXI-RAM */
+#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, pllsource, pllm, pllfracen, hsivalue, tmp;
+ float_t fracn1, pllvco;
+
+ /* Get SYSCLK source -------------------------------------------------------*/
+
+ switch (RCC->CFGR & RCC_CFGR_SWS)
+ {
+ case RCC_CFGR_SWS_HSI: /* HSI used as system clock source */
+ SystemCoreClock = (uint32_t) (HSI_VALUE >> ((RCC->CR & RCC_CR_HSIDIV)>> 3));
+ break;
+
+ case RCC_CFGR_SWS_CSI: /* CSI used as system clock source */
+ SystemCoreClock = CSI_VALUE;
+ break;
+
+ case RCC_CFGR_SWS_HSE: /* HSE used as system clock source */
+ SystemCoreClock = HSE_VALUE;
+ break;
+
+ case RCC_CFGR_SWS_PLL1: /* 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)>>RCC_PLLCFGR_PLL1FRACEN_Pos);
+ fracn1 = (float_t)(uint32_t)(pllfracen* ((RCC->PLL1FRACR & RCC_PLL1FRACR_FRACN1)>> 3));
+
+ if (pllm != 0U)
+ {
+ switch (pllsource)
+ {
+ case RCC_PLLCKSELR_PLLSRC_HSI: /* HSI used as PLL clock source */
+
+ hsivalue = (HSI_VALUE >> ((RCC->CR & RCC_CR_HSIDIV)>> 3)) ;
+ pllvco = ( (float_t)hsivalue / (float_t)pllm) * ((float_t)(uint32_t)(RCC->PLL1DIVR & RCC_PLL1DIVR_N1) + (fracn1/(float_t)0x2000) +(float_t)1 );
+
+ break;
+
+ case RCC_PLLCKSELR_PLLSRC_CSI: /* CSI used as PLL clock source */
+ pllvco = ((float_t)CSI_VALUE / (float_t)pllm) * ((float_t)(uint32_t)(RCC->PLL1DIVR & RCC_PLL1DIVR_N1) + (fracn1/(float_t)0x2000) +(float_t)1 );
+ break;
+
+ case RCC_PLLCKSELR_PLLSRC_HSE: /* HSE used as PLL clock source */
+ pllvco = ((float_t)HSE_VALUE / (float_t)pllm) * ((float_t)(uint32_t)(RCC->PLL1DIVR & RCC_PLL1DIVR_N1) + (fracn1/(float_t)0x2000) +(float_t)1 );
+ break;
+
+ default:
+ pllvco = ((float_t)CSI_VALUE / (float_t)pllm) * ((float_t)(uint32_t)(RCC->PLL1DIVR & RCC_PLL1DIVR_N1) + (fracn1/(float_t)0x2000) +(float_t)1 );
+ break;
+ }
+ pllp = (((RCC->PLL1DIVR & RCC_PLL1DIVR_P1) >>9) + 1U ) ;
+ SystemCoreClock = (uint32_t)(float_t)(pllvco/(float_t)pllp);
+ }
+ else
+ {
+ SystemCoreClock = 0U;
+ }
+ break;
+
+ default:
+ SystemCoreClock = CSI_VALUE;
+ break;
+ }
+
+ /* Compute SystemClock frequency --------------------------------------------------*/
+
+ tmp = D1CorePrescTable[(RCC->CDCFGR1 & RCC_CDCFGR1_CDCPRE)>> RCC_CDCFGR1_CDCPRE_Pos];
+
+ /* SystemCoreClock frequency : CM7 CPU frequency */
+ SystemCoreClock >>= tmp;
+
+ /* SystemD2Clock frequency : AXI and AHBs Clock frequency */
+ SystemD2Clock = (SystemCoreClock >> ((D1CorePrescTable[(RCC->CDCFGR1 & RCC_CDCFGR1_HPRE)>> RCC_CDCFGR1_HPRE_Pos]) & 0x1FU));
+
+}
+
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
--
2.25.1
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