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Mbed for VNG board

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targets/cmsis/TARGET_STM/TARGET_STM32L1/TARGET_NUCLEO_L152RE/system_stm32l1xx.c@394:83f921546702, 2014-11-07 (annotated)

Committer:
mbed_official
Date:
Fri Nov 07 15:45:07 2014 +0000
Revision:
394:83f921546702
Parent:
targets/cmsis/TARGET_STM/TARGET_NUCLEO_L152RE/system_stm32l1xx.c@354:e67efb2aab0e 
Synchronized with git revision aab52cb7ec5a665869e507dd988bbfd55b7e087e



Full URL: https://github.com/mbedmicro/mbed/commit/aab52cb7ec5a665869e507dd988bbfd55b7e087e/



Tests: Fix cpputest testrunner

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 76:aeb1df146756 1 /**
mbed_official 76:aeb1df146756 2 ******************************************************************************
mbed_official 76:aeb1df146756 3 * @file system_stm32l1xx.c
mbed_official 76:aeb1df146756 4 * @author MCD Application Team
mbed_official 354:e67efb2aab0e 5 * @version V2.0.0
mbed_official 354:e67efb2aab0e 6 * @date 5-September-2014
mbed_official 76:aeb1df146756 7 * @brief CMSIS Cortex-M3 Device Peripheral Access Layer System Source File.
mbed_official 354:e67efb2aab0e 8 *
mbed_official 354:e67efb2aab0e 9 * This file provides two functions and one global variable to be called from
mbed_official 354:e67efb2aab0e 10 * user application:
mbed_official 354:e67efb2aab0e 11 * - SystemInit(): This function is called at startup just after reset and
mbed_official 76:aeb1df146756 12 * before branch to main program. This call is made inside
mbed_official 354:e67efb2aab0e 13 * the "startup_stm32l1xx.s" file.
mbed_official 354:e67efb2aab0e 14 *
mbed_official 76:aeb1df146756 15 * - SystemCoreClock variable: Contains the core clock (HCLK), it can be used
mbed_official 76:aeb1df146756 16 * by the user application to setup the SysTick
mbed_official 76:aeb1df146756 17 * timer or configure other parameters.
mbed_official 76:aeb1df146756 18 *
mbed_official 76:aeb1df146756 19 * - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must
mbed_official 76:aeb1df146756 20 * be called whenever the core clock is changed
mbed_official 354:e67efb2aab0e 21 * during program execution.
mbed_official 139:e3413eddde57 22 *
mbed_official 354:e67efb2aab0e 23 * This file configures the system clock as follows:
mbed_official 139:e3413eddde57 24 *-----------------------------------------------------------------------------
mbed_official 139:e3413eddde57 25 * System clock source | 1- PLL_HSE_EXTC | 3- PLL_HSI
mbed_official 139:e3413eddde57 26 * | (external 8 MHz clock) | (internal 16 MHz)
mbed_official 139:e3413eddde57 27 * | 2- PLL_HSE_XTAL |
mbed_official 139:e3413eddde57 28 * | (external 8 MHz xtal) |
mbed_official 139:e3413eddde57 29 *-----------------------------------------------------------------------------
mbed_official 139:e3413eddde57 30 * SYSCLK(MHz) | 24 | 32
mbed_official 139:e3413eddde57 31 *-----------------------------------------------------------------------------
mbed_official 139:e3413eddde57 32 * AHBCLK (MHz) | 24 | 32
mbed_official 139:e3413eddde57 33 *-----------------------------------------------------------------------------
mbed_official 139:e3413eddde57 34 * APB1CLK (MHz) | 24 | 32
mbed_official 139:e3413eddde57 35 *-----------------------------------------------------------------------------
mbed_official 139:e3413eddde57 36 * APB2CLK (MHz) | 24 | 32
mbed_official 139:e3413eddde57 37 *-----------------------------------------------------------------------------
mbed_official 139:e3413eddde57 38 * USB capable (48 MHz precise clock) | YES | NO
mbed_official 354:e67efb2aab0e 39 *-----------------------------------------------------------------------------
mbed_official 139:e3413eddde57 40 ******************************************************************************
mbed_official 76:aeb1df146756 41 * @attention
mbed_official 76:aeb1df146756 42 *
mbed_official 106:ced8cbb51063 43 * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
mbed_official 76:aeb1df146756 44 *
mbed_official 106:ced8cbb51063 45 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 106:ced8cbb51063 46 * are permitted provided that the following conditions are met:
mbed_official 106:ced8cbb51063 47 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 106:ced8cbb51063 48 * this list of conditions and the following disclaimer.
mbed_official 106:ced8cbb51063 49 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 106:ced8cbb51063 50 * this list of conditions and the following disclaimer in the documentation
mbed_official 106:ced8cbb51063 51 * and/or other materials provided with the distribution.
mbed_official 106:ced8cbb51063 52 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 106:ced8cbb51063 53 * may be used to endorse or promote products derived from this software
mbed_official 106:ced8cbb51063 54 * without specific prior written permission.
mbed_official 76:aeb1df146756 55 *
mbed_official 106:ced8cbb51063 56 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 106:ced8cbb51063 57 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 106:ced8cbb51063 58 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 106:ced8cbb51063 59 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 106:ced8cbb51063 60 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 106:ced8cbb51063 61 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 106:ced8cbb51063 62 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 106:ced8cbb51063 63 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 106:ced8cbb51063 64 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 106:ced8cbb51063 65 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 76:aeb1df146756 66 *
mbed_official 76:aeb1df146756 67 ******************************************************************************
mbed_official 76:aeb1df146756 68 */
mbed_official 76:aeb1df146756 69
mbed_official 76:aeb1df146756 70 /** @addtogroup CMSIS
mbed_official 76:aeb1df146756 71 * @{
mbed_official 76:aeb1df146756 72 */
mbed_official 76:aeb1df146756 73
mbed_official 76:aeb1df146756 74 /** @addtogroup stm32l1xx_system
mbed_official 76:aeb1df146756 75 * @{
mbed_official 76:aeb1df146756 76 */
mbed_official 76:aeb1df146756 77
mbed_official 76:aeb1df146756 78 /** @addtogroup STM32L1xx_System_Private_Includes
mbed_official 76:aeb1df146756 79 * @{
mbed_official 76:aeb1df146756 80 */
mbed_official 76:aeb1df146756 81
mbed_official 76:aeb1df146756 82 #include "stm32l1xx.h"
mbed_official 354:e67efb2aab0e 83 #include "hal_tick.h"
mbed_official 76:aeb1df146756 84
mbed_official 76:aeb1df146756 85 /**
mbed_official 76:aeb1df146756 86 * @}
mbed_official 76:aeb1df146756 87 */
mbed_official 76:aeb1df146756 88
mbed_official 76:aeb1df146756 89 /** @addtogroup STM32L1xx_System_Private_TypesDefinitions
mbed_official 76:aeb1df146756 90 * @{
mbed_official 76:aeb1df146756 91 */
mbed_official 76:aeb1df146756 92
mbed_official 76:aeb1df146756 93 /**
mbed_official 76:aeb1df146756 94 * @}
mbed_official 76:aeb1df146756 95 */
mbed_official 76:aeb1df146756 96
mbed_official 76:aeb1df146756 97 /** @addtogroup STM32L1xx_System_Private_Defines
mbed_official 76:aeb1df146756 98 * @{
mbed_official 76:aeb1df146756 99 */
mbed_official 354:e67efb2aab0e 100 #if !defined (HSE_VALUE)
mbed_official 354:e67efb2aab0e 101 #define HSE_VALUE ((uint32_t)8000000) /*!< Default value of the External oscillator in Hz.
mbed_official 354:e67efb2aab0e 102 This value can be provided and adapted by the user application. */
mbed_official 354:e67efb2aab0e 103 #endif /* HSE_VALUE */
mbed_official 76:aeb1df146756 104
mbed_official 354:e67efb2aab0e 105 #if !defined (HSI_VALUE)
mbed_official 354:e67efb2aab0e 106 #define HSI_VALUE ((uint32_t)16000000) /*!< Default value of the Internal oscillator in Hz.
mbed_official 354:e67efb2aab0e 107 This value can be provided and adapted by the user application. */
mbed_official 354:e67efb2aab0e 108 #endif /* HSI_VALUE */
mbed_official 354:e67efb2aab0e 109
mbed_official 354:e67efb2aab0e 110 /*!< Uncomment the following line if you need to use external SRAM mounted
mbed_official 354:e67efb2aab0e 111 on STM32L152D_EVAL board as data memory */
mbed_official 354:e67efb2aab0e 112 /* #define DATA_IN_ExtSRAM */
mbed_official 354:e67efb2aab0e 113
mbed_official 76:aeb1df146756 114 /*!< Uncomment the following line if you need to relocate your vector Table in
mbed_official 76:aeb1df146756 115 Internal SRAM. */
mbed_official 76:aeb1df146756 116 /* #define VECT_TAB_SRAM */
mbed_official 76:aeb1df146756 117 #define VECT_TAB_OFFSET 0x0 /*!< Vector Table base offset field.
mbed_official 76:aeb1df146756 118 This value must be a multiple of 0x200. */
mbed_official 76:aeb1df146756 119 /**
mbed_official 76:aeb1df146756 120 * @}
mbed_official 76:aeb1df146756 121 */
mbed_official 76:aeb1df146756 122
mbed_official 76:aeb1df146756 123 /** @addtogroup STM32L1xx_System_Private_Macros
mbed_official 76:aeb1df146756 124 * @{
mbed_official 76:aeb1df146756 125 */
mbed_official 76:aeb1df146756 126
mbed_official 139:e3413eddde57 127 /* Select the clock sources (other than HSI) to start with (0=OFF, 1=ON) */
mbed_official 139:e3413eddde57 128 #define USE_PLL_HSE_EXTC (1) /* Use external clock */
mbed_official 139:e3413eddde57 129 #define USE_PLL_HSE_XTAL (1) /* Use external xtal */
mbed_official 139:e3413eddde57 130
mbed_official 76:aeb1df146756 131 /**
mbed_official 76:aeb1df146756 132 * @}
mbed_official 76:aeb1df146756 133 */
mbed_official 76:aeb1df146756 134
mbed_official 76:aeb1df146756 135 /** @addtogroup STM32L1xx_System_Private_Variables
mbed_official 76:aeb1df146756 136 * @{
mbed_official 76:aeb1df146756 137 */
mbed_official 354:e67efb2aab0e 138 /* This variable is updated in three ways:
mbed_official 354:e67efb2aab0e 139 1) by calling CMSIS function SystemCoreClockUpdate()
mbed_official 354:e67efb2aab0e 140 2) by calling HAL API function HAL_RCC_GetHCLKFreq()
mbed_official 354:e67efb2aab0e 141 3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
mbed_official 354:e67efb2aab0e 142 Note: If you use this function to configure the system clock; then there
mbed_official 354:e67efb2aab0e 143 is no need to call the 2 first functions listed above, since SystemCoreClock
mbed_official 354:e67efb2aab0e 144 variable is updated automatically.
mbed_official 354:e67efb2aab0e 145 */
mbed_official 139:e3413eddde57 146 uint32_t SystemCoreClock = 32000000; /* Default with HSI. Will be updated if HSE is used */
mbed_official 354:e67efb2aab0e 147 const uint8_t PLLMulTable[9] = {3, 4, 6, 8, 12, 16, 24, 32, 48};
mbed_official 354:e67efb2aab0e 148 const uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9};
mbed_official 76:aeb1df146756 149
mbed_official 76:aeb1df146756 150 /**
mbed_official 76:aeb1df146756 151 * @}
mbed_official 76:aeb1df146756 152 */
mbed_official 76:aeb1df146756 153
mbed_official 76:aeb1df146756 154 /** @addtogroup STM32L1xx_System_Private_FunctionPrototypes
mbed_official 76:aeb1df146756 155 * @{
mbed_official 76:aeb1df146756 156 */
mbed_official 76:aeb1df146756 157
mbed_official 354:e67efb2aab0e 158 #if defined (STM32L151xD) || defined (STM32L152xD) || defined (STM32L162xD)
mbed_official 354:e67efb2aab0e 159 #ifdef DATA_IN_ExtSRAM
mbed_official 354:e67efb2aab0e 160 static void SystemInit_ExtMemCtl(void);
mbed_official 354:e67efb2aab0e 161 #endif /* DATA_IN_ExtSRAM */
mbed_official 354:e67efb2aab0e 162 #endif /* STM32L151xD || STM32L152xD || STM32L162xD */
mbed_official 76:aeb1df146756 163
mbed_official 139:e3413eddde57 164 #if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
mbed_official 139:e3413eddde57 165 uint8_t SetSysClock_PLL_HSE(uint8_t bypass);
mbed_official 139:e3413eddde57 166 #endif
mbed_official 139:e3413eddde57 167
mbed_official 139:e3413eddde57 168 uint8_t SetSysClock_PLL_HSI(void);
mbed_official 139:e3413eddde57 169
mbed_official 76:aeb1df146756 170 /**
mbed_official 76:aeb1df146756 171 * @}
mbed_official 76:aeb1df146756 172 */
mbed_official 76:aeb1df146756 173
mbed_official 76:aeb1df146756 174 /** @addtogroup STM32L1xx_System_Private_Functions
mbed_official 76:aeb1df146756 175 * @{
mbed_official 76:aeb1df146756 176 */
mbed_official 76:aeb1df146756 177
mbed_official 76:aeb1df146756 178 /**
mbed_official 76:aeb1df146756 179 * @brief Setup the microcontroller system.
mbed_official 76:aeb1df146756 180 * Initialize the Embedded Flash Interface, the PLL and update the
mbed_official 76:aeb1df146756 181 * SystemCoreClock variable.
mbed_official 76:aeb1df146756 182 * @param None
mbed_official 76:aeb1df146756 183 * @retval None
mbed_official 76:aeb1df146756 184 */
mbed_official 76:aeb1df146756 185 void SystemInit (void)
mbed_official 76:aeb1df146756 186 {
mbed_official 76:aeb1df146756 187 /*!< Set MSION bit */
mbed_official 76:aeb1df146756 188 RCC->CR |= (uint32_t)0x00000100;
mbed_official 76:aeb1df146756 189
mbed_official 76:aeb1df146756 190 /*!< Reset SW[1:0], HPRE[3:0], PPRE1[2:0], PPRE2[2:0], MCOSEL[2:0] and MCOPRE[2:0] bits */
mbed_official 76:aeb1df146756 191 RCC->CFGR &= (uint32_t)0x88FFC00C;
mbed_official 76:aeb1df146756 192
mbed_official 76:aeb1df146756 193 /*!< Reset HSION, HSEON, CSSON and PLLON bits */
mbed_official 76:aeb1df146756 194 RCC->CR &= (uint32_t)0xEEFEFFFE;
mbed_official 76:aeb1df146756 195
mbed_official 76:aeb1df146756 196 /*!< Reset HSEBYP bit */
mbed_official 76:aeb1df146756 197 RCC->CR &= (uint32_t)0xFFFBFFFF;
mbed_official 76:aeb1df146756 198
mbed_official 76:aeb1df146756 199 /*!< Reset PLLSRC, PLLMUL[3:0] and PLLDIV[1:0] bits */
mbed_official 76:aeb1df146756 200 RCC->CFGR &= (uint32_t)0xFF02FFFF;
mbed_official 76:aeb1df146756 201
mbed_official 76:aeb1df146756 202 /*!< Disable all interrupts */
mbed_official 76:aeb1df146756 203 RCC->CIR = 0x00000000;
mbed_official 76:aeb1df146756 204
mbed_official 354:e67efb2aab0e 205 #ifdef DATA_IN_ExtSRAM
mbed_official 354:e67efb2aab0e 206 SystemInit_ExtMemCtl();
mbed_official 354:e67efb2aab0e 207 #endif /* DATA_IN_ExtSRAM */
mbed_official 354:e67efb2aab0e 208
mbed_official 354:e67efb2aab0e 209 #ifdef VECT_TAB_SRAM
mbed_official 354:e67efb2aab0e 210 SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM. */
mbed_official 354:e67efb2aab0e 211 #else
mbed_official 354:e67efb2aab0e 212 SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH. */
mbed_official 354:e67efb2aab0e 213 #endif
mbed_official 354:e67efb2aab0e 214
mbed_official 354:e67efb2aab0e 215 /* Configure the Cube driver */
mbed_official 354:e67efb2aab0e 216 SystemCoreClock = 16000000; // At this stage the HSI is used as system clock
mbed_official 354:e67efb2aab0e 217 HAL_Init();
mbed_official 354:e67efb2aab0e 218
mbed_official 354:e67efb2aab0e 219 /* Configure the System clock source, PLL Multiplier and Divider factors,
mbed_official 139:e3413eddde57 220 AHB/APBx prescalers and Flash settings */
mbed_official 76:aeb1df146756 221 SetSysClock();
mbed_official 354:e67efb2aab0e 222
mbed_official 354:e67efb2aab0e 223 /* Reset the timer to avoid issues after the RAM initialization */
mbed_official 354:e67efb2aab0e 224 TIM_MST_RESET_ON;
mbed_official 354:e67efb2aab0e 225 TIM_MST_RESET_OFF;
mbed_official 76:aeb1df146756 226 }
mbed_official 76:aeb1df146756 227
mbed_official 76:aeb1df146756 228 /**
mbed_official 354:e67efb2aab0e 229 * @brief Update SystemCoreClock according to Clock Register Values
mbed_official 76:aeb1df146756 230 * The SystemCoreClock variable contains the core clock (HCLK), it can
mbed_official 76:aeb1df146756 231 * be used by the user application to setup the SysTick timer or configure
mbed_official 76:aeb1df146756 232 * other parameters.
mbed_official 76:aeb1df146756 233 *
mbed_official 76:aeb1df146756 234 * @note Each time the core clock (HCLK) changes, this function must be called
mbed_official 76:aeb1df146756 235 * to update SystemCoreClock variable value. Otherwise, any configuration
mbed_official 76:aeb1df146756 236 * based on this variable will be incorrect.
mbed_official 76:aeb1df146756 237 *
mbed_official 76:aeb1df146756 238 * @note - The system frequency computed by this function is not the real
mbed_official 76:aeb1df146756 239 * frequency in the chip. It is calculated based on the predefined
mbed_official 76:aeb1df146756 240 * constant and the selected clock source:
mbed_official 76:aeb1df146756 241 *
mbed_official 76:aeb1df146756 242 * - If SYSCLK source is MSI, SystemCoreClock will contain the MSI
mbed_official 76:aeb1df146756 243 * value as defined by the MSI range.
mbed_official 76:aeb1df146756 244 *
mbed_official 76:aeb1df146756 245 * - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(*)
mbed_official 76:aeb1df146756 246 *
mbed_official 76:aeb1df146756 247 * - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(**)
mbed_official 76:aeb1df146756 248 *
mbed_official 354:e67efb2aab0e 249 * - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(**)
mbed_official 76:aeb1df146756 250 * or HSI_VALUE(*) multiplied/divided by the PLL factors.
mbed_official 76:aeb1df146756 251 *
mbed_official 76:aeb1df146756 252 * (*) HSI_VALUE is a constant defined in stm32l1xx.h file (default value
mbed_official 76:aeb1df146756 253 * 16 MHz) but the real value may vary depending on the variations
mbed_official 76:aeb1df146756 254 * in voltage and temperature.
mbed_official 76:aeb1df146756 255 *
mbed_official 76:aeb1df146756 256 * (**) HSE_VALUE is a constant defined in stm32l1xx.h file (default value
mbed_official 76:aeb1df146756 257 * 8 MHz), user has to ensure that HSE_VALUE is same as the real
mbed_official 76:aeb1df146756 258 * frequency of the crystal used. Otherwise, this function may
mbed_official 76:aeb1df146756 259 * have wrong result.
mbed_official 76:aeb1df146756 260 *
mbed_official 76:aeb1df146756 261 * - The result of this function could be not correct when using fractional
mbed_official 354:e67efb2aab0e 262 * value for HSE crystal.
mbed_official 76:aeb1df146756 263 * @param None
mbed_official 76:aeb1df146756 264 * @retval None
mbed_official 76:aeb1df146756 265 */
mbed_official 76:aeb1df146756 266 void SystemCoreClockUpdate (void)
mbed_official 76:aeb1df146756 267 {
mbed_official 76:aeb1df146756 268 uint32_t tmp = 0, pllmul = 0, plldiv = 0, pllsource = 0, msirange = 0;
mbed_official 76:aeb1df146756 269
mbed_official 76:aeb1df146756 270 /* Get SYSCLK source -------------------------------------------------------*/
mbed_official 76:aeb1df146756 271 tmp = RCC->CFGR & RCC_CFGR_SWS;
mbed_official 76:aeb1df146756 272
mbed_official 76:aeb1df146756 273 switch (tmp)
mbed_official 76:aeb1df146756 274 {
mbed_official 76:aeb1df146756 275 case 0x00: /* MSI used as system clock */
mbed_official 76:aeb1df146756 276 msirange = (RCC->ICSCR & RCC_ICSCR_MSIRANGE) >> 13;
mbed_official 76:aeb1df146756 277 SystemCoreClock = (32768 * (1 << (msirange + 1)));
mbed_official 76:aeb1df146756 278 break;
mbed_official 76:aeb1df146756 279 case 0x04: /* HSI used as system clock */
mbed_official 76:aeb1df146756 280 SystemCoreClock = HSI_VALUE;
mbed_official 76:aeb1df146756 281 break;
mbed_official 76:aeb1df146756 282 case 0x08: /* HSE used as system clock */
mbed_official 76:aeb1df146756 283 SystemCoreClock = HSE_VALUE;
mbed_official 76:aeb1df146756 284 break;
mbed_official 76:aeb1df146756 285 case 0x0C: /* PLL used as system clock */
mbed_official 76:aeb1df146756 286 /* Get PLL clock source and multiplication factor ----------------------*/
mbed_official 76:aeb1df146756 287 pllmul = RCC->CFGR & RCC_CFGR_PLLMUL;
mbed_official 76:aeb1df146756 288 plldiv = RCC->CFGR & RCC_CFGR_PLLDIV;
mbed_official 76:aeb1df146756 289 pllmul = PLLMulTable[(pllmul >> 18)];
mbed_official 76:aeb1df146756 290 plldiv = (plldiv >> 22) + 1;
mbed_official 76:aeb1df146756 291
mbed_official 76:aeb1df146756 292 pllsource = RCC->CFGR & RCC_CFGR_PLLSRC;
mbed_official 76:aeb1df146756 293
mbed_official 76:aeb1df146756 294 if (pllsource == 0x00)
mbed_official 76:aeb1df146756 295 {
mbed_official 76:aeb1df146756 296 /* HSI oscillator clock selected as PLL clock entry */
mbed_official 76:aeb1df146756 297 SystemCoreClock = (((HSI_VALUE) * pllmul) / plldiv);
mbed_official 76:aeb1df146756 298 }
mbed_official 76:aeb1df146756 299 else
mbed_official 76:aeb1df146756 300 {
mbed_official 76:aeb1df146756 301 /* HSE selected as PLL clock entry */
mbed_official 76:aeb1df146756 302 SystemCoreClock = (((HSE_VALUE) * pllmul) / plldiv);
mbed_official 76:aeb1df146756 303 }
mbed_official 76:aeb1df146756 304 break;
mbed_official 76:aeb1df146756 305 default: /* MSI used as system clock */
mbed_official 76:aeb1df146756 306 msirange = (RCC->ICSCR & RCC_ICSCR_MSIRANGE) >> 13;
mbed_official 76:aeb1df146756 307 SystemCoreClock = (32768 * (1 << (msirange + 1)));
mbed_official 76:aeb1df146756 308 break;
mbed_official 76:aeb1df146756 309 }
mbed_official 76:aeb1df146756 310 /* Compute HCLK clock frequency --------------------------------------------*/
mbed_official 76:aeb1df146756 311 /* Get HCLK prescaler */
mbed_official 76:aeb1df146756 312 tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)];
mbed_official 76:aeb1df146756 313 /* HCLK clock frequency */
mbed_official 76:aeb1df146756 314 SystemCoreClock >>= tmp;
mbed_official 76:aeb1df146756 315 }
mbed_official 76:aeb1df146756 316
mbed_official 354:e67efb2aab0e 317 #if defined (STM32L151xD) || defined (STM32L152xD) || defined (STM32L162xD)
mbed_official 354:e67efb2aab0e 318 #ifdef DATA_IN_ExtSRAM
mbed_official 354:e67efb2aab0e 319 /**
mbed_official 354:e67efb2aab0e 320 * @brief Setup the external memory controller.
mbed_official 354:e67efb2aab0e 321 * Called in SystemInit() function before jump to main.
mbed_official 354:e67efb2aab0e 322 * This function configures the external SRAM mounted on STM32L152D_EVAL board
mbed_official 354:e67efb2aab0e 323 * This SRAM will be used as program data memory (including heap and stack).
mbed_official 354:e67efb2aab0e 324 * @param None
mbed_official 354:e67efb2aab0e 325 * @retval None
mbed_official 354:e67efb2aab0e 326 */
mbed_official 354:e67efb2aab0e 327 void SystemInit_ExtMemCtl(void)
mbed_official 354:e67efb2aab0e 328 {
mbed_official 354:e67efb2aab0e 329 /*-- GPIOs Configuration -----------------------------------------------------*/
mbed_official 354:e67efb2aab0e 330 /*
mbed_official 354:e67efb2aab0e 331 +-------------------+--------------------+------------------+------------------+
mbed_official 354:e67efb2aab0e 332 + SRAM pins assignment +
mbed_official 354:e67efb2aab0e 333 +-------------------+--------------------+------------------+------------------+
mbed_official 354:e67efb2aab0e 334 | PD0 <-> FSMC_D2 | PE0 <-> FSMC_NBL0 | PF0 <-> FSMC_A0 | PG0 <-> FSMC_A10 |
mbed_official 354:e67efb2aab0e 335 | PD1 <-> FSMC_D3 | PE1 <-> FSMC_NBL1 | PF1 <-> FSMC_A1 | PG1 <-> FSMC_A11 |
mbed_official 354:e67efb2aab0e 336 | PD4 <-> FSMC_NOE | PE7 <-> FSMC_D4 | PF2 <-> FSMC_A2 | PG2 <-> FSMC_A12 |
mbed_official 354:e67efb2aab0e 337 | PD5 <-> FSMC_NWE | PE8 <-> FSMC_D5 | PF3 <-> FSMC_A3 | PG3 <-> FSMC_A13 |
mbed_official 354:e67efb2aab0e 338 | PD8 <-> FSMC_D13 | PE9 <-> FSMC_D6 | PF4 <-> FSMC_A4 | PG4 <-> FSMC_A14 |
mbed_official 354:e67efb2aab0e 339 | PD9 <-> FSMC_D14 | PE10 <-> FSMC_D7 | PF5 <-> FSMC_A5 | PG5 <-> FSMC_A15 |
mbed_official 354:e67efb2aab0e 340 | PD10 <-> FSMC_D15 | PE11 <-> FSMC_D8 | PF12 <-> FSMC_A6 | PG10<-> FSMC_NE2 |
mbed_official 354:e67efb2aab0e 341 | PD11 <-> FSMC_A16 | PE12 <-> FSMC_D9 | PF13 <-> FSMC_A7 |------------------+
mbed_official 354:e67efb2aab0e 342 | PD12 <-> FSMC_A17 | PE13 <-> FSMC_D10 | PF14 <-> FSMC_A8 |
mbed_official 354:e67efb2aab0e 343 | PD13 <-> FSMC_A18 | PE14 <-> FSMC_D11 | PF15 <-> FSMC_A9 |
mbed_official 354:e67efb2aab0e 344 | PD14 <-> FSMC_D0 | PE15 <-> FSMC_D12 |------------------+
mbed_official 354:e67efb2aab0e 345 | PD15 <-> FSMC_D1 |--------------------+
mbed_official 354:e67efb2aab0e 346 +-------------------+
mbed_official 354:e67efb2aab0e 347 */
mbed_official 354:e67efb2aab0e 348
mbed_official 354:e67efb2aab0e 349 /* Enable GPIOD, GPIOE, GPIOF and GPIOG interface clock */
mbed_official 354:e67efb2aab0e 350 RCC->AHBENR = 0x000080D8;
mbed_official 354:e67efb2aab0e 351
mbed_official 354:e67efb2aab0e 352 /* Connect PDx pins to FSMC Alternate function */
mbed_official 354:e67efb2aab0e 353 GPIOD->AFR[0] = 0x00CC00CC;
mbed_official 354:e67efb2aab0e 354 GPIOD->AFR[1] = 0xCCCCCCCC;
mbed_official 354:e67efb2aab0e 355 /* Configure PDx pins in Alternate function mode */
mbed_official 354:e67efb2aab0e 356 GPIOD->MODER = 0xAAAA0A0A;
mbed_official 354:e67efb2aab0e 357 /* Configure PDx pins speed to 40 MHz */
mbed_official 354:e67efb2aab0e 358 GPIOD->OSPEEDR = 0xFFFF0F0F;
mbed_official 354:e67efb2aab0e 359 /* Configure PDx pins Output type to push-pull */
mbed_official 354:e67efb2aab0e 360 GPIOD->OTYPER = 0x00000000;
mbed_official 354:e67efb2aab0e 361 /* No pull-up, pull-down for PDx pins */
mbed_official 354:e67efb2aab0e 362 GPIOD->PUPDR = 0x00000000;
mbed_official 354:e67efb2aab0e 363
mbed_official 354:e67efb2aab0e 364 /* Connect PEx pins to FSMC Alternate function */
mbed_official 354:e67efb2aab0e 365 GPIOE->AFR[0] = 0xC00000CC;
mbed_official 354:e67efb2aab0e 366 GPIOE->AFR[1] = 0xCCCCCCCC;
mbed_official 354:e67efb2aab0e 367 /* Configure PEx pins in Alternate function mode */
mbed_official 354:e67efb2aab0e 368 GPIOE->MODER = 0xAAAA800A;
mbed_official 354:e67efb2aab0e 369 /* Configure PEx pins speed to 40 MHz */
mbed_official 354:e67efb2aab0e 370 GPIOE->OSPEEDR = 0xFFFFC00F;
mbed_official 354:e67efb2aab0e 371 /* Configure PEx pins Output type to push-pull */
mbed_official 354:e67efb2aab0e 372 GPIOE->OTYPER = 0x00000000;
mbed_official 354:e67efb2aab0e 373 /* No pull-up, pull-down for PEx pins */
mbed_official 354:e67efb2aab0e 374 GPIOE->PUPDR = 0x00000000;
mbed_official 354:e67efb2aab0e 375
mbed_official 354:e67efb2aab0e 376 /* Connect PFx pins to FSMC Alternate function */
mbed_official 354:e67efb2aab0e 377 GPIOF->AFR[0] = 0x00CCCCCC;
mbed_official 354:e67efb2aab0e 378 GPIOF->AFR[1] = 0xCCCC0000;
mbed_official 354:e67efb2aab0e 379 /* Configure PFx pins in Alternate function mode */
mbed_official 354:e67efb2aab0e 380 GPIOF->MODER = 0xAA000AAA;
mbed_official 354:e67efb2aab0e 381 /* Configure PFx pins speed to 40 MHz */
mbed_official 354:e67efb2aab0e 382 GPIOF->OSPEEDR = 0xFF000FFF;
mbed_official 354:e67efb2aab0e 383 /* Configure PFx pins Output type to push-pull */
mbed_official 354:e67efb2aab0e 384 GPIOF->OTYPER = 0x00000000;
mbed_official 354:e67efb2aab0e 385 /* No pull-up, pull-down for PFx pins */
mbed_official 354:e67efb2aab0e 386 GPIOF->PUPDR = 0x00000000;
mbed_official 354:e67efb2aab0e 387
mbed_official 354:e67efb2aab0e 388 /* Connect PGx pins to FSMC Alternate function */
mbed_official 354:e67efb2aab0e 389 GPIOG->AFR[0] = 0x00CCCCCC;
mbed_official 354:e67efb2aab0e 390 GPIOG->AFR[1] = 0x00000C00;
mbed_official 354:e67efb2aab0e 391 /* Configure PGx pins in Alternate function mode */
mbed_official 354:e67efb2aab0e 392 GPIOG->MODER = 0x00200AAA;
mbed_official 354:e67efb2aab0e 393 /* Configure PGx pins speed to 40 MHz */
mbed_official 354:e67efb2aab0e 394 GPIOG->OSPEEDR = 0x00300FFF;
mbed_official 354:e67efb2aab0e 395 /* Configure PGx pins Output type to push-pull */
mbed_official 354:e67efb2aab0e 396 GPIOG->OTYPER = 0x00000000;
mbed_official 354:e67efb2aab0e 397 /* No pull-up, pull-down for PGx pins */
mbed_official 354:e67efb2aab0e 398 GPIOG->PUPDR = 0x00000000;
mbed_official 354:e67efb2aab0e 399
mbed_official 354:e67efb2aab0e 400 /*-- FSMC Configuration ------------------------------------------------------*/
mbed_official 354:e67efb2aab0e 401 /* Enable the FSMC interface clock */
mbed_official 354:e67efb2aab0e 402 RCC->AHBENR = 0x400080D8;
mbed_official 354:e67efb2aab0e 403
mbed_official 354:e67efb2aab0e 404 /* Configure and enable Bank1_SRAM3 */
mbed_official 354:e67efb2aab0e 405 FSMC_Bank1->BTCR[4] = 0x00001011;
mbed_official 354:e67efb2aab0e 406 FSMC_Bank1->BTCR[5] = 0x00000300;
mbed_official 354:e67efb2aab0e 407 FSMC_Bank1E->BWTR[4] = 0x0FFFFFFF;
mbed_official 354:e67efb2aab0e 408 /*
mbed_official 354:e67efb2aab0e 409 Bank1_SRAM3 is configured as follow:
mbed_official 354:e67efb2aab0e 410
mbed_official 354:e67efb2aab0e 411 p.FSMC_AddressSetupTime = 0;
mbed_official 354:e67efb2aab0e 412 p.FSMC_AddressHoldTime = 0;
mbed_official 354:e67efb2aab0e 413 p.FSMC_DataSetupTime = 3;
mbed_official 354:e67efb2aab0e 414 p.FSMC_BusTurnAroundDuration = 0;
mbed_official 354:e67efb2aab0e 415 p.FSMC_CLKDivision = 0;
mbed_official 354:e67efb2aab0e 416 p.FSMC_DataLatency = 0;
mbed_official 354:e67efb2aab0e 417 p.FSMC_AccessMode = FSMC_AccessMode_A;
mbed_official 354:e67efb2aab0e 418
mbed_official 354:e67efb2aab0e 419 FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM3;
mbed_official 354:e67efb2aab0e 420 FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable;
mbed_official 354:e67efb2aab0e 421 FSMC_NORSRAMInitStructure.FSMC_MemoryType = FSMC_MemoryType_SRAM;
mbed_official 354:e67efb2aab0e 422 FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;
mbed_official 354:e67efb2aab0e 423 FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode = FSMC_BurstAccessMode_Disable;
mbed_official 354:e67efb2aab0e 424 FSMC_NORSRAMInitStructure.FSMC_AsynchronousWait = FSMC_AsynchronousWait_Disable;
mbed_official 354:e67efb2aab0e 425 FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low;
mbed_official 354:e67efb2aab0e 426 FSMC_NORSRAMInitStructure.FSMC_WrapMode = FSMC_WrapMode_Disable;
mbed_official 354:e67efb2aab0e 427 FSMC_NORSRAMInitStructure.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState;
mbed_official 354:e67efb2aab0e 428 FSMC_NORSRAMInitStructure.FSMC_WriteOperation = FSMC_WriteOperation_Enable;
mbed_official 354:e67efb2aab0e 429 FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Disable;
mbed_official 354:e67efb2aab0e 430 FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Disable;
mbed_official 354:e67efb2aab0e 431 FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;
mbed_official 354:e67efb2aab0e 432 FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &p;
mbed_official 354:e67efb2aab0e 433 FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &p;
mbed_official 354:e67efb2aab0e 434
mbed_official 354:e67efb2aab0e 435 FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);
mbed_official 354:e67efb2aab0e 436
mbed_official 354:e67efb2aab0e 437 FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM3, ENABLE);
mbed_official 354:e67efb2aab0e 438 */
mbed_official 354:e67efb2aab0e 439
mbed_official 354:e67efb2aab0e 440 }
mbed_official 354:e67efb2aab0e 441 #endif /* DATA_IN_ExtSRAM */
mbed_official 354:e67efb2aab0e 442 #endif /* STM32L151xD || STM32L152xD || STM32L162xD */
mbed_official 354:e67efb2aab0e 443
mbed_official 76:aeb1df146756 444 /**
mbed_official 139:e3413eddde57 445 * @brief Configures the System clock source, PLL Multiplier and Divider factors,
mbed_official 139:e3413eddde57 446 * AHB/APBx prescalers and Flash settings
mbed_official 76:aeb1df146756 447 * @note This function should be called only once the RCC clock configuration
mbed_official 76:aeb1df146756 448 * is reset to the default reset state (done in SystemInit() function).
mbed_official 76:aeb1df146756 449 * @param None
mbed_official 76:aeb1df146756 450 * @retval None
mbed_official 76:aeb1df146756 451 */
mbed_official 129:0182c99221bc 452 void SetSysClock(void)
mbed_official 76:aeb1df146756 453 {
mbed_official 139:e3413eddde57 454 /* 1- Try to start with HSE and external clock */
mbed_official 139:e3413eddde57 455 #if USE_PLL_HSE_EXTC != 0
mbed_official 139:e3413eddde57 456 if (SetSysClock_PLL_HSE(1) == 0)
mbed_official 139:e3413eddde57 457 #endif
mbed_official 139:e3413eddde57 458 {
mbed_official 139:e3413eddde57 459 /* 2- If fail try to start with HSE and external xtal */
mbed_official 139:e3413eddde57 460 #if USE_PLL_HSE_XTAL != 0
mbed_official 139:e3413eddde57 461 if (SetSysClock_PLL_HSE(0) == 0)
mbed_official 139:e3413eddde57 462 #endif
mbed_official 139:e3413eddde57 463 {
mbed_official 139:e3413eddde57 464 /* 3- If fail start with HSI clock */
mbed_official 139:e3413eddde57 465 if (SetSysClock_PLL_HSI() == 0)
mbed_official 139:e3413eddde57 466 {
mbed_official 139:e3413eddde57 467 while(1)
mbed_official 139:e3413eddde57 468 {
mbed_official 139:e3413eddde57 469 // [TODO] Put something here to tell the user that a problem occured...
mbed_official 139:e3413eddde57 470 }
mbed_official 139:e3413eddde57 471 }
mbed_official 139:e3413eddde57 472 }
mbed_official 139:e3413eddde57 473 }
mbed_official 76:aeb1df146756 474
mbed_official 354:e67efb2aab0e 475 /* Output clock on MCO1 pin(PA8) for debugging purpose */
mbed_official 354:e67efb2aab0e 476 //HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_SYSCLK, RCC_MCODIV_1);
mbed_official 139:e3413eddde57 477 }
mbed_official 139:e3413eddde57 478
mbed_official 139:e3413eddde57 479 #if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
mbed_official 139:e3413eddde57 480 /******************************************************************************/
mbed_official 139:e3413eddde57 481 /* PLL (clocked by HSE) used as System clock source */
mbed_official 139:e3413eddde57 482 /******************************************************************************/
mbed_official 139:e3413eddde57 483 uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
mbed_official 139:e3413eddde57 484 {
mbed_official 354:e67efb2aab0e 485 RCC_ClkInitTypeDef RCC_ClkInitStruct;
mbed_official 354:e67efb2aab0e 486 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 139:e3413eddde57 487
mbed_official 354:e67efb2aab0e 488 /* Used to gain time after DeepSleep in case HSI is used */
mbed_official 354:e67efb2aab0e 489 if (__HAL_RCC_GET_FLAG(RCC_FLAG_HSIRDY) != RESET)
mbed_official 76:aeb1df146756 490 {
mbed_official 354:e67efb2aab0e 491 return 0;
mbed_official 354:e67efb2aab0e 492 }
mbed_official 354:e67efb2aab0e 493
mbed_official 354:e67efb2aab0e 494 /* The voltage scaling allows optimizing the power consumption when the device is
mbed_official 354:e67efb2aab0e 495 clocked below the maximum system frequency, to update the voltage scaling value
mbed_official 354:e67efb2aab0e 496 regarding system frequency refer to product datasheet. */
mbed_official 354:e67efb2aab0e 497 __PWR_CLK_ENABLE();
mbed_official 354:e67efb2aab0e 498 __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
mbed_official 354:e67efb2aab0e 499
mbed_official 354:e67efb2aab0e 500 /* Enable HSE and HSI48 oscillators and activate PLL with HSE as source */
mbed_official 354:e67efb2aab0e 501 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_HSI;
mbed_official 354:e67efb2aab0e 502 if (bypass == 0)
mbed_official 354:e67efb2aab0e 503 {
mbed_official 354:e67efb2aab0e 504 RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
mbed_official 76:aeb1df146756 505 }
mbed_official 76:aeb1df146756 506 else
mbed_official 76:aeb1df146756 507 {
mbed_official 354:e67efb2aab0e 508 RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; /* External 8 MHz clock on OSC_IN */
mbed_official 76:aeb1df146756 509 }
mbed_official 354:e67efb2aab0e 510 RCC_OscInitStruct.HSIState = RCC_HSI_OFF;
mbed_official 354:e67efb2aab0e 511 // SYSCLK = 24 MHz ((8 MHz * 6) / 2)
mbed_official 354:e67efb2aab0e 512 // USBCLK = 48 MHz (8 MHz * 6) --> USB OK
mbed_official 354:e67efb2aab0e 513 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
mbed_official 354:e67efb2aab0e 514 RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
mbed_official 354:e67efb2aab0e 515 RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL6;
mbed_official 354:e67efb2aab0e 516 RCC_OscInitStruct.PLL.PLLDIV = RCC_PLL_DIV2;
mbed_official 354:e67efb2aab0e 517 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
mbed_official 76:aeb1df146756 518 {
mbed_official 139:e3413eddde57 519 return 0; // FAIL
mbed_official 139:e3413eddde57 520 }
mbed_official 354:e67efb2aab0e 521
mbed_official 354:e67efb2aab0e 522 /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
mbed_official 354:e67efb2aab0e 523 RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
mbed_official 354:e67efb2aab0e 524 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 24 MHz
mbed_official 354:e67efb2aab0e 525 RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 24 MHz
mbed_official 354:e67efb2aab0e 526 RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; // 24 MHz
mbed_official 354:e67efb2aab0e 527 RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 24 MHz
mbed_official 354:e67efb2aab0e 528 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
mbed_official 354:e67efb2aab0e 529 {
mbed_official 354:e67efb2aab0e 530 return 0; // FAIL
mbed_official 354:e67efb2aab0e 531 }
mbed_official 354:e67efb2aab0e 532
mbed_official 354:e67efb2aab0e 533 /* Output clock on MCO1 pin(PA8) for debugging purpose */
mbed_official 354:e67efb2aab0e 534 //if (bypass == 0)
mbed_official 354:e67efb2aab0e 535 //HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_2); // 4 MHz
mbed_official 354:e67efb2aab0e 536 //else
mbed_official 354:e67efb2aab0e 537 //HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_1); // 8 MHz
mbed_official 354:e67efb2aab0e 538
mbed_official 354:e67efb2aab0e 539 return 1; // OK
mbed_official 139:e3413eddde57 540 }
mbed_official 139:e3413eddde57 541 #endif
mbed_official 139:e3413eddde57 542
mbed_official 139:e3413eddde57 543 /******************************************************************************/
mbed_official 139:e3413eddde57 544 /* PLL (clocked by HSI) used as System clock source */
mbed_official 139:e3413eddde57 545 /******************************************************************************/
mbed_official 139:e3413eddde57 546 uint8_t SetSysClock_PLL_HSI(void)
mbed_official 139:e3413eddde57 547 {
mbed_official 354:e67efb2aab0e 548 RCC_ClkInitTypeDef RCC_ClkInitStruct;
mbed_official 354:e67efb2aab0e 549 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 139:e3413eddde57 550
mbed_official 354:e67efb2aab0e 551 /* The voltage scaling allows optimizing the power consumption when the device is
mbed_official 354:e67efb2aab0e 552 clocked below the maximum system frequency, to update the voltage scaling value
mbed_official 354:e67efb2aab0e 553 regarding system frequency refer to product datasheet. */
mbed_official 354:e67efb2aab0e 554 __PWR_CLK_ENABLE();
mbed_official 354:e67efb2aab0e 555 __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
mbed_official 354:e67efb2aab0e 556
mbed_official 354:e67efb2aab0e 557 /* Enable HSI oscillator and activate PLL with HSI as source */
mbed_official 354:e67efb2aab0e 558 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
mbed_official 354:e67efb2aab0e 559 RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
mbed_official 354:e67efb2aab0e 560 RCC_OscInitStruct.HSIState = RCC_HSI_ON;
mbed_official 354:e67efb2aab0e 561 // SYSCLK = 32 MHz ((16 MHz * 4) / 2)
mbed_official 354:e67efb2aab0e 562 // USBCLK = 64 MHz (16 MHz * 4) --> USB not possible
mbed_official 354:e67efb2aab0e 563 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
mbed_official 354:e67efb2aab0e 564 RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
mbed_official 354:e67efb2aab0e 565 RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL4;
mbed_official 354:e67efb2aab0e 566 RCC_OscInitStruct.PLL.PLLDIV = RCC_PLL_DIV2;
mbed_official 354:e67efb2aab0e 567 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
mbed_official 139:e3413eddde57 568 {
mbed_official 139:e3413eddde57 569 return 0; // FAIL
mbed_official 76:aeb1df146756 570 }
mbed_official 354:e67efb2aab0e 571
mbed_official 354:e67efb2aab0e 572 /* Poll VOSF bit of in PWR_CSR. Wait until it is reset to 0 */
mbed_official 354:e67efb2aab0e 573 while (__HAL_PWR_GET_FLAG(PWR_FLAG_VOS) != RESET) {};
mbed_official 354:e67efb2aab0e 574
mbed_official 354:e67efb2aab0e 575 /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
mbed_official 354:e67efb2aab0e 576 RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
mbed_official 354:e67efb2aab0e 577 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 32 MHz
mbed_official 354:e67efb2aab0e 578 RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 32 MHz
mbed_official 354:e67efb2aab0e 579 RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; // 32 MHz
mbed_official 354:e67efb2aab0e 580 RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 32 MHz
mbed_official 354:e67efb2aab0e 581 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
mbed_official 354:e67efb2aab0e 582 {
mbed_official 354:e67efb2aab0e 583 return 0; // FAIL
mbed_official 354:e67efb2aab0e 584 }
mbed_official 354:e67efb2aab0e 585
mbed_official 354:e67efb2aab0e 586 /* Output clock on MCO1 pin(PA8) for debugging purpose */
mbed_official 354:e67efb2aab0e 587 //HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSI, RCC_MCODIV_1); // 16 MHz
mbed_official 354:e67efb2aab0e 588
mbed_official 354:e67efb2aab0e 589 return 1; // OK
mbed_official 76:aeb1df146756 590 }
mbed_official 76:aeb1df146756 591
mbed_official 76:aeb1df146756 592 /**
mbed_official 76:aeb1df146756 593 * @}
mbed_official 76:aeb1df146756 594 */
mbed_official 76:aeb1df146756 595
mbed_official 76:aeb1df146756 596 /**
mbed_official 76:aeb1df146756 597 * @}
mbed_official 76:aeb1df146756 598 */
mbed_official 76:aeb1df146756 599
mbed_official 76:aeb1df146756 600 /**
mbed_official 76:aeb1df146756 601 * @}
mbed_official 76:aeb1df146756 602 */
mbed_official 76:aeb1df146756 603
mbed_official 354:e67efb2aab0e 604 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/