Mouse code for the MacroRat
mbed-dev/targets/TARGET_STM/TARGET_STM32F0/TARGET_NUCLEO_F030R8/device/system_stm32f0xx.c@46:b156ef445742, 2017-06-03 (annotated)
- Committer:
- sahilmgandhi
- Date:
- Sat Jun 03 00:22:44 2017 +0000
- Revision:
- 46:b156ef445742
- Parent:
- 18:6a4db94011d3
Final code for internal battlebot competition.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
sahilmgandhi | 18:6a4db94011d3 | 1 | /** |
sahilmgandhi | 18:6a4db94011d3 | 2 | ****************************************************************************** |
sahilmgandhi | 18:6a4db94011d3 | 3 | * @file system_stm32f0xx.c |
sahilmgandhi | 18:6a4db94011d3 | 4 | * @author MCD Application Team |
sahilmgandhi | 18:6a4db94011d3 | 5 | * @version V2.3.1 |
sahilmgandhi | 18:6a4db94011d3 | 6 | * @date 04-November-2016 |
sahilmgandhi | 18:6a4db94011d3 | 7 | * @brief CMSIS Cortex-M0 Device Peripheral Access Layer System Source File. |
sahilmgandhi | 18:6a4db94011d3 | 8 | * |
sahilmgandhi | 18:6a4db94011d3 | 9 | * 1. This file provides two functions and one global variable to be called from |
sahilmgandhi | 18:6a4db94011d3 | 10 | * user application: |
sahilmgandhi | 18:6a4db94011d3 | 11 | * - SystemInit(): This function is called at startup just after reset and |
sahilmgandhi | 18:6a4db94011d3 | 12 | * before branch to main program. This call is made inside |
sahilmgandhi | 18:6a4db94011d3 | 13 | * the "startup_stm32f0xx.s" file. |
sahilmgandhi | 18:6a4db94011d3 | 14 | * |
sahilmgandhi | 18:6a4db94011d3 | 15 | * - SystemCoreClock variable: Contains the core clock (HCLK), it can be used |
sahilmgandhi | 18:6a4db94011d3 | 16 | * by the user application to setup the SysTick |
sahilmgandhi | 18:6a4db94011d3 | 17 | * timer or configure other parameters. |
sahilmgandhi | 18:6a4db94011d3 | 18 | * |
sahilmgandhi | 18:6a4db94011d3 | 19 | * - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must |
sahilmgandhi | 18:6a4db94011d3 | 20 | * be called whenever the core clock is changed |
sahilmgandhi | 18:6a4db94011d3 | 21 | * during program execution. |
sahilmgandhi | 18:6a4db94011d3 | 22 | * |
sahilmgandhi | 18:6a4db94011d3 | 23 | * 2. After each device reset the HSI (8 MHz) is used as system clock source. |
sahilmgandhi | 18:6a4db94011d3 | 24 | * Then SystemInit() function is called, in "startup_stm32f0xx.s" file, to |
sahilmgandhi | 18:6a4db94011d3 | 25 | * configure the system clock before to branch to main program. |
sahilmgandhi | 18:6a4db94011d3 | 26 | * |
sahilmgandhi | 18:6a4db94011d3 | 27 | * 3. This file configures the system clock as follows: |
sahilmgandhi | 18:6a4db94011d3 | 28 | *============================================================================= |
sahilmgandhi | 18:6a4db94011d3 | 29 | * System clock source | 1- PLL_HSE_EXTC | 3- PLL_HSI |
sahilmgandhi | 18:6a4db94011d3 | 30 | * | (external 8 MHz clock) | (internal 48 MHz) |
sahilmgandhi | 18:6a4db94011d3 | 31 | * | 2- PLL_HSE_XTAL | |
sahilmgandhi | 18:6a4db94011d3 | 32 | * | (external 8 MHz xtal) | |
sahilmgandhi | 18:6a4db94011d3 | 33 | *----------------------------------------------------------------------------- |
sahilmgandhi | 18:6a4db94011d3 | 34 | * SYSCLK(MHz) | 48 | 48 |
sahilmgandhi | 18:6a4db94011d3 | 35 | *----------------------------------------------------------------------------- |
sahilmgandhi | 18:6a4db94011d3 | 36 | * AHBCLK (MHz) | 48 | 48 |
sahilmgandhi | 18:6a4db94011d3 | 37 | *----------------------------------------------------------------------------- |
sahilmgandhi | 18:6a4db94011d3 | 38 | * APB1CLK (MHz) | 48 | 48 |
sahilmgandhi | 18:6a4db94011d3 | 39 | *----------------------------------------------------------------------------- |
sahilmgandhi | 18:6a4db94011d3 | 40 | * USB capable (48 MHz precise clock) | YES | YES |
sahilmgandhi | 18:6a4db94011d3 | 41 | *============================================================================= |
sahilmgandhi | 18:6a4db94011d3 | 42 | ****************************************************************************** |
sahilmgandhi | 18:6a4db94011d3 | 43 | * @attention |
sahilmgandhi | 18:6a4db94011d3 | 44 | * |
sahilmgandhi | 18:6a4db94011d3 | 45 | * <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2> |
sahilmgandhi | 18:6a4db94011d3 | 46 | * |
sahilmgandhi | 18:6a4db94011d3 | 47 | * Redistribution and use in source and binary forms, with or without modification, |
sahilmgandhi | 18:6a4db94011d3 | 48 | * are permitted provided that the following conditions are met: |
sahilmgandhi | 18:6a4db94011d3 | 49 | * 1. Redistributions of source code must retain the above copyright notice, |
sahilmgandhi | 18:6a4db94011d3 | 50 | * this list of conditions and the following disclaimer. |
sahilmgandhi | 18:6a4db94011d3 | 51 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
sahilmgandhi | 18:6a4db94011d3 | 52 | * this list of conditions and the following disclaimer in the documentation |
sahilmgandhi | 18:6a4db94011d3 | 53 | * and/or other materials provided with the distribution. |
sahilmgandhi | 18:6a4db94011d3 | 54 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
sahilmgandhi | 18:6a4db94011d3 | 55 | * may be used to endorse or promote products derived from this software |
sahilmgandhi | 18:6a4db94011d3 | 56 | * without specific prior written permission. |
sahilmgandhi | 18:6a4db94011d3 | 57 | * |
sahilmgandhi | 18:6a4db94011d3 | 58 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
sahilmgandhi | 18:6a4db94011d3 | 59 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
sahilmgandhi | 18:6a4db94011d3 | 60 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
sahilmgandhi | 18:6a4db94011d3 | 61 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
sahilmgandhi | 18:6a4db94011d3 | 62 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
sahilmgandhi | 18:6a4db94011d3 | 63 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
sahilmgandhi | 18:6a4db94011d3 | 64 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
sahilmgandhi | 18:6a4db94011d3 | 65 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
sahilmgandhi | 18:6a4db94011d3 | 66 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
sahilmgandhi | 18:6a4db94011d3 | 67 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
sahilmgandhi | 18:6a4db94011d3 | 68 | * |
sahilmgandhi | 18:6a4db94011d3 | 69 | ****************************************************************************** |
sahilmgandhi | 18:6a4db94011d3 | 70 | */ |
sahilmgandhi | 18:6a4db94011d3 | 71 | |
sahilmgandhi | 18:6a4db94011d3 | 72 | /** @addtogroup CMSIS |
sahilmgandhi | 18:6a4db94011d3 | 73 | * @{ |
sahilmgandhi | 18:6a4db94011d3 | 74 | */ |
sahilmgandhi | 18:6a4db94011d3 | 75 | |
sahilmgandhi | 18:6a4db94011d3 | 76 | /** @addtogroup stm32f0xx_system |
sahilmgandhi | 18:6a4db94011d3 | 77 | * @{ |
sahilmgandhi | 18:6a4db94011d3 | 78 | */ |
sahilmgandhi | 18:6a4db94011d3 | 79 | |
sahilmgandhi | 18:6a4db94011d3 | 80 | /** @addtogroup STM32F0xx_System_Private_Includes |
sahilmgandhi | 18:6a4db94011d3 | 81 | * @{ |
sahilmgandhi | 18:6a4db94011d3 | 82 | */ |
sahilmgandhi | 18:6a4db94011d3 | 83 | |
sahilmgandhi | 18:6a4db94011d3 | 84 | #include "stm32f0xx.h" |
sahilmgandhi | 18:6a4db94011d3 | 85 | #include "hal_tick.h" |
sahilmgandhi | 18:6a4db94011d3 | 86 | /** |
sahilmgandhi | 18:6a4db94011d3 | 87 | * @} |
sahilmgandhi | 18:6a4db94011d3 | 88 | */ |
sahilmgandhi | 18:6a4db94011d3 | 89 | |
sahilmgandhi | 18:6a4db94011d3 | 90 | /** @addtogroup STM32F0xx_System_Private_TypesDefinitions |
sahilmgandhi | 18:6a4db94011d3 | 91 | * @{ |
sahilmgandhi | 18:6a4db94011d3 | 92 | */ |
sahilmgandhi | 18:6a4db94011d3 | 93 | |
sahilmgandhi | 18:6a4db94011d3 | 94 | /** |
sahilmgandhi | 18:6a4db94011d3 | 95 | * @} |
sahilmgandhi | 18:6a4db94011d3 | 96 | */ |
sahilmgandhi | 18:6a4db94011d3 | 97 | |
sahilmgandhi | 18:6a4db94011d3 | 98 | /** @addtogroup STM32F0xx_System_Private_Defines |
sahilmgandhi | 18:6a4db94011d3 | 99 | * @{ |
sahilmgandhi | 18:6a4db94011d3 | 100 | */ |
sahilmgandhi | 18:6a4db94011d3 | 101 | #if !defined (HSE_VALUE) |
sahilmgandhi | 18:6a4db94011d3 | 102 | #define HSE_VALUE ((uint32_t)8000000) /*!< Default value of the External oscillator in Hz. |
sahilmgandhi | 18:6a4db94011d3 | 103 | This value can be provided and adapted by the user application. */ |
sahilmgandhi | 18:6a4db94011d3 | 104 | #endif /* HSE_VALUE */ |
sahilmgandhi | 18:6a4db94011d3 | 105 | |
sahilmgandhi | 18:6a4db94011d3 | 106 | #if !defined (HSI_VALUE) |
sahilmgandhi | 18:6a4db94011d3 | 107 | #define HSI_VALUE ((uint32_t)8000000) /*!< Default value of the Internal oscillator in Hz. |
sahilmgandhi | 18:6a4db94011d3 | 108 | This value can be provided and adapted by the user application. */ |
sahilmgandhi | 18:6a4db94011d3 | 109 | #endif /* HSI_VALUE */ |
sahilmgandhi | 18:6a4db94011d3 | 110 | |
sahilmgandhi | 18:6a4db94011d3 | 111 | #if !defined (HSI48_VALUE) |
sahilmgandhi | 18:6a4db94011d3 | 112 | #define HSI48_VALUE ((uint32_t)48000000) /*!< Default value of the HSI48 Internal oscillator in Hz. |
sahilmgandhi | 18:6a4db94011d3 | 113 | This value can be provided and adapted by the user application. */ |
sahilmgandhi | 18:6a4db94011d3 | 114 | #endif /* HSI48_VALUE */ |
sahilmgandhi | 18:6a4db94011d3 | 115 | /** |
sahilmgandhi | 18:6a4db94011d3 | 116 | * @} |
sahilmgandhi | 18:6a4db94011d3 | 117 | */ |
sahilmgandhi | 18:6a4db94011d3 | 118 | |
sahilmgandhi | 18:6a4db94011d3 | 119 | /** @addtogroup STM32F0xx_System_Private_Macros |
sahilmgandhi | 18:6a4db94011d3 | 120 | * @{ |
sahilmgandhi | 18:6a4db94011d3 | 121 | */ |
sahilmgandhi | 18:6a4db94011d3 | 122 | |
sahilmgandhi | 18:6a4db94011d3 | 123 | /* Select the clock sources (other than HSI) to start with (0=OFF, 1=ON) */ |
sahilmgandhi | 18:6a4db94011d3 | 124 | #define USE_PLL_HSE_EXTC (1) /* Use external clock */ |
sahilmgandhi | 18:6a4db94011d3 | 125 | #define USE_PLL_HSE_XTAL (1) /* Use external xtal */ |
sahilmgandhi | 18:6a4db94011d3 | 126 | |
sahilmgandhi | 18:6a4db94011d3 | 127 | /** |
sahilmgandhi | 18:6a4db94011d3 | 128 | * @} |
sahilmgandhi | 18:6a4db94011d3 | 129 | */ |
sahilmgandhi | 18:6a4db94011d3 | 130 | |
sahilmgandhi | 18:6a4db94011d3 | 131 | /** @addtogroup STM32F0xx_System_Private_Variables |
sahilmgandhi | 18:6a4db94011d3 | 132 | * @{ |
sahilmgandhi | 18:6a4db94011d3 | 133 | */ |
sahilmgandhi | 18:6a4db94011d3 | 134 | /* This variable is updated in three ways: |
sahilmgandhi | 18:6a4db94011d3 | 135 | 1) by calling CMSIS function SystemCoreClockUpdate() |
sahilmgandhi | 18:6a4db94011d3 | 136 | 2) by calling HAL API function HAL_RCC_GetHCLKFreq() |
sahilmgandhi | 18:6a4db94011d3 | 137 | 3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency |
sahilmgandhi | 18:6a4db94011d3 | 138 | Note: If you use this function to configure the system clock there is no need to |
sahilmgandhi | 18:6a4db94011d3 | 139 | call the 2 first functions listed above, since SystemCoreClock variable is |
sahilmgandhi | 18:6a4db94011d3 | 140 | updated automatically. |
sahilmgandhi | 18:6a4db94011d3 | 141 | */ |
sahilmgandhi | 18:6a4db94011d3 | 142 | uint32_t SystemCoreClock = 48000000; |
sahilmgandhi | 18:6a4db94011d3 | 143 | |
sahilmgandhi | 18:6a4db94011d3 | 144 | const uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9}; |
sahilmgandhi | 18:6a4db94011d3 | 145 | const uint8_t APBPrescTable[8] = {0, 0, 0, 0, 1, 2, 3, 4}; |
sahilmgandhi | 18:6a4db94011d3 | 146 | |
sahilmgandhi | 18:6a4db94011d3 | 147 | /** |
sahilmgandhi | 18:6a4db94011d3 | 148 | * @} |
sahilmgandhi | 18:6a4db94011d3 | 149 | */ |
sahilmgandhi | 18:6a4db94011d3 | 150 | |
sahilmgandhi | 18:6a4db94011d3 | 151 | /** @addtogroup STM32F0xx_System_Private_FunctionPrototypes |
sahilmgandhi | 18:6a4db94011d3 | 152 | * @{ |
sahilmgandhi | 18:6a4db94011d3 | 153 | */ |
sahilmgandhi | 18:6a4db94011d3 | 154 | |
sahilmgandhi | 18:6a4db94011d3 | 155 | #if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0) |
sahilmgandhi | 18:6a4db94011d3 | 156 | uint8_t SetSysClock_PLL_HSE(uint8_t bypass); |
sahilmgandhi | 18:6a4db94011d3 | 157 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 158 | |
sahilmgandhi | 18:6a4db94011d3 | 159 | uint8_t SetSysClock_PLL_HSI(void); |
sahilmgandhi | 18:6a4db94011d3 | 160 | |
sahilmgandhi | 18:6a4db94011d3 | 161 | /** |
sahilmgandhi | 18:6a4db94011d3 | 162 | * @} |
sahilmgandhi | 18:6a4db94011d3 | 163 | */ |
sahilmgandhi | 18:6a4db94011d3 | 164 | |
sahilmgandhi | 18:6a4db94011d3 | 165 | /** @addtogroup STM32F0xx_System_Private_Functions |
sahilmgandhi | 18:6a4db94011d3 | 166 | * @{ |
sahilmgandhi | 18:6a4db94011d3 | 167 | */ |
sahilmgandhi | 18:6a4db94011d3 | 168 | |
sahilmgandhi | 18:6a4db94011d3 | 169 | |
sahilmgandhi | 18:6a4db94011d3 | 170 | /** |
sahilmgandhi | 18:6a4db94011d3 | 171 | * @brief Setup the microcontroller system. |
sahilmgandhi | 18:6a4db94011d3 | 172 | * Initialize the default HSI clock source, vector table location and the PLL configuration is reset. |
sahilmgandhi | 18:6a4db94011d3 | 173 | * @param None |
sahilmgandhi | 18:6a4db94011d3 | 174 | * @retval None |
sahilmgandhi | 18:6a4db94011d3 | 175 | */ |
sahilmgandhi | 18:6a4db94011d3 | 176 | void SystemInit(void) |
sahilmgandhi | 18:6a4db94011d3 | 177 | { |
sahilmgandhi | 18:6a4db94011d3 | 178 | /* Reset the RCC clock configuration to the default reset state ------------*/ |
sahilmgandhi | 18:6a4db94011d3 | 179 | /* Set HSION bit */ |
sahilmgandhi | 18:6a4db94011d3 | 180 | RCC->CR |= (uint32_t)0x00000001U; |
sahilmgandhi | 18:6a4db94011d3 | 181 | |
sahilmgandhi | 18:6a4db94011d3 | 182 | #if defined (STM32F051x8) || defined (STM32F058x8) |
sahilmgandhi | 18:6a4db94011d3 | 183 | /* Reset SW[1:0], HPRE[3:0], PPRE[2:0], ADCPRE and MCOSEL[2:0] bits */ |
sahilmgandhi | 18:6a4db94011d3 | 184 | RCC->CFGR &= (uint32_t)0xF8FFB80CU; |
sahilmgandhi | 18:6a4db94011d3 | 185 | #else |
sahilmgandhi | 18:6a4db94011d3 | 186 | /* Reset SW[1:0], HPRE[3:0], PPRE[2:0], ADCPRE, MCOSEL[2:0], MCOPRE[2:0] and PLLNODIV bits */ |
sahilmgandhi | 18:6a4db94011d3 | 187 | RCC->CFGR &= (uint32_t)0x08FFB80CU; |
sahilmgandhi | 18:6a4db94011d3 | 188 | #endif /* STM32F051x8 or STM32F058x8 */ |
sahilmgandhi | 18:6a4db94011d3 | 189 | |
sahilmgandhi | 18:6a4db94011d3 | 190 | /* Reset HSEON, CSSON and PLLON bits */ |
sahilmgandhi | 18:6a4db94011d3 | 191 | RCC->CR &= (uint32_t)0xFEF6FFFFU; |
sahilmgandhi | 18:6a4db94011d3 | 192 | |
sahilmgandhi | 18:6a4db94011d3 | 193 | /* Reset HSEBYP bit */ |
sahilmgandhi | 18:6a4db94011d3 | 194 | RCC->CR &= (uint32_t)0xFFFBFFFFU; |
sahilmgandhi | 18:6a4db94011d3 | 195 | |
sahilmgandhi | 18:6a4db94011d3 | 196 | /* Reset PLLSRC, PLLXTPRE and PLLMUL[3:0] bits */ |
sahilmgandhi | 18:6a4db94011d3 | 197 | RCC->CFGR &= (uint32_t)0xFFC0FFFFU; |
sahilmgandhi | 18:6a4db94011d3 | 198 | |
sahilmgandhi | 18:6a4db94011d3 | 199 | /* Reset PREDIV[3:0] bits */ |
sahilmgandhi | 18:6a4db94011d3 | 200 | RCC->CFGR2 &= (uint32_t)0xFFFFFFF0U; |
sahilmgandhi | 18:6a4db94011d3 | 201 | |
sahilmgandhi | 18:6a4db94011d3 | 202 | #if defined (STM32F072xB) || defined (STM32F078xx) |
sahilmgandhi | 18:6a4db94011d3 | 203 | /* Reset USART2SW[1:0], USART1SW[1:0], I2C1SW, CECSW, USBSW and ADCSW bits */ |
sahilmgandhi | 18:6a4db94011d3 | 204 | RCC->CFGR3 &= (uint32_t)0xFFFCFE2CU; |
sahilmgandhi | 18:6a4db94011d3 | 205 | #elif defined (STM32F071xB) |
sahilmgandhi | 18:6a4db94011d3 | 206 | /* Reset USART2SW[1:0], USART1SW[1:0], I2C1SW, CECSW and ADCSW bits */ |
sahilmgandhi | 18:6a4db94011d3 | 207 | RCC->CFGR3 &= (uint32_t)0xFFFFCEACU; |
sahilmgandhi | 18:6a4db94011d3 | 208 | #elif defined (STM32F091xC) || defined (STM32F098xx) |
sahilmgandhi | 18:6a4db94011d3 | 209 | /* Reset USART3SW[1:0], USART2SW[1:0], USART1SW[1:0], I2C1SW, CECSW and ADCSW bits */ |
sahilmgandhi | 18:6a4db94011d3 | 210 | RCC->CFGR3 &= (uint32_t)0xFFF0FEACU; |
sahilmgandhi | 18:6a4db94011d3 | 211 | #elif defined (STM32F030x6) || defined (STM32F030x8) || defined (STM32F031x6) || defined (STM32F038xx) || defined (STM32F030xC) |
sahilmgandhi | 18:6a4db94011d3 | 212 | /* Reset USART1SW[1:0], I2C1SW and ADCSW bits */ |
sahilmgandhi | 18:6a4db94011d3 | 213 | RCC->CFGR3 &= (uint32_t)0xFFFFFEECU; |
sahilmgandhi | 18:6a4db94011d3 | 214 | #elif defined (STM32F051x8) || defined (STM32F058xx) |
sahilmgandhi | 18:6a4db94011d3 | 215 | /* Reset USART1SW[1:0], I2C1SW, CECSW and ADCSW bits */ |
sahilmgandhi | 18:6a4db94011d3 | 216 | RCC->CFGR3 &= (uint32_t)0xFFFFFEACU; |
sahilmgandhi | 18:6a4db94011d3 | 217 | #elif defined (STM32F042x6) || defined (STM32F048xx) |
sahilmgandhi | 18:6a4db94011d3 | 218 | /* Reset USART1SW[1:0], I2C1SW, CECSW, USBSW and ADCSW bits */ |
sahilmgandhi | 18:6a4db94011d3 | 219 | RCC->CFGR3 &= (uint32_t)0xFFFFFE2CU; |
sahilmgandhi | 18:6a4db94011d3 | 220 | #elif defined (STM32F070x6) || defined (STM32F070xB) |
sahilmgandhi | 18:6a4db94011d3 | 221 | /* Reset USART1SW[1:0], I2C1SW, USBSW and ADCSW bits */ |
sahilmgandhi | 18:6a4db94011d3 | 222 | RCC->CFGR3 &= (uint32_t)0xFFFFFE6CU; |
sahilmgandhi | 18:6a4db94011d3 | 223 | /* Set default USB clock to PLLCLK, since there is no HSI48 */ |
sahilmgandhi | 18:6a4db94011d3 | 224 | RCC->CFGR3 |= (uint32_t)0x00000080U; |
sahilmgandhi | 18:6a4db94011d3 | 225 | #else |
sahilmgandhi | 18:6a4db94011d3 | 226 | #warning "No target selected" |
sahilmgandhi | 18:6a4db94011d3 | 227 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 228 | |
sahilmgandhi | 18:6a4db94011d3 | 229 | /* Reset HSI14 bit */ |
sahilmgandhi | 18:6a4db94011d3 | 230 | RCC->CR2 &= (uint32_t)0xFFFFFFFEU; |
sahilmgandhi | 18:6a4db94011d3 | 231 | |
sahilmgandhi | 18:6a4db94011d3 | 232 | /* Disable all interrupts */ |
sahilmgandhi | 18:6a4db94011d3 | 233 | RCC->CIR = 0x00000000U; |
sahilmgandhi | 18:6a4db94011d3 | 234 | |
sahilmgandhi | 18:6a4db94011d3 | 235 | /* Enable SYSCFGENR in APB2EN, needed for 1st call of NVIC_SetVector, to copy vectors from flash to ram */ |
sahilmgandhi | 18:6a4db94011d3 | 236 | RCC->APB2ENR |= RCC_APB2ENR_SYSCFGEN; |
sahilmgandhi | 18:6a4db94011d3 | 237 | |
sahilmgandhi | 18:6a4db94011d3 | 238 | /* Configure the Cube driver */ |
sahilmgandhi | 18:6a4db94011d3 | 239 | SystemCoreClock = 8000000; // At this stage the HSI is used as system clock |
sahilmgandhi | 18:6a4db94011d3 | 240 | HAL_Init(); |
sahilmgandhi | 18:6a4db94011d3 | 241 | |
sahilmgandhi | 18:6a4db94011d3 | 242 | /* Configure the System clock source, PLL Multiplier and Divider factors, |
sahilmgandhi | 18:6a4db94011d3 | 243 | AHB/APBx prescalers and Flash settings */ |
sahilmgandhi | 18:6a4db94011d3 | 244 | SetSysClock(); |
sahilmgandhi | 18:6a4db94011d3 | 245 | |
sahilmgandhi | 18:6a4db94011d3 | 246 | /* Reset the timer to avoid issues after the RAM initialization */ |
sahilmgandhi | 18:6a4db94011d3 | 247 | TIM_MST_RESET_ON; |
sahilmgandhi | 18:6a4db94011d3 | 248 | TIM_MST_RESET_OFF; |
sahilmgandhi | 18:6a4db94011d3 | 249 | } |
sahilmgandhi | 18:6a4db94011d3 | 250 | |
sahilmgandhi | 18:6a4db94011d3 | 251 | /** |
sahilmgandhi | 18:6a4db94011d3 | 252 | * @brief Update SystemCoreClock variable according to Clock Register Values. |
sahilmgandhi | 18:6a4db94011d3 | 253 | * The SystemCoreClock variable contains the core clock (HCLK), it can |
sahilmgandhi | 18:6a4db94011d3 | 254 | * be used by the user application to setup the SysTick timer or configure |
sahilmgandhi | 18:6a4db94011d3 | 255 | * other parameters. |
sahilmgandhi | 18:6a4db94011d3 | 256 | * |
sahilmgandhi | 18:6a4db94011d3 | 257 | * @note Each time the core clock (HCLK) changes, this function must be called |
sahilmgandhi | 18:6a4db94011d3 | 258 | * to update SystemCoreClock variable value. Otherwise, any configuration |
sahilmgandhi | 18:6a4db94011d3 | 259 | * based on this variable will be incorrect. |
sahilmgandhi | 18:6a4db94011d3 | 260 | * |
sahilmgandhi | 18:6a4db94011d3 | 261 | * @note - The system frequency computed by this function is not the real |
sahilmgandhi | 18:6a4db94011d3 | 262 | * frequency in the chip. It is calculated based on the predefined |
sahilmgandhi | 18:6a4db94011d3 | 263 | * constant and the selected clock source: |
sahilmgandhi | 18:6a4db94011d3 | 264 | * |
sahilmgandhi | 18:6a4db94011d3 | 265 | * - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(*) |
sahilmgandhi | 18:6a4db94011d3 | 266 | * |
sahilmgandhi | 18:6a4db94011d3 | 267 | * - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(**) |
sahilmgandhi | 18:6a4db94011d3 | 268 | * |
sahilmgandhi | 18:6a4db94011d3 | 269 | * - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(**) |
sahilmgandhi | 18:6a4db94011d3 | 270 | * or HSI_VALUE(*) multiplied/divided by the PLL factors. |
sahilmgandhi | 18:6a4db94011d3 | 271 | * |
sahilmgandhi | 18:6a4db94011d3 | 272 | * (*) HSI_VALUE is a constant defined in stm32f0xx_hal.h file (default value |
sahilmgandhi | 18:6a4db94011d3 | 273 | * 8 MHz) but the real value may vary depending on the variations |
sahilmgandhi | 18:6a4db94011d3 | 274 | * in voltage and temperature. |
sahilmgandhi | 18:6a4db94011d3 | 275 | * |
sahilmgandhi | 18:6a4db94011d3 | 276 | * (**) HSE_VALUE is a constant defined in stm32f0xx_hal.h file (default value |
sahilmgandhi | 18:6a4db94011d3 | 277 | * 8 MHz), user has to ensure that HSE_VALUE is same as the real |
sahilmgandhi | 18:6a4db94011d3 | 278 | * frequency of the crystal used. Otherwise, this function may |
sahilmgandhi | 18:6a4db94011d3 | 279 | * have wrong result. |
sahilmgandhi | 18:6a4db94011d3 | 280 | * |
sahilmgandhi | 18:6a4db94011d3 | 281 | * - The result of this function could be not correct when using fractional |
sahilmgandhi | 18:6a4db94011d3 | 282 | * value for HSE crystal. |
sahilmgandhi | 18:6a4db94011d3 | 283 | * |
sahilmgandhi | 18:6a4db94011d3 | 284 | * @param None |
sahilmgandhi | 18:6a4db94011d3 | 285 | * @retval None |
sahilmgandhi | 18:6a4db94011d3 | 286 | */ |
sahilmgandhi | 18:6a4db94011d3 | 287 | void SystemCoreClockUpdate (void) |
sahilmgandhi | 18:6a4db94011d3 | 288 | { |
sahilmgandhi | 18:6a4db94011d3 | 289 | uint32_t tmp = 0, pllmull = 0, pllsource = 0, predivfactor = 0; |
sahilmgandhi | 18:6a4db94011d3 | 290 | |
sahilmgandhi | 18:6a4db94011d3 | 291 | /* Get SYSCLK source -------------------------------------------------------*/ |
sahilmgandhi | 18:6a4db94011d3 | 292 | tmp = RCC->CFGR & RCC_CFGR_SWS; |
sahilmgandhi | 18:6a4db94011d3 | 293 | |
sahilmgandhi | 18:6a4db94011d3 | 294 | switch (tmp) |
sahilmgandhi | 18:6a4db94011d3 | 295 | { |
sahilmgandhi | 18:6a4db94011d3 | 296 | case RCC_CFGR_SWS_HSI: /* HSI used as system clock */ |
sahilmgandhi | 18:6a4db94011d3 | 297 | SystemCoreClock = HSI_VALUE; |
sahilmgandhi | 18:6a4db94011d3 | 298 | break; |
sahilmgandhi | 18:6a4db94011d3 | 299 | case RCC_CFGR_SWS_HSE: /* HSE used as system clock */ |
sahilmgandhi | 18:6a4db94011d3 | 300 | SystemCoreClock = HSE_VALUE; |
sahilmgandhi | 18:6a4db94011d3 | 301 | break; |
sahilmgandhi | 18:6a4db94011d3 | 302 | case RCC_CFGR_SWS_PLL: /* PLL used as system clock */ |
sahilmgandhi | 18:6a4db94011d3 | 303 | /* Get PLL clock source and multiplication factor ----------------------*/ |
sahilmgandhi | 18:6a4db94011d3 | 304 | pllmull = RCC->CFGR & RCC_CFGR_PLLMUL; |
sahilmgandhi | 18:6a4db94011d3 | 305 | pllsource = RCC->CFGR & RCC_CFGR_PLLSRC; |
sahilmgandhi | 18:6a4db94011d3 | 306 | pllmull = ( pllmull >> 18) + 2; |
sahilmgandhi | 18:6a4db94011d3 | 307 | predivfactor = (RCC->CFGR2 & RCC_CFGR2_PREDIV) + 1; |
sahilmgandhi | 18:6a4db94011d3 | 308 | |
sahilmgandhi | 18:6a4db94011d3 | 309 | if (pllsource == RCC_CFGR_PLLSRC_HSE_PREDIV) |
sahilmgandhi | 18:6a4db94011d3 | 310 | { |
sahilmgandhi | 18:6a4db94011d3 | 311 | /* HSE used as PLL clock source : SystemCoreClock = HSE/PREDIV * PLLMUL */ |
sahilmgandhi | 18:6a4db94011d3 | 312 | SystemCoreClock = (HSE_VALUE/predivfactor) * pllmull; |
sahilmgandhi | 18:6a4db94011d3 | 313 | } |
sahilmgandhi | 18:6a4db94011d3 | 314 | #if defined(STM32F042x6) || defined(STM32F048xx) || defined(STM32F072xB) || defined(STM32F078xx) || defined(STM32F091xC) || defined(STM32F098xx) |
sahilmgandhi | 18:6a4db94011d3 | 315 | else if (pllsource == RCC_CFGR_PLLSRC_HSI48_PREDIV) |
sahilmgandhi | 18:6a4db94011d3 | 316 | { |
sahilmgandhi | 18:6a4db94011d3 | 317 | /* HSI48 used as PLL clock source : SystemCoreClock = HSI48/PREDIV * PLLMUL */ |
sahilmgandhi | 18:6a4db94011d3 | 318 | SystemCoreClock = (HSI48_VALUE/predivfactor) * pllmull; |
sahilmgandhi | 18:6a4db94011d3 | 319 | } |
sahilmgandhi | 18:6a4db94011d3 | 320 | #endif /* STM32F042x6 || STM32F048xx || STM32F072xB || STM32F078xx || STM32F091xC || STM32F098xx */ |
sahilmgandhi | 18:6a4db94011d3 | 321 | else |
sahilmgandhi | 18:6a4db94011d3 | 322 | { |
sahilmgandhi | 18:6a4db94011d3 | 323 | #if defined(STM32F042x6) || defined(STM32F048xx) || defined(STM32F070x6) \ |
sahilmgandhi | 18:6a4db94011d3 | 324 | || defined(STM32F078xx) || defined(STM32F071xB) || defined(STM32F072xB) \ |
sahilmgandhi | 18:6a4db94011d3 | 325 | || defined(STM32F070xB) || defined(STM32F091xC) || defined(STM32F098xx) || defined(STM32F030xC) |
sahilmgandhi | 18:6a4db94011d3 | 326 | /* HSI used as PLL clock source : SystemCoreClock = HSI/PREDIV * PLLMUL */ |
sahilmgandhi | 18:6a4db94011d3 | 327 | SystemCoreClock = (HSI_VALUE/predivfactor) * pllmull; |
sahilmgandhi | 18:6a4db94011d3 | 328 | #else |
sahilmgandhi | 18:6a4db94011d3 | 329 | /* HSI used as PLL clock source : SystemCoreClock = HSI/2 * PLLMUL */ |
sahilmgandhi | 18:6a4db94011d3 | 330 | SystemCoreClock = (HSI_VALUE >> 1) * pllmull; |
sahilmgandhi | 18:6a4db94011d3 | 331 | #endif /* STM32F042x6 || STM32F048xx || STM32F070x6 || |
sahilmgandhi | 18:6a4db94011d3 | 332 | STM32F071xB || STM32F072xB || STM32F078xx || STM32F070xB || |
sahilmgandhi | 18:6a4db94011d3 | 333 | STM32F091xC || STM32F098xx || STM32F030xC */ |
sahilmgandhi | 18:6a4db94011d3 | 334 | } |
sahilmgandhi | 18:6a4db94011d3 | 335 | break; |
sahilmgandhi | 18:6a4db94011d3 | 336 | default: /* HSI used as system clock */ |
sahilmgandhi | 18:6a4db94011d3 | 337 | SystemCoreClock = HSI_VALUE; |
sahilmgandhi | 18:6a4db94011d3 | 338 | break; |
sahilmgandhi | 18:6a4db94011d3 | 339 | } |
sahilmgandhi | 18:6a4db94011d3 | 340 | /* Compute HCLK clock frequency ----------------*/ |
sahilmgandhi | 18:6a4db94011d3 | 341 | /* Get HCLK prescaler */ |
sahilmgandhi | 18:6a4db94011d3 | 342 | tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)]; |
sahilmgandhi | 18:6a4db94011d3 | 343 | /* HCLK clock frequency */ |
sahilmgandhi | 18:6a4db94011d3 | 344 | SystemCoreClock >>= tmp; |
sahilmgandhi | 18:6a4db94011d3 | 345 | } |
sahilmgandhi | 18:6a4db94011d3 | 346 | |
sahilmgandhi | 18:6a4db94011d3 | 347 | /** |
sahilmgandhi | 18:6a4db94011d3 | 348 | * @brief Configures the System clock source, PLL Multiplier and Divider factors, |
sahilmgandhi | 18:6a4db94011d3 | 349 | * AHB/APBx prescalers and Flash settings |
sahilmgandhi | 18:6a4db94011d3 | 350 | * @note This function should be called only once the RCC clock configuration |
sahilmgandhi | 18:6a4db94011d3 | 351 | * is reset to the default reset state (done in SystemInit() function). |
sahilmgandhi | 18:6a4db94011d3 | 352 | * @param None |
sahilmgandhi | 18:6a4db94011d3 | 353 | * @retval None |
sahilmgandhi | 18:6a4db94011d3 | 354 | */ |
sahilmgandhi | 18:6a4db94011d3 | 355 | void SetSysClock(void) |
sahilmgandhi | 18:6a4db94011d3 | 356 | { |
sahilmgandhi | 18:6a4db94011d3 | 357 | /* 1- Try to start with HSE and external clock */ |
sahilmgandhi | 18:6a4db94011d3 | 358 | #if USE_PLL_HSE_EXTC != 0 |
sahilmgandhi | 18:6a4db94011d3 | 359 | if (SetSysClock_PLL_HSE(1) == 0) |
sahilmgandhi | 18:6a4db94011d3 | 360 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 361 | { |
sahilmgandhi | 18:6a4db94011d3 | 362 | /* 2- If fail try to start with HSE and external xtal */ |
sahilmgandhi | 18:6a4db94011d3 | 363 | #if USE_PLL_HSE_XTAL != 0 |
sahilmgandhi | 18:6a4db94011d3 | 364 | if (SetSysClock_PLL_HSE(0) == 0) |
sahilmgandhi | 18:6a4db94011d3 | 365 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 366 | { |
sahilmgandhi | 18:6a4db94011d3 | 367 | /* 3- If fail start with HSI clock */ |
sahilmgandhi | 18:6a4db94011d3 | 368 | if (SetSysClock_PLL_HSI() == 0) |
sahilmgandhi | 18:6a4db94011d3 | 369 | { |
sahilmgandhi | 18:6a4db94011d3 | 370 | while(1) |
sahilmgandhi | 18:6a4db94011d3 | 371 | { |
sahilmgandhi | 18:6a4db94011d3 | 372 | // [TODO] Put something here to tell the user that a problem occured... |
sahilmgandhi | 18:6a4db94011d3 | 373 | } |
sahilmgandhi | 18:6a4db94011d3 | 374 | } |
sahilmgandhi | 18:6a4db94011d3 | 375 | } |
sahilmgandhi | 18:6a4db94011d3 | 376 | } |
sahilmgandhi | 18:6a4db94011d3 | 377 | |
sahilmgandhi | 18:6a4db94011d3 | 378 | // Output clock on MCO pin(PA8) for debugging purpose |
sahilmgandhi | 18:6a4db94011d3 | 379 | // HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_SYSCLK, RCC_MCO_DIV1); // 48 MHz |
sahilmgandhi | 18:6a4db94011d3 | 380 | } |
sahilmgandhi | 18:6a4db94011d3 | 381 | |
sahilmgandhi | 18:6a4db94011d3 | 382 | #if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0) |
sahilmgandhi | 18:6a4db94011d3 | 383 | /******************************************************************************/ |
sahilmgandhi | 18:6a4db94011d3 | 384 | /* PLL (clocked by HSE) used as System clock source */ |
sahilmgandhi | 18:6a4db94011d3 | 385 | /******************************************************************************/ |
sahilmgandhi | 18:6a4db94011d3 | 386 | uint8_t SetSysClock_PLL_HSE(uint8_t bypass) |
sahilmgandhi | 18:6a4db94011d3 | 387 | { |
sahilmgandhi | 18:6a4db94011d3 | 388 | RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; |
sahilmgandhi | 18:6a4db94011d3 | 389 | RCC_OscInitTypeDef RCC_OscInitStruct = {0}; |
sahilmgandhi | 18:6a4db94011d3 | 390 | //Select HSI as system clock source to allow modification of the PLL configuration |
sahilmgandhi | 18:6a4db94011d3 | 391 | RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK; |
sahilmgandhi | 18:6a4db94011d3 | 392 | RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI; |
sahilmgandhi | 18:6a4db94011d3 | 393 | if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) |
sahilmgandhi | 18:6a4db94011d3 | 394 | { |
sahilmgandhi | 18:6a4db94011d3 | 395 | return 0; // FAIL |
sahilmgandhi | 18:6a4db94011d3 | 396 | } |
sahilmgandhi | 18:6a4db94011d3 | 397 | |
sahilmgandhi | 18:6a4db94011d3 | 398 | |
sahilmgandhi | 18:6a4db94011d3 | 399 | // Select HSE oscillator as PLL source |
sahilmgandhi | 18:6a4db94011d3 | 400 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; |
sahilmgandhi | 18:6a4db94011d3 | 401 | if (bypass == 0) { |
sahilmgandhi | 18:6a4db94011d3 | 402 | RCC_OscInitStruct.HSEState = RCC_HSE_ON; // External 8 MHz xtal on OSC_IN/OSC_OUT |
sahilmgandhi | 18:6a4db94011d3 | 403 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 404 | RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; // External 8 MHz clock on OSC_IN only |
sahilmgandhi | 18:6a4db94011d3 | 405 | } |
sahilmgandhi | 18:6a4db94011d3 | 406 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; |
sahilmgandhi | 18:6a4db94011d3 | 407 | RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; |
sahilmgandhi | 18:6a4db94011d3 | 408 | RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV2; |
sahilmgandhi | 18:6a4db94011d3 | 409 | RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL12; |
sahilmgandhi | 18:6a4db94011d3 | 410 | if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { |
sahilmgandhi | 18:6a4db94011d3 | 411 | return 0; // FAIL |
sahilmgandhi | 18:6a4db94011d3 | 412 | } |
sahilmgandhi | 18:6a4db94011d3 | 413 | |
sahilmgandhi | 18:6a4db94011d3 | 414 | // Select PLL as system clock source and configure the HCLK and PCLK1 clocks dividers |
sahilmgandhi | 18:6a4db94011d3 | 415 | RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1); |
sahilmgandhi | 18:6a4db94011d3 | 416 | RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 48 MHz |
sahilmgandhi | 18:6a4db94011d3 | 417 | RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 48 MHz |
sahilmgandhi | 18:6a4db94011d3 | 418 | RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; // 48 MHz |
sahilmgandhi | 18:6a4db94011d3 | 419 | if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) { |
sahilmgandhi | 18:6a4db94011d3 | 420 | return 0; // FAIL |
sahilmgandhi | 18:6a4db94011d3 | 421 | } |
sahilmgandhi | 18:6a4db94011d3 | 422 | |
sahilmgandhi | 18:6a4db94011d3 | 423 | // HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSE, RCC_MCO_DIV2); // 8/2 = 4 MHz |
sahilmgandhi | 18:6a4db94011d3 | 424 | |
sahilmgandhi | 18:6a4db94011d3 | 425 | return 1; // OK |
sahilmgandhi | 18:6a4db94011d3 | 426 | } |
sahilmgandhi | 18:6a4db94011d3 | 427 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 428 | |
sahilmgandhi | 18:6a4db94011d3 | 429 | /******************************************************************************/ |
sahilmgandhi | 18:6a4db94011d3 | 430 | /* PLL (clocked by HSI) used as System clock source */ |
sahilmgandhi | 18:6a4db94011d3 | 431 | /******************************************************************************/ |
sahilmgandhi | 18:6a4db94011d3 | 432 | uint8_t SetSysClock_PLL_HSI(void) |
sahilmgandhi | 18:6a4db94011d3 | 433 | { |
sahilmgandhi | 18:6a4db94011d3 | 434 | RCC_ClkInitTypeDef RCC_ClkInitStruct; |
sahilmgandhi | 18:6a4db94011d3 | 435 | RCC_OscInitTypeDef RCC_OscInitStruct; |
sahilmgandhi | 18:6a4db94011d3 | 436 | |
sahilmgandhi | 18:6a4db94011d3 | 437 | // Select PLLCLK = 48 MHz ((HSI 8 MHz / 2) * 12) |
sahilmgandhi | 18:6a4db94011d3 | 438 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI; |
sahilmgandhi | 18:6a4db94011d3 | 439 | RCC_OscInitStruct.HSEState = RCC_HSE_OFF; |
sahilmgandhi | 18:6a4db94011d3 | 440 | RCC_OscInitStruct.LSEState = RCC_LSE_OFF; |
sahilmgandhi | 18:6a4db94011d3 | 441 | RCC_OscInitStruct.HSIState = RCC_HSI_ON; |
sahilmgandhi | 18:6a4db94011d3 | 442 | RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT; |
sahilmgandhi | 18:6a4db94011d3 | 443 | RCC_OscInitStruct.HSI14State = RCC_HSI_OFF; |
sahilmgandhi | 18:6a4db94011d3 | 444 | RCC_OscInitStruct.HSI14CalibrationValue = RCC_HSI14CALIBRATION_DEFAULT; |
sahilmgandhi | 18:6a4db94011d3 | 445 | RCC_OscInitStruct.HSI48State = RCC_HSI_ON; |
sahilmgandhi | 18:6a4db94011d3 | 446 | RCC_OscInitStruct.LSIState = RCC_LSI_OFF; |
sahilmgandhi | 18:6a4db94011d3 | 447 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; |
sahilmgandhi | 18:6a4db94011d3 | 448 | RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI; // HSI div 2 |
sahilmgandhi | 18:6a4db94011d3 | 449 | RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1; |
sahilmgandhi | 18:6a4db94011d3 | 450 | RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL12; |
sahilmgandhi | 18:6a4db94011d3 | 451 | if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { |
sahilmgandhi | 18:6a4db94011d3 | 452 | return 0; // FAIL |
sahilmgandhi | 18:6a4db94011d3 | 453 | } |
sahilmgandhi | 18:6a4db94011d3 | 454 | |
sahilmgandhi | 18:6a4db94011d3 | 455 | // Select PLL as system clock source and configure the HCLK and PCLK1 clocks dividers |
sahilmgandhi | 18:6a4db94011d3 | 456 | RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1); |
sahilmgandhi | 18:6a4db94011d3 | 457 | RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 48 MHz |
sahilmgandhi | 18:6a4db94011d3 | 458 | RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 48 MHz |
sahilmgandhi | 18:6a4db94011d3 | 459 | RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; // 48 MHz |
sahilmgandhi | 18:6a4db94011d3 | 460 | if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) { |
sahilmgandhi | 18:6a4db94011d3 | 461 | return 0; // FAIL |
sahilmgandhi | 18:6a4db94011d3 | 462 | } |
sahilmgandhi | 18:6a4db94011d3 | 463 | |
sahilmgandhi | 18:6a4db94011d3 | 464 | //HAL_RCC_MCOConfig(RCC_MCO, RCC_MCOSOURCE_HSI, RCC_MCO_DIV4); // 8/4 = 2 MHz |
sahilmgandhi | 18:6a4db94011d3 | 465 | |
sahilmgandhi | 18:6a4db94011d3 | 466 | return 1; // OK |
sahilmgandhi | 18:6a4db94011d3 | 467 | } |
sahilmgandhi | 18:6a4db94011d3 | 468 | |
sahilmgandhi | 18:6a4db94011d3 | 469 | /** |
sahilmgandhi | 18:6a4db94011d3 | 470 | * @} |
sahilmgandhi | 18:6a4db94011d3 | 471 | */ |
sahilmgandhi | 18:6a4db94011d3 | 472 | |
sahilmgandhi | 18:6a4db94011d3 | 473 | /** |
sahilmgandhi | 18:6a4db94011d3 | 474 | * @} |
sahilmgandhi | 18:6a4db94011d3 | 475 | */ |
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sahilmgandhi | 18:6a4db94011d3 | 477 | /** |
sahilmgandhi | 18:6a4db94011d3 | 478 | * @} |
sahilmgandhi | 18:6a4db94011d3 | 479 | */ |
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sahilmgandhi | 18:6a4db94011d3 | 481 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |
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