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targets/cmsis/TARGET_STM/TARGET_STM32L4/TARGET_NUCLEO_L476RG/system_stm32l4xx.c@637:ed69428d4850, 2015-12-22 (annotated)
- Committer:
- jaerts
- Date:
- Tue Dec 22 13:22:16 2015 +0000
- Revision:
- 637:ed69428d4850
- Parent:
- 622:db79ecd649d0
Add very shady LPC1768 CAN Filter implementation
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 622:db79ecd649d0 | 1 | /** |
mbed_official | 622:db79ecd649d0 | 2 | ****************************************************************************** |
mbed_official | 622:db79ecd649d0 | 3 | * @file system_stm32l4xx.c |
mbed_official | 622:db79ecd649d0 | 4 | * @author MCD Application Team |
mbed_official | 622:db79ecd649d0 | 5 | * @version V1.0.0 |
mbed_official | 622:db79ecd649d0 | 6 | * @date 26-June-2015 |
mbed_official | 622:db79ecd649d0 | 7 | * @brief CMSIS Cortex-M4 Device Peripheral Access Layer System Source File |
mbed_official | 622:db79ecd649d0 | 8 | * |
mbed_official | 622:db79ecd649d0 | 9 | * This file provides two functions and one global variable to be called from |
mbed_official | 622:db79ecd649d0 | 10 | * user application: |
mbed_official | 622:db79ecd649d0 | 11 | * - SystemInit(): This function is called at startup just after reset and |
mbed_official | 622:db79ecd649d0 | 12 | * before branch to main program. This call is made inside |
mbed_official | 622:db79ecd649d0 | 13 | * the "startup_stm32l4xx.s" file. |
mbed_official | 622:db79ecd649d0 | 14 | * |
mbed_official | 622:db79ecd649d0 | 15 | * - SystemCoreClock variable: Contains the core clock (HCLK), it can be used |
mbed_official | 622:db79ecd649d0 | 16 | * by the user application to setup the SysTick |
mbed_official | 622:db79ecd649d0 | 17 | * timer or configure other parameters. |
mbed_official | 622:db79ecd649d0 | 18 | * |
mbed_official | 622:db79ecd649d0 | 19 | * - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must |
mbed_official | 622:db79ecd649d0 | 20 | * be called whenever the core clock is changed |
mbed_official | 622:db79ecd649d0 | 21 | * during program execution. |
mbed_official | 622:db79ecd649d0 | 22 | * |
mbed_official | 622:db79ecd649d0 | 23 | * After each device reset the MSI (4 MHz) is used as system clock source. |
mbed_official | 622:db79ecd649d0 | 24 | * Then SystemInit() function is called, in "startup_stm32l4xx.s" file, to |
mbed_official | 622:db79ecd649d0 | 25 | * configure the system clock before to branch to main program. |
mbed_official | 622:db79ecd649d0 | 26 | * |
mbed_official | 622:db79ecd649d0 | 27 | * This file configures the system clock as follows: |
mbed_official | 622:db79ecd649d0 | 28 | *============================================================================= |
mbed_official | 622:db79ecd649d0 | 29 | * System clock source | 1- PLL_HSE_EXTC | 3- PLL_HSI |
mbed_official | 622:db79ecd649d0 | 30 | * | (external 8 MHz clock) | (internal 16 MHz) |
mbed_official | 622:db79ecd649d0 | 31 | * | 2- PLL_HSE_XTAL | or PLL_MSI |
mbed_official | 622:db79ecd649d0 | 32 | * | (external 8 MHz xtal) | (internal 4 MHz) |
mbed_official | 622:db79ecd649d0 | 33 | *----------------------------------------------------------------------------- |
mbed_official | 622:db79ecd649d0 | 34 | * SYSCLK(MHz) | 48 | 80 |
mbed_official | 622:db79ecd649d0 | 35 | *----------------------------------------------------------------------------- |
mbed_official | 622:db79ecd649d0 | 36 | * AHBCLK (MHz) | 48 | 80 |
mbed_official | 622:db79ecd649d0 | 37 | *----------------------------------------------------------------------------- |
mbed_official | 622:db79ecd649d0 | 38 | * APB1CLK (MHz) | 48 | 80 |
mbed_official | 622:db79ecd649d0 | 39 | *----------------------------------------------------------------------------- |
mbed_official | 622:db79ecd649d0 | 40 | * APB2CLK (MHz) | 48 | 80 |
mbed_official | 622:db79ecd649d0 | 41 | *----------------------------------------------------------------------------- |
mbed_official | 622:db79ecd649d0 | 42 | * USB capable (48 MHz precise clock) | YES | NO |
mbed_official | 622:db79ecd649d0 | 43 | *----------------------------------------------------------------------------- |
mbed_official | 622:db79ecd649d0 | 44 | *============================================================================= |
mbed_official | 622:db79ecd649d0 | 45 | ****************************************************************************** |
mbed_official | 622:db79ecd649d0 | 46 | * @attention |
mbed_official | 622:db79ecd649d0 | 47 | * |
mbed_official | 622:db79ecd649d0 | 48 | * <h2><center>© COPYRIGHT(c) 2015 STMicroelectronics</center></h2> |
mbed_official | 622:db79ecd649d0 | 49 | * |
mbed_official | 622:db79ecd649d0 | 50 | * Redistribution and use in source and binary forms, with or without modification, |
mbed_official | 622:db79ecd649d0 | 51 | * are permitted provided that the following conditions are met: |
mbed_official | 622:db79ecd649d0 | 52 | * 1. Redistributions of source code must retain the above copyright notice, |
mbed_official | 622:db79ecd649d0 | 53 | * this list of conditions and the following disclaimer. |
mbed_official | 622:db79ecd649d0 | 54 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
mbed_official | 622:db79ecd649d0 | 55 | * this list of conditions and the following disclaimer in the documentation |
mbed_official | 622:db79ecd649d0 | 56 | * and/or other materials provided with the distribution. |
mbed_official | 622:db79ecd649d0 | 57 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
mbed_official | 622:db79ecd649d0 | 58 | * may be used to endorse or promote products derived from this software |
mbed_official | 622:db79ecd649d0 | 59 | * without specific prior written permission. |
mbed_official | 622:db79ecd649d0 | 60 | * |
mbed_official | 622:db79ecd649d0 | 61 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
mbed_official | 622:db79ecd649d0 | 62 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
mbed_official | 622:db79ecd649d0 | 63 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
mbed_official | 622:db79ecd649d0 | 64 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
mbed_official | 622:db79ecd649d0 | 65 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
mbed_official | 622:db79ecd649d0 | 66 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
mbed_official | 622:db79ecd649d0 | 67 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
mbed_official | 622:db79ecd649d0 | 68 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
mbed_official | 622:db79ecd649d0 | 69 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
mbed_official | 622:db79ecd649d0 | 70 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
mbed_official | 622:db79ecd649d0 | 71 | * |
mbed_official | 622:db79ecd649d0 | 72 | ****************************************************************************** |
mbed_official | 622:db79ecd649d0 | 73 | */ |
mbed_official | 622:db79ecd649d0 | 74 | |
mbed_official | 622:db79ecd649d0 | 75 | /** @addtogroup CMSIS |
mbed_official | 622:db79ecd649d0 | 76 | * @{ |
mbed_official | 622:db79ecd649d0 | 77 | */ |
mbed_official | 622:db79ecd649d0 | 78 | |
mbed_official | 622:db79ecd649d0 | 79 | /** @addtogroup stm32l4xx_system |
mbed_official | 622:db79ecd649d0 | 80 | * @{ |
mbed_official | 622:db79ecd649d0 | 81 | */ |
mbed_official | 622:db79ecd649d0 | 82 | |
mbed_official | 622:db79ecd649d0 | 83 | /** @addtogroup STM32L4xx_System_Private_Includes |
mbed_official | 622:db79ecd649d0 | 84 | * @{ |
mbed_official | 622:db79ecd649d0 | 85 | */ |
mbed_official | 622:db79ecd649d0 | 86 | |
mbed_official | 622:db79ecd649d0 | 87 | #include "stm32l4xx.h" |
mbed_official | 622:db79ecd649d0 | 88 | #include "hal_tick.h" |
mbed_official | 622:db79ecd649d0 | 89 | |
mbed_official | 622:db79ecd649d0 | 90 | #if !defined (HSE_VALUE) |
mbed_official | 622:db79ecd649d0 | 91 | #define HSE_VALUE ((uint32_t)8000000) /*!< Value of the External oscillator in Hz */ |
mbed_official | 622:db79ecd649d0 | 92 | #endif /* HSE_VALUE */ |
mbed_official | 622:db79ecd649d0 | 93 | |
mbed_official | 622:db79ecd649d0 | 94 | #if !defined (MSI_VALUE) |
mbed_official | 622:db79ecd649d0 | 95 | #define MSI_VALUE ((uint32_t)4000000) /*!< Value of the Internal oscillator in Hz*/ |
mbed_official | 622:db79ecd649d0 | 96 | #endif /* MSI_VALUE */ |
mbed_official | 622:db79ecd649d0 | 97 | |
mbed_official | 622:db79ecd649d0 | 98 | #if !defined (HSI_VALUE) |
mbed_official | 622:db79ecd649d0 | 99 | #define HSI_VALUE ((uint32_t)16000000) /*!< Value of the Internal oscillator in Hz*/ |
mbed_official | 622:db79ecd649d0 | 100 | #endif /* HSI_VALUE */ |
mbed_official | 622:db79ecd649d0 | 101 | |
mbed_official | 622:db79ecd649d0 | 102 | /** |
mbed_official | 622:db79ecd649d0 | 103 | * @} |
mbed_official | 622:db79ecd649d0 | 104 | */ |
mbed_official | 622:db79ecd649d0 | 105 | |
mbed_official | 622:db79ecd649d0 | 106 | /** @addtogroup STM32L4xx_System_Private_TypesDefinitions |
mbed_official | 622:db79ecd649d0 | 107 | * @{ |
mbed_official | 622:db79ecd649d0 | 108 | */ |
mbed_official | 622:db79ecd649d0 | 109 | |
mbed_official | 622:db79ecd649d0 | 110 | /** |
mbed_official | 622:db79ecd649d0 | 111 | * @} |
mbed_official | 622:db79ecd649d0 | 112 | */ |
mbed_official | 622:db79ecd649d0 | 113 | |
mbed_official | 622:db79ecd649d0 | 114 | /** @addtogroup STM32L4xx_System_Private_Defines |
mbed_official | 622:db79ecd649d0 | 115 | * @{ |
mbed_official | 622:db79ecd649d0 | 116 | */ |
mbed_official | 622:db79ecd649d0 | 117 | |
mbed_official | 622:db79ecd649d0 | 118 | /************************* Miscellaneous Configuration ************************/ |
mbed_official | 622:db79ecd649d0 | 119 | /*!< Uncomment the following line if you need to relocate your vector Table in |
mbed_official | 622:db79ecd649d0 | 120 | Internal SRAM. */ |
mbed_official | 622:db79ecd649d0 | 121 | /* #define VECT_TAB_SRAM */ |
mbed_official | 622:db79ecd649d0 | 122 | #define VECT_TAB_OFFSET 0x00 /*!< Vector Table base offset field. |
mbed_official | 622:db79ecd649d0 | 123 | This value must be a multiple of 0x200. */ |
mbed_official | 622:db79ecd649d0 | 124 | /******************************************************************************/ |
mbed_official | 622:db79ecd649d0 | 125 | /** |
mbed_official | 622:db79ecd649d0 | 126 | * @} |
mbed_official | 622:db79ecd649d0 | 127 | */ |
mbed_official | 622:db79ecd649d0 | 128 | |
mbed_official | 622:db79ecd649d0 | 129 | /** @addtogroup STM32L4xx_System_Private_Macros |
mbed_official | 622:db79ecd649d0 | 130 | * @{ |
mbed_official | 622:db79ecd649d0 | 131 | */ |
mbed_official | 622:db79ecd649d0 | 132 | |
mbed_official | 622:db79ecd649d0 | 133 | // Select the clock sources (default is PLL_MSI) to start with (0=OFF, 1=ON) |
mbed_official | 622:db79ecd649d0 | 134 | #define USE_PLL_HSE_EXTC (1) // Use external clock |
mbed_official | 622:db79ecd649d0 | 135 | #define USE_PLL_HSE_XTAL (0) // Use external xtal |
mbed_official | 622:db79ecd649d0 | 136 | #define USE_PLL_HSI (0) // Use HSI/MSI internal clock (0=MSI, 1=HSI) |
mbed_official | 622:db79ecd649d0 | 137 | #define DEBUG_MCO (0) // Output the MCO on PA8 for debugging (0=OFF, 1=SYSCLK, 2=HSE, 3=HSI, 4=MSI) |
mbed_official | 622:db79ecd649d0 | 138 | /** |
mbed_official | 622:db79ecd649d0 | 139 | * @} |
mbed_official | 622:db79ecd649d0 | 140 | */ |
mbed_official | 622:db79ecd649d0 | 141 | |
mbed_official | 622:db79ecd649d0 | 142 | /** @addtogroup STM32L4xx_System_Private_Variables |
mbed_official | 622:db79ecd649d0 | 143 | * @{ |
mbed_official | 622:db79ecd649d0 | 144 | */ |
mbed_official | 622:db79ecd649d0 | 145 | /* This variable is updated in three ways: |
mbed_official | 622:db79ecd649d0 | 146 | 1) by calling CMSIS function SystemCoreClockUpdate() |
mbed_official | 622:db79ecd649d0 | 147 | 2) by calling HAL API function HAL_RCC_GetHCLKFreq() |
mbed_official | 622:db79ecd649d0 | 148 | 3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency |
mbed_official | 622:db79ecd649d0 | 149 | Note: If you use this function to configure the system clock; then there |
mbed_official | 622:db79ecd649d0 | 150 | is no need to call the 2 first functions listed above, since SystemCoreClock |
mbed_official | 622:db79ecd649d0 | 151 | variable is updated automatically. |
mbed_official | 622:db79ecd649d0 | 152 | */ |
mbed_official | 622:db79ecd649d0 | 153 | uint32_t SystemCoreClock = 4000000; |
mbed_official | 622:db79ecd649d0 | 154 | |
mbed_official | 622:db79ecd649d0 | 155 | const uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9}; |
mbed_official | 622:db79ecd649d0 | 156 | const uint32_t MSIRangeTable[12] = {100000, 200000, 400000, 800000, 1000000, 2000000, \ |
mbed_official | 622:db79ecd649d0 | 157 | 4000000, 8000000, 16000000, 24000000, 32000000, 48000000}; |
mbed_official | 622:db79ecd649d0 | 158 | /** |
mbed_official | 622:db79ecd649d0 | 159 | * @} |
mbed_official | 622:db79ecd649d0 | 160 | */ |
mbed_official | 622:db79ecd649d0 | 161 | |
mbed_official | 622:db79ecd649d0 | 162 | /** @addtogroup STM32L4xx_System_Private_FunctionPrototypes |
mbed_official | 622:db79ecd649d0 | 163 | * @{ |
mbed_official | 622:db79ecd649d0 | 164 | */ |
mbed_official | 622:db79ecd649d0 | 165 | |
mbed_official | 622:db79ecd649d0 | 166 | #if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0) |
mbed_official | 622:db79ecd649d0 | 167 | uint8_t SetSysClock_PLL_HSE(uint8_t bypass); |
mbed_official | 622:db79ecd649d0 | 168 | #endif |
mbed_official | 622:db79ecd649d0 | 169 | |
mbed_official | 622:db79ecd649d0 | 170 | #if (USE_PLL_HSI != 0) |
mbed_official | 622:db79ecd649d0 | 171 | uint8_t SetSysClock_PLL_HSI(void); |
mbed_official | 622:db79ecd649d0 | 172 | #endif |
mbed_official | 622:db79ecd649d0 | 173 | |
mbed_official | 622:db79ecd649d0 | 174 | uint8_t SetSysClock_PLL_MSI(void); |
mbed_official | 622:db79ecd649d0 | 175 | |
mbed_official | 622:db79ecd649d0 | 176 | /** |
mbed_official | 622:db79ecd649d0 | 177 | * @} |
mbed_official | 622:db79ecd649d0 | 178 | */ |
mbed_official | 622:db79ecd649d0 | 179 | |
mbed_official | 622:db79ecd649d0 | 180 | /** @addtogroup STM32L4xx_System_Private_Functions |
mbed_official | 622:db79ecd649d0 | 181 | * @{ |
mbed_official | 622:db79ecd649d0 | 182 | */ |
mbed_official | 622:db79ecd649d0 | 183 | |
mbed_official | 622:db79ecd649d0 | 184 | /** |
mbed_official | 622:db79ecd649d0 | 185 | * @brief Setup the microcontroller system. |
mbed_official | 622:db79ecd649d0 | 186 | * @param None |
mbed_official | 622:db79ecd649d0 | 187 | * @retval None |
mbed_official | 622:db79ecd649d0 | 188 | */ |
mbed_official | 622:db79ecd649d0 | 189 | |
mbed_official | 622:db79ecd649d0 | 190 | void SystemInit(void) |
mbed_official | 622:db79ecd649d0 | 191 | { |
mbed_official | 622:db79ecd649d0 | 192 | /* FPU settings ------------------------------------------------------------*/ |
mbed_official | 622:db79ecd649d0 | 193 | #if (__FPU_PRESENT == 1) && (__FPU_USED == 1) |
mbed_official | 622:db79ecd649d0 | 194 | SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */ |
mbed_official | 622:db79ecd649d0 | 195 | #endif |
mbed_official | 622:db79ecd649d0 | 196 | /* Reset the RCC clock configuration to the default reset state ------------*/ |
mbed_official | 622:db79ecd649d0 | 197 | /* Set MSION bit */ |
mbed_official | 622:db79ecd649d0 | 198 | RCC->CR |= RCC_CR_MSION; |
mbed_official | 622:db79ecd649d0 | 199 | |
mbed_official | 622:db79ecd649d0 | 200 | /* Reset CFGR register */ |
mbed_official | 622:db79ecd649d0 | 201 | RCC->CFGR = 0x00000000; |
mbed_official | 622:db79ecd649d0 | 202 | |
mbed_official | 622:db79ecd649d0 | 203 | /* Reset HSEON, CSSON , HSION, and PLLON bits */ |
mbed_official | 622:db79ecd649d0 | 204 | RCC->CR &= (uint32_t)0xEAF6FFFF; |
mbed_official | 622:db79ecd649d0 | 205 | |
mbed_official | 622:db79ecd649d0 | 206 | /* Reset PLLCFGR register */ |
mbed_official | 622:db79ecd649d0 | 207 | RCC->PLLCFGR = 0x00000800; |
mbed_official | 622:db79ecd649d0 | 208 | |
mbed_official | 622:db79ecd649d0 | 209 | /* Reset HSEBYP bit */ |
mbed_official | 622:db79ecd649d0 | 210 | RCC->CR &= (uint32_t)0xFFFBFFFF; |
mbed_official | 622:db79ecd649d0 | 211 | |
mbed_official | 622:db79ecd649d0 | 212 | /* Disable all interrupts */ |
mbed_official | 622:db79ecd649d0 | 213 | RCC->CIER = 0x00000000; |
mbed_official | 622:db79ecd649d0 | 214 | |
mbed_official | 622:db79ecd649d0 | 215 | /* Configure the Vector Table location add offset address ------------------*/ |
mbed_official | 622:db79ecd649d0 | 216 | #ifdef VECT_TAB_SRAM |
mbed_official | 622:db79ecd649d0 | 217 | SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */ |
mbed_official | 622:db79ecd649d0 | 218 | #else |
mbed_official | 622:db79ecd649d0 | 219 | SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */ |
mbed_official | 622:db79ecd649d0 | 220 | #endif |
mbed_official | 622:db79ecd649d0 | 221 | |
mbed_official | 622:db79ecd649d0 | 222 | /* Configure the Cube driver */ |
mbed_official | 622:db79ecd649d0 | 223 | SystemCoreClock = MSI_VALUE; // At this stage the MSI is used as system clock |
mbed_official | 622:db79ecd649d0 | 224 | HAL_Init(); |
mbed_official | 622:db79ecd649d0 | 225 | |
mbed_official | 622:db79ecd649d0 | 226 | /* Configure the System clock source, PLL Multiplier and Divider factors, |
mbed_official | 622:db79ecd649d0 | 227 | AHB/APBx prescalers and Flash settings */ |
mbed_official | 622:db79ecd649d0 | 228 | SetSysClock(); |
mbed_official | 622:db79ecd649d0 | 229 | |
mbed_official | 622:db79ecd649d0 | 230 | /* Reset the timer to avoid issues after the RAM initialization */ |
mbed_official | 622:db79ecd649d0 | 231 | TIM_MST_RESET_ON; |
mbed_official | 622:db79ecd649d0 | 232 | TIM_MST_RESET_OFF; |
mbed_official | 622:db79ecd649d0 | 233 | } |
mbed_official | 622:db79ecd649d0 | 234 | |
mbed_official | 622:db79ecd649d0 | 235 | /** |
mbed_official | 622:db79ecd649d0 | 236 | * @brief Update SystemCoreClock variable according to Clock Register Values. |
mbed_official | 622:db79ecd649d0 | 237 | * The SystemCoreClock variable contains the core clock (HCLK), it can |
mbed_official | 622:db79ecd649d0 | 238 | * be used by the user application to setup the SysTick timer or configure |
mbed_official | 622:db79ecd649d0 | 239 | * other parameters. |
mbed_official | 622:db79ecd649d0 | 240 | * |
mbed_official | 622:db79ecd649d0 | 241 | * @note Each time the core clock (HCLK) changes, this function must be called |
mbed_official | 622:db79ecd649d0 | 242 | * to update SystemCoreClock variable value. Otherwise, any configuration |
mbed_official | 622:db79ecd649d0 | 243 | * based on this variable will be incorrect. |
mbed_official | 622:db79ecd649d0 | 244 | * |
mbed_official | 622:db79ecd649d0 | 245 | * @note - The system frequency computed by this function is not the real |
mbed_official | 622:db79ecd649d0 | 246 | * frequency in the chip. It is calculated based on the predefined |
mbed_official | 622:db79ecd649d0 | 247 | * constant and the selected clock source: |
mbed_official | 622:db79ecd649d0 | 248 | * |
mbed_official | 622:db79ecd649d0 | 249 | * - If SYSCLK source is MSI, SystemCoreClock will contain the MSI_VALUE(*) |
mbed_official | 622:db79ecd649d0 | 250 | * |
mbed_official | 622:db79ecd649d0 | 251 | * - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(**) |
mbed_official | 622:db79ecd649d0 | 252 | * |
mbed_official | 622:db79ecd649d0 | 253 | * - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(***) |
mbed_official | 622:db79ecd649d0 | 254 | * |
mbed_official | 622:db79ecd649d0 | 255 | * - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(***) |
mbed_official | 622:db79ecd649d0 | 256 | * or HSI_VALUE(*) or MSI_VALUE(*) multiplied/divided by the PLL factors. |
mbed_official | 622:db79ecd649d0 | 257 | * |
mbed_official | 622:db79ecd649d0 | 258 | * (*) MSI_VALUE is a constant defined in stm32l4xx_hal.h file (default value |
mbed_official | 622:db79ecd649d0 | 259 | * 4 MHz) but the real value may vary depending on the variations |
mbed_official | 622:db79ecd649d0 | 260 | * in voltage and temperature. |
mbed_official | 622:db79ecd649d0 | 261 | * |
mbed_official | 622:db79ecd649d0 | 262 | * (**) HSI_VALUE is a constant defined in stm32l4xx_hal.h file (default value |
mbed_official | 622:db79ecd649d0 | 263 | * 16 MHz) but the real value may vary depending on the variations |
mbed_official | 622:db79ecd649d0 | 264 | * in voltage and temperature. |
mbed_official | 622:db79ecd649d0 | 265 | * |
mbed_official | 622:db79ecd649d0 | 266 | * (***) HSE_VALUE is a constant defined in stm32l4xx_hal.h file (default value |
mbed_official | 622:db79ecd649d0 | 267 | * 8 MHz), user has to ensure that HSE_VALUE is same as the real |
mbed_official | 622:db79ecd649d0 | 268 | * frequency of the crystal used. Otherwise, this function may |
mbed_official | 622:db79ecd649d0 | 269 | * have wrong result. |
mbed_official | 622:db79ecd649d0 | 270 | * |
mbed_official | 622:db79ecd649d0 | 271 | * - The result of this function could be not correct when using fractional |
mbed_official | 622:db79ecd649d0 | 272 | * value for HSE crystal. |
mbed_official | 622:db79ecd649d0 | 273 | * |
mbed_official | 622:db79ecd649d0 | 274 | * @param None |
mbed_official | 622:db79ecd649d0 | 275 | * @retval None |
mbed_official | 622:db79ecd649d0 | 276 | */ |
mbed_official | 622:db79ecd649d0 | 277 | void SystemCoreClockUpdate(void) |
mbed_official | 622:db79ecd649d0 | 278 | { |
mbed_official | 622:db79ecd649d0 | 279 | uint32_t tmp = 0, msirange = 0, pllvco = 0, pllr = 2, pllsource = 0, pllm = 2; |
mbed_official | 622:db79ecd649d0 | 280 | |
mbed_official | 622:db79ecd649d0 | 281 | /* Get MSI Range frequency--------------------------------------------------*/ |
mbed_official | 622:db79ecd649d0 | 282 | if((RCC->CR & RCC_CR_MSIRGSEL) == RESET) |
mbed_official | 622:db79ecd649d0 | 283 | { /* MSISRANGE from RCC_CSR applies */ |
mbed_official | 622:db79ecd649d0 | 284 | msirange = (RCC->CSR & RCC_CSR_MSISRANGE) >> 8; |
mbed_official | 622:db79ecd649d0 | 285 | } |
mbed_official | 622:db79ecd649d0 | 286 | else |
mbed_official | 622:db79ecd649d0 | 287 | { /* MSIRANGE from RCC_CR applies */ |
mbed_official | 622:db79ecd649d0 | 288 | msirange = (RCC->CR & RCC_CR_MSIRANGE) >> 4; |
mbed_official | 622:db79ecd649d0 | 289 | } |
mbed_official | 622:db79ecd649d0 | 290 | /*MSI frequency range in HZ*/ |
mbed_official | 622:db79ecd649d0 | 291 | msirange = MSIRangeTable[msirange]; |
mbed_official | 622:db79ecd649d0 | 292 | |
mbed_official | 622:db79ecd649d0 | 293 | /* Get SYSCLK source -------------------------------------------------------*/ |
mbed_official | 622:db79ecd649d0 | 294 | switch (RCC->CFGR & RCC_CFGR_SWS) |
mbed_official | 622:db79ecd649d0 | 295 | { |
mbed_official | 622:db79ecd649d0 | 296 | case 0x00: /* MSI used as system clock source */ |
mbed_official | 622:db79ecd649d0 | 297 | SystemCoreClock = msirange; |
mbed_official | 622:db79ecd649d0 | 298 | break; |
mbed_official | 622:db79ecd649d0 | 299 | |
mbed_official | 622:db79ecd649d0 | 300 | case 0x04: /* HSI used as system clock source */ |
mbed_official | 622:db79ecd649d0 | 301 | SystemCoreClock = HSI_VALUE; |
mbed_official | 622:db79ecd649d0 | 302 | break; |
mbed_official | 622:db79ecd649d0 | 303 | |
mbed_official | 622:db79ecd649d0 | 304 | case 0x08: /* HSE used as system clock source */ |
mbed_official | 622:db79ecd649d0 | 305 | SystemCoreClock = HSE_VALUE; |
mbed_official | 622:db79ecd649d0 | 306 | break; |
mbed_official | 622:db79ecd649d0 | 307 | |
mbed_official | 622:db79ecd649d0 | 308 | case 0x0C: /* PLL used as system clock source */ |
mbed_official | 622:db79ecd649d0 | 309 | /* PLL_VCO = (HSE_VALUE or HSI_VALUE or MSI_VALUE/ PLLM) * PLLN |
mbed_official | 622:db79ecd649d0 | 310 | SYSCLK = PLL_VCO / PLLR |
mbed_official | 622:db79ecd649d0 | 311 | */ |
mbed_official | 622:db79ecd649d0 | 312 | pllsource = (RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC); |
mbed_official | 622:db79ecd649d0 | 313 | pllm = ((RCC->PLLCFGR & RCC_PLLCFGR_PLLM) >> 4) + 1 ; |
mbed_official | 622:db79ecd649d0 | 314 | |
mbed_official | 622:db79ecd649d0 | 315 | switch (pllsource) |
mbed_official | 622:db79ecd649d0 | 316 | { |
mbed_official | 622:db79ecd649d0 | 317 | case 0x02: /* HSI used as PLL clock source */ |
mbed_official | 622:db79ecd649d0 | 318 | pllvco = (HSI_VALUE / pllm); |
mbed_official | 622:db79ecd649d0 | 319 | break; |
mbed_official | 622:db79ecd649d0 | 320 | |
mbed_official | 622:db79ecd649d0 | 321 | case 0x03: /* HSE used as PLL clock source */ |
mbed_official | 622:db79ecd649d0 | 322 | pllvco = (HSE_VALUE / pllm); |
mbed_official | 622:db79ecd649d0 | 323 | break; |
mbed_official | 622:db79ecd649d0 | 324 | |
mbed_official | 622:db79ecd649d0 | 325 | default: /* MSI used as PLL clock source */ |
mbed_official | 622:db79ecd649d0 | 326 | pllvco = (msirange / pllm); |
mbed_official | 622:db79ecd649d0 | 327 | break; |
mbed_official | 622:db79ecd649d0 | 328 | } |
mbed_official | 622:db79ecd649d0 | 329 | pllvco = pllvco * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 8); |
mbed_official | 622:db79ecd649d0 | 330 | pllr = (((RCC->PLLCFGR & RCC_PLLCFGR_PLLR) >> 25) + 1) * 2; |
mbed_official | 622:db79ecd649d0 | 331 | SystemCoreClock = pllvco/pllr; |
mbed_official | 622:db79ecd649d0 | 332 | break; |
mbed_official | 622:db79ecd649d0 | 333 | |
mbed_official | 622:db79ecd649d0 | 334 | default: |
mbed_official | 622:db79ecd649d0 | 335 | SystemCoreClock = msirange; |
mbed_official | 622:db79ecd649d0 | 336 | break; |
mbed_official | 622:db79ecd649d0 | 337 | } |
mbed_official | 622:db79ecd649d0 | 338 | /* Compute HCLK clock frequency --------------------------------------------*/ |
mbed_official | 622:db79ecd649d0 | 339 | /* Get HCLK prescaler */ |
mbed_official | 622:db79ecd649d0 | 340 | tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)]; |
mbed_official | 622:db79ecd649d0 | 341 | /* HCLK clock frequency */ |
mbed_official | 622:db79ecd649d0 | 342 | SystemCoreClock >>= tmp; |
mbed_official | 622:db79ecd649d0 | 343 | } |
mbed_official | 622:db79ecd649d0 | 344 | |
mbed_official | 622:db79ecd649d0 | 345 | /** |
mbed_official | 622:db79ecd649d0 | 346 | * @brief Configures the System clock source, PLL Multiplier and Divider factors, |
mbed_official | 622:db79ecd649d0 | 347 | * AHB/APBx prescalers and Flash settings |
mbed_official | 622:db79ecd649d0 | 348 | * @note This function should be called only once the RCC clock configuration |
mbed_official | 622:db79ecd649d0 | 349 | * is reset to the default reset state (done in SystemInit() function). |
mbed_official | 622:db79ecd649d0 | 350 | * @param None |
mbed_official | 622:db79ecd649d0 | 351 | * @retval None |
mbed_official | 622:db79ecd649d0 | 352 | */ |
mbed_official | 622:db79ecd649d0 | 353 | void SetSysClock(void) |
mbed_official | 622:db79ecd649d0 | 354 | { |
mbed_official | 622:db79ecd649d0 | 355 | /* 1- Try to start with HSE and external clock */ |
mbed_official | 622:db79ecd649d0 | 356 | #if USE_PLL_HSE_EXTC != 0 |
mbed_official | 622:db79ecd649d0 | 357 | if (SetSysClock_PLL_HSE(1) == 0) |
mbed_official | 622:db79ecd649d0 | 358 | #endif |
mbed_official | 622:db79ecd649d0 | 359 | { |
mbed_official | 622:db79ecd649d0 | 360 | /* 2- If fail try to start with HSE and external xtal */ |
mbed_official | 622:db79ecd649d0 | 361 | #if USE_PLL_HSE_XTAL != 0 |
mbed_official | 622:db79ecd649d0 | 362 | if (SetSysClock_PLL_HSE(0) == 0) |
mbed_official | 622:db79ecd649d0 | 363 | #endif |
mbed_official | 622:db79ecd649d0 | 364 | { |
mbed_official | 622:db79ecd649d0 | 365 | /* 3- If fail start with HSI or MSI clock */ |
mbed_official | 622:db79ecd649d0 | 366 | #if (USE_PLL_HSI != 0) |
mbed_official | 622:db79ecd649d0 | 367 | if (SetSysClock_PLL_HSI() == 0) |
mbed_official | 622:db79ecd649d0 | 368 | #else |
mbed_official | 622:db79ecd649d0 | 369 | if (SetSysClock_PLL_MSI() == 0) |
mbed_official | 622:db79ecd649d0 | 370 | #endif |
mbed_official | 622:db79ecd649d0 | 371 | { |
mbed_official | 622:db79ecd649d0 | 372 | while(1) |
mbed_official | 622:db79ecd649d0 | 373 | { |
mbed_official | 622:db79ecd649d0 | 374 | // [TODO] Put something here to tell the user that a problem occured... |
mbed_official | 622:db79ecd649d0 | 375 | } |
mbed_official | 622:db79ecd649d0 | 376 | } |
mbed_official | 622:db79ecd649d0 | 377 | } |
mbed_official | 622:db79ecd649d0 | 378 | } |
mbed_official | 622:db79ecd649d0 | 379 | |
mbed_official | 622:db79ecd649d0 | 380 | // Output clock on MCO1 pin(PA8) for debugging purpose |
mbed_official | 622:db79ecd649d0 | 381 | #if DEBUG_MCO == 1 |
mbed_official | 622:db79ecd649d0 | 382 | HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_SYSCLK, RCC_MCODIV_1); |
mbed_official | 622:db79ecd649d0 | 383 | #endif |
mbed_official | 622:db79ecd649d0 | 384 | } |
mbed_official | 622:db79ecd649d0 | 385 | |
mbed_official | 622:db79ecd649d0 | 386 | #if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0) |
mbed_official | 622:db79ecd649d0 | 387 | /******************************************************************************/ |
mbed_official | 622:db79ecd649d0 | 388 | /* PLL (clocked by HSE) used as System clock source */ |
mbed_official | 622:db79ecd649d0 | 389 | /******************************************************************************/ |
mbed_official | 622:db79ecd649d0 | 390 | uint8_t SetSysClock_PLL_HSE(uint8_t bypass) |
mbed_official | 622:db79ecd649d0 | 391 | { |
mbed_official | 622:db79ecd649d0 | 392 | RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; |
mbed_official | 622:db79ecd649d0 | 393 | RCC_OscInitTypeDef RCC_OscInitStruct = {0}; |
mbed_official | 622:db79ecd649d0 | 394 | |
mbed_official | 622:db79ecd649d0 | 395 | // Used to gain time after DeepSleep in case HSI is used |
mbed_official | 622:db79ecd649d0 | 396 | if (__HAL_RCC_GET_FLAG(RCC_FLAG_HSIRDY) != RESET) |
mbed_official | 622:db79ecd649d0 | 397 | { |
mbed_official | 622:db79ecd649d0 | 398 | return 0; |
mbed_official | 622:db79ecd649d0 | 399 | } |
mbed_official | 622:db79ecd649d0 | 400 | |
mbed_official | 622:db79ecd649d0 | 401 | // Select MSI as system clock source to allow modification of the PLL configuration |
mbed_official | 622:db79ecd649d0 | 402 | RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK; |
mbed_official | 622:db79ecd649d0 | 403 | RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI; |
mbed_official | 622:db79ecd649d0 | 404 | HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0); |
mbed_official | 622:db79ecd649d0 | 405 | |
mbed_official | 622:db79ecd649d0 | 406 | // Enable HSE oscillator and activate PLL with HSE as source |
mbed_official | 622:db79ecd649d0 | 407 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_HSI; |
mbed_official | 622:db79ecd649d0 | 408 | if (bypass == 0) |
mbed_official | 622:db79ecd649d0 | 409 | { |
mbed_official | 622:db79ecd649d0 | 410 | RCC_OscInitStruct.HSEState = RCC_HSE_ON; // External 8 MHz xtal on OSC_IN/OSC_OUT |
mbed_official | 622:db79ecd649d0 | 411 | } |
mbed_official | 622:db79ecd649d0 | 412 | else |
mbed_official | 622:db79ecd649d0 | 413 | { |
mbed_official | 622:db79ecd649d0 | 414 | RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; // External 8 MHz clock on OSC_IN |
mbed_official | 622:db79ecd649d0 | 415 | } |
mbed_official | 622:db79ecd649d0 | 416 | RCC_OscInitStruct.HSIState = RCC_HSI_OFF; |
mbed_official | 622:db79ecd649d0 | 417 | RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; // 8 MHz |
mbed_official | 622:db79ecd649d0 | 418 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; |
mbed_official | 622:db79ecd649d0 | 419 | |
mbed_official | 622:db79ecd649d0 | 420 | // Non-USB configuration : sysclock = 80MHz |
mbed_official | 622:db79ecd649d0 | 421 | //RCC_OscInitStruct.PLL.PLLM = 1; // VCO input clock = 8 MHz (8 MHz / 1) |
mbed_official | 622:db79ecd649d0 | 422 | //RCC_OscInitStruct.PLL.PLLN = 20; // VCO output clock = 160 MHz (8 MHz * 20) |
mbed_official | 622:db79ecd649d0 | 423 | //RCC_OscInitStruct.PLL.PLLP = 7; // PLLSAI3 clock = 22 MHz (160 MHz / 7) |
mbed_official | 622:db79ecd649d0 | 424 | //RCC_OscInitStruct.PLL.PLLQ = 4; // USB clock (PLL48M1) = 40 MHz (160 MHz / 4) --> Not good for USB |
mbed_official | 622:db79ecd649d0 | 425 | //RCC_OscInitStruct.PLL.PLLR = 2; // PLL clock = 80 MHz (160 MHz / 2) |
mbed_official | 622:db79ecd649d0 | 426 | |
mbed_official | 622:db79ecd649d0 | 427 | // USB configuration : sysclock = 48 MHz |
mbed_official | 622:db79ecd649d0 | 428 | RCC_OscInitStruct.PLL.PLLM = 1; // VCO input clock = 8 MHz (8 MHz / 1) |
mbed_official | 622:db79ecd649d0 | 429 | RCC_OscInitStruct.PLL.PLLN = 24; // VCO output clock = 192 MHz (8 MHz * 24) |
mbed_official | 622:db79ecd649d0 | 430 | RCC_OscInitStruct.PLL.PLLP = 7; // PLLSAI3 clock = 27.4 MHz (192 MHz / 7) |
mbed_official | 622:db79ecd649d0 | 431 | RCC_OscInitStruct.PLL.PLLQ = 4; // USB clock (PLL48M1) = 48 MHz (192 MHz / 4) --> OK for USB |
mbed_official | 622:db79ecd649d0 | 432 | RCC_OscInitStruct.PLL.PLLR = 4; // PLL clock = 48 MHz (192 MHz / 4) |
mbed_official | 622:db79ecd649d0 | 433 | |
mbed_official | 622:db79ecd649d0 | 434 | if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) |
mbed_official | 622:db79ecd649d0 | 435 | { |
mbed_official | 622:db79ecd649d0 | 436 | return 0; // FAIL |
mbed_official | 622:db79ecd649d0 | 437 | } |
mbed_official | 622:db79ecd649d0 | 438 | |
mbed_official | 622:db79ecd649d0 | 439 | // Select PLL clock as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers |
mbed_official | 622:db79ecd649d0 | 440 | RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2); |
mbed_official | 622:db79ecd649d0 | 441 | RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 80 MHz or 48 MHz |
mbed_official | 622:db79ecd649d0 | 442 | RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 80 MHz or 48 MHz |
mbed_official | 622:db79ecd649d0 | 443 | RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; // 80 MHz or 48 MHz |
mbed_official | 622:db79ecd649d0 | 444 | RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 80 MHz or 48 MHz |
mbed_official | 622:db79ecd649d0 | 445 | if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK) |
mbed_official | 622:db79ecd649d0 | 446 | { |
mbed_official | 622:db79ecd649d0 | 447 | return 0; // FAIL |
mbed_official | 622:db79ecd649d0 | 448 | } |
mbed_official | 622:db79ecd649d0 | 449 | |
mbed_official | 622:db79ecd649d0 | 450 | // Disable MSI Oscillator |
mbed_official | 622:db79ecd649d0 | 451 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI; |
mbed_official | 622:db79ecd649d0 | 452 | RCC_OscInitStruct.MSIState = RCC_MSI_OFF; |
mbed_official | 622:db79ecd649d0 | 453 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // No PLL update |
mbed_official | 622:db79ecd649d0 | 454 | HAL_RCC_OscConfig(&RCC_OscInitStruct); |
mbed_official | 622:db79ecd649d0 | 455 | |
mbed_official | 622:db79ecd649d0 | 456 | // Output clock on MCO1 pin(PA8) for debugging purpose |
mbed_official | 622:db79ecd649d0 | 457 | #if DEBUG_MCO == 2 |
mbed_official | 622:db79ecd649d0 | 458 | if (bypass == 0) |
mbed_official | 622:db79ecd649d0 | 459 | HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_2); // 4 MHz |
mbed_official | 622:db79ecd649d0 | 460 | else |
mbed_official | 622:db79ecd649d0 | 461 | HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_1); // 8 MHz |
mbed_official | 622:db79ecd649d0 | 462 | #endif |
mbed_official | 622:db79ecd649d0 | 463 | |
mbed_official | 622:db79ecd649d0 | 464 | return 1; // OK |
mbed_official | 622:db79ecd649d0 | 465 | } |
mbed_official | 622:db79ecd649d0 | 466 | #endif |
mbed_official | 622:db79ecd649d0 | 467 | |
mbed_official | 622:db79ecd649d0 | 468 | #if (USE_PLL_HSI != 0) |
mbed_official | 622:db79ecd649d0 | 469 | /******************************************************************************/ |
mbed_official | 622:db79ecd649d0 | 470 | /* PLL (clocked by HSI) used as System clock source */ |
mbed_official | 622:db79ecd649d0 | 471 | /******************************************************************************/ |
mbed_official | 622:db79ecd649d0 | 472 | uint8_t SetSysClock_PLL_HSI(void) |
mbed_official | 622:db79ecd649d0 | 473 | { |
mbed_official | 622:db79ecd649d0 | 474 | RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; |
mbed_official | 622:db79ecd649d0 | 475 | RCC_OscInitTypeDef RCC_OscInitStruct = {0}; |
mbed_official | 622:db79ecd649d0 | 476 | |
mbed_official | 622:db79ecd649d0 | 477 | // Select MSI as system clock source to allow modification of the PLL configuration |
mbed_official | 622:db79ecd649d0 | 478 | RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK; |
mbed_official | 622:db79ecd649d0 | 479 | RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI; |
mbed_official | 622:db79ecd649d0 | 480 | HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0); |
mbed_official | 622:db79ecd649d0 | 481 | |
mbed_official | 622:db79ecd649d0 | 482 | // Enable HSI oscillator and activate PLL with HSI as source |
mbed_official | 622:db79ecd649d0 | 483 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE; |
mbed_official | 622:db79ecd649d0 | 484 | RCC_OscInitStruct.HSEState = RCC_HSE_OFF; |
mbed_official | 622:db79ecd649d0 | 485 | RCC_OscInitStruct.HSIState = RCC_HSI_ON; |
mbed_official | 622:db79ecd649d0 | 486 | RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT; |
mbed_official | 622:db79ecd649d0 | 487 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; |
mbed_official | 622:db79ecd649d0 | 488 | RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI; // 16 MHz |
mbed_official | 622:db79ecd649d0 | 489 | RCC_OscInitStruct.PLL.PLLM = 2; // VCO input clock = 8 MHz (16 MHz / 2) |
mbed_official | 622:db79ecd649d0 | 490 | RCC_OscInitStruct.PLL.PLLN = 20; // VCO output clock = 160 MHz (8 MHz * 20) |
mbed_official | 622:db79ecd649d0 | 491 | RCC_OscInitStruct.PLL.PLLP = 7; // PLLSAI3 clock = 22 MHz (160 MHz / 7) |
mbed_official | 622:db79ecd649d0 | 492 | RCC_OscInitStruct.PLL.PLLQ = 4; // USB clock (PLL48M1) = 40 MHz (160 MHz / 4) --> Not good for USB |
mbed_official | 622:db79ecd649d0 | 493 | RCC_OscInitStruct.PLL.PLLR = 2; // PLL clock = 80 MHz (160 MHz / 2) |
mbed_official | 622:db79ecd649d0 | 494 | if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) |
mbed_official | 622:db79ecd649d0 | 495 | { |
mbed_official | 622:db79ecd649d0 | 496 | return 0; // FAIL |
mbed_official | 622:db79ecd649d0 | 497 | } |
mbed_official | 622:db79ecd649d0 | 498 | |
mbed_official | 622:db79ecd649d0 | 499 | // Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers |
mbed_official | 622:db79ecd649d0 | 500 | RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2); |
mbed_official | 622:db79ecd649d0 | 501 | RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 80 MHz |
mbed_official | 622:db79ecd649d0 | 502 | RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 80 MHz |
mbed_official | 622:db79ecd649d0 | 503 | RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; // 80 MHz |
mbed_official | 622:db79ecd649d0 | 504 | RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 80 MHz |
mbed_official | 622:db79ecd649d0 | 505 | if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK) |
mbed_official | 622:db79ecd649d0 | 506 | { |
mbed_official | 622:db79ecd649d0 | 507 | return 0; // FAIL |
mbed_official | 622:db79ecd649d0 | 508 | } |
mbed_official | 622:db79ecd649d0 | 509 | |
mbed_official | 622:db79ecd649d0 | 510 | // Disable MSI Oscillator |
mbed_official | 622:db79ecd649d0 | 511 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI; |
mbed_official | 622:db79ecd649d0 | 512 | RCC_OscInitStruct.MSIState = RCC_MSI_OFF; |
mbed_official | 622:db79ecd649d0 | 513 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // No PLL update |
mbed_official | 622:db79ecd649d0 | 514 | HAL_RCC_OscConfig(&RCC_OscInitStruct); |
mbed_official | 622:db79ecd649d0 | 515 | |
mbed_official | 622:db79ecd649d0 | 516 | // Output clock on MCO1 pin(PA8) for debugging purpose |
mbed_official | 622:db79ecd649d0 | 517 | #if DEBUG_MCO == 3 |
mbed_official | 622:db79ecd649d0 | 518 | HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSI, RCC_MCODIV_1); // 16 MHz |
mbed_official | 622:db79ecd649d0 | 519 | #endif |
mbed_official | 622:db79ecd649d0 | 520 | |
mbed_official | 622:db79ecd649d0 | 521 | return 1; // OK |
mbed_official | 622:db79ecd649d0 | 522 | } |
mbed_official | 622:db79ecd649d0 | 523 | #endif |
mbed_official | 622:db79ecd649d0 | 524 | |
mbed_official | 622:db79ecd649d0 | 525 | /******************************************************************************/ |
mbed_official | 622:db79ecd649d0 | 526 | /* PLL (clocked by MSI) used as System clock source */ |
mbed_official | 622:db79ecd649d0 | 527 | /******************************************************************************/ |
mbed_official | 622:db79ecd649d0 | 528 | uint8_t SetSysClock_PLL_MSI(void) |
mbed_official | 622:db79ecd649d0 | 529 | { |
mbed_official | 622:db79ecd649d0 | 530 | RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; |
mbed_official | 622:db79ecd649d0 | 531 | RCC_OscInitTypeDef RCC_OscInitStruct = {0}; |
mbed_official | 622:db79ecd649d0 | 532 | |
mbed_official | 622:db79ecd649d0 | 533 | // Enable LSE Oscillator to automatically calibrate the MSI clock |
mbed_official | 622:db79ecd649d0 | 534 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE; |
mbed_official | 622:db79ecd649d0 | 535 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // No PLL update |
mbed_official | 622:db79ecd649d0 | 536 | RCC_OscInitStruct.LSEState = RCC_LSE_ON; // External 32.768 kHz clock on OSC_IN/OSC_OUT |
mbed_official | 622:db79ecd649d0 | 537 | if (HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) { |
mbed_official | 622:db79ecd649d0 | 538 | RCC->CR |= RCC_CR_MSIPLLEN; // Enable MSI PLL-mode |
mbed_official | 622:db79ecd649d0 | 539 | } |
mbed_official | 622:db79ecd649d0 | 540 | |
mbed_official | 622:db79ecd649d0 | 541 | // Enable MSI oscillator and activate PLL with MSI as source |
mbed_official | 622:db79ecd649d0 | 542 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI | RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE; |
mbed_official | 622:db79ecd649d0 | 543 | RCC_OscInitStruct.MSIState = RCC_MSI_ON; |
mbed_official | 622:db79ecd649d0 | 544 | RCC_OscInitStruct.HSEState = RCC_HSE_OFF; |
mbed_official | 622:db79ecd649d0 | 545 | RCC_OscInitStruct.HSIState = RCC_HSI_OFF; |
mbed_official | 622:db79ecd649d0 | 546 | RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6; |
mbed_official | 622:db79ecd649d0 | 547 | RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT; |
mbed_official | 622:db79ecd649d0 | 548 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; |
mbed_official | 622:db79ecd649d0 | 549 | RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI; // 4 MHz |
mbed_official | 622:db79ecd649d0 | 550 | RCC_OscInitStruct.PLL.PLLM = 1; // VCO input clock = 4 MHz (4 MHz / 1) |
mbed_official | 622:db79ecd649d0 | 551 | RCC_OscInitStruct.PLL.PLLN = 40; // VCO output clock = 160 MHz (4 MHz * 40) |
mbed_official | 622:db79ecd649d0 | 552 | RCC_OscInitStruct.PLL.PLLP = 7; // PLLSAI3 clock = 22.86 MHz (160 MHz / 7) |
mbed_official | 622:db79ecd649d0 | 553 | RCC_OscInitStruct.PLL.PLLQ = 4; // USB clock (PLL48M1) = 40 MHz (160 MHz / 4) --> Not good for USB |
mbed_official | 622:db79ecd649d0 | 554 | RCC_OscInitStruct.PLL.PLLR = 2; // PLL clock = 80 MHz (160 MHz / 2) |
mbed_official | 622:db79ecd649d0 | 555 | if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) |
mbed_official | 622:db79ecd649d0 | 556 | { |
mbed_official | 622:db79ecd649d0 | 557 | return 0; // FAIL |
mbed_official | 622:db79ecd649d0 | 558 | } |
mbed_official | 622:db79ecd649d0 | 559 | |
mbed_official | 622:db79ecd649d0 | 560 | // Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers |
mbed_official | 622:db79ecd649d0 | 561 | RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2); |
mbed_official | 622:db79ecd649d0 | 562 | RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 80 MHz |
mbed_official | 622:db79ecd649d0 | 563 | RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 80 MHz |
mbed_official | 622:db79ecd649d0 | 564 | RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; // 80 MHz |
mbed_official | 622:db79ecd649d0 | 565 | RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 80 MHz |
mbed_official | 622:db79ecd649d0 | 566 | if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK) |
mbed_official | 622:db79ecd649d0 | 567 | { |
mbed_official | 622:db79ecd649d0 | 568 | return 0; // FAIL |
mbed_official | 622:db79ecd649d0 | 569 | } |
mbed_official | 622:db79ecd649d0 | 570 | |
mbed_official | 622:db79ecd649d0 | 571 | // Output clock on MCO1 pin(PA8) for debugging purpose |
mbed_official | 622:db79ecd649d0 | 572 | #if DEBUG_MCO == 4 |
mbed_official | 622:db79ecd649d0 | 573 | HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_MSI, RCC_MCODIV_2); // 2 MHz |
mbed_official | 622:db79ecd649d0 | 574 | #endif |
mbed_official | 622:db79ecd649d0 | 575 | |
mbed_official | 622:db79ecd649d0 | 576 | return 1; // OK |
mbed_official | 622:db79ecd649d0 | 577 | } |
mbed_official | 622:db79ecd649d0 | 578 | |
mbed_official | 622:db79ecd649d0 | 579 | /** |
mbed_official | 622:db79ecd649d0 | 580 | * @} |
mbed_official | 622:db79ecd649d0 | 581 | */ |
mbed_official | 622:db79ecd649d0 | 582 | |
mbed_official | 622:db79ecd649d0 | 583 | /** |
mbed_official | 622:db79ecd649d0 | 584 | * @} |
mbed_official | 622:db79ecd649d0 | 585 | */ |
mbed_official | 622:db79ecd649d0 | 586 | |
mbed_official | 622:db79ecd649d0 | 587 | /** |
mbed_official | 622:db79ecd649d0 | 588 | * @} |
mbed_official | 622:db79ecd649d0 | 589 | */ |
mbed_official | 622:db79ecd649d0 | 590 | |
mbed_official | 622:db79ecd649d0 | 591 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |