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This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/cmsis/TARGET_STM/TARGET_NUCLEO_F401RE/system_stm32f4xx.c@126:549ba18ddd81, 2014-03-19 (annotated)

Committer:
mbed_official
Date:
Wed Mar 19 16:00:09 2014 +0000
Revision:
126:549ba18ddd81
Parent:
125:23cc3068a9e4
Child:
185:e752b4ee7de1
Synchronized with git revision cf8fd1cf86b0cd85131dd24a6ded21cc6fe04827



Full URL: https://github.com/mbedmicro/mbed/commit/cf8fd1cf86b0cd85131dd24a6ded21cc6fe04827/



Conflicts:

	workspace_tools/targets.py

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 87:085cde657901 1 /**
mbed_official 87:085cde657901 2 ******************************************************************************
mbed_official 87:085cde657901 3 * @file system_stm32f4xx.c
mbed_official 87:085cde657901 4 * @author MCD Application Team
mbed_official 106:ced8cbb51063 5 * @version V1.0.0
mbed_official 106:ced8cbb51063 6 * @date 18-February-2014
mbed_official 87:085cde657901 7 * @brief CMSIS Cortex-M4 Device Peripheral Access Layer System Source File.
mbed_official 87:085cde657901 8 *
mbed_official 87:085cde657901 9 * This file provides two functions and one global variable to be called from
mbed_official 87:085cde657901 10 * user application:
mbed_official 87:085cde657901 11 * - SystemInit(): This function is called at startup just after reset and
mbed_official 87:085cde657901 12 * before branch to main program. This call is made inside
mbed_official 87:085cde657901 13 * the "startup_stm32f4xx.s" file.
mbed_official 87:085cde657901 14 *
mbed_official 87:085cde657901 15 * - SystemCoreClock variable: Contains the core clock (HCLK), it can be used
mbed_official 87:085cde657901 16 * by the user application to setup the SysTick
mbed_official 87:085cde657901 17 * timer or configure other parameters.
mbed_official 87:085cde657901 18 *
mbed_official 87:085cde657901 19 * - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must
mbed_official 87:085cde657901 20 * be called whenever the core clock is changed
mbed_official 87:085cde657901 21 * during program execution.
mbed_official 87:085cde657901 22 *
mbed_official 87:085cde657901 23 *
mbed_official 87:085cde657901 24 ******************************************************************************
mbed_official 87:085cde657901 25 * @attention
mbed_official 87:085cde657901 26 *
mbed_official 87:085cde657901 27 * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
mbed_official 87:085cde657901 28 *
mbed_official 106:ced8cbb51063 29 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 106:ced8cbb51063 30 * are permitted provided that the following conditions are met:
mbed_official 106:ced8cbb51063 31 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 106:ced8cbb51063 32 * this list of conditions and the following disclaimer.
mbed_official 106:ced8cbb51063 33 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 106:ced8cbb51063 34 * this list of conditions and the following disclaimer in the documentation
mbed_official 106:ced8cbb51063 35 * and/or other materials provided with the distribution.
mbed_official 106:ced8cbb51063 36 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 106:ced8cbb51063 37 * may be used to endorse or promote products derived from this software
mbed_official 106:ced8cbb51063 38 * without specific prior written permission.
mbed_official 87:085cde657901 39 *
mbed_official 106:ced8cbb51063 40 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 106:ced8cbb51063 41 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 106:ced8cbb51063 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 106:ced8cbb51063 43 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 106:ced8cbb51063 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 106:ced8cbb51063 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 106:ced8cbb51063 46 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 106:ced8cbb51063 47 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 106:ced8cbb51063 48 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 106:ced8cbb51063 49 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 87:085cde657901 50 *
mbed_official 87:085cde657901 51 ******************************************************************************
mbed_official 87:085cde657901 52 */
mbed_official 87:085cde657901 53
mbed_official 87:085cde657901 54 /** @addtogroup CMSIS
mbed_official 87:085cde657901 55 * @{
mbed_official 87:085cde657901 56 */
mbed_official 87:085cde657901 57
mbed_official 87:085cde657901 58 /** @addtogroup stm32f4xx_system
mbed_official 87:085cde657901 59 * @{
mbed_official 87:085cde657901 60 */
mbed_official 87:085cde657901 61
mbed_official 87:085cde657901 62 /** @addtogroup STM32F4xx_System_Private_Includes
mbed_official 87:085cde657901 63 * @{
mbed_official 87:085cde657901 64 */
mbed_official 87:085cde657901 65
mbed_official 87:085cde657901 66 #include "stm32f4xx_hal.h"
mbed_official 87:085cde657901 67
mbed_official 87:085cde657901 68 /**
mbed_official 87:085cde657901 69 * @}
mbed_official 87:085cde657901 70 */
mbed_official 87:085cde657901 71
mbed_official 87:085cde657901 72 /** @addtogroup STM32F4xx_System_Private_TypesDefinitions
mbed_official 87:085cde657901 73 * @{
mbed_official 87:085cde657901 74 */
mbed_official 87:085cde657901 75
mbed_official 87:085cde657901 76 /**
mbed_official 87:085cde657901 77 * @}
mbed_official 87:085cde657901 78 */
mbed_official 87:085cde657901 79
mbed_official 87:085cde657901 80 /** @addtogroup STM32F4xx_System_Private_Defines
mbed_official 87:085cde657901 81 * @{
mbed_official 87:085cde657901 82 */
mbed_official 87:085cde657901 83
mbed_official 87:085cde657901 84 /************************* Miscellaneous Configuration ************************/
mbed_official 87:085cde657901 85
mbed_official 87:085cde657901 86 /*!< Uncomment the following line if you need to relocate your vector Table in
mbed_official 87:085cde657901 87 Internal SRAM. */
mbed_official 87:085cde657901 88 /* #define VECT_TAB_SRAM */
mbed_official 87:085cde657901 89 #define VECT_TAB_OFFSET 0x00 /*!< Vector Table base offset field.
mbed_official 87:085cde657901 90 This value must be a multiple of 0x200. */
mbed_official 87:085cde657901 91 /******************************************************************************/
mbed_official 87:085cde657901 92
mbed_official 87:085cde657901 93 /**
mbed_official 87:085cde657901 94 * @}
mbed_official 87:085cde657901 95 */
mbed_official 87:085cde657901 96
mbed_official 87:085cde657901 97 /** @addtogroup STM32F4xx_System_Private_Macros
mbed_official 87:085cde657901 98 * @{
mbed_official 87:085cde657901 99 */
mbed_official 87:085cde657901 100
mbed_official 87:085cde657901 101 /**
mbed_official 87:085cde657901 102 * @}
mbed_official 87:085cde657901 103 */
mbed_official 87:085cde657901 104
mbed_official 87:085cde657901 105 /** @addtogroup STM32F4xx_System_Private_Variables
mbed_official 87:085cde657901 106 * @{
mbed_official 87:085cde657901 107 */
mbed_official 87:085cde657901 108 /* This variable is updated in three ways:
mbed_official 87:085cde657901 109 1) by calling CMSIS function SystemCoreClockUpdate()
mbed_official 87:085cde657901 110 2) by calling HAL API function HAL_RCC_GetHCLKFreq()
mbed_official 87:085cde657901 111 3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
mbed_official 87:085cde657901 112 Note: If you use this function to configure the system clock; then there
mbed_official 87:085cde657901 113 is no need to call the 2 first functions listed above, since SystemCoreClock
mbed_official 87:085cde657901 114 variable is updated automatically.
mbed_official 87:085cde657901 115 */
mbed_official 125:23cc3068a9e4 116 uint32_t SystemCoreClock = 84000000; /* [CHANGED FOR MBED] */
mbed_official 87:085cde657901 117 __I uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9};
mbed_official 87:085cde657901 118
mbed_official 87:085cde657901 119 /**
mbed_official 87:085cde657901 120 * @}
mbed_official 87:085cde657901 121 */
mbed_official 87:085cde657901 122
mbed_official 87:085cde657901 123 /** @addtogroup STM32F4xx_System_Private_FunctionPrototypes
mbed_official 87:085cde657901 124 * @{
mbed_official 87:085cde657901 125 */
mbed_official 87:085cde657901 126
mbed_official 125:23cc3068a9e4 127 /* [ADDED FOR MBED] */
mbed_official 125:23cc3068a9e4 128 void SystemClock_Config(void);
mbed_official 125:23cc3068a9e4 129
mbed_official 87:085cde657901 130 /**
mbed_official 87:085cde657901 131 * @}
mbed_official 87:085cde657901 132 */
mbed_official 87:085cde657901 133
mbed_official 87:085cde657901 134 /** @addtogroup STM32F4xx_System_Private_Functions
mbed_official 87:085cde657901 135 * @{
mbed_official 87:085cde657901 136 */
mbed_official 87:085cde657901 137
mbed_official 87:085cde657901 138 /**
mbed_official 87:085cde657901 139 * @brief Setup the microcontroller system
mbed_official 87:085cde657901 140 * Initialize the FPU setting, vector table location and External memory
mbed_official 87:085cde657901 141 * configuration.
mbed_official 87:085cde657901 142 * @param None
mbed_official 87:085cde657901 143 * @retval None
mbed_official 87:085cde657901 144 */
mbed_official 87:085cde657901 145 void SystemInit(void)
mbed_official 87:085cde657901 146 {
mbed_official 87:085cde657901 147 /* FPU settings ------------------------------------------------------------*/
mbed_official 87:085cde657901 148 #if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
mbed_official 87:085cde657901 149 SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */
mbed_official 87:085cde657901 150 #endif
mbed_official 87:085cde657901 151 /* Reset the RCC clock configuration to the default reset state ------------*/
mbed_official 87:085cde657901 152 /* Set HSION bit */
mbed_official 87:085cde657901 153 RCC->CR |= (uint32_t)0x00000001;
mbed_official 87:085cde657901 154
mbed_official 87:085cde657901 155 /* Reset CFGR register */
mbed_official 87:085cde657901 156 RCC->CFGR = 0x00000000;
mbed_official 87:085cde657901 157
mbed_official 87:085cde657901 158 /* Reset HSEON, CSSON and PLLON bits */
mbed_official 87:085cde657901 159 RCC->CR &= (uint32_t)0xFEF6FFFF;
mbed_official 87:085cde657901 160
mbed_official 87:085cde657901 161 /* Reset PLLCFGR register */
mbed_official 87:085cde657901 162 RCC->PLLCFGR = 0x24003010;
mbed_official 87:085cde657901 163
mbed_official 87:085cde657901 164 /* Reset HSEBYP bit */
mbed_official 87:085cde657901 165 RCC->CR &= (uint32_t)0xFFFBFFFF;
mbed_official 87:085cde657901 166
mbed_official 87:085cde657901 167 /* Disable all interrupts */
mbed_official 87:085cde657901 168 RCC->CIR = 0x00000000;
mbed_official 87:085cde657901 169
mbed_official 87:085cde657901 170 /* Configure the Vector Table location add offset address ------------------*/
mbed_official 87:085cde657901 171 #ifdef VECT_TAB_SRAM
mbed_official 87:085cde657901 172 SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
mbed_official 87:085cde657901 173 #else
mbed_official 87:085cde657901 174 SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
mbed_official 87:085cde657901 175 #endif
mbed_official 87:085cde657901 176
mbed_official 125:23cc3068a9e4 177 /* [ADDED FOR MBED] */
mbed_official 87:085cde657901 178 HAL_Init();
mbed_official 125:23cc3068a9e4 179 SystemClock_Config();
mbed_official 87:085cde657901 180 }
mbed_official 87:085cde657901 181
mbed_official 87:085cde657901 182 /**
mbed_official 87:085cde657901 183 * @brief Update SystemCoreClock variable according to Clock Register Values.
mbed_official 87:085cde657901 184 * The SystemCoreClock variable contains the core clock (HCLK), it can
mbed_official 87:085cde657901 185 * be used by the user application to setup the SysTick timer or configure
mbed_official 87:085cde657901 186 * other parameters.
mbed_official 87:085cde657901 187 *
mbed_official 87:085cde657901 188 * @note Each time the core clock (HCLK) changes, this function must be called
mbed_official 87:085cde657901 189 * to update SystemCoreClock variable value. Otherwise, any configuration
mbed_official 87:085cde657901 190 * based on this variable will be incorrect.
mbed_official 87:085cde657901 191 *
mbed_official 87:085cde657901 192 * @note - The system frequency computed by this function is not the real
mbed_official 87:085cde657901 193 * frequency in the chip. It is calculated based on the predefined
mbed_official 87:085cde657901 194 * constant and the selected clock source:
mbed_official 87:085cde657901 195 *
mbed_official 87:085cde657901 196 * - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(*)
mbed_official 87:085cde657901 197 *
mbed_official 87:085cde657901 198 * - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(**)
mbed_official 87:085cde657901 199 *
mbed_official 87:085cde657901 200 * - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(**)
mbed_official 87:085cde657901 201 * or HSI_VALUE(*) multiplied/divided by the PLL factors.
mbed_official 87:085cde657901 202 *
mbed_official 106:ced8cbb51063 203 * (*) HSI_VALUE is a constant defined in stm32f4xx_hal_conf.h file (default value
mbed_official 87:085cde657901 204 * 16 MHz) but the real value may vary depending on the variations
mbed_official 87:085cde657901 205 * in voltage and temperature.
mbed_official 87:085cde657901 206 *
mbed_official 106:ced8cbb51063 207 * (**) HSE_VALUE is a constant defined in stm32f4xx_hal_conf.h file (its value
mbed_official 106:ced8cbb51063 208 * depends on the application requirements), user has to ensure that HSE_VALUE
mbed_official 106:ced8cbb51063 209 * is same as the real frequency of the crystal used. Otherwise, this function
mbed_official 106:ced8cbb51063 210 * may have wrong result.
mbed_official 87:085cde657901 211 *
mbed_official 87:085cde657901 212 * - The result of this function could be not correct when using fractional
mbed_official 87:085cde657901 213 * value for HSE crystal.
mbed_official 87:085cde657901 214 *
mbed_official 87:085cde657901 215 * @param None
mbed_official 87:085cde657901 216 * @retval None
mbed_official 87:085cde657901 217 */
mbed_official 87:085cde657901 218 void SystemCoreClockUpdate(void)
mbed_official 87:085cde657901 219 {
mbed_official 87:085cde657901 220 uint32_t tmp = 0, pllvco = 0, pllp = 2, pllsource = 0, pllm = 2;
mbed_official 87:085cde657901 221
mbed_official 87:085cde657901 222 /* Get SYSCLK source -------------------------------------------------------*/
mbed_official 87:085cde657901 223 tmp = RCC->CFGR & RCC_CFGR_SWS;
mbed_official 87:085cde657901 224
mbed_official 87:085cde657901 225 switch (tmp)
mbed_official 87:085cde657901 226 {
mbed_official 87:085cde657901 227 case 0x00: /* HSI used as system clock source */
mbed_official 87:085cde657901 228 SystemCoreClock = HSI_VALUE;
mbed_official 87:085cde657901 229 break;
mbed_official 87:085cde657901 230 case 0x04: /* HSE used as system clock source */
mbed_official 87:085cde657901 231 SystemCoreClock = HSE_VALUE;
mbed_official 87:085cde657901 232 break;
mbed_official 87:085cde657901 233 case 0x08: /* PLL used as system clock source */
mbed_official 87:085cde657901 234
mbed_official 87:085cde657901 235 /* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLL_M) * PLL_N
mbed_official 87:085cde657901 236 SYSCLK = PLL_VCO / PLL_P
mbed_official 87:085cde657901 237 */
mbed_official 87:085cde657901 238 pllsource = (RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC) >> 22;
mbed_official 87:085cde657901 239 pllm = RCC->PLLCFGR & RCC_PLLCFGR_PLLM;
mbed_official 87:085cde657901 240
mbed_official 87:085cde657901 241 if (pllsource != 0)
mbed_official 87:085cde657901 242 {
mbed_official 87:085cde657901 243 /* HSE used as PLL clock source */
mbed_official 87:085cde657901 244 pllvco = (HSE_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 6);
mbed_official 87:085cde657901 245 }
mbed_official 87:085cde657901 246 else
mbed_official 87:085cde657901 247 {
mbed_official 87:085cde657901 248 /* HSI used as PLL clock source */
mbed_official 87:085cde657901 249 pllvco = (HSI_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 6);
mbed_official 87:085cde657901 250 }
mbed_official 87:085cde657901 251
mbed_official 87:085cde657901 252 pllp = (((RCC->PLLCFGR & RCC_PLLCFGR_PLLP) >>16) + 1 ) *2;
mbed_official 87:085cde657901 253 SystemCoreClock = pllvco/pllp;
mbed_official 87:085cde657901 254 break;
mbed_official 87:085cde657901 255 default:
mbed_official 87:085cde657901 256 SystemCoreClock = HSI_VALUE;
mbed_official 87:085cde657901 257 break;
mbed_official 87:085cde657901 258 }
mbed_official 87:085cde657901 259 /* Compute HCLK frequency --------------------------------------------------*/
mbed_official 87:085cde657901 260 /* Get HCLK prescaler */
mbed_official 87:085cde657901 261 tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)];
mbed_official 87:085cde657901 262 /* HCLK frequency */
mbed_official 87:085cde657901 263 SystemCoreClock >>= tmp;
mbed_official 87:085cde657901 264 }
mbed_official 87:085cde657901 265
mbed_official 125:23cc3068a9e4 266 /* [ADDED FOR MBED]
mbed_official 125:23cc3068a9e4 267 Configure the System clock to 84 MHz (max value) using the internal HSI 16 MHz clock */
mbed_official 125:23cc3068a9e4 268 void SystemClock_Config(void)
mbed_official 125:23cc3068a9e4 269 {
mbed_official 125:23cc3068a9e4 270 RCC_ClkInitTypeDef RCC_ClkInitStruct;
mbed_official 125:23cc3068a9e4 271 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 125:23cc3068a9e4 272
mbed_official 125:23cc3068a9e4 273 /* The voltage scaling allows optimizing the power consumption when the device is
mbed_official 125:23cc3068a9e4 274 clocked below the maximum system frequency, to update the voltage scaling value
mbed_official 125:23cc3068a9e4 275 regarding system frequency refer to product datasheet. */
mbed_official 125:23cc3068a9e4 276 __PWR_CLK_ENABLE();
mbed_official 125:23cc3068a9e4 277 __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);
mbed_official 125:23cc3068a9e4 278
mbed_official 125:23cc3068a9e4 279 /* Enable HSI Oscillator and activate PLL with HSI as source */
mbed_official 125:23cc3068a9e4 280 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
mbed_official 125:23cc3068a9e4 281 RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
mbed_official 125:23cc3068a9e4 282 RCC_OscInitStruct.HSIState = RCC_HSI_ON;
mbed_official 125:23cc3068a9e4 283 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 125:23cc3068a9e4 284 RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
mbed_official 125:23cc3068a9e4 285 RCC_OscInitStruct.HSICalibrationValue = 16;
mbed_official 125:23cc3068a9e4 286 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
mbed_official 125:23cc3068a9e4 287 RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
mbed_official 125:23cc3068a9e4 288 RCC_OscInitStruct.PLL.PLLM = 16;
mbed_official 125:23cc3068a9e4 289 RCC_OscInitStruct.PLL.PLLN = 336;
mbed_official 125:23cc3068a9e4 290 RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
mbed_official 125:23cc3068a9e4 291 RCC_OscInitStruct.PLL.PLLQ = 7;
mbed_official 125:23cc3068a9e4 292 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
mbed_official 125:23cc3068a9e4 293 {
mbed_official 126:549ba18ddd81 294 // System clock initialization failed
mbed_official 126:549ba18ddd81 295 while(1)
mbed_official 126:549ba18ddd81 296 {
mbed_official 126:549ba18ddd81 297 // [TODO] Put something here to tell the user that a problem occured...
mbed_official 126:549ba18ddd81 298 }
mbed_official 125:23cc3068a9e4 299 }
mbed_official 125:23cc3068a9e4 300
mbed_official 125:23cc3068a9e4 301 /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
mbed_official 125:23cc3068a9e4 302 RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
mbed_official 125:23cc3068a9e4 303 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
mbed_official 125:23cc3068a9e4 304 RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 84 MHz
mbed_official 125:23cc3068a9e4 305 RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 42 MHz
mbed_official 125:23cc3068a9e4 306 RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 84 MHz (SPI1 clock...)
mbed_official 125:23cc3068a9e4 307 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
mbed_official 125:23cc3068a9e4 308 {
mbed_official 126:549ba18ddd81 309 // System clock initialization failed
mbed_official 126:549ba18ddd81 310 while(1)
mbed_official 126:549ba18ddd81 311 {
mbed_official 126:549ba18ddd81 312 // [TODO] Put something here to tell the user that a problem occured...
mbed_official 126:549ba18ddd81 313 }
mbed_official 125:23cc3068a9e4 314 }
mbed_official 125:23cc3068a9e4 315
mbed_official 125:23cc3068a9e4 316 /* Update the SystemCoreClock variable
mbed_official 125:23cc3068a9e4 317 - Not needed because the variable is already set on top of this file.
mbed_official 125:23cc3068a9e4 318 - Warning: this function call is removed by the compiler with -O3/-Otime options. */
mbed_official 125:23cc3068a9e4 319 //SystemCoreClockUpdate();
mbed_official 125:23cc3068a9e4 320
mbed_official 125:23cc3068a9e4 321 /* Output SYSCLK on MCO2 pin(PC9) for debugging purpose */
mbed_official 125:23cc3068a9e4 322 //HAL_RCC_MCOConfig(RCC_MCO2, RCC_MCO2SOURCE_SYSCLK, RCC_MCODIV_4); // 84 MHz / 4 = 21 MHz
mbed_official 125:23cc3068a9e4 323 }
mbed_official 125:23cc3068a9e4 324
mbed_official 125:23cc3068a9e4 325 /* [ADDED FOR MBED]
mbed_official 125:23cc3068a9e4 326 Used for the different timeouts in the HAL */
mbed_official 125:23cc3068a9e4 327 void SysTick_Handler(void)
mbed_official 125:23cc3068a9e4 328 {
mbed_official 125:23cc3068a9e4 329 HAL_IncTick();
mbed_official 125:23cc3068a9e4 330 }
mbed_official 125:23cc3068a9e4 331
mbed_official 87:085cde657901 332 /**
mbed_official 87:085cde657901 333 * @}
mbed_official 87:085cde657901 334 */
mbed_official 87:085cde657901 335
mbed_official 87:085cde657901 336 /**
mbed_official 87:085cde657901 337 * @}
mbed_official 87:085cde657901 338 */
mbed_official 87:085cde657901 339
mbed_official 87:085cde657901 340 /**
mbed_official 87:085cde657901 341 * @}
mbed_official 87:085cde657901 342 */
mbed_official 87:085cde657901 343 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/