mbed library sources. Supersedes mbed-src.
Dependents: Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more
targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F446xE/TARGET_NUCLEO_F446RE/system_clock.c@189:f392fc9709a3, 2019-02-20 (annotated)
- Committer:
- AnnaBridge
- Date:
- Wed Feb 20 22:31:08 2019 +0000
- Revision:
- 189:f392fc9709a3
- Parent:
- 187:0387e8f68319
mbed library release version 165
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
AnnaBridge | 168:9672193075cf | 1 | /* mbed Microcontroller Library |
AnnaBridge | 168:9672193075cf | 2 | * Copyright (c) 2006-2017 ARM Limited |
AnnaBridge | 168:9672193075cf | 3 | * |
AnnaBridge | 168:9672193075cf | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
AnnaBridge | 168:9672193075cf | 5 | * you may not use this file except in compliance with the License. |
AnnaBridge | 168:9672193075cf | 6 | * You may obtain a copy of the License at |
AnnaBridge | 168:9672193075cf | 7 | * |
AnnaBridge | 168:9672193075cf | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
AnnaBridge | 168:9672193075cf | 9 | * |
AnnaBridge | 168:9672193075cf | 10 | * Unless required by applicable law or agreed to in writing, software |
AnnaBridge | 168:9672193075cf | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
AnnaBridge | 168:9672193075cf | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
AnnaBridge | 168:9672193075cf | 13 | * See the License for the specific language governing permissions and |
AnnaBridge | 168:9672193075cf | 14 | * limitations under the License. |
AnnaBridge | 168:9672193075cf | 15 | */ |
AnnaBridge | 168:9672193075cf | 16 | |
AnnaBridge | 168:9672193075cf | 17 | /** |
AnnaBridge | 168:9672193075cf | 18 | * This file configures the system clock as follows: |
AnnaBridge | 168:9672193075cf | 19 | *----------------------------------------------------------------------------- |
AnnaBridge | 168:9672193075cf | 20 | * System clock source | 1- USE_PLL_HSE_EXTC | 3- USE_PLL_HSI |
AnnaBridge | 168:9672193075cf | 21 | * | (external 8 MHz clock) | (internal 16 MHz) |
AnnaBridge | 168:9672193075cf | 22 | * | 2- USE_PLL_HSE_XTAL | |
AnnaBridge | 168:9672193075cf | 23 | * | (external 8 MHz xtal) | |
AnnaBridge | 168:9672193075cf | 24 | *----------------------------------------------------------------------------- |
AnnaBridge | 168:9672193075cf | 25 | * SYSCLK(MHz) | 180 | 180 |
AnnaBridge | 168:9672193075cf | 26 | *----------------------------------------------------------------------------- |
AnnaBridge | 168:9672193075cf | 27 | * AHBCLK (MHz) | 180 | 180 |
AnnaBridge | 168:9672193075cf | 28 | *----------------------------------------------------------------------------- |
AnnaBridge | 168:9672193075cf | 29 | * APB1CLK (MHz) | 45 | 45 |
AnnaBridge | 168:9672193075cf | 30 | *----------------------------------------------------------------------------- |
AnnaBridge | 168:9672193075cf | 31 | * APB2CLK (MHz) | 90 | 90 |
AnnaBridge | 168:9672193075cf | 32 | *----------------------------------------------------------------------------- |
AnnaBridge | 168:9672193075cf | 33 | * USB capable (48 MHz precise clock) | YES | YES (HSI calibration needed) |
AnnaBridge | 168:9672193075cf | 34 | *----------------------------------------------------------------------------- |
AnnaBridge | 168:9672193075cf | 35 | **/ |
AnnaBridge | 168:9672193075cf | 36 | |
AnnaBridge | 168:9672193075cf | 37 | #include "stm32f4xx.h" |
AnnaBridge | 187:0387e8f68319 | 38 | #include "mbed_error.h" |
AnnaBridge | 168:9672193075cf | 39 | |
AnnaBridge | 168:9672193075cf | 40 | // clock source is selected with CLOCK_SOURCE in json config |
AnnaBridge | 168:9672193075cf | 41 | #define USE_PLL_HSE_EXTC 0x8 // Use external clock (ST Link MCO) |
AnnaBridge | 168:9672193075cf | 42 | #define USE_PLL_HSE_XTAL 0x4 // Use external xtal (X3 on board - not provided by default) |
AnnaBridge | 168:9672193075cf | 43 | #define USE_PLL_HSI 0x2 // Use HSI internal clock |
AnnaBridge | 168:9672193075cf | 44 | |
AnnaBridge | 168:9672193075cf | 45 | //#define DEBUG_MCO (1) // Output the MCO1/MCO2 on PA8/PC9 for debugging (0=OFF, 1=ON) |
AnnaBridge | 168:9672193075cf | 46 | |
AnnaBridge | 168:9672193075cf | 47 | |
AnnaBridge | 168:9672193075cf | 48 | #if ( ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) ) |
AnnaBridge | 168:9672193075cf | 49 | uint8_t SetSysClock_PLL_HSE(uint8_t bypass); |
AnnaBridge | 168:9672193075cf | 50 | #endif /* ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) */ |
AnnaBridge | 168:9672193075cf | 51 | |
AnnaBridge | 168:9672193075cf | 52 | #if ((CLOCK_SOURCE) & USE_PLL_HSI) |
AnnaBridge | 168:9672193075cf | 53 | uint8_t SetSysClock_PLL_HSI(void); |
AnnaBridge | 168:9672193075cf | 54 | #endif /* ((CLOCK_SOURCE) & USE_PLL_HSI) */ |
AnnaBridge | 168:9672193075cf | 55 | |
AnnaBridge | 168:9672193075cf | 56 | |
AnnaBridge | 168:9672193075cf | 57 | /** |
AnnaBridge | 168:9672193075cf | 58 | * @brief Setup the microcontroller system |
AnnaBridge | 168:9672193075cf | 59 | * Initialize the FPU setting, vector table location and External memory |
AnnaBridge | 168:9672193075cf | 60 | * configuration. |
AnnaBridge | 168:9672193075cf | 61 | * @param None |
AnnaBridge | 168:9672193075cf | 62 | * @retval None |
AnnaBridge | 168:9672193075cf | 63 | */ |
AnnaBridge | 168:9672193075cf | 64 | void SystemInit(void) |
AnnaBridge | 168:9672193075cf | 65 | { |
AnnaBridge | 168:9672193075cf | 66 | /* FPU settings ------------------------------------------------------------*/ |
AnnaBridge | 168:9672193075cf | 67 | #if (__FPU_PRESENT == 1) && (__FPU_USED == 1) |
AnnaBridge | 187:0387e8f68319 | 68 | SCB->CPACR |= ((3UL << 10 * 2) | (3UL << 11 * 2)); /* set CP10 and CP11 Full Access */ |
AnnaBridge | 168:9672193075cf | 69 | #endif |
AnnaBridge | 168:9672193075cf | 70 | /* Reset the RCC clock configuration to the default reset state ------------*/ |
AnnaBridge | 168:9672193075cf | 71 | /* Set HSION bit */ |
AnnaBridge | 168:9672193075cf | 72 | RCC->CR |= (uint32_t)0x00000001; |
AnnaBridge | 168:9672193075cf | 73 | |
AnnaBridge | 168:9672193075cf | 74 | /* Reset CFGR register */ |
AnnaBridge | 168:9672193075cf | 75 | RCC->CFGR = 0x00000000; |
AnnaBridge | 168:9672193075cf | 76 | |
AnnaBridge | 168:9672193075cf | 77 | /* Reset HSEON, CSSON and PLLON bits */ |
AnnaBridge | 168:9672193075cf | 78 | RCC->CR &= (uint32_t)0xFEF6FFFF; |
AnnaBridge | 168:9672193075cf | 79 | |
AnnaBridge | 168:9672193075cf | 80 | /* Reset PLLCFGR register */ |
AnnaBridge | 168:9672193075cf | 81 | RCC->PLLCFGR = 0x24003010; |
AnnaBridge | 168:9672193075cf | 82 | |
AnnaBridge | 168:9672193075cf | 83 | /* Reset HSEBYP bit */ |
AnnaBridge | 168:9672193075cf | 84 | RCC->CR &= (uint32_t)0xFFFBFFFF; |
AnnaBridge | 168:9672193075cf | 85 | |
AnnaBridge | 168:9672193075cf | 86 | /* Disable all interrupts */ |
AnnaBridge | 168:9672193075cf | 87 | RCC->CIR = 0x00000000; |
AnnaBridge | 168:9672193075cf | 88 | |
AnnaBridge | 168:9672193075cf | 89 | #if defined (DATA_IN_ExtSRAM) || defined (DATA_IN_ExtSDRAM) |
AnnaBridge | 168:9672193075cf | 90 | SystemInit_ExtMemCtl(); |
AnnaBridge | 168:9672193075cf | 91 | #endif /* DATA_IN_ExtSRAM || DATA_IN_ExtSDRAM */ |
AnnaBridge | 168:9672193075cf | 92 | |
AnnaBridge | 168:9672193075cf | 93 | } |
AnnaBridge | 168:9672193075cf | 94 | |
AnnaBridge | 168:9672193075cf | 95 | |
AnnaBridge | 168:9672193075cf | 96 | /** |
AnnaBridge | 168:9672193075cf | 97 | * @brief Configures the System clock source, PLL Multiplier and Divider factors, |
AnnaBridge | 168:9672193075cf | 98 | * AHB/APBx prescalers and Flash settings |
AnnaBridge | 168:9672193075cf | 99 | * @note This function should be called only once the RCC clock configuration |
AnnaBridge | 168:9672193075cf | 100 | * is reset to the default reset state (done in SystemInit() function). |
AnnaBridge | 168:9672193075cf | 101 | * @param None |
AnnaBridge | 168:9672193075cf | 102 | * @retval None |
AnnaBridge | 168:9672193075cf | 103 | */ |
AnnaBridge | 168:9672193075cf | 104 | |
AnnaBridge | 168:9672193075cf | 105 | void SetSysClock(void) |
AnnaBridge | 168:9672193075cf | 106 | { |
AnnaBridge | 168:9672193075cf | 107 | #if ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) |
AnnaBridge | 168:9672193075cf | 108 | /* 1- Try to start with HSE and external clock */ |
AnnaBridge | 168:9672193075cf | 109 | if (SetSysClock_PLL_HSE(1) == 0) |
AnnaBridge | 168:9672193075cf | 110 | #endif |
AnnaBridge | 168:9672193075cf | 111 | { |
AnnaBridge | 168:9672193075cf | 112 | #if ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) |
AnnaBridge | 168:9672193075cf | 113 | /* 2- If fail try to start with HSE and external xtal */ |
AnnaBridge | 168:9672193075cf | 114 | if (SetSysClock_PLL_HSE(0) == 0) |
AnnaBridge | 168:9672193075cf | 115 | #endif |
AnnaBridge | 168:9672193075cf | 116 | { |
AnnaBridge | 168:9672193075cf | 117 | #if ((CLOCK_SOURCE) & USE_PLL_HSI) |
AnnaBridge | 168:9672193075cf | 118 | /* 3- If fail start with HSI clock */ |
AnnaBridge | 168:9672193075cf | 119 | if (SetSysClock_PLL_HSI() == 0) |
AnnaBridge | 168:9672193075cf | 120 | #endif |
AnnaBridge | 168:9672193075cf | 121 | { |
AnnaBridge | 187:0387e8f68319 | 122 | { |
AnnaBridge | 187:0387e8f68319 | 123 | error("SetSysClock failed\n"); |
AnnaBridge | 168:9672193075cf | 124 | } |
AnnaBridge | 168:9672193075cf | 125 | } |
AnnaBridge | 168:9672193075cf | 126 | } |
AnnaBridge | 168:9672193075cf | 127 | } |
AnnaBridge | 168:9672193075cf | 128 | |
AnnaBridge | 168:9672193075cf | 129 | // Output clock on MCO2 pin(PC9) for debugging purpose |
AnnaBridge | 168:9672193075cf | 130 | #if DEBUG_MCO == 1 |
AnnaBridge | 168:9672193075cf | 131 | HAL_RCC_MCOConfig(RCC_MCO2, RCC_MCO2SOURCE_SYSCLK, RCC_MCODIV_4); |
AnnaBridge | 168:9672193075cf | 132 | #endif |
AnnaBridge | 168:9672193075cf | 133 | } |
AnnaBridge | 168:9672193075cf | 134 | |
AnnaBridge | 168:9672193075cf | 135 | #if ( ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) ) |
AnnaBridge | 168:9672193075cf | 136 | /******************************************************************************/ |
AnnaBridge | 168:9672193075cf | 137 | /* PLL (clocked by HSE) used as System clock source */ |
AnnaBridge | 168:9672193075cf | 138 | /******************************************************************************/ |
AnnaBridge | 168:9672193075cf | 139 | uint8_t SetSysClock_PLL_HSE(uint8_t bypass) |
AnnaBridge | 168:9672193075cf | 140 | { |
AnnaBridge | 168:9672193075cf | 141 | RCC_OscInitTypeDef RCC_OscInitStruct; |
AnnaBridge | 168:9672193075cf | 142 | RCC_ClkInitTypeDef RCC_ClkInitStruct; |
AnnaBridge | 168:9672193075cf | 143 | RCC_PeriphCLKInitTypeDef PeriphClkInitStruct; |
AnnaBridge | 168:9672193075cf | 144 | |
AnnaBridge | 168:9672193075cf | 145 | /* The voltage scaling allows optimizing the power consumption when the device is |
AnnaBridge | 168:9672193075cf | 146 | clocked below the maximum system frequency, to update the voltage scaling value |
AnnaBridge | 168:9672193075cf | 147 | regarding system frequency refer to product datasheet. */ |
AnnaBridge | 168:9672193075cf | 148 | __HAL_RCC_PWR_CLK_ENABLE(); |
AnnaBridge | 168:9672193075cf | 149 | __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); |
AnnaBridge | 168:9672193075cf | 150 | |
AnnaBridge | 168:9672193075cf | 151 | // Enable HSE oscillator and activate PLL with HSE as source |
AnnaBridge | 168:9672193075cf | 152 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; |
AnnaBridge | 168:9672193075cf | 153 | if (bypass == 0) { |
AnnaBridge | 168:9672193075cf | 154 | RCC_OscInitStruct.HSEState = RCC_HSE_ON; // External 8 MHz xtal on OSC_IN/OSC_OUT |
AnnaBridge | 168:9672193075cf | 155 | } else { |
AnnaBridge | 168:9672193075cf | 156 | RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; // External 8 MHz clock on OSC_IN |
AnnaBridge | 168:9672193075cf | 157 | } |
AnnaBridge | 168:9672193075cf | 158 | |
AnnaBridge | 168:9672193075cf | 159 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; |
AnnaBridge | 168:9672193075cf | 160 | RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; |
AnnaBridge | 168:9672193075cf | 161 | RCC_OscInitStruct.PLL.PLLM = 8; // VCO input clock = 1 MHz (8 MHz / 8) |
AnnaBridge | 168:9672193075cf | 162 | RCC_OscInitStruct.PLL.PLLN = 360; // VCO output clock = 360 MHz (1 MHz * 360) |
AnnaBridge | 168:9672193075cf | 163 | RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; // PLLCLK = 180 MHz (360 MHz / 2) |
AnnaBridge | 168:9672193075cf | 164 | RCC_OscInitStruct.PLL.PLLQ = 7; // |
AnnaBridge | 168:9672193075cf | 165 | RCC_OscInitStruct.PLL.PLLR = 2; // |
AnnaBridge | 168:9672193075cf | 166 | if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { |
AnnaBridge | 168:9672193075cf | 167 | return 0; // FAIL |
AnnaBridge | 168:9672193075cf | 168 | } |
AnnaBridge | 168:9672193075cf | 169 | |
AnnaBridge | 168:9672193075cf | 170 | // Activate the OverDrive to reach the 180 MHz Frequency |
AnnaBridge | 168:9672193075cf | 171 | if (HAL_PWREx_EnableOverDrive() != HAL_OK) { |
AnnaBridge | 168:9672193075cf | 172 | return 0; // FAIL |
AnnaBridge | 168:9672193075cf | 173 | } |
AnnaBridge | 168:9672193075cf | 174 | |
AnnaBridge | 168:9672193075cf | 175 | // Select PLLSAI output as USB clock source |
AnnaBridge | 168:9672193075cf | 176 | PeriphClkInitStruct.PLLSAI.PLLSAIM = 8; |
AnnaBridge | 168:9672193075cf | 177 | PeriphClkInitStruct.PLLSAI.PLLSAIN = 384; |
AnnaBridge | 168:9672193075cf | 178 | PeriphClkInitStruct.PLLSAI.PLLSAIP = RCC_PLLSAIP_DIV8; |
AnnaBridge | 168:9672193075cf | 179 | PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_CLK48; |
AnnaBridge | 168:9672193075cf | 180 | PeriphClkInitStruct.Clk48ClockSelection = RCC_CLK48CLKSOURCE_PLLSAIP; |
AnnaBridge | 168:9672193075cf | 181 | HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct); |
AnnaBridge | 168:9672193075cf | 182 | |
AnnaBridge | 168:9672193075cf | 183 | // Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers |
AnnaBridge | 168:9672193075cf | 184 | RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2; |
AnnaBridge | 168:9672193075cf | 185 | RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; |
AnnaBridge | 168:9672193075cf | 186 | RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 180 MHz |
AnnaBridge | 168:9672193075cf | 187 | RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4; // 45 MHz |
AnnaBridge | 168:9672193075cf | 188 | RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; // 90 MHz |
AnnaBridge | 168:9672193075cf | 189 | if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK) { |
AnnaBridge | 168:9672193075cf | 190 | return 0; // FAIL |
AnnaBridge | 168:9672193075cf | 191 | } |
AnnaBridge | 168:9672193075cf | 192 | |
AnnaBridge | 168:9672193075cf | 193 | // Output clock on MCO1 pin(PA8) for debugging purpose |
AnnaBridge | 168:9672193075cf | 194 | #if DEBUG_MCO == 1 |
AnnaBridge | 187:0387e8f68319 | 195 | if (bypass == 0) { |
AnnaBridge | 187:0387e8f68319 | 196 | HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_2); // 4 MHz with xtal |
AnnaBridge | 187:0387e8f68319 | 197 | } else { |
AnnaBridge | 187:0387e8f68319 | 198 | HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_1); // 8 MHz with external clock (MCO) |
AnnaBridge | 187:0387e8f68319 | 199 | } |
AnnaBridge | 168:9672193075cf | 200 | #endif |
AnnaBridge | 168:9672193075cf | 201 | |
AnnaBridge | 168:9672193075cf | 202 | return 1; // OK |
AnnaBridge | 168:9672193075cf | 203 | } |
AnnaBridge | 168:9672193075cf | 204 | #endif /* ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) */ |
AnnaBridge | 168:9672193075cf | 205 | |
AnnaBridge | 168:9672193075cf | 206 | #if ((CLOCK_SOURCE) & USE_PLL_HSI) |
AnnaBridge | 168:9672193075cf | 207 | /******************************************************************************/ |
AnnaBridge | 168:9672193075cf | 208 | /* PLL (clocked by HSI) used as System clock source */ |
AnnaBridge | 168:9672193075cf | 209 | /******************************************************************************/ |
AnnaBridge | 168:9672193075cf | 210 | uint8_t SetSysClock_PLL_HSI(void) |
AnnaBridge | 168:9672193075cf | 211 | { |
AnnaBridge | 168:9672193075cf | 212 | RCC_OscInitTypeDef RCC_OscInitStruct; |
AnnaBridge | 168:9672193075cf | 213 | RCC_ClkInitTypeDef RCC_ClkInitStruct; |
AnnaBridge | 168:9672193075cf | 214 | RCC_PeriphCLKInitTypeDef PeriphClkInitStruct; |
AnnaBridge | 168:9672193075cf | 215 | |
AnnaBridge | 168:9672193075cf | 216 | /* The voltage scaling allows optimizing the power consumption when the device is |
AnnaBridge | 168:9672193075cf | 217 | clocked below the maximum system frequency, to update the voltage scaling value |
AnnaBridge | 168:9672193075cf | 218 | regarding system frequency refer to product datasheet. */ |
AnnaBridge | 168:9672193075cf | 219 | __HAL_RCC_PWR_CLK_ENABLE(); |
AnnaBridge | 168:9672193075cf | 220 | __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); |
AnnaBridge | 168:9672193075cf | 221 | |
AnnaBridge | 168:9672193075cf | 222 | // Enable HSI oscillator and activate PLL with HSI as source |
AnnaBridge | 168:9672193075cf | 223 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE; |
AnnaBridge | 168:9672193075cf | 224 | RCC_OscInitStruct.HSIState = RCC_HSI_ON; |
AnnaBridge | 168:9672193075cf | 225 | RCC_OscInitStruct.HSEState = RCC_HSE_OFF; |
AnnaBridge | 182:a56a73fd2a6f | 226 | RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT; |
AnnaBridge | 168:9672193075cf | 227 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; |
AnnaBridge | 168:9672193075cf | 228 | RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI; |
AnnaBridge | 168:9672193075cf | 229 | RCC_OscInitStruct.PLL.PLLM = 16; // VCO input clock = 1 MHz (16 MHz / 16) |
AnnaBridge | 168:9672193075cf | 230 | RCC_OscInitStruct.PLL.PLLN = 360; // VCO output clock = 360 MHz (1 MHz * 360) |
AnnaBridge | 168:9672193075cf | 231 | RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; // PLLCLK = 180 MHz (360 MHz / 2) |
AnnaBridge | 168:9672193075cf | 232 | RCC_OscInitStruct.PLL.PLLQ = 7; // |
AnnaBridge | 168:9672193075cf | 233 | RCC_OscInitStruct.PLL.PLLQ = 6; // |
AnnaBridge | 168:9672193075cf | 234 | if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { |
AnnaBridge | 168:9672193075cf | 235 | return 0; // FAIL |
AnnaBridge | 168:9672193075cf | 236 | } |
AnnaBridge | 168:9672193075cf | 237 | |
AnnaBridge | 168:9672193075cf | 238 | // Activate the OverDrive to reach the 180 MHz Frequency |
AnnaBridge | 168:9672193075cf | 239 | if (HAL_PWREx_EnableOverDrive() != HAL_OK) { |
AnnaBridge | 168:9672193075cf | 240 | return 0; // FAIL |
AnnaBridge | 168:9672193075cf | 241 | } |
AnnaBridge | 168:9672193075cf | 242 | |
AnnaBridge | 168:9672193075cf | 243 | // Select PLLSAI output as USB clock source |
AnnaBridge | 168:9672193075cf | 244 | PeriphClkInitStruct.PLLSAI.PLLSAIM = 8; |
AnnaBridge | 168:9672193075cf | 245 | PeriphClkInitStruct.PLLSAI.PLLSAIN = 192; |
AnnaBridge | 168:9672193075cf | 246 | PeriphClkInitStruct.PLLSAI.PLLSAIP = RCC_PLLSAIP_DIV8; |
AnnaBridge | 168:9672193075cf | 247 | PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_CLK48; |
AnnaBridge | 168:9672193075cf | 248 | PeriphClkInitStruct.Clk48ClockSelection = RCC_CLK48CLKSOURCE_PLLSAIP; |
AnnaBridge | 168:9672193075cf | 249 | HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct); |
AnnaBridge | 168:9672193075cf | 250 | |
AnnaBridge | 168:9672193075cf | 251 | /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */ |
AnnaBridge | 168:9672193075cf | 252 | RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2); |
AnnaBridge | 168:9672193075cf | 253 | RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; |
AnnaBridge | 168:9672193075cf | 254 | RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 180 MHz |
AnnaBridge | 168:9672193075cf | 255 | RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4; // 45 MHz |
AnnaBridge | 168:9672193075cf | 256 | RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; // 90 MHz |
AnnaBridge | 168:9672193075cf | 257 | if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK) { |
AnnaBridge | 168:9672193075cf | 258 | return 0; // FAIL |
AnnaBridge | 168:9672193075cf | 259 | } |
AnnaBridge | 168:9672193075cf | 260 | |
AnnaBridge | 168:9672193075cf | 261 | // Output clock on MCO1 pin(PA8) for debugging purpose |
AnnaBridge | 168:9672193075cf | 262 | #if DEBUG_MCO == 1 |
AnnaBridge | 168:9672193075cf | 263 | HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSI, RCC_MCODIV_1); // 16 MHz |
AnnaBridge | 168:9672193075cf | 264 | #endif |
AnnaBridge | 168:9672193075cf | 265 | |
AnnaBridge | 168:9672193075cf | 266 | return 1; // OK |
AnnaBridge | 168:9672193075cf | 267 | } |
AnnaBridge | 168:9672193075cf | 268 | #endif /* ((CLOCK_SOURCE) & USE_PLL_HSI) */ |