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_B96B_F446VE/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- PLL_HSE_XTAL | 3- PLL_HSI |
AnnaBridge | 168:9672193075cf | 21 | * | (external 16 MHz xtal) | (internal 16 MHz) |
AnnaBridge | 168:9672193075cf | 22 | *----------------------------------------------------------------------------- |
AnnaBridge | 168:9672193075cf | 23 | * SYSCLK(MHz) | 180 | 180 |
AnnaBridge | 168:9672193075cf | 24 | *----------------------------------------------------------------------------- |
AnnaBridge | 168:9672193075cf | 25 | * AHBCLK (MHz) | 180 | 180 |
AnnaBridge | 168:9672193075cf | 26 | *----------------------------------------------------------------------------- |
AnnaBridge | 168:9672193075cf | 27 | * APB1CLK (MHz) | 45 | 45 |
AnnaBridge | 168:9672193075cf | 28 | *----------------------------------------------------------------------------- |
AnnaBridge | 168:9672193075cf | 29 | * APB2CLK (MHz) | 90 | 90 |
AnnaBridge | 168:9672193075cf | 30 | *----------------------------------------------------------------------------- |
AnnaBridge | 168:9672193075cf | 31 | * USB capable (48 MHz precise clock) | YES | NO |
AnnaBridge | 168:9672193075cf | 32 | *----------------------------------------------------------------------------- |
AnnaBridge | 168:9672193075cf | 33 | **/ |
AnnaBridge | 168:9672193075cf | 34 | |
AnnaBridge | 168:9672193075cf | 35 | #include "stm32f4xx.h" |
AnnaBridge | 168:9672193075cf | 36 | /*!< Uncomment the following line if you need to relocate your vector Table in |
AnnaBridge | 168:9672193075cf | 37 | Internal SRAM. */ |
AnnaBridge | 168:9672193075cf | 38 | /* #define VECT_TAB_SRAM */ |
AnnaBridge | 168:9672193075cf | 39 | #define VECT_TAB_OFFSET 0x00 /*!< Vector Table base offset field. |
AnnaBridge | 168:9672193075cf | 40 | This value must be a multiple of 0x200. */ |
AnnaBridge | 168:9672193075cf | 41 | |
AnnaBridge | 168:9672193075cf | 42 | /* Select the clock sources (other than HSI) to start with (0=OFF, 1=ON) */ |
AnnaBridge | 168:9672193075cf | 43 | #define USE_PLL_HSE_EXTC (0) /* Use external clock */ |
AnnaBridge | 168:9672193075cf | 44 | #define USE_PLL_HSE_XTAL (1) /* Use external xtal */ |
AnnaBridge | 168:9672193075cf | 45 | |
AnnaBridge | 168:9672193075cf | 46 | #define DEBUG_MCO (0) // 0=OFF |
AnnaBridge | 168:9672193075cf | 47 | // 1=Output the MCO1 on PA8 |
AnnaBridge | 168:9672193075cf | 48 | // 2=Output the MCO2 on PC9 |
AnnaBridge | 168:9672193075cf | 49 | |
AnnaBridge | 168:9672193075cf | 50 | |
AnnaBridge | 168:9672193075cf | 51 | #if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0) |
AnnaBridge | 168:9672193075cf | 52 | uint8_t SetSysClock_PLL_HSE(uint8_t bypass); |
AnnaBridge | 168:9672193075cf | 53 | #endif |
AnnaBridge | 168:9672193075cf | 54 | |
AnnaBridge | 168:9672193075cf | 55 | uint8_t SetSysClock_PLL_HSI(void); |
AnnaBridge | 168:9672193075cf | 56 | |
AnnaBridge | 168:9672193075cf | 57 | |
AnnaBridge | 168:9672193075cf | 58 | /** |
AnnaBridge | 168:9672193075cf | 59 | * @brief Setup the microcontroller system |
AnnaBridge | 168:9672193075cf | 60 | * Initialize the FPU setting, vector table location and External memory |
AnnaBridge | 168:9672193075cf | 61 | * configuration. |
AnnaBridge | 168:9672193075cf | 62 | * @param None |
AnnaBridge | 168:9672193075cf | 63 | * @retval None |
AnnaBridge | 168:9672193075cf | 64 | */ |
AnnaBridge | 168:9672193075cf | 65 | void SystemInit(void) |
AnnaBridge | 168:9672193075cf | 66 | { |
AnnaBridge | 168:9672193075cf | 67 | /* FPU settings ------------------------------------------------------------*/ |
AnnaBridge | 168:9672193075cf | 68 | #if (__FPU_PRESENT == 1) && (__FPU_USED == 1) |
AnnaBridge | 187:0387e8f68319 | 69 | SCB->CPACR |= ((3UL << 10 * 2) | (3UL << 11 * 2)); /* set CP10 and CP11 Full Access */ |
AnnaBridge | 168:9672193075cf | 70 | #endif |
AnnaBridge | 168:9672193075cf | 71 | /* Reset the RCC clock configuration to the default reset state ------------*/ |
AnnaBridge | 168:9672193075cf | 72 | /* Set HSION bit */ |
AnnaBridge | 168:9672193075cf | 73 | RCC->CR |= (uint32_t)0x00000001; |
AnnaBridge | 168:9672193075cf | 74 | |
AnnaBridge | 168:9672193075cf | 75 | /* Reset CFGR register */ |
AnnaBridge | 168:9672193075cf | 76 | RCC->CFGR = 0x00000000; |
AnnaBridge | 168:9672193075cf | 77 | |
AnnaBridge | 168:9672193075cf | 78 | /* Reset HSEON, CSSON and PLLON bits */ |
AnnaBridge | 168:9672193075cf | 79 | RCC->CR &= (uint32_t)0xFEF6FFFF; |
AnnaBridge | 168:9672193075cf | 80 | |
AnnaBridge | 168:9672193075cf | 81 | /* Reset PLLCFGR register */ |
AnnaBridge | 168:9672193075cf | 82 | RCC->PLLCFGR = 0x24003010; |
AnnaBridge | 168:9672193075cf | 83 | |
AnnaBridge | 168:9672193075cf | 84 | /* Reset HSEBYP bit */ |
AnnaBridge | 168:9672193075cf | 85 | RCC->CR &= (uint32_t)0xFFFBFFFF; |
AnnaBridge | 168:9672193075cf | 86 | |
AnnaBridge | 168:9672193075cf | 87 | /* Disable all interrupts */ |
AnnaBridge | 168:9672193075cf | 88 | RCC->CIR = 0x00000000; |
AnnaBridge | 168:9672193075cf | 89 | |
AnnaBridge | 168:9672193075cf | 90 | #if defined (DATA_IN_ExtSRAM) || defined (DATA_IN_ExtSDRAM) |
AnnaBridge | 168:9672193075cf | 91 | SystemInit_ExtMemCtl(); |
AnnaBridge | 168:9672193075cf | 92 | #endif /* DATA_IN_ExtSRAM || DATA_IN_ExtSDRAM */ |
AnnaBridge | 168:9672193075cf | 93 | |
AnnaBridge | 168:9672193075cf | 94 | /* Configure the Vector Table location add offset address ------------------*/ |
AnnaBridge | 168:9672193075cf | 95 | #ifdef VECT_TAB_SRAM |
AnnaBridge | 168:9672193075cf | 96 | SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */ |
AnnaBridge | 168:9672193075cf | 97 | #else |
AnnaBridge | 168:9672193075cf | 98 | SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */ |
AnnaBridge | 168:9672193075cf | 99 | #endif |
AnnaBridge | 168:9672193075cf | 100 | |
AnnaBridge | 168:9672193075cf | 101 | } |
AnnaBridge | 168:9672193075cf | 102 | |
AnnaBridge | 168:9672193075cf | 103 | |
AnnaBridge | 168:9672193075cf | 104 | /** |
AnnaBridge | 168:9672193075cf | 105 | * @brief Configures the System clock source, PLL Multiplier and Divider factors, |
AnnaBridge | 168:9672193075cf | 106 | * AHB/APBx prescalers and Flash settings |
AnnaBridge | 168:9672193075cf | 107 | * @note This function should be called only once the RCC clock configuration |
AnnaBridge | 168:9672193075cf | 108 | * is reset to the default reset state (done in SystemInit() function). |
AnnaBridge | 168:9672193075cf | 109 | * @param None |
AnnaBridge | 168:9672193075cf | 110 | * @retval None |
AnnaBridge | 168:9672193075cf | 111 | */ |
AnnaBridge | 168:9672193075cf | 112 | void SetSysClock(void) |
AnnaBridge | 168:9672193075cf | 113 | { |
AnnaBridge | 168:9672193075cf | 114 | /* 1- Try to start with HSE and external clock */ |
AnnaBridge | 168:9672193075cf | 115 | #if USE_PLL_HSE_EXTC != 0 |
AnnaBridge | 168:9672193075cf | 116 | if (SetSysClock_PLL_HSE(1) == 0) |
AnnaBridge | 168:9672193075cf | 117 | #endif |
AnnaBridge | 168:9672193075cf | 118 | { |
AnnaBridge | 168:9672193075cf | 119 | /* 2- If fail try to start with HSE and external xtal */ |
AnnaBridge | 168:9672193075cf | 120 | #if USE_PLL_HSE_XTAL != 0 |
AnnaBridge | 168:9672193075cf | 121 | if (SetSysClock_PLL_HSE(0) == 0) |
AnnaBridge | 168:9672193075cf | 122 | #endif |
AnnaBridge | 168:9672193075cf | 123 | { |
AnnaBridge | 168:9672193075cf | 124 | /* 3- If fail start with HSI clock */ |
AnnaBridge | 168:9672193075cf | 125 | if (SetSysClock_PLL_HSI() == 0) { |
AnnaBridge | 187:0387e8f68319 | 126 | while (1) { |
AnnaBridge | 168:9672193075cf | 127 | // [TODO] Put something here to tell the user that a problem occured... |
AnnaBridge | 168:9672193075cf | 128 | } |
AnnaBridge | 168:9672193075cf | 129 | } |
AnnaBridge | 168:9672193075cf | 130 | } |
AnnaBridge | 168:9672193075cf | 131 | } |
AnnaBridge | 168:9672193075cf | 132 | |
AnnaBridge | 168:9672193075cf | 133 | // Output clock on MCO2 pin(PC9) for debugging purpose |
AnnaBridge | 168:9672193075cf | 134 | #if DEBUG_MCO == 2 |
AnnaBridge | 168:9672193075cf | 135 | HAL_RCC_MCOConfig(RCC_MCO2, RCC_MCO2SOURCE_SYSCLK, RCC_MCODIV_4); // 180/4 = 45 MHz |
AnnaBridge | 168:9672193075cf | 136 | #endif |
AnnaBridge | 168:9672193075cf | 137 | } |
AnnaBridge | 168:9672193075cf | 138 | |
AnnaBridge | 168:9672193075cf | 139 | #if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0) |
AnnaBridge | 168:9672193075cf | 140 | /******************************************************************************/ |
AnnaBridge | 168:9672193075cf | 141 | /* PLL (clocked by HSE) used as System clock source */ |
AnnaBridge | 168:9672193075cf | 142 | /******************************************************************************/ |
AnnaBridge | 168:9672193075cf | 143 | uint8_t SetSysClock_PLL_HSE(uint8_t bypass) |
AnnaBridge | 168:9672193075cf | 144 | { |
AnnaBridge | 168:9672193075cf | 145 | RCC_ClkInitTypeDef RCC_ClkInitStruct; |
AnnaBridge | 168:9672193075cf | 146 | RCC_OscInitTypeDef RCC_OscInitStruct; |
AnnaBridge | 168:9672193075cf | 147 | RCC_PeriphCLKInitTypeDef PeriphClkInitStruct; |
AnnaBridge | 168:9672193075cf | 148 | |
AnnaBridge | 168:9672193075cf | 149 | /* The voltage scaling allows optimizing the power consumption when the device is |
AnnaBridge | 168:9672193075cf | 150 | clocked below the maximum system frequency, to update the voltage scaling value |
AnnaBridge | 168:9672193075cf | 151 | regarding system frequency refer to product datasheet. */ |
AnnaBridge | 168:9672193075cf | 152 | __HAL_RCC_PWR_CLK_ENABLE(); |
AnnaBridge | 168:9672193075cf | 153 | __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); |
AnnaBridge | 168:9672193075cf | 154 | |
AnnaBridge | 168:9672193075cf | 155 | // Enable HSE oscillator and activate PLL with HSE as source |
AnnaBridge | 168:9672193075cf | 156 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; |
AnnaBridge | 168:9672193075cf | 157 | if (bypass == 0) { |
AnnaBridge | 168:9672193075cf | 158 | RCC_OscInitStruct.HSEState = RCC_HSE_ON; // External 8 MHz xtal on OSC_IN/OSC_OUT |
AnnaBridge | 168:9672193075cf | 159 | } else { |
AnnaBridge | 168:9672193075cf | 160 | RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; // External 8 MHz clock on OSC_IN |
AnnaBridge | 168:9672193075cf | 161 | } |
AnnaBridge | 168:9672193075cf | 162 | |
AnnaBridge | 168:9672193075cf | 163 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; |
AnnaBridge | 168:9672193075cf | 164 | RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; |
AnnaBridge | 168:9672193075cf | 165 | RCC_OscInitStruct.PLL.PLLM = 16; // VCO input clock = 1 MHz (16 MHz / 16) |
AnnaBridge | 168:9672193075cf | 166 | RCC_OscInitStruct.PLL.PLLN = 360; // VCO output clock = 360 MHz (1 MHz * 360) |
AnnaBridge | 168:9672193075cf | 167 | RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; // PLLCLK = 180 MHz (360 MHz / 2) |
AnnaBridge | 168:9672193075cf | 168 | RCC_OscInitStruct.PLL.PLLQ = 7; // |
AnnaBridge | 168:9672193075cf | 169 | RCC_OscInitStruct.PLL.PLLR = 6; // |
AnnaBridge | 168:9672193075cf | 170 | if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { |
AnnaBridge | 168:9672193075cf | 171 | return 0; // FAIL |
AnnaBridge | 168:9672193075cf | 172 | } |
AnnaBridge | 168:9672193075cf | 173 | |
AnnaBridge | 168:9672193075cf | 174 | // Activate the OverDrive to reach the 180 MHz Frequency |
AnnaBridge | 168:9672193075cf | 175 | if (HAL_PWREx_EnableOverDrive() != HAL_OK) { |
AnnaBridge | 168:9672193075cf | 176 | return 0; // FAIL |
AnnaBridge | 168:9672193075cf | 177 | } |
AnnaBridge | 168:9672193075cf | 178 | |
AnnaBridge | 168:9672193075cf | 179 | // Select PLLSAI output as USB clock source |
AnnaBridge | 168:9672193075cf | 180 | PeriphClkInitStruct.PLLSAI.PLLSAIM = 8; |
AnnaBridge | 168:9672193075cf | 181 | PeriphClkInitStruct.PLLSAI.PLLSAIN = 384; |
AnnaBridge | 168:9672193075cf | 182 | PeriphClkInitStruct.PLLSAI.PLLSAIP = RCC_PLLSAIP_DIV8; |
AnnaBridge | 168:9672193075cf | 183 | PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_CLK48; |
AnnaBridge | 168:9672193075cf | 184 | PeriphClkInitStruct.Clk48ClockSelection = RCC_CLK48CLKSOURCE_PLLSAIP; |
AnnaBridge | 168:9672193075cf | 185 | HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct); |
AnnaBridge | 168:9672193075cf | 186 | |
AnnaBridge | 168:9672193075cf | 187 | // Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers |
AnnaBridge | 168:9672193075cf | 188 | RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2; |
AnnaBridge | 168:9672193075cf | 189 | RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; |
AnnaBridge | 168:9672193075cf | 190 | RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 180 MHz |
AnnaBridge | 168:9672193075cf | 191 | RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4; // 45 MHz |
AnnaBridge | 168:9672193075cf | 192 | RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; // 90 MHz |
AnnaBridge | 168:9672193075cf | 193 | if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK) { |
AnnaBridge | 168:9672193075cf | 194 | return 0; // FAIL |
AnnaBridge | 168:9672193075cf | 195 | } |
AnnaBridge | 168:9672193075cf | 196 | |
AnnaBridge | 168:9672193075cf | 197 | // Output clock on MCO1 pin(PA8) for debugging purpose |
AnnaBridge | 168:9672193075cf | 198 | #if DEBUG_MCO == 1 |
AnnaBridge | 187:0387e8f68319 | 199 | if (bypass == 0) { |
AnnaBridge | 187:0387e8f68319 | 200 | HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_1); // 16 MHz with xtal |
AnnaBridge | 187:0387e8f68319 | 201 | } else { |
AnnaBridge | 187:0387e8f68319 | 202 | HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_1); // xx MHz with external clock (MCO) |
AnnaBridge | 187:0387e8f68319 | 203 | } |
AnnaBridge | 168:9672193075cf | 204 | #endif |
AnnaBridge | 168:9672193075cf | 205 | |
AnnaBridge | 168:9672193075cf | 206 | return 1; // OK |
AnnaBridge | 168:9672193075cf | 207 | } |
AnnaBridge | 168:9672193075cf | 208 | #endif |
AnnaBridge | 168:9672193075cf | 209 | |
AnnaBridge | 168:9672193075cf | 210 | /******************************************************************************/ |
AnnaBridge | 168:9672193075cf | 211 | /* PLL (clocked by HSI) used as System clock source */ |
AnnaBridge | 168:9672193075cf | 212 | /******************************************************************************/ |
AnnaBridge | 168:9672193075cf | 213 | uint8_t SetSysClock_PLL_HSI(void) |
AnnaBridge | 168:9672193075cf | 214 | { |
AnnaBridge | 168:9672193075cf | 215 | RCC_ClkInitTypeDef RCC_ClkInitStruct; |
AnnaBridge | 168:9672193075cf | 216 | RCC_OscInitTypeDef RCC_OscInitStruct; |
AnnaBridge | 168:9672193075cf | 217 | |
AnnaBridge | 168:9672193075cf | 218 | /* The voltage scaling allows optimizing the power consumption when the device is |
AnnaBridge | 168:9672193075cf | 219 | clocked below the maximum system frequency, to update the voltage scaling value |
AnnaBridge | 168:9672193075cf | 220 | regarding system frequency refer to product datasheet. */ |
AnnaBridge | 168:9672193075cf | 221 | __HAL_RCC_PWR_CLK_ENABLE(); |
AnnaBridge | 168:9672193075cf | 222 | __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); |
AnnaBridge | 168:9672193075cf | 223 | |
AnnaBridge | 168:9672193075cf | 224 | // Enable HSI oscillator and activate PLL with HSI as source |
AnnaBridge | 168:9672193075cf | 225 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE; |
AnnaBridge | 168:9672193075cf | 226 | RCC_OscInitStruct.HSIState = RCC_HSI_ON; |
AnnaBridge | 168:9672193075cf | 227 | RCC_OscInitStruct.HSEState = RCC_HSE_OFF; |
AnnaBridge | 182:a56a73fd2a6f | 228 | RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT; |
AnnaBridge | 168:9672193075cf | 229 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; |
AnnaBridge | 168:9672193075cf | 230 | RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI; |
AnnaBridge | 168:9672193075cf | 231 | RCC_OscInitStruct.PLL.PLLM = 16; // VCO input clock = 1 MHz (16 MHz / 16) |
AnnaBridge | 168:9672193075cf | 232 | RCC_OscInitStruct.PLL.PLLN = 360; // VCO output clock = 360 MHz (1 MHz * 360) |
AnnaBridge | 168:9672193075cf | 233 | RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; // PLLCLK = 180 MHz (360 MHz / 2) |
AnnaBridge | 168:9672193075cf | 234 | RCC_OscInitStruct.PLL.PLLQ = 7; // |
AnnaBridge | 168:9672193075cf | 235 | RCC_OscInitStruct.PLL.PLLQ = 6; // |
AnnaBridge | 168:9672193075cf | 236 | if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { |
AnnaBridge | 168:9672193075cf | 237 | return 0; // FAIL |
AnnaBridge | 168:9672193075cf | 238 | } |
AnnaBridge | 168:9672193075cf | 239 | |
AnnaBridge | 168:9672193075cf | 240 | /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */ |
AnnaBridge | 168:9672193075cf | 241 | RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2); |
AnnaBridge | 168:9672193075cf | 242 | RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 180 MHz |
AnnaBridge | 168:9672193075cf | 243 | RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 180 MHz |
AnnaBridge | 168:9672193075cf | 244 | RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4; // 45 MHz |
AnnaBridge | 168:9672193075cf | 245 | RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; // 90 MHz |
AnnaBridge | 168:9672193075cf | 246 | if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK) { |
AnnaBridge | 168:9672193075cf | 247 | return 0; // FAIL |
AnnaBridge | 168:9672193075cf | 248 | } |
AnnaBridge | 168:9672193075cf | 249 | |
AnnaBridge | 168:9672193075cf | 250 | // Output clock on MCO1 pin(PA8) for debugging purpose |
AnnaBridge | 168:9672193075cf | 251 | #if DEBUG_MCO == 1 |
AnnaBridge | 168:9672193075cf | 252 | HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSI, RCC_MCODIV_1); // 16 MHz |
AnnaBridge | 168:9672193075cf | 253 | #endif |
AnnaBridge | 168:9672193075cf | 254 | |
AnnaBridge | 168:9672193075cf | 255 | return 1; // OK |
AnnaBridge | 168:9672193075cf | 256 | } |