Abdessamad El Abbassi / mbed-src-temp

mbed library sources

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targets/cmsis/TARGET_STM/TARGET_NUCLEO_F401RE/system_stm32f4xx.c@163:c15717b680e9, 2014-04-20 (annotated)

Committer:
abdess
Date:
Sun Apr 20 19:20:08 2014 +0000
Revision:
163:c15717b680e9
Parent:
162:1fb772918dd0 
.

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...
abdess 162:1fb772918dd0 298 printf("System clock initialization failed");
mbed_official 126:549ba18ddd81 299 }
mbed_official 125:23cc3068a9e4 300 }
mbed_official 125:23cc3068a9e4 301
mbed_official 125:23cc3068a9e4 302 /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
mbed_official 125:23cc3068a9e4 303 RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
mbed_official 125:23cc3068a9e4 304 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
mbed_official 125:23cc3068a9e4 305 RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 84 MHz
mbed_official 125:23cc3068a9e4 306 RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; // 42 MHz
mbed_official 125:23cc3068a9e4 307 RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 84 MHz (SPI1 clock...)
mbed_official 125:23cc3068a9e4 308 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
mbed_official 125:23cc3068a9e4 309 {
mbed_official 126:549ba18ddd81 310 // System clock initialization failed
mbed_official 126:549ba18ddd81 311 while(1)
mbed_official 126:549ba18ddd81 312 {
mbed_official 126:549ba18ddd81 313 // [TODO] Put something here to tell the user that a problem occured...
abdess 162:1fb772918dd0 314 printf("System clock initialization failed");
mbed_official 126:549ba18ddd81 315 }
mbed_official 125:23cc3068a9e4 316 }
mbed_official 125:23cc3068a9e4 317
mbed_official 125:23cc3068a9e4 318 /* Update the SystemCoreClock variable
mbed_official 125:23cc3068a9e4 319 - Not needed because the variable is already set on top of this file.
mbed_official 125:23cc3068a9e4 320 - Warning: this function call is removed by the compiler with -O3/-Otime options. */
mbed_official 125:23cc3068a9e4 321 //SystemCoreClockUpdate();
mbed_official 125:23cc3068a9e4 322
mbed_official 125:23cc3068a9e4 323 /* Output SYSCLK on MCO2 pin(PC9) for debugging purpose */
mbed_official 125:23cc3068a9e4 324 //HAL_RCC_MCOConfig(RCC_MCO2, RCC_MCO2SOURCE_SYSCLK, RCC_MCODIV_4); // 84 MHz / 4 = 21 MHz
mbed_official 125:23cc3068a9e4 325 }
mbed_official 125:23cc3068a9e4 326
abdess 161:cb07f9f831b7 327
abdess 163:c15717b680e9 328
mbed_official 125:23cc3068a9e4 329 /* [ADDED FOR MBED]
abdess 163:c15717b680e9 330 Used for the different timeouts in the HAL
mbed_official 125:23cc3068a9e4 331 void SysTick_Handler(void)
mbed_official 125:23cc3068a9e4 332 {
mbed_official 125:23cc3068a9e4 333 HAL_IncTick();
mbed_official 125:23cc3068a9e4 334 }
abdess 163:c15717b680e9 335 */
mbed_official 125:23cc3068a9e4 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 */
mbed_official 87:085cde657901 344
mbed_official 87:085cde657901 345 /**
mbed_official 87:085cde657901 346 * @}
mbed_official 87:085cde657901 347 */
mbed_official 87:085cde657901 348 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/