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targets/cmsis/TARGET_STM/TARGET_STM32F4/TARGET_MTS_MDOT_F411RE/system_stm32f4xx.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Child:
95:75b7d1f8d36d
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /**
bogdanm 0:9b334a45a8ff 2 ******************************************************************************
bogdanm 0:9b334a45a8ff 3 * @file system_stm32f4xx.c
bogdanm 0:9b334a45a8ff 4 * @author MCD Application Team
bogdanm 0:9b334a45a8ff 5 * @version V2.1.0
bogdanm 0:9b334a45a8ff 6 * @date 19-June-2014
bogdanm 0:9b334a45a8ff 7 * @brief CMSIS Cortex-M4 Device Peripheral Access Layer System Source File.
bogdanm 0:9b334a45a8ff 8 *
bogdanm 0:9b334a45a8ff 9 * This file provides two functions and one global variable to be called from
bogdanm 0:9b334a45a8ff 10 * user application:
bogdanm 0:9b334a45a8ff 11 * - SystemInit(): This function is called at startup just after reset and
bogdanm 0:9b334a45a8ff 12 * before branch to main program. This call is made inside
bogdanm 0:9b334a45a8ff 13 * the "startup_stm32f4xx.s" file.
bogdanm 0:9b334a45a8ff 14 *
bogdanm 0:9b334a45a8ff 15 * - SystemCoreClock variable: Contains the core clock (HCLK), it can be used
bogdanm 0:9b334a45a8ff 16 * by the user application to setup the SysTick
bogdanm 0:9b334a45a8ff 17 * timer or configure other parameters.
bogdanm 0:9b334a45a8ff 18 *
bogdanm 0:9b334a45a8ff 19 * - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must
bogdanm 0:9b334a45a8ff 20 * be called whenever the core clock is changed
bogdanm 0:9b334a45a8ff 21 * during program execution.
bogdanm 0:9b334a45a8ff 22 *
bogdanm 0:9b334a45a8ff 23 * This file configures the system clock as follows:
bogdanm 0:9b334a45a8ff 24 *-----------------------------------------------------------------------------
bogdanm 0:9b334a45a8ff 25 * System clock source | 1- PLL_HSE_EXTC | 3- PLL_HSI
bogdanm 0:9b334a45a8ff 26 * | (external 8 MHz clock) | (internal 16 MHz)
bogdanm 0:9b334a45a8ff 27 * | 2- PLL_HSE_XTAL |
bogdanm 0:9b334a45a8ff 28 * | (external 8 MHz xtal) |
bogdanm 0:9b334a45a8ff 29 *-----------------------------------------------------------------------------
bogdanm 0:9b334a45a8ff 30 * SYSCLK(MHz) | 96 | 96
bogdanm 0:9b334a45a8ff 31 *-----------------------------------------------------------------------------
bogdanm 0:9b334a45a8ff 32 * AHBCLK (MHz) | 96 | 96
bogdanm 0:9b334a45a8ff 33 *-----------------------------------------------------------------------------
bogdanm 0:9b334a45a8ff 34 * APB1CLK (MHz) | 48 | 48
bogdanm 0:9b334a45a8ff 35 *-----------------------------------------------------------------------------
bogdanm 0:9b334a45a8ff 36 * APB2CLK (MHz) | 96 | 96
bogdanm 0:9b334a45a8ff 37 *-----------------------------------------------------------------------------
bogdanm 0:9b334a45a8ff 38 * USB capable (48 MHz precise clock) | YES | NO
bogdanm 0:9b334a45a8ff 39 *-----------------------------------------------------------------------------
bogdanm 0:9b334a45a8ff 40 ******************************************************************************
bogdanm 0:9b334a45a8ff 41 * @attention
bogdanm 0:9b334a45a8ff 42 *
bogdanm 0:9b334a45a8ff 43 * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
bogdanm 0:9b334a45a8ff 44 *
bogdanm 0:9b334a45a8ff 45 * Redistribution and use in source and binary forms, with or without modification,
bogdanm 0:9b334a45a8ff 46 * are permitted provided that the following conditions are met:
bogdanm 0:9b334a45a8ff 47 * 1. Redistributions of source code must retain the above copyright notice,
bogdanm 0:9b334a45a8ff 48 * this list of conditions and the following disclaimer.
bogdanm 0:9b334a45a8ff 49 * 2. Redistributions in binary form must reproduce the above copyright notice,
bogdanm 0:9b334a45a8ff 50 * this list of conditions and the following disclaimer in the documentation
bogdanm 0:9b334a45a8ff 51 * and/or other materials provided with the distribution.
bogdanm 0:9b334a45a8ff 52 * 3. Neither the name of STMicroelectronics nor the names of its contributors
bogdanm 0:9b334a45a8ff 53 * may be used to endorse or promote products derived from this software
bogdanm 0:9b334a45a8ff 54 * without specific prior written permission.
bogdanm 0:9b334a45a8ff 55 *
bogdanm 0:9b334a45a8ff 56 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
bogdanm 0:9b334a45a8ff 57 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
bogdanm 0:9b334a45a8ff 58 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
bogdanm 0:9b334a45a8ff 59 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
bogdanm 0:9b334a45a8ff 60 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
bogdanm 0:9b334a45a8ff 61 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
bogdanm 0:9b334a45a8ff 62 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
bogdanm 0:9b334a45a8ff 63 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
bogdanm 0:9b334a45a8ff 64 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
bogdanm 0:9b334a45a8ff 65 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
bogdanm 0:9b334a45a8ff 66 *
bogdanm 0:9b334a45a8ff 67 ******************************************************************************
bogdanm 0:9b334a45a8ff 68 */
bogdanm 0:9b334a45a8ff 69
bogdanm 0:9b334a45a8ff 70 /** @addtogroup CMSIS
bogdanm 0:9b334a45a8ff 71 * @{
bogdanm 0:9b334a45a8ff 72 */
bogdanm 0:9b334a45a8ff 73
bogdanm 0:9b334a45a8ff 74 /** @addtogroup stm32f4xx_system
bogdanm 0:9b334a45a8ff 75 * @{
bogdanm 0:9b334a45a8ff 76 */
bogdanm 0:9b334a45a8ff 77
bogdanm 0:9b334a45a8ff 78 /** @addtogroup STM32F4xx_System_Private_Includes
bogdanm 0:9b334a45a8ff 79 * @{
bogdanm 0:9b334a45a8ff 80 */
bogdanm 0:9b334a45a8ff 81
bogdanm 0:9b334a45a8ff 82
bogdanm 0:9b334a45a8ff 83 #include "stm32f4xx.h"
bogdanm 0:9b334a45a8ff 84 #include "hal_tick.h"
bogdanm 0:9b334a45a8ff 85
bogdanm 0:9b334a45a8ff 86 #if !defined (HSE_VALUE)
bogdanm 0:9b334a45a8ff 87 #define HSE_VALUE ((uint32_t)8000000) /*!< Default value of the External oscillator in Hz */
bogdanm 0:9b334a45a8ff 88 #endif /* HSE_VALUE */
bogdanm 0:9b334a45a8ff 89
bogdanm 0:9b334a45a8ff 90 #if !defined (HSI_VALUE)
bogdanm 0:9b334a45a8ff 91 #define HSI_VALUE ((uint32_t)16000000) /*!< Value of the Internal oscillator in Hz*/
bogdanm 0:9b334a45a8ff 92 #endif /* HSI_VALUE */
bogdanm 0:9b334a45a8ff 93
bogdanm 0:9b334a45a8ff 94 /**
bogdanm 0:9b334a45a8ff 95 * @}
bogdanm 0:9b334a45a8ff 96 */
bogdanm 0:9b334a45a8ff 97
bogdanm 0:9b334a45a8ff 98 /** @addtogroup STM32F4xx_System_Private_TypesDefinitions
bogdanm 0:9b334a45a8ff 99 * @{
bogdanm 0:9b334a45a8ff 100 */
bogdanm 0:9b334a45a8ff 101
bogdanm 0:9b334a45a8ff 102 /**
bogdanm 0:9b334a45a8ff 103 * @}
bogdanm 0:9b334a45a8ff 104 */
bogdanm 0:9b334a45a8ff 105
bogdanm 0:9b334a45a8ff 106 /** @addtogroup STM32F4xx_System_Private_Defines
bogdanm 0:9b334a45a8ff 107 * @{
bogdanm 0:9b334a45a8ff 108 */
bogdanm 0:9b334a45a8ff 109
bogdanm 0:9b334a45a8ff 110 /************************* Miscellaneous Configuration ************************/
bogdanm 0:9b334a45a8ff 111 /*!< Uncomment the following line if you need to use external SRAM or SDRAM mounted
bogdanm 0:9b334a45a8ff 112 on STM324xG_EVAL/STM324x9I_EVAL boards as data memory */
bogdanm 0:9b334a45a8ff 113 #if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx) || defined(STM32F417xx) || defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx)
bogdanm 0:9b334a45a8ff 114 /* #define DATA_IN_ExtSRAM */
bogdanm 0:9b334a45a8ff 115 #endif /* STM32F405xx || STM32F415xx || STM32F407xx || STM32F417xx || STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */
bogdanm 0:9b334a45a8ff 116
bogdanm 0:9b334a45a8ff 117 #if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx)
bogdanm 0:9b334a45a8ff 118 /* #define DATA_IN_ExtSDRAM */
bogdanm 0:9b334a45a8ff 119 #endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */
bogdanm 0:9b334a45a8ff 120
bogdanm 0:9b334a45a8ff 121 #if defined(DATA_IN_ExtSRAM) && defined(DATA_IN_ExtSDRAM)
bogdanm 0:9b334a45a8ff 122 #error "Please select DATA_IN_ExtSRAM or DATA_IN_ExtSDRAM "
bogdanm 0:9b334a45a8ff 123 #endif /* DATA_IN_ExtSRAM && DATA_IN_ExtSDRAM */
bogdanm 0:9b334a45a8ff 124
bogdanm 0:9b334a45a8ff 125 /*!< Uncomment the following line if you need to relocate your vector Table in
bogdanm 0:9b334a45a8ff 126 Internal SRAM. */
bogdanm 0:9b334a45a8ff 127 /* #define VECT_TAB_SRAM */
bogdanm 0:9b334a45a8ff 128 #ifndef VECT_TAB_OFFSET
bogdanm 0:9b334a45a8ff 129 #define VECT_TAB_OFFSET 0x00 /*!< Vector Table base offset field.
bogdanm 0:9b334a45a8ff 130 This value must be a multiple of 0x200. */
bogdanm 0:9b334a45a8ff 131 #endif
bogdanm 0:9b334a45a8ff 132 /******************************************************************************/
bogdanm 0:9b334a45a8ff 133
bogdanm 0:9b334a45a8ff 134 /**
bogdanm 0:9b334a45a8ff 135 * @}
bogdanm 0:9b334a45a8ff 136 */
bogdanm 0:9b334a45a8ff 137
bogdanm 0:9b334a45a8ff 138 /** @addtogroup STM32F4xx_System_Private_Macros
bogdanm 0:9b334a45a8ff 139 * @{
bogdanm 0:9b334a45a8ff 140 */
bogdanm 0:9b334a45a8ff 141
bogdanm 0:9b334a45a8ff 142 /* Select the clock sources (other than HSI) to start with (0=OFF, 1=ON) */
bogdanm 0:9b334a45a8ff 143 #if !defined (USE_PLL_HSE_EXTC)
bogdanm 0:9b334a45a8ff 144 #define USE_PLL_HSE_EXTC (1) /* Use external clock */
bogdanm 0:9b334a45a8ff 145 #endif
bogdanm 0:9b334a45a8ff 146 #if !defined (USE_PLL_HSE_XTAL)
bogdanm 0:9b334a45a8ff 147 #define USE_PLL_HSE_XTAL (1) /* Use external xtal */
bogdanm 0:9b334a45a8ff 148 #endif
bogdanm 0:9b334a45a8ff 149
bogdanm 0:9b334a45a8ff 150 /**
bogdanm 0:9b334a45a8ff 151 * @}
bogdanm 0:9b334a45a8ff 152 */
bogdanm 0:9b334a45a8ff 153
bogdanm 0:9b334a45a8ff 154 /** @addtogroup STM32F4xx_System_Private_Variables
bogdanm 0:9b334a45a8ff 155 * @{
bogdanm 0:9b334a45a8ff 156 */
bogdanm 0:9b334a45a8ff 157 /* This variable is updated in three ways:
bogdanm 0:9b334a45a8ff 158 1) by calling CMSIS function SystemCoreClockUpdate()
bogdanm 0:9b334a45a8ff 159 2) by calling HAL API function HAL_RCC_GetHCLKFreq()
bogdanm 0:9b334a45a8ff 160 3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
bogdanm 0:9b334a45a8ff 161 Note: If you use this function to configure the system clock; then there
bogdanm 0:9b334a45a8ff 162 is no need to call the 2 first functions listed above, since SystemCoreClock
bogdanm 0:9b334a45a8ff 163 variable is updated automatically.
bogdanm 0:9b334a45a8ff 164 */
bogdanm 0:9b334a45a8ff 165 uint32_t SystemCoreClock = 16000000;
bogdanm 0:9b334a45a8ff 166 const uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9};
bogdanm 0:9b334a45a8ff 167
bogdanm 0:9b334a45a8ff 168 /**
bogdanm 0:9b334a45a8ff 169 * @}
bogdanm 0:9b334a45a8ff 170 */
bogdanm 0:9b334a45a8ff 171
bogdanm 0:9b334a45a8ff 172 /** @addtogroup STM32F4xx_System_Private_FunctionPrototypes
bogdanm 0:9b334a45a8ff 173 * @{
bogdanm 0:9b334a45a8ff 174 */
bogdanm 0:9b334a45a8ff 175
bogdanm 0:9b334a45a8ff 176 #if defined (DATA_IN_ExtSRAM) || defined (DATA_IN_ExtSDRAM)
bogdanm 0:9b334a45a8ff 177 static void SystemInit_ExtMemCtl(void);
bogdanm 0:9b334a45a8ff 178 #endif /* DATA_IN_ExtSRAM || DATA_IN_ExtSDRAM */
bogdanm 0:9b334a45a8ff 179
bogdanm 0:9b334a45a8ff 180 #if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
bogdanm 0:9b334a45a8ff 181 uint8_t SetSysClock_PLL_HSE(uint8_t bypass);
bogdanm 0:9b334a45a8ff 182 #endif
bogdanm 0:9b334a45a8ff 183
bogdanm 0:9b334a45a8ff 184 uint8_t SetSysClock_PLL_HSI(void);
bogdanm 0:9b334a45a8ff 185
bogdanm 0:9b334a45a8ff 186 /**
bogdanm 0:9b334a45a8ff 187 * @}
bogdanm 0:9b334a45a8ff 188 */
bogdanm 0:9b334a45a8ff 189
bogdanm 0:9b334a45a8ff 190 /** @addtogroup STM32F4xx_System_Private_Functions
bogdanm 0:9b334a45a8ff 191 * @{
bogdanm 0:9b334a45a8ff 192 */
bogdanm 0:9b334a45a8ff 193
bogdanm 0:9b334a45a8ff 194 /**
bogdanm 0:9b334a45a8ff 195 * @brief Setup the microcontroller system
bogdanm 0:9b334a45a8ff 196 * Initialize the FPU setting, vector table location and External memory
bogdanm 0:9b334a45a8ff 197 * configuration.
bogdanm 0:9b334a45a8ff 198 * @param None
bogdanm 0:9b334a45a8ff 199 * @retval None
bogdanm 0:9b334a45a8ff 200 */
bogdanm 0:9b334a45a8ff 201 void SystemInit(void)
bogdanm 0:9b334a45a8ff 202 {
bogdanm 0:9b334a45a8ff 203 /* FPU settings ------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 204 #if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
bogdanm 0:9b334a45a8ff 205 SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */
bogdanm 0:9b334a45a8ff 206 #endif
bogdanm 0:9b334a45a8ff 207 /* Reset the RCC clock configuration to the default reset state ------------*/
bogdanm 0:9b334a45a8ff 208 /* Set HSION bit */
bogdanm 0:9b334a45a8ff 209 RCC->CR |= (uint32_t)0x00000001;
bogdanm 0:9b334a45a8ff 210
bogdanm 0:9b334a45a8ff 211 /* Reset CFGR register */
bogdanm 0:9b334a45a8ff 212 RCC->CFGR = 0x00000000;
bogdanm 0:9b334a45a8ff 213
bogdanm 0:9b334a45a8ff 214 /* Reset HSEON, CSSON and PLLON bits */
bogdanm 0:9b334a45a8ff 215 RCC->CR &= (uint32_t)0xFEF6FFFF;
bogdanm 0:9b334a45a8ff 216
bogdanm 0:9b334a45a8ff 217 /* Reset PLLCFGR register */
bogdanm 0:9b334a45a8ff 218 RCC->PLLCFGR = 0x24003010;
bogdanm 0:9b334a45a8ff 219
bogdanm 0:9b334a45a8ff 220 /* Reset HSEBYP bit */
bogdanm 0:9b334a45a8ff 221 RCC->CR &= (uint32_t)0xFFFBFFFF;
bogdanm 0:9b334a45a8ff 222
bogdanm 0:9b334a45a8ff 223 /* Disable all interrupts */
bogdanm 0:9b334a45a8ff 224 RCC->CIR = 0x00000000;
bogdanm 0:9b334a45a8ff 225
bogdanm 0:9b334a45a8ff 226 #if defined (DATA_IN_ExtSRAM) || defined (DATA_IN_ExtSDRAM)
bogdanm 0:9b334a45a8ff 227 SystemInit_ExtMemCtl();
bogdanm 0:9b334a45a8ff 228 #endif /* DATA_IN_ExtSRAM || DATA_IN_ExtSDRAM */
bogdanm 0:9b334a45a8ff 229
bogdanm 0:9b334a45a8ff 230 /* Configure the Vector Table location add offset address ------------------*/
bogdanm 0:9b334a45a8ff 231 #ifdef VECT_TAB_SRAM
bogdanm 0:9b334a45a8ff 232 SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
bogdanm 0:9b334a45a8ff 233 #else
bogdanm 0:9b334a45a8ff 234 SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
bogdanm 0:9b334a45a8ff 235 #endif
bogdanm 0:9b334a45a8ff 236
bogdanm 0:9b334a45a8ff 237 /* Configure the Cube driver */
bogdanm 0:9b334a45a8ff 238 SystemCoreClock = 16000000; // At this stage the HSI is used as system clock
bogdanm 0:9b334a45a8ff 239 HAL_Init();
bogdanm 0:9b334a45a8ff 240
bogdanm 0:9b334a45a8ff 241 /* Configure the System clock source, PLL Multiplier and Divider factors,
bogdanm 0:9b334a45a8ff 242 AHB/APBx prescalers and Flash settings */
bogdanm 0:9b334a45a8ff 243 SetSysClock();
bogdanm 0:9b334a45a8ff 244
bogdanm 0:9b334a45a8ff 245 /* Reset the timer to avoid issues after the RAM initialization */
bogdanm 0:9b334a45a8ff 246 TIM_MST_RESET_ON;
bogdanm 0:9b334a45a8ff 247 TIM_MST_RESET_OFF;
bogdanm 0:9b334a45a8ff 248 }
bogdanm 0:9b334a45a8ff 249
bogdanm 0:9b334a45a8ff 250 /**
bogdanm 0:9b334a45a8ff 251 * @brief Update SystemCoreClock variable according to Clock Register Values.
bogdanm 0:9b334a45a8ff 252 * The SystemCoreClock variable contains the core clock (HCLK), it can
bogdanm 0:9b334a45a8ff 253 * be used by the user application to setup the SysTick timer or configure
bogdanm 0:9b334a45a8ff 254 * other parameters.
bogdanm 0:9b334a45a8ff 255 *
bogdanm 0:9b334a45a8ff 256 * @note Each time the core clock (HCLK) changes, this function must be called
bogdanm 0:9b334a45a8ff 257 * to update SystemCoreClock variable value. Otherwise, any configuration
bogdanm 0:9b334a45a8ff 258 * based on this variable will be incorrect.
bogdanm 0:9b334a45a8ff 259 *
bogdanm 0:9b334a45a8ff 260 * @note - The system frequency computed by this function is not the real
bogdanm 0:9b334a45a8ff 261 * frequency in the chip. It is calculated based on the predefined
bogdanm 0:9b334a45a8ff 262 * constant and the selected clock source:
bogdanm 0:9b334a45a8ff 263 *
bogdanm 0:9b334a45a8ff 264 * - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(*)
bogdanm 0:9b334a45a8ff 265 *
bogdanm 0:9b334a45a8ff 266 * - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(**)
bogdanm 0:9b334a45a8ff 267 *
bogdanm 0:9b334a45a8ff 268 * - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(**)
bogdanm 0:9b334a45a8ff 269 * or HSI_VALUE(*) multiplied/divided by the PLL factors.
bogdanm 0:9b334a45a8ff 270 *
bogdanm 0:9b334a45a8ff 271 * (*) HSI_VALUE is a constant defined in stm32f4xx_hal_conf.h file (default value
bogdanm 0:9b334a45a8ff 272 * 16 MHz) but the real value may vary depending on the variations
bogdanm 0:9b334a45a8ff 273 * in voltage and temperature.
bogdanm 0:9b334a45a8ff 274 *
bogdanm 0:9b334a45a8ff 275 * (**) HSE_VALUE is a constant defined in stm32f4xx_hal_conf.h file (its value
bogdanm 0:9b334a45a8ff 276 * depends on the application requirements), user has to ensure that HSE_VALUE
bogdanm 0:9b334a45a8ff 277 * is same as the real frequency of the crystal used. Otherwise, this function
bogdanm 0:9b334a45a8ff 278 * may have wrong result.
bogdanm 0:9b334a45a8ff 279 *
bogdanm 0:9b334a45a8ff 280 * - The result of this function could be not correct when using fractional
bogdanm 0:9b334a45a8ff 281 * value for HSE crystal.
bogdanm 0:9b334a45a8ff 282 *
bogdanm 0:9b334a45a8ff 283 * @param None
bogdanm 0:9b334a45a8ff 284 * @retval None
bogdanm 0:9b334a45a8ff 285 */
bogdanm 0:9b334a45a8ff 286 void SystemCoreClockUpdate(void)
bogdanm 0:9b334a45a8ff 287 {
bogdanm 0:9b334a45a8ff 288 uint32_t tmp = 0, pllvco = 0, pllp = 2, pllsource = 0, pllm = 2;
bogdanm 0:9b334a45a8ff 289
bogdanm 0:9b334a45a8ff 290 /* Get SYSCLK source -------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 291 tmp = RCC->CFGR & RCC_CFGR_SWS;
bogdanm 0:9b334a45a8ff 292
bogdanm 0:9b334a45a8ff 293 switch (tmp)
bogdanm 0:9b334a45a8ff 294 {
bogdanm 0:9b334a45a8ff 295 case 0x00: /* HSI used as system clock source */
bogdanm 0:9b334a45a8ff 296 SystemCoreClock = HSI_VALUE;
bogdanm 0:9b334a45a8ff 297 break;
bogdanm 0:9b334a45a8ff 298 case 0x04: /* HSE used as system clock source */
bogdanm 0:9b334a45a8ff 299 SystemCoreClock = HSE_VALUE;
bogdanm 0:9b334a45a8ff 300 break;
bogdanm 0:9b334a45a8ff 301 case 0x08: /* PLL used as system clock source */
bogdanm 0:9b334a45a8ff 302
bogdanm 0:9b334a45a8ff 303 /* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLL_M) * PLL_N
bogdanm 0:9b334a45a8ff 304 SYSCLK = PLL_VCO / PLL_P
bogdanm 0:9b334a45a8ff 305 */
bogdanm 0:9b334a45a8ff 306 pllsource = (RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC) >> 22;
bogdanm 0:9b334a45a8ff 307 pllm = RCC->PLLCFGR & RCC_PLLCFGR_PLLM;
bogdanm 0:9b334a45a8ff 308
bogdanm 0:9b334a45a8ff 309 if (pllsource != 0)
bogdanm 0:9b334a45a8ff 310 {
bogdanm 0:9b334a45a8ff 311 /* HSE used as PLL clock source */
bogdanm 0:9b334a45a8ff 312 pllvco = (HSE_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 6);
bogdanm 0:9b334a45a8ff 313 }
bogdanm 0:9b334a45a8ff 314 else
bogdanm 0:9b334a45a8ff 315 {
bogdanm 0:9b334a45a8ff 316 /* HSI used as PLL clock source */
bogdanm 0:9b334a45a8ff 317 pllvco = (HSI_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 6);
bogdanm 0:9b334a45a8ff 318 }
bogdanm 0:9b334a45a8ff 319
bogdanm 0:9b334a45a8ff 320 pllp = (((RCC->PLLCFGR & RCC_PLLCFGR_PLLP) >>16) + 1 ) *2;
bogdanm 0:9b334a45a8ff 321 SystemCoreClock = pllvco/pllp;
bogdanm 0:9b334a45a8ff 322 break;
bogdanm 0:9b334a45a8ff 323 default:
bogdanm 0:9b334a45a8ff 324 SystemCoreClock = HSI_VALUE;
bogdanm 0:9b334a45a8ff 325 break;
bogdanm 0:9b334a45a8ff 326 }
bogdanm 0:9b334a45a8ff 327 /* Compute HCLK frequency --------------------------------------------------*/
bogdanm 0:9b334a45a8ff 328 /* Get HCLK prescaler */
bogdanm 0:9b334a45a8ff 329 tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)];
bogdanm 0:9b334a45a8ff 330 /* HCLK frequency */
bogdanm 0:9b334a45a8ff 331 SystemCoreClock >>= tmp;
bogdanm 0:9b334a45a8ff 332 }
bogdanm 0:9b334a45a8ff 333
bogdanm 0:9b334a45a8ff 334 #if defined (DATA_IN_ExtSRAM) || defined (DATA_IN_ExtSDRAM)
bogdanm 0:9b334a45a8ff 335 /**
bogdanm 0:9b334a45a8ff 336 * @brief Setup the external memory controller.
bogdanm 0:9b334a45a8ff 337 * Called in startup_stm32f4xx.s before jump to main.
bogdanm 0:9b334a45a8ff 338 * This function configures the external memories (SRAM/SDRAM)
bogdanm 0:9b334a45a8ff 339 * This SRAM/SDRAM will be used as program data memory (including heap and stack).
bogdanm 0:9b334a45a8ff 340 * @param None
bogdanm 0:9b334a45a8ff 341 * @retval None
bogdanm 0:9b334a45a8ff 342 */
bogdanm 0:9b334a45a8ff 343 void SystemInit_ExtMemCtl(void)
bogdanm 0:9b334a45a8ff 344 {
bogdanm 0:9b334a45a8ff 345 #if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx)
bogdanm 0:9b334a45a8ff 346 #if defined (DATA_IN_ExtSDRAM)
bogdanm 0:9b334a45a8ff 347 register uint32_t tmpreg = 0, timeout = 0xFFFF;
bogdanm 0:9b334a45a8ff 348 register uint32_t index;
bogdanm 0:9b334a45a8ff 349
bogdanm 0:9b334a45a8ff 350 /* Enable GPIOC, GPIOD, GPIOE, GPIOF, GPIOG, GPIOH and GPIOI interface
bogdanm 0:9b334a45a8ff 351 clock */
bogdanm 0:9b334a45a8ff 352 RCC->AHB1ENR |= 0x000001F8;
bogdanm 0:9b334a45a8ff 353
bogdanm 0:9b334a45a8ff 354 /* Connect PDx pins to FMC Alternate function */
bogdanm 0:9b334a45a8ff 355 GPIOD->AFR[0] = 0x000000CC;
bogdanm 0:9b334a45a8ff 356 GPIOD->AFR[1] = 0xCC000CCC;
bogdanm 0:9b334a45a8ff 357 /* Configure PDx pins in Alternate function mode */
bogdanm 0:9b334a45a8ff 358 GPIOD->MODER = 0xA02A000A;
bogdanm 0:9b334a45a8ff 359 /* Configure PDx pins speed to 50 MHz */
bogdanm 0:9b334a45a8ff 360 GPIOD->OSPEEDR = 0xA02A000A;
bogdanm 0:9b334a45a8ff 361 /* Configure PDx pins Output type to push-pull */
bogdanm 0:9b334a45a8ff 362 GPIOD->OTYPER = 0x00000000;
bogdanm 0:9b334a45a8ff 363 /* No pull-up, pull-down for PDx pins */
bogdanm 0:9b334a45a8ff 364 GPIOD->PUPDR = 0x00000000;
bogdanm 0:9b334a45a8ff 365
bogdanm 0:9b334a45a8ff 366 /* Connect PEx pins to FMC Alternate function */
bogdanm 0:9b334a45a8ff 367 GPIOE->AFR[0] = 0xC00000CC;
bogdanm 0:9b334a45a8ff 368 GPIOE->AFR[1] = 0xCCCCCCCC;
bogdanm 0:9b334a45a8ff 369 /* Configure PEx pins in Alternate function mode */
bogdanm 0:9b334a45a8ff 370 GPIOE->MODER = 0xAAAA800A;
bogdanm 0:9b334a45a8ff 371 /* Configure PEx pins speed to 50 MHz */
bogdanm 0:9b334a45a8ff 372 GPIOE->OSPEEDR = 0xAAAA800A;
bogdanm 0:9b334a45a8ff 373 /* Configure PEx pins Output type to push-pull */
bogdanm 0:9b334a45a8ff 374 GPIOE->OTYPER = 0x00000000;
bogdanm 0:9b334a45a8ff 375 /* No pull-up, pull-down for PEx pins */
bogdanm 0:9b334a45a8ff 376 GPIOE->PUPDR = 0x00000000;
bogdanm 0:9b334a45a8ff 377
bogdanm 0:9b334a45a8ff 378 /* Connect PFx pins to FMC Alternate function */
bogdanm 0:9b334a45a8ff 379 GPIOF->AFR[0] = 0xCCCCCCCC;
bogdanm 0:9b334a45a8ff 380 GPIOF->AFR[1] = 0xCCCCCCCC;
bogdanm 0:9b334a45a8ff 381 /* Configure PFx pins in Alternate function mode */
bogdanm 0:9b334a45a8ff 382 GPIOF->MODER = 0xAA800AAA;
bogdanm 0:9b334a45a8ff 383 /* Configure PFx pins speed to 50 MHz */
bogdanm 0:9b334a45a8ff 384 GPIOF->OSPEEDR = 0xAA800AAA;
bogdanm 0:9b334a45a8ff 385 /* Configure PFx pins Output type to push-pull */
bogdanm 0:9b334a45a8ff 386 GPIOF->OTYPER = 0x00000000;
bogdanm 0:9b334a45a8ff 387 /* No pull-up, pull-down for PFx pins */
bogdanm 0:9b334a45a8ff 388 GPIOF->PUPDR = 0x00000000;
bogdanm 0:9b334a45a8ff 389
bogdanm 0:9b334a45a8ff 390 /* Connect PGx pins to FMC Alternate function */
bogdanm 0:9b334a45a8ff 391 GPIOG->AFR[0] = 0xCCCCCCCC;
bogdanm 0:9b334a45a8ff 392 GPIOG->AFR[1] = 0xCCCCCCCC;
bogdanm 0:9b334a45a8ff 393 /* Configure PGx pins in Alternate function mode */
bogdanm 0:9b334a45a8ff 394 GPIOG->MODER = 0xAAAAAAAA;
bogdanm 0:9b334a45a8ff 395 /* Configure PGx pins speed to 50 MHz */
bogdanm 0:9b334a45a8ff 396 GPIOG->OSPEEDR = 0xAAAAAAAA;
bogdanm 0:9b334a45a8ff 397 /* Configure PGx pins Output type to push-pull */
bogdanm 0:9b334a45a8ff 398 GPIOG->OTYPER = 0x00000000;
bogdanm 0:9b334a45a8ff 399 /* No pull-up, pull-down for PGx pins */
bogdanm 0:9b334a45a8ff 400 GPIOG->PUPDR = 0x00000000;
bogdanm 0:9b334a45a8ff 401
bogdanm 0:9b334a45a8ff 402 /* Connect PHx pins to FMC Alternate function */
bogdanm 0:9b334a45a8ff 403 GPIOH->AFR[0] = 0x00C0CC00;
bogdanm 0:9b334a45a8ff 404 GPIOH->AFR[1] = 0xCCCCCCCC;
bogdanm 0:9b334a45a8ff 405 /* Configure PHx pins in Alternate function mode */
bogdanm 0:9b334a45a8ff 406 GPIOH->MODER = 0xAAAA08A0;
bogdanm 0:9b334a45a8ff 407 /* Configure PHx pins speed to 50 MHz */
bogdanm 0:9b334a45a8ff 408 GPIOH->OSPEEDR = 0xAAAA08A0;
bogdanm 0:9b334a45a8ff 409 /* Configure PHx pins Output type to push-pull */
bogdanm 0:9b334a45a8ff 410 GPIOH->OTYPER = 0x00000000;
bogdanm 0:9b334a45a8ff 411 /* No pull-up, pull-down for PHx pins */
bogdanm 0:9b334a45a8ff 412 GPIOH->PUPDR = 0x00000000;
bogdanm 0:9b334a45a8ff 413
bogdanm 0:9b334a45a8ff 414 /* Connect PIx pins to FMC Alternate function */
bogdanm 0:9b334a45a8ff 415 GPIOI->AFR[0] = 0xCCCCCCCC;
bogdanm 0:9b334a45a8ff 416 GPIOI->AFR[1] = 0x00000CC0;
bogdanm 0:9b334a45a8ff 417 /* Configure PIx pins in Alternate function mode */
bogdanm 0:9b334a45a8ff 418 GPIOI->MODER = 0x0028AAAA;
bogdanm 0:9b334a45a8ff 419 /* Configure PIx pins speed to 50 MHz */
bogdanm 0:9b334a45a8ff 420 GPIOI->OSPEEDR = 0x0028AAAA;
bogdanm 0:9b334a45a8ff 421 /* Configure PIx pins Output type to push-pull */
bogdanm 0:9b334a45a8ff 422 GPIOI->OTYPER = 0x00000000;
bogdanm 0:9b334a45a8ff 423 /* No pull-up, pull-down for PIx pins */
bogdanm 0:9b334a45a8ff 424 GPIOI->PUPDR = 0x00000000;
bogdanm 0:9b334a45a8ff 425
bogdanm 0:9b334a45a8ff 426 /*-- FMC Configuration ------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 427 /* Enable the FMC interface clock */
bogdanm 0:9b334a45a8ff 428 RCC->AHB3ENR |= 0x00000001;
bogdanm 0:9b334a45a8ff 429
bogdanm 0:9b334a45a8ff 430 /* Configure and enable SDRAM bank1 */
bogdanm 0:9b334a45a8ff 431 FMC_Bank5_6->SDCR[0] = 0x000019E0;
bogdanm 0:9b334a45a8ff 432 FMC_Bank5_6->SDTR[0] = 0x01115351;
bogdanm 0:9b334a45a8ff 433
bogdanm 0:9b334a45a8ff 434 /* SDRAM initialization sequence */
bogdanm 0:9b334a45a8ff 435 /* Clock enable command */
bogdanm 0:9b334a45a8ff 436 FMC_Bank5_6->SDCMR = 0x00000011;
bogdanm 0:9b334a45a8ff 437 tmpreg = FMC_Bank5_6->SDSR & 0x00000020;
bogdanm 0:9b334a45a8ff 438 while((tmpreg != 0) && (timeout-- > 0))
bogdanm 0:9b334a45a8ff 439 {
bogdanm 0:9b334a45a8ff 440 tmpreg = FMC_Bank5_6->SDSR & 0x00000020;
bogdanm 0:9b334a45a8ff 441 }
bogdanm 0:9b334a45a8ff 442
bogdanm 0:9b334a45a8ff 443 /* Delay */
bogdanm 0:9b334a45a8ff 444 for (index = 0; index<1000; index++);
bogdanm 0:9b334a45a8ff 445
bogdanm 0:9b334a45a8ff 446 /* PALL command */
bogdanm 0:9b334a45a8ff 447 FMC_Bank5_6->SDCMR = 0x00000012;
bogdanm 0:9b334a45a8ff 448 timeout = 0xFFFF;
bogdanm 0:9b334a45a8ff 449 while((tmpreg != 0) && (timeout-- > 0))
bogdanm 0:9b334a45a8ff 450 {
bogdanm 0:9b334a45a8ff 451 tmpreg = FMC_Bank5_6->SDSR & 0x00000020;
bogdanm 0:9b334a45a8ff 452 }
bogdanm 0:9b334a45a8ff 453
bogdanm 0:9b334a45a8ff 454 /* Auto refresh command */
bogdanm 0:9b334a45a8ff 455 FMC_Bank5_6->SDCMR = 0x00000073;
bogdanm 0:9b334a45a8ff 456 timeout = 0xFFFF;
bogdanm 0:9b334a45a8ff 457 while((tmpreg != 0) && (timeout-- > 0))
bogdanm 0:9b334a45a8ff 458 {
bogdanm 0:9b334a45a8ff 459 tmpreg = FMC_Bank5_6->SDSR & 0x00000020;
bogdanm 0:9b334a45a8ff 460 }
bogdanm 0:9b334a45a8ff 461
bogdanm 0:9b334a45a8ff 462 /* MRD register program */
bogdanm 0:9b334a45a8ff 463 FMC_Bank5_6->SDCMR = 0x00046014;
bogdanm 0:9b334a45a8ff 464 timeout = 0xFFFF;
bogdanm 0:9b334a45a8ff 465 while((tmpreg != 0) && (timeout-- > 0))
bogdanm 0:9b334a45a8ff 466 {
bogdanm 0:9b334a45a8ff 467 tmpreg = FMC_Bank5_6->SDSR & 0x00000020;
bogdanm 0:9b334a45a8ff 468 }
bogdanm 0:9b334a45a8ff 469
bogdanm 0:9b334a45a8ff 470 /* Set refresh count */
bogdanm 0:9b334a45a8ff 471 tmpreg = FMC_Bank5_6->SDRTR;
bogdanm 0:9b334a45a8ff 472 FMC_Bank5_6->SDRTR = (tmpreg | (0x0000027C<<1));
bogdanm 0:9b334a45a8ff 473
bogdanm 0:9b334a45a8ff 474 /* Disable write protection */
bogdanm 0:9b334a45a8ff 475 tmpreg = FMC_Bank5_6->SDCR[0];
bogdanm 0:9b334a45a8ff 476 FMC_Bank5_6->SDCR[0] = (tmpreg & 0xFFFFFDFF);
bogdanm 0:9b334a45a8ff 477 #endif /* DATA_IN_ExtSDRAM */
bogdanm 0:9b334a45a8ff 478 #endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */
bogdanm 0:9b334a45a8ff 479
bogdanm 0:9b334a45a8ff 480 #if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx) || defined(STM32F417xx) || defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx)
bogdanm 0:9b334a45a8ff 481 #if defined(DATA_IN_ExtSRAM)
bogdanm 0:9b334a45a8ff 482 /*-- GPIOs Configuration -----------------------------------------------------*/
bogdanm 0:9b334a45a8ff 483 /* Enable GPIOD, GPIOE, GPIOF and GPIOG interface clock */
bogdanm 0:9b334a45a8ff 484 RCC->AHB1ENR |= 0x00000078;
bogdanm 0:9b334a45a8ff 485
bogdanm 0:9b334a45a8ff 486 /* Connect PDx pins to FMC Alternate function */
bogdanm 0:9b334a45a8ff 487 GPIOD->AFR[0] = 0x00CCC0CC;
bogdanm 0:9b334a45a8ff 488 GPIOD->AFR[1] = 0xCCCCCCCC;
bogdanm 0:9b334a45a8ff 489 /* Configure PDx pins in Alternate function mode */
bogdanm 0:9b334a45a8ff 490 GPIOD->MODER = 0xAAAA0A8A;
bogdanm 0:9b334a45a8ff 491 /* Configure PDx pins speed to 100 MHz */
bogdanm 0:9b334a45a8ff 492 GPIOD->OSPEEDR = 0xFFFF0FCF;
bogdanm 0:9b334a45a8ff 493 /* Configure PDx pins Output type to push-pull */
bogdanm 0:9b334a45a8ff 494 GPIOD->OTYPER = 0x00000000;
bogdanm 0:9b334a45a8ff 495 /* No pull-up, pull-down for PDx pins */
bogdanm 0:9b334a45a8ff 496 GPIOD->PUPDR = 0x00000000;
bogdanm 0:9b334a45a8ff 497
bogdanm 0:9b334a45a8ff 498 /* Connect PEx pins to FMC Alternate function */
bogdanm 0:9b334a45a8ff 499 GPIOE->AFR[0] = 0xC00CC0CC;
bogdanm 0:9b334a45a8ff 500 GPIOE->AFR[1] = 0xCCCCCCCC;
bogdanm 0:9b334a45a8ff 501 /* Configure PEx pins in Alternate function mode */
bogdanm 0:9b334a45a8ff 502 GPIOE->MODER = 0xAAAA828A;
bogdanm 0:9b334a45a8ff 503 /* Configure PEx pins speed to 100 MHz */
bogdanm 0:9b334a45a8ff 504 GPIOE->OSPEEDR = 0xFFFFC3CF;
bogdanm 0:9b334a45a8ff 505 /* Configure PEx pins Output type to push-pull */
bogdanm 0:9b334a45a8ff 506 GPIOE->OTYPER = 0x00000000;
bogdanm 0:9b334a45a8ff 507 /* No pull-up, pull-down for PEx pins */
bogdanm 0:9b334a45a8ff 508 GPIOE->PUPDR = 0x00000000;
bogdanm 0:9b334a45a8ff 509
bogdanm 0:9b334a45a8ff 510 /* Connect PFx pins to FMC Alternate function */
bogdanm 0:9b334a45a8ff 511 GPIOF->AFR[0] = 0x00CCCCCC;
bogdanm 0:9b334a45a8ff 512 GPIOF->AFR[1] = 0xCCCC0000;
bogdanm 0:9b334a45a8ff 513 /* Configure PFx pins in Alternate function mode */
bogdanm 0:9b334a45a8ff 514 GPIOF->MODER = 0xAA000AAA;
bogdanm 0:9b334a45a8ff 515 /* Configure PFx pins speed to 100 MHz */
bogdanm 0:9b334a45a8ff 516 GPIOF->OSPEEDR = 0xFF000FFF;
bogdanm 0:9b334a45a8ff 517 /* Configure PFx pins Output type to push-pull */
bogdanm 0:9b334a45a8ff 518 GPIOF->OTYPER = 0x00000000;
bogdanm 0:9b334a45a8ff 519 /* No pull-up, pull-down for PFx pins */
bogdanm 0:9b334a45a8ff 520 GPIOF->PUPDR = 0x00000000;
bogdanm 0:9b334a45a8ff 521
bogdanm 0:9b334a45a8ff 522 /* Connect PGx pins to FMC Alternate function */
bogdanm 0:9b334a45a8ff 523 GPIOG->AFR[0] = 0x00CCCCCC;
bogdanm 0:9b334a45a8ff 524 GPIOG->AFR[1] = 0x000000C0;
bogdanm 0:9b334a45a8ff 525 /* Configure PGx pins in Alternate function mode */
bogdanm 0:9b334a45a8ff 526 GPIOG->MODER = 0x00085AAA;
bogdanm 0:9b334a45a8ff 527 /* Configure PGx pins speed to 100 MHz */
bogdanm 0:9b334a45a8ff 528 GPIOG->OSPEEDR = 0x000CAFFF;
bogdanm 0:9b334a45a8ff 529 /* Configure PGx pins Output type to push-pull */
bogdanm 0:9b334a45a8ff 530 GPIOG->OTYPER = 0x00000000;
bogdanm 0:9b334a45a8ff 531 /* No pull-up, pull-down for PGx pins */
bogdanm 0:9b334a45a8ff 532 GPIOG->PUPDR = 0x00000000;
bogdanm 0:9b334a45a8ff 533
bogdanm 0:9b334a45a8ff 534 /*-- FMC/FSMC Configuration --------------------------------------------------*/
bogdanm 0:9b334a45a8ff 535 /* Enable the FMC/FSMC interface clock */
bogdanm 0:9b334a45a8ff 536 RCC->AHB3ENR |= 0x00000001;
bogdanm 0:9b334a45a8ff 537
bogdanm 0:9b334a45a8ff 538 #if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx)|| defined(STM32F439xx)
bogdanm 0:9b334a45a8ff 539 /* Configure and enable Bank1_SRAM2 */
bogdanm 0:9b334a45a8ff 540 FMC_Bank1->BTCR[2] = 0x00001011;
bogdanm 0:9b334a45a8ff 541 FMC_Bank1->BTCR[3] = 0x00000201;
bogdanm 0:9b334a45a8ff 542 FMC_Bank1E->BWTR[2] = 0x0fffffff;
bogdanm 0:9b334a45a8ff 543 #endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */
bogdanm 0:9b334a45a8ff 544
bogdanm 0:9b334a45a8ff 545 #if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx)|| defined(STM32F417xx)
bogdanm 0:9b334a45a8ff 546 /* Configure and enable Bank1_SRAM2 */
bogdanm 0:9b334a45a8ff 547 FSMC_Bank1->BTCR[2] = 0x00001011;
bogdanm 0:9b334a45a8ff 548 FSMC_Bank1->BTCR[3] = 0x00000201;
bogdanm 0:9b334a45a8ff 549 FSMC_Bank1E->BWTR[2] = 0x0FFFFFFF;
bogdanm 0:9b334a45a8ff 550 #endif /* STM32F405xx || STM32F415xx || STM32F407xx || STM32F417xx */
bogdanm 0:9b334a45a8ff 551
bogdanm 0:9b334a45a8ff 552 #endif /* DATA_IN_ExtSRAM */
bogdanm 0:9b334a45a8ff 553 #endif /* STM32F405xx || STM32F415xx || STM32F407xx || STM32F417xx || STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */
bogdanm 0:9b334a45a8ff 554 }
bogdanm 0:9b334a45a8ff 555 #endif /* DATA_IN_ExtSRAM || DATA_IN_ExtSDRAM */
bogdanm 0:9b334a45a8ff 556
bogdanm 0:9b334a45a8ff 557 /**
bogdanm 0:9b334a45a8ff 558 * @brief Configures the System clock source, PLL Multiplier and Divider factors,
bogdanm 0:9b334a45a8ff 559 * AHB/APBx prescalers and Flash settings
bogdanm 0:9b334a45a8ff 560 * @note This function should be called only once the RCC clock configuration
bogdanm 0:9b334a45a8ff 561 * is reset to the default reset state (done in SystemInit() function).
bogdanm 0:9b334a45a8ff 562 * @param None
bogdanm 0:9b334a45a8ff 563 * @retval None
bogdanm 0:9b334a45a8ff 564 */
bogdanm 0:9b334a45a8ff 565 void SetSysClock(void)
bogdanm 0:9b334a45a8ff 566 {
bogdanm 0:9b334a45a8ff 567 /* 1- Try to start with HSE and external clock */
bogdanm 0:9b334a45a8ff 568 #if USE_PLL_HSE_EXTC != 0
bogdanm 0:9b334a45a8ff 569 if (SetSysClock_PLL_HSE(1) == 0)
bogdanm 0:9b334a45a8ff 570 #endif
bogdanm 0:9b334a45a8ff 571 {
bogdanm 0:9b334a45a8ff 572 /* 2- If fail try to start with HSE and external xtal */
bogdanm 0:9b334a45a8ff 573 #if USE_PLL_HSE_XTAL != 0
bogdanm 0:9b334a45a8ff 574 if (SetSysClock_PLL_HSE(0) == 0)
bogdanm 0:9b334a45a8ff 575 #endif
bogdanm 0:9b334a45a8ff 576 {
bogdanm 0:9b334a45a8ff 577 /* 3- If fail start with HSI clock */
bogdanm 0:9b334a45a8ff 578 if (SetSysClock_PLL_HSI() == 0)
bogdanm 0:9b334a45a8ff 579 {
bogdanm 0:9b334a45a8ff 580 while(1)
bogdanm 0:9b334a45a8ff 581 {
bogdanm 0:9b334a45a8ff 582 // [TODO] Put something here to tell the user that a problem occured...
bogdanm 0:9b334a45a8ff 583 }
bogdanm 0:9b334a45a8ff 584 }
bogdanm 0:9b334a45a8ff 585 }
bogdanm 0:9b334a45a8ff 586 }
bogdanm 0:9b334a45a8ff 587
bogdanm 0:9b334a45a8ff 588 /* Output clock on MCO2 pin(PC9) for debugging purpose */
bogdanm 0:9b334a45a8ff 589 //HAL_RCC_MCOConfig(RCC_MCO2, RCC_MCO2SOURCE_SYSCLK, RCC_MCODIV_4); // 100 MHz / 4 = 25 MHz
bogdanm 0:9b334a45a8ff 590 }
bogdanm 0:9b334a45a8ff 591
bogdanm 0:9b334a45a8ff 592 #if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
bogdanm 0:9b334a45a8ff 593 /******************************************************************************/
bogdanm 0:9b334a45a8ff 594 /* PLL (clocked by HSE) used as System clock source */
bogdanm 0:9b334a45a8ff 595 /******************************************************************************/
bogdanm 0:9b334a45a8ff 596 uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
bogdanm 0:9b334a45a8ff 597 {
bogdanm 0:9b334a45a8ff 598 RCC_ClkInitTypeDef RCC_ClkInitStruct;
bogdanm 0:9b334a45a8ff 599 RCC_OscInitTypeDef RCC_OscInitStruct;
bogdanm 0:9b334a45a8ff 600
bogdanm 0:9b334a45a8ff 601 /* The voltage scaling allows optimizing the power consumption when the device is
bogdanm 0:9b334a45a8ff 602 clocked below the maximum system frequency, to update the voltage scaling value
bogdanm 0:9b334a45a8ff 603 regarding system frequency refer to product datasheet. */
bogdanm 0:9b334a45a8ff 604 __PWR_CLK_ENABLE();
bogdanm 0:9b334a45a8ff 605 __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);
bogdanm 0:9b334a45a8ff 606
bogdanm 0:9b334a45a8ff 607 /* Enable HSE oscillator and activate PLL with HSE as source */
bogdanm 0:9b334a45a8ff 608 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
bogdanm 0:9b334a45a8ff 609 if (bypass == 0)
bogdanm 0:9b334a45a8ff 610 {
bogdanm 0:9b334a45a8ff 611 RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
bogdanm 0:9b334a45a8ff 612 }
bogdanm 0:9b334a45a8ff 613 else
bogdanm 0:9b334a45a8ff 614 {
bogdanm 0:9b334a45a8ff 615 RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; /* External 8 MHz clock on OSC_IN */
bogdanm 0:9b334a45a8ff 616 }
bogdanm 0:9b334a45a8ff 617 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
bogdanm 0:9b334a45a8ff 618 RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
bogdanm 0:9b334a45a8ff 619 RCC_OscInitStruct.PLL.PLLM = HSE_VALUE/1000000; // VCO input clock = 1 MHz
bogdanm 0:9b334a45a8ff 620 RCC_OscInitStruct.PLL.PLLN = 192; // VCO output clock = 192 MHz (1 MHz * 192)
bogdanm 0:9b334a45a8ff 621 RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; // PLLCLK = 96 MHz (192 MHz / 2)
bogdanm 0:9b334a45a8ff 622 RCC_OscInitStruct.PLL.PLLQ = 4; // USB clock = 48 MHz (192 MHz / 4)
bogdanm 0:9b334a45a8ff 623 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
bogdanm 0:9b334a45a8ff 624 {
bogdanm 0:9b334a45a8ff 625 return 0; // FAIL
bogdanm 0:9b334a45a8ff 626 }
bogdanm 0:9b334a45a8ff 627
bogdanm 0:9b334a45a8ff 628 /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
bogdanm 0:9b334a45a8ff 629 RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
bogdanm 0:9b334a45a8ff 630 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 96 MHz
bogdanm 0:9b334a45a8ff 631 RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 96 MHz
bogdanm 0:9b334a45a8ff 632 RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 48 MHz
bogdanm 0:9b334a45a8ff 633 RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 96 MHz
bogdanm 0:9b334a45a8ff 634 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK)
bogdanm 0:9b334a45a8ff 635 {
bogdanm 0:9b334a45a8ff 636 return 0; // FAIL
bogdanm 0:9b334a45a8ff 637 }
bogdanm 0:9b334a45a8ff 638
bogdanm 0:9b334a45a8ff 639 /* Output clock on MCO1 pin(PA8) for debugging purpose */
bogdanm 0:9b334a45a8ff 640
bogdanm 0:9b334a45a8ff 641 //if (bypass == 0)
bogdanm 0:9b334a45a8ff 642 // HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_2); // 4 MHz with xtal
bogdanm 0:9b334a45a8ff 643 //else
bogdanm 0:9b334a45a8ff 644 // HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_1); // 8 MHz with external clock
bogdanm 0:9b334a45a8ff 645
bogdanm 0:9b334a45a8ff 646 return 1; // OK
bogdanm 0:9b334a45a8ff 647 }
bogdanm 0:9b334a45a8ff 648 #endif
bogdanm 0:9b334a45a8ff 649
bogdanm 0:9b334a45a8ff 650 /******************************************************************************/
bogdanm 0:9b334a45a8ff 651 /* PLL (clocked by HSI) used as System clock source */
bogdanm 0:9b334a45a8ff 652 /******************************************************************************/
bogdanm 0:9b334a45a8ff 653 uint8_t SetSysClock_PLL_HSI(void)
bogdanm 0:9b334a45a8ff 654 {
bogdanm 0:9b334a45a8ff 655 RCC_ClkInitTypeDef RCC_ClkInitStruct;
bogdanm 0:9b334a45a8ff 656 RCC_OscInitTypeDef RCC_OscInitStruct;
bogdanm 0:9b334a45a8ff 657
bogdanm 0:9b334a45a8ff 658 /* The voltage scaling allows optimizing the power consumption when the device is
bogdanm 0:9b334a45a8ff 659 clocked below the maximum system frequency, to update the voltage scaling value
bogdanm 0:9b334a45a8ff 660 regarding system frequency refer to product datasheet. */
bogdanm 0:9b334a45a8ff 661 __PWR_CLK_ENABLE();
bogdanm 0:9b334a45a8ff 662 __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);
bogdanm 0:9b334a45a8ff 663
bogdanm 0:9b334a45a8ff 664 /* Enable HSI oscillator and activate PLL with HSI as source */
bogdanm 0:9b334a45a8ff 665 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
bogdanm 0:9b334a45a8ff 666 RCC_OscInitStruct.HSIState = RCC_HSI_ON;
bogdanm 0:9b334a45a8ff 667 RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
bogdanm 0:9b334a45a8ff 668 RCC_OscInitStruct.HSICalibrationValue = 16;
bogdanm 0:9b334a45a8ff 669 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
bogdanm 0:9b334a45a8ff 670 RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
bogdanm 0:9b334a45a8ff 671 RCC_OscInitStruct.PLL.PLLM = 16; // VCO input clock = 1 MHz (16 MHz / 16)
bogdanm 0:9b334a45a8ff 672 RCC_OscInitStruct.PLL.PLLN = 192; // VCO output clock = 192 MHz (1 MHz * 192)
bogdanm 0:9b334a45a8ff 673 RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; // PLLCLK = 96 MHz (192 MHz / 2)
bogdanm 0:9b334a45a8ff 674 RCC_OscInitStruct.PLL.PLLQ = 4; // USB clock = 48 MHz (192 MHz / 4) --> Not stable for USB
bogdanm 0:9b334a45a8ff 675 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
bogdanm 0:9b334a45a8ff 676 {
bogdanm 0:9b334a45a8ff 677 return 0; // FAIL
bogdanm 0:9b334a45a8ff 678 }
bogdanm 0:9b334a45a8ff 679
bogdanm 0:9b334a45a8ff 680 /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
bogdanm 0:9b334a45a8ff 681 RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
bogdanm 0:9b334a45a8ff 682 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 96 MHz
bogdanm 0:9b334a45a8ff 683 RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 96 MHz
bogdanm 0:9b334a45a8ff 684 RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 48 MHz
bogdanm 0:9b334a45a8ff 685 RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 96 MHz
bogdanm 0:9b334a45a8ff 686 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK)
bogdanm 0:9b334a45a8ff 687 {
bogdanm 0:9b334a45a8ff 688 return 0; // FAIL
bogdanm 0:9b334a45a8ff 689 }
bogdanm 0:9b334a45a8ff 690
bogdanm 0:9b334a45a8ff 691 /* Output clock on MCO1 pin(PA8) for debugging purpose */
bogdanm 0:9b334a45a8ff 692 //HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSI, RCC_MCODIV_1); // 16 MHz
bogdanm 0:9b334a45a8ff 693
bogdanm 0:9b334a45a8ff 694 return 1; // OK
bogdanm 0:9b334a45a8ff 695 }
bogdanm 0:9b334a45a8ff 696
bogdanm 0:9b334a45a8ff 697 /**
bogdanm 0:9b334a45a8ff 698 * @}
bogdanm 0:9b334a45a8ff 699 */
bogdanm 0:9b334a45a8ff 700
bogdanm 0:9b334a45a8ff 701 /**
bogdanm 0:9b334a45a8ff 702 * @}
bogdanm 0:9b334a45a8ff 703 */
bogdanm 0:9b334a45a8ff 704
bogdanm 0:9b334a45a8ff 705 /**
bogdanm 0:9b334a45a8ff 706 * @}
bogdanm 0:9b334a45a8ff 707 */
bogdanm 0:9b334a45a8ff 708 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/