mbed library sources. Supersedes mbed-src.
Dependents: Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more
targets/TARGET_STM/TARGET_STM32L0/TARGET_DISCO_L053C8/device/system_clock.c@170:19eb464bc2be, 2017-08-03 (annotated)
- Committer:
- Kojto
- Date:
- Thu Aug 03 13:13:39 2017 +0100
- Revision:
- 170:19eb464bc2be
This updates the lib to the mbed lib v 148
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Kojto | 170:19eb464bc2be | 1 | /* mbed Microcontroller Library |
Kojto | 170:19eb464bc2be | 2 | * Copyright (c) 2006-2017 ARM Limited |
Kojto | 170:19eb464bc2be | 3 | * |
Kojto | 170:19eb464bc2be | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
Kojto | 170:19eb464bc2be | 5 | * you may not use this file except in compliance with the License. |
Kojto | 170:19eb464bc2be | 6 | * You may obtain a copy of the License at |
Kojto | 170:19eb464bc2be | 7 | * |
Kojto | 170:19eb464bc2be | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
Kojto | 170:19eb464bc2be | 9 | * |
Kojto | 170:19eb464bc2be | 10 | * Unless required by applicable law or agreed to in writing, software |
Kojto | 170:19eb464bc2be | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
Kojto | 170:19eb464bc2be | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
Kojto | 170:19eb464bc2be | 13 | * See the License for the specific language governing permissions and |
Kojto | 170:19eb464bc2be | 14 | * limitations under the License. |
Kojto | 170:19eb464bc2be | 15 | */ |
Kojto | 170:19eb464bc2be | 16 | |
Kojto | 170:19eb464bc2be | 17 | /** |
Kojto | 170:19eb464bc2be | 18 | * This file configures the system clock as follows: |
Kojto | 170:19eb464bc2be | 19 | *----------------------------------------------------------------- |
Kojto | 170:19eb464bc2be | 20 | * System clock source | 1- USE_PLL_HSE_EXTC (external 8 MHz clock) |
Kojto | 170:19eb464bc2be | 21 | * | 2- USE_PLL_HSE_XTAL (external 8 MHz xtal) |
Kojto | 170:19eb464bc2be | 22 | * | 3- USE_PLL_HSI (internal 16 MHz) |
Kojto | 170:19eb464bc2be | 23 | *----------------------------------------------------------------- |
Kojto | 170:19eb464bc2be | 24 | * SYSCLK(MHz) | 32 |
Kojto | 170:19eb464bc2be | 25 | * AHBCLK (MHz) | 32 |
Kojto | 170:19eb464bc2be | 26 | * APB1CLK (MHz) | 32 |
Kojto | 170:19eb464bc2be | 27 | * USB capable | YES |
Kojto | 170:19eb464bc2be | 28 | *----------------------------------------------------------------- |
Kojto | 170:19eb464bc2be | 29 | */ |
Kojto | 170:19eb464bc2be | 30 | |
Kojto | 170:19eb464bc2be | 31 | #include "stm32l0xx.h" |
Kojto | 170:19eb464bc2be | 32 | #include "mbed_assert.h" |
Kojto | 170:19eb464bc2be | 33 | |
Kojto | 170:19eb464bc2be | 34 | /*!< Uncomment the following line if you need to relocate your vector Table in |
Kojto | 170:19eb464bc2be | 35 | Internal SRAM. */ |
Kojto | 170:19eb464bc2be | 36 | /* #define VECT_TAB_SRAM */ |
Kojto | 170:19eb464bc2be | 37 | #define VECT_TAB_OFFSET 0x00U /*!< Vector Table base offset field. |
Kojto | 170:19eb464bc2be | 38 | This value must be a multiple of 0x100. */ |
Kojto | 170:19eb464bc2be | 39 | |
Kojto | 170:19eb464bc2be | 40 | #define USE_PLL_HSE_EXTC 0x8 // Use external clock (ST Link MCO) |
Kojto | 170:19eb464bc2be | 41 | #define USE_PLL_HSE_XTAL 0x4 // Use external xtal (X3 on board - not provided by default) |
Kojto | 170:19eb464bc2be | 42 | #define USE_PLL_HSI 0x2 // Use HSI internal clock |
Kojto | 170:19eb464bc2be | 43 | |
Kojto | 170:19eb464bc2be | 44 | #if ( ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) ) |
Kojto | 170:19eb464bc2be | 45 | uint8_t SetSysClock_PLL_HSE(uint8_t bypass); |
Kojto | 170:19eb464bc2be | 46 | #endif /* ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) */ |
Kojto | 170:19eb464bc2be | 47 | |
Kojto | 170:19eb464bc2be | 48 | #if ((CLOCK_SOURCE) & USE_PLL_HSI) |
Kojto | 170:19eb464bc2be | 49 | uint8_t SetSysClock_PLL_HSI(void); |
Kojto | 170:19eb464bc2be | 50 | #endif /* ((CLOCK_SOURCE) & USE_PLL_HSI) */ |
Kojto | 170:19eb464bc2be | 51 | |
Kojto | 170:19eb464bc2be | 52 | |
Kojto | 170:19eb464bc2be | 53 | /** |
Kojto | 170:19eb464bc2be | 54 | * @brief Setup the microcontroller system. |
Kojto | 170:19eb464bc2be | 55 | * @param None |
Kojto | 170:19eb464bc2be | 56 | * @retval None |
Kojto | 170:19eb464bc2be | 57 | */ |
Kojto | 170:19eb464bc2be | 58 | void SystemInit (void) |
Kojto | 170:19eb464bc2be | 59 | { |
Kojto | 170:19eb464bc2be | 60 | /*!< Set MSION bit */ |
Kojto | 170:19eb464bc2be | 61 | RCC->CR |= (uint32_t)0x00000100U; |
Kojto | 170:19eb464bc2be | 62 | |
Kojto | 170:19eb464bc2be | 63 | /*!< Reset SW[1:0], HPRE[3:0], PPRE1[2:0], PPRE2[2:0], MCOSEL[2:0] and MCOPRE[2:0] bits */ |
Kojto | 170:19eb464bc2be | 64 | RCC->CFGR &= (uint32_t) 0x88FF400CU; |
Kojto | 170:19eb464bc2be | 65 | |
Kojto | 170:19eb464bc2be | 66 | /*!< Reset HSION, HSIDIVEN, HSEON, CSSON and PLLON bits */ |
Kojto | 170:19eb464bc2be | 67 | RCC->CR &= (uint32_t)0xFEF6FFF6U; |
Kojto | 170:19eb464bc2be | 68 | |
Kojto | 170:19eb464bc2be | 69 | /*!< Reset HSI48ON bit */ |
Kojto | 170:19eb464bc2be | 70 | RCC->CRRCR &= (uint32_t)0xFFFFFFFEU; |
Kojto | 170:19eb464bc2be | 71 | |
Kojto | 170:19eb464bc2be | 72 | /*!< Reset HSEBYP bit */ |
Kojto | 170:19eb464bc2be | 73 | RCC->CR &= (uint32_t)0xFFFBFFFFU; |
Kojto | 170:19eb464bc2be | 74 | |
Kojto | 170:19eb464bc2be | 75 | /*!< Reset PLLSRC, PLLMUL[3:0] and PLLDIV[1:0] bits */ |
Kojto | 170:19eb464bc2be | 76 | RCC->CFGR &= (uint32_t)0xFF02FFFFU; |
Kojto | 170:19eb464bc2be | 77 | |
Kojto | 170:19eb464bc2be | 78 | /*!< Disable all interrupts */ |
Kojto | 170:19eb464bc2be | 79 | RCC->CIER = 0x00000000U; |
Kojto | 170:19eb464bc2be | 80 | |
Kojto | 170:19eb464bc2be | 81 | /* Configure the Vector Table location add offset address ------------------*/ |
Kojto | 170:19eb464bc2be | 82 | #ifdef VECT_TAB_SRAM |
Kojto | 170:19eb464bc2be | 83 | SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */ |
Kojto | 170:19eb464bc2be | 84 | #else |
Kojto | 170:19eb464bc2be | 85 | SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */ |
Kojto | 170:19eb464bc2be | 86 | #endif |
Kojto | 170:19eb464bc2be | 87 | |
Kojto | 170:19eb464bc2be | 88 | } |
Kojto | 170:19eb464bc2be | 89 | |
Kojto | 170:19eb464bc2be | 90 | /** |
Kojto | 170:19eb464bc2be | 91 | * @brief Configures the System clock source, PLL Multiplier and Divider factors, |
Kojto | 170:19eb464bc2be | 92 | * AHB/APBx prescalers and Flash settings |
Kojto | 170:19eb464bc2be | 93 | * @note This function should be called only once the RCC clock configuration |
Kojto | 170:19eb464bc2be | 94 | * is reset to the default reset state (done in SystemInit() function). |
Kojto | 170:19eb464bc2be | 95 | * @param None |
Kojto | 170:19eb464bc2be | 96 | * @retval None |
Kojto | 170:19eb464bc2be | 97 | */ |
Kojto | 170:19eb464bc2be | 98 | void SetSysClock(void) |
Kojto | 170:19eb464bc2be | 99 | { |
Kojto | 170:19eb464bc2be | 100 | #if ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) |
Kojto | 170:19eb464bc2be | 101 | /* 1- Try to start with HSE and external clock */ |
Kojto | 170:19eb464bc2be | 102 | if (SetSysClock_PLL_HSE(1) == 0) |
Kojto | 170:19eb464bc2be | 103 | #endif |
Kojto | 170:19eb464bc2be | 104 | { |
Kojto | 170:19eb464bc2be | 105 | #if ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) |
Kojto | 170:19eb464bc2be | 106 | /* 2- If fail try to start with HSE and external xtal */ |
Kojto | 170:19eb464bc2be | 107 | if (SetSysClock_PLL_HSE(0) == 0) |
Kojto | 170:19eb464bc2be | 108 | #endif |
Kojto | 170:19eb464bc2be | 109 | { |
Kojto | 170:19eb464bc2be | 110 | #if ((CLOCK_SOURCE) & USE_PLL_HSI) |
Kojto | 170:19eb464bc2be | 111 | /* 3- If fail start with HSI clock */ |
Kojto | 170:19eb464bc2be | 112 | if (SetSysClock_PLL_HSI() == 0) |
Kojto | 170:19eb464bc2be | 113 | #endif |
Kojto | 170:19eb464bc2be | 114 | { |
Kojto | 170:19eb464bc2be | 115 | while(1) { |
Kojto | 170:19eb464bc2be | 116 | MBED_ASSERT(1); |
Kojto | 170:19eb464bc2be | 117 | } |
Kojto | 170:19eb464bc2be | 118 | } |
Kojto | 170:19eb464bc2be | 119 | } |
Kojto | 170:19eb464bc2be | 120 | } |
Kojto | 170:19eb464bc2be | 121 | |
Kojto | 170:19eb464bc2be | 122 | /* Output clock on MCO1 pin(PA8) for debugging purpose */ |
Kojto | 170:19eb464bc2be | 123 | //HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_SYSCLK, RCC_MCODIV_1); |
Kojto | 170:19eb464bc2be | 124 | //HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSI48, RCC_MCODIV_1); |
Kojto | 170:19eb464bc2be | 125 | } |
Kojto | 170:19eb464bc2be | 126 | |
Kojto | 170:19eb464bc2be | 127 | #if ( ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) ) |
Kojto | 170:19eb464bc2be | 128 | /******************************************************************************/ |
Kojto | 170:19eb464bc2be | 129 | /* PLL (clocked by HSE) used as System clock source */ |
Kojto | 170:19eb464bc2be | 130 | /******************************************************************************/ |
Kojto | 170:19eb464bc2be | 131 | uint8_t SetSysClock_PLL_HSE(uint8_t bypass) |
Kojto | 170:19eb464bc2be | 132 | { |
Kojto | 170:19eb464bc2be | 133 | RCC_ClkInitTypeDef RCC_ClkInitStruct; |
Kojto | 170:19eb464bc2be | 134 | RCC_OscInitTypeDef RCC_OscInitStruct; |
Kojto | 170:19eb464bc2be | 135 | |
Kojto | 170:19eb464bc2be | 136 | /* Used to gain time after DeepSleep in case HSI is used */ |
Kojto | 170:19eb464bc2be | 137 | if (__HAL_RCC_GET_FLAG(RCC_FLAG_HSIRDY) != RESET) { |
Kojto | 170:19eb464bc2be | 138 | return 0; |
Kojto | 170:19eb464bc2be | 139 | } |
Kojto | 170:19eb464bc2be | 140 | |
Kojto | 170:19eb464bc2be | 141 | /* The voltage scaling allows optimizing the power consumption when the device is |
Kojto | 170:19eb464bc2be | 142 | clocked below the maximum system frequency, to update the voltage scaling value |
Kojto | 170:19eb464bc2be | 143 | regarding system frequency refer to product datasheet. */ |
Kojto | 170:19eb464bc2be | 144 | __PWR_CLK_ENABLE(); |
Kojto | 170:19eb464bc2be | 145 | __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); |
Kojto | 170:19eb464bc2be | 146 | |
Kojto | 170:19eb464bc2be | 147 | /* Enable HSE and HSI48 oscillators and activate PLL with HSE as source */ |
Kojto | 170:19eb464bc2be | 148 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_HSI48; |
Kojto | 170:19eb464bc2be | 149 | if (bypass == 0) { |
Kojto | 170:19eb464bc2be | 150 | RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */ |
Kojto | 170:19eb464bc2be | 151 | } else { |
Kojto | 170:19eb464bc2be | 152 | RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; /* External 8 MHz clock on OSC_IN */ |
Kojto | 170:19eb464bc2be | 153 | } |
Kojto | 170:19eb464bc2be | 154 | RCC_OscInitStruct.HSIState = RCC_HSI_OFF; |
Kojto | 170:19eb464bc2be | 155 | RCC_OscInitStruct.HSI48State = RCC_HSI48_ON; /* For USB and RNG clock */ |
Kojto | 170:19eb464bc2be | 156 | // PLLCLK = (8 MHz * 8)/2 = 32 MHz |
Kojto | 170:19eb464bc2be | 157 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; |
Kojto | 170:19eb464bc2be | 158 | RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; |
Kojto | 170:19eb464bc2be | 159 | RCC_OscInitStruct.PLL.PLLMUL = RCC_PLLMUL_8; |
Kojto | 170:19eb464bc2be | 160 | RCC_OscInitStruct.PLL.PLLDIV = RCC_PLLDIV_2; |
Kojto | 170:19eb464bc2be | 161 | if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { |
Kojto | 170:19eb464bc2be | 162 | return 0; // FAIL |
Kojto | 170:19eb464bc2be | 163 | } |
Kojto | 170:19eb464bc2be | 164 | |
Kojto | 170:19eb464bc2be | 165 | /* Select HSI48 as USB clock source */ |
Kojto | 170:19eb464bc2be | 166 | RCC_PeriphCLKInitTypeDef PeriphClkInitStruct; |
Kojto | 170:19eb464bc2be | 167 | PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_USB; |
Kojto | 170:19eb464bc2be | 168 | PeriphClkInitStruct.UsbClockSelection = RCC_USBCLKSOURCE_HSI48; |
Kojto | 170:19eb464bc2be | 169 | if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK) { |
Kojto | 170:19eb464bc2be | 170 | return 0; // FAIL |
Kojto | 170:19eb464bc2be | 171 | } |
Kojto | 170:19eb464bc2be | 172 | |
Kojto | 170:19eb464bc2be | 173 | /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */ |
Kojto | 170:19eb464bc2be | 174 | RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2); |
Kojto | 170:19eb464bc2be | 175 | RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 32 MHz |
Kojto | 170:19eb464bc2be | 176 | RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 32 MHz |
Kojto | 170:19eb464bc2be | 177 | RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; // 32 MHz |
Kojto | 170:19eb464bc2be | 178 | RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 32 MHz |
Kojto | 170:19eb464bc2be | 179 | if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) { |
Kojto | 170:19eb464bc2be | 180 | return 0; // FAIL |
Kojto | 170:19eb464bc2be | 181 | } |
Kojto | 170:19eb464bc2be | 182 | |
Kojto | 170:19eb464bc2be | 183 | /* Output clock on MCO1 pin(PA8) for debugging purpose */ |
Kojto | 170:19eb464bc2be | 184 | //if (bypass == 0) |
Kojto | 170:19eb464bc2be | 185 | // HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_2); // 4 MHz |
Kojto | 170:19eb464bc2be | 186 | //else |
Kojto | 170:19eb464bc2be | 187 | // HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_1); // 8 MHz |
Kojto | 170:19eb464bc2be | 188 | |
Kojto | 170:19eb464bc2be | 189 | return 1; // OK |
Kojto | 170:19eb464bc2be | 190 | } |
Kojto | 170:19eb464bc2be | 191 | #endif /* ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) */ |
Kojto | 170:19eb464bc2be | 192 | |
Kojto | 170:19eb464bc2be | 193 | #if ((CLOCK_SOURCE) & USE_PLL_HSI) |
Kojto | 170:19eb464bc2be | 194 | /******************************************************************************/ |
Kojto | 170:19eb464bc2be | 195 | /* PLL (clocked by HSI) used as System clock source */ |
Kojto | 170:19eb464bc2be | 196 | /******************************************************************************/ |
Kojto | 170:19eb464bc2be | 197 | uint8_t SetSysClock_PLL_HSI(void) |
Kojto | 170:19eb464bc2be | 198 | { |
Kojto | 170:19eb464bc2be | 199 | RCC_ClkInitTypeDef RCC_ClkInitStruct; |
Kojto | 170:19eb464bc2be | 200 | RCC_OscInitTypeDef RCC_OscInitStruct; |
Kojto | 170:19eb464bc2be | 201 | RCC_PeriphCLKInitTypeDef RCC_PeriphClkInit; |
Kojto | 170:19eb464bc2be | 202 | |
Kojto | 170:19eb464bc2be | 203 | /* The voltage scaling allows optimizing the power consumption when the device is |
Kojto | 170:19eb464bc2be | 204 | clocked below the maximum system frequency, to update the voltage scaling value |
Kojto | 170:19eb464bc2be | 205 | regarding system frequency refer to product datasheet. */ |
Kojto | 170:19eb464bc2be | 206 | __PWR_CLK_ENABLE(); |
Kojto | 170:19eb464bc2be | 207 | __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); |
Kojto | 170:19eb464bc2be | 208 | |
Kojto | 170:19eb464bc2be | 209 | /* Enable HSI and HSI48 oscillators and activate PLL with HSI as source */ |
Kojto | 170:19eb464bc2be | 210 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSI48; |
Kojto | 170:19eb464bc2be | 211 | RCC_OscInitStruct.HSEState = RCC_HSE_OFF; |
Kojto | 170:19eb464bc2be | 212 | RCC_OscInitStruct.HSIState = RCC_HSI_ON; |
Kojto | 170:19eb464bc2be | 213 | RCC_OscInitStruct.HSICalibrationValue = 16; |
Kojto | 170:19eb464bc2be | 214 | RCC_OscInitStruct.HSI48State = RCC_HSI48_ON; /* For USB and RNG clock */ |
Kojto | 170:19eb464bc2be | 215 | // PLLCLK = (16 MHz * 4)/2 = 32 MHz |
Kojto | 170:19eb464bc2be | 216 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; |
Kojto | 170:19eb464bc2be | 217 | RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI; |
Kojto | 170:19eb464bc2be | 218 | RCC_OscInitStruct.PLL.PLLMUL = RCC_PLLMUL_4; |
Kojto | 170:19eb464bc2be | 219 | RCC_OscInitStruct.PLL.PLLDIV = RCC_PLLDIV_2; |
Kojto | 170:19eb464bc2be | 220 | if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { |
Kojto | 170:19eb464bc2be | 221 | return 0; // FAIL |
Kojto | 170:19eb464bc2be | 222 | } |
Kojto | 170:19eb464bc2be | 223 | |
Kojto | 170:19eb464bc2be | 224 | /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */ |
Kojto | 170:19eb464bc2be | 225 | RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2); |
Kojto | 170:19eb464bc2be | 226 | RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 32 MHz |
Kojto | 170:19eb464bc2be | 227 | RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 32 MHz |
Kojto | 170:19eb464bc2be | 228 | RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; // 32 MHz |
Kojto | 170:19eb464bc2be | 229 | RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 32 MHz |
Kojto | 170:19eb464bc2be | 230 | if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) { |
Kojto | 170:19eb464bc2be | 231 | return 0; // FAIL |
Kojto | 170:19eb464bc2be | 232 | } |
Kojto | 170:19eb464bc2be | 233 | |
Kojto | 170:19eb464bc2be | 234 | RCC_PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB; |
Kojto | 170:19eb464bc2be | 235 | RCC_PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_HSI48; |
Kojto | 170:19eb464bc2be | 236 | if (HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphClkInit) != HAL_OK) { |
Kojto | 170:19eb464bc2be | 237 | return 0; // FAIL |
Kojto | 170:19eb464bc2be | 238 | } |
Kojto | 170:19eb464bc2be | 239 | |
Kojto | 170:19eb464bc2be | 240 | /* Output clock on MCO1 pin(PA8) for debugging purpose */ |
Kojto | 170:19eb464bc2be | 241 | //HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSI, RCC_MCODIV_1); // 16 MHz |
Kojto | 170:19eb464bc2be | 242 | |
Kojto | 170:19eb464bc2be | 243 | return 1; // OK |
Kojto | 170:19eb464bc2be | 244 | } |
Kojto | 170:19eb464bc2be | 245 | #endif /* ((CLOCK_SOURCE) & USE_PLL_HSI) */ |