Thomas Lyp / DevLibMemoryController

Initial commit

Dependencies:   FastPWM

mbed-dev-master/targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F412xG/TARGET_NUCLEO_F412ZG/system_clock.c@0:bb348c97df44, 2020-09-16 (annotated)

Committer:
lypinator
Date:
Wed Sep 16 01:11:49 2020 +0000
Revision:
0:bb348c97df44
Added PWM

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lypinator 0:bb348c97df44 1 /* mbed Microcontroller Library
lypinator 0:bb348c97df44 2 * Copyright (c) 2006-2017 ARM Limited
lypinator 0:bb348c97df44 3 *
lypinator 0:bb348c97df44 4 * Licensed under the Apache License, Version 2.0 (the "License");
lypinator 0:bb348c97df44 5 * you may not use this file except in compliance with the License.
lypinator 0:bb348c97df44 6 * You may obtain a copy of the License at
lypinator 0:bb348c97df44 7 *
lypinator 0:bb348c97df44 8 * http://www.apache.org/licenses/LICENSE-2.0
lypinator 0:bb348c97df44 9 *
lypinator 0:bb348c97df44 10 * Unless required by applicable law or agreed to in writing, software
lypinator 0:bb348c97df44 11 * distributed under the License is distributed on an "AS IS" BASIS,
lypinator 0:bb348c97df44 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
lypinator 0:bb348c97df44 13 * See the License for the specific language governing permissions and
lypinator 0:bb348c97df44 14 * limitations under the License.
lypinator 0:bb348c97df44 15 */
lypinator 0:bb348c97df44 16
lypinator 0:bb348c97df44 17 /**
lypinator 0:bb348c97df44 18 * This file configures the system clock as follows:
lypinator 0:bb348c97df44 19 *-----------------------------------------------------------------------------
lypinator 0:bb348c97df44 20 * System clock source | 1- USE_PLL_HSE_EXTC (external 8 MHz clock)
lypinator 0:bb348c97df44 21 * | 2- USE_PLL_HSE_XTAL (external 8 MHz xtal)
lypinator 0:bb348c97df44 22 * | 3- USE_PLL_HSI (internal 16 MHz)
lypinator 0:bb348c97df44 23 *-----------------------------------------------------------------------------
lypinator 0:bb348c97df44 24 * SYSCLK(MHz) | 100
lypinator 0:bb348c97df44 25 * AHBCLK (MHz) | 100
lypinator 0:bb348c97df44 26 * APB1CLK (MHz) | 50
lypinator 0:bb348c97df44 27 * APB2CLK (MHz) | 100
lypinator 0:bb348c97df44 28 * USB capable | YES
lypinator 0:bb348c97df44 29 *-----------------------------------------------------------------------------
lypinator 0:bb348c97df44 30 **/
lypinator 0:bb348c97df44 31
lypinator 0:bb348c97df44 32 #include "stm32f4xx.h"
lypinator 0:bb348c97df44 33 #include "nvic_addr.h"
lypinator 0:bb348c97df44 34 #include "mbed_error.h"
lypinator 0:bb348c97df44 35
lypinator 0:bb348c97df44 36 /*!< Uncomment the following line if you need to relocate your vector Table in
lypinator 0:bb348c97df44 37 Internal SRAM. */
lypinator 0:bb348c97df44 38 /* #define VECT_TAB_SRAM */
lypinator 0:bb348c97df44 39 #define VECT_TAB_OFFSET 0x00 /*!< Vector Table base offset field.
lypinator 0:bb348c97df44 40 This value must be a multiple of 0x200. */
lypinator 0:bb348c97df44 41
lypinator 0:bb348c97df44 42
lypinator 0:bb348c97df44 43 // clock source is selected with CLOCK_SOURCE in json config
lypinator 0:bb348c97df44 44 #define USE_PLL_HSE_EXTC 0x8 // Use external clock (ST Link MCO)
lypinator 0:bb348c97df44 45 #define USE_PLL_HSE_XTAL 0x4 // Use external xtal (X3 on board - not provided by default)
lypinator 0:bb348c97df44 46 #define USE_PLL_HSI 0x2 // Use HSI internal clock
lypinator 0:bb348c97df44 47
lypinator 0:bb348c97df44 48 #if ( ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) )
lypinator 0:bb348c97df44 49 uint8_t SetSysClock_PLL_HSE(uint8_t bypass);
lypinator 0:bb348c97df44 50 #endif /* ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) */
lypinator 0:bb348c97df44 51
lypinator 0:bb348c97df44 52 #if ((CLOCK_SOURCE) & USE_PLL_HSI)
lypinator 0:bb348c97df44 53 uint8_t SetSysClock_PLL_HSI(void);
lypinator 0:bb348c97df44 54 #endif /* ((CLOCK_SOURCE) & USE_PLL_HSI) */
lypinator 0:bb348c97df44 55
lypinator 0:bb348c97df44 56 /**
lypinator 0:bb348c97df44 57 * @brief Setup the microcontroller system
lypinator 0:bb348c97df44 58 * Initialize the FPU setting, vector table location and External memory
lypinator 0:bb348c97df44 59 * configuration.
lypinator 0:bb348c97df44 60 * @param None
lypinator 0:bb348c97df44 61 * @retval None
lypinator 0:bb348c97df44 62 */
lypinator 0:bb348c97df44 63 void SystemInit(void)
lypinator 0:bb348c97df44 64 {
lypinator 0:bb348c97df44 65 /* FPU settings ------------------------------------------------------------*/
lypinator 0:bb348c97df44 66 #if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
lypinator 0:bb348c97df44 67 SCB->CPACR |= ((3UL << 10 * 2) | (3UL << 11 * 2)); /* set CP10 and CP11 Full Access */
lypinator 0:bb348c97df44 68 #endif
lypinator 0:bb348c97df44 69 /* Reset the RCC clock configuration to the default reset state ------------*/
lypinator 0:bb348c97df44 70 /* Set HSION bit */
lypinator 0:bb348c97df44 71 RCC->CR |= (uint32_t)0x00000001;
lypinator 0:bb348c97df44 72
lypinator 0:bb348c97df44 73 /* Reset CFGR register */
lypinator 0:bb348c97df44 74 RCC->CFGR = 0x00000000;
lypinator 0:bb348c97df44 75
lypinator 0:bb348c97df44 76 /* Reset HSEON, CSSON and PLLON bits */
lypinator 0:bb348c97df44 77 RCC->CR &= (uint32_t)0xFEF6FFFF;
lypinator 0:bb348c97df44 78
lypinator 0:bb348c97df44 79 /* Reset PLLCFGR register */
lypinator 0:bb348c97df44 80 RCC->PLLCFGR = 0x24003010;
lypinator 0:bb348c97df44 81
lypinator 0:bb348c97df44 82 /* Reset HSEBYP bit */
lypinator 0:bb348c97df44 83 RCC->CR &= (uint32_t)0xFFFBFFFF;
lypinator 0:bb348c97df44 84
lypinator 0:bb348c97df44 85 /* Disable all interrupts */
lypinator 0:bb348c97df44 86 RCC->CIR = 0x00000000;
lypinator 0:bb348c97df44 87
lypinator 0:bb348c97df44 88 #if defined (DATA_IN_ExtSRAM) || defined (DATA_IN_ExtSDRAM)
lypinator 0:bb348c97df44 89 SystemInit_ExtMemCtl();
lypinator 0:bb348c97df44 90 #endif /* DATA_IN_ExtSRAM || DATA_IN_ExtSDRAM */
lypinator 0:bb348c97df44 91
lypinator 0:bb348c97df44 92 /* Configure the Vector Table location add offset address ------------------*/
lypinator 0:bb348c97df44 93 #ifdef VECT_TAB_SRAM
lypinator 0:bb348c97df44 94 SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
lypinator 0:bb348c97df44 95 #else
lypinator 0:bb348c97df44 96 SCB->VTOR = NVIC_FLASH_VECTOR_ADDRESS; /* Vector Table Relocation in Internal FLASH */
lypinator 0:bb348c97df44 97 #endif
lypinator 0:bb348c97df44 98
lypinator 0:bb348c97df44 99 }
lypinator 0:bb348c97df44 100
lypinator 0:bb348c97df44 101
lypinator 0:bb348c97df44 102 /**
lypinator 0:bb348c97df44 103 * @brief Configures the System clock source, PLL Multiplier and Divider factors,
lypinator 0:bb348c97df44 104 * AHB/APBx prescalers and Flash settings
lypinator 0:bb348c97df44 105 * @note This function should be called only once the RCC clock configuration
lypinator 0:bb348c97df44 106 * is reset to the default reset state (done in SystemInit() function).
lypinator 0:bb348c97df44 107 * @param None
lypinator 0:bb348c97df44 108 * @retval None
lypinator 0:bb348c97df44 109 */
lypinator 0:bb348c97df44 110
lypinator 0:bb348c97df44 111 void SetSysClock(void)
lypinator 0:bb348c97df44 112 {
lypinator 0:bb348c97df44 113 #if ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC)
lypinator 0:bb348c97df44 114 /* 1- Try to start with HSE and external clock */
lypinator 0:bb348c97df44 115 if (SetSysClock_PLL_HSE(1) == 0)
lypinator 0:bb348c97df44 116 #endif
lypinator 0:bb348c97df44 117 {
lypinator 0:bb348c97df44 118 #if ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL)
lypinator 0:bb348c97df44 119 /* 2- If fail try to start with HSE and external xtal */
lypinator 0:bb348c97df44 120 if (SetSysClock_PLL_HSE(0) == 0)
lypinator 0:bb348c97df44 121 #endif
lypinator 0:bb348c97df44 122 {
lypinator 0:bb348c97df44 123 #if ((CLOCK_SOURCE) & USE_PLL_HSI)
lypinator 0:bb348c97df44 124 /* 3- If fail start with HSI clock */
lypinator 0:bb348c97df44 125 if (SetSysClock_PLL_HSI() == 0)
lypinator 0:bb348c97df44 126 #endif
lypinator 0:bb348c97df44 127 {
lypinator 0:bb348c97df44 128 {
lypinator 0:bb348c97df44 129 error("SetSysClock failed\n");
lypinator 0:bb348c97df44 130 }
lypinator 0:bb348c97df44 131 }
lypinator 0:bb348c97df44 132 }
lypinator 0:bb348c97df44 133 }
lypinator 0:bb348c97df44 134
lypinator 0:bb348c97df44 135 /* Output clock on MCO2 pin(PC9) for debugging purpose */
lypinator 0:bb348c97df44 136 //HAL_RCC_MCOConfig(RCC_MCO2, RCC_MCO2SOURCE_SYSCLK, RCC_MCODIV_4);
lypinator 0:bb348c97df44 137 }
lypinator 0:bb348c97df44 138
lypinator 0:bb348c97df44 139 #if ( ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) )
lypinator 0:bb348c97df44 140 /******************************************************************************/
lypinator 0:bb348c97df44 141 /* PLL (clocked by HSE) used as System clock source */
lypinator 0:bb348c97df44 142 /******************************************************************************/
lypinator 0:bb348c97df44 143 uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
lypinator 0:bb348c97df44 144 {
lypinator 0:bb348c97df44 145 RCC_OscInitTypeDef RCC_OscInitStruct;
lypinator 0:bb348c97df44 146 RCC_ClkInitTypeDef RCC_ClkInitStruct;
lypinator 0:bb348c97df44 147 RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;
lypinator 0:bb348c97df44 148
lypinator 0:bb348c97df44 149 /* Enable Power Control clock */
lypinator 0:bb348c97df44 150 __HAL_RCC_PWR_CLK_ENABLE();
lypinator 0:bb348c97df44 151
lypinator 0:bb348c97df44 152 /* The voltage scaling allows optimizing the power consumption when the device is
lypinator 0:bb348c97df44 153 clocked below the maximum system frequency, to update the voltage scaling value
lypinator 0:bb348c97df44 154 regarding system frequency refer to product datasheet. */
lypinator 0:bb348c97df44 155 __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
lypinator 0:bb348c97df44 156
lypinator 0:bb348c97df44 157 /* Enable HSE oscillator and activate PLL with HSE as source */
lypinator 0:bb348c97df44 158 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
lypinator 0:bb348c97df44 159 if (bypass == 0) {
lypinator 0:bb348c97df44 160 RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
lypinator 0:bb348c97df44 161 } else {
lypinator 0:bb348c97df44 162 RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; /* External 8 MHz clock on OSC_IN */
lypinator 0:bb348c97df44 163 }
lypinator 0:bb348c97df44 164
lypinator 0:bb348c97df44 165 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
lypinator 0:bb348c97df44 166 RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
lypinator 0:bb348c97df44 167
lypinator 0:bb348c97df44 168 RCC_OscInitStruct.PLL.PLLM = 8; // VCO input clock = 1 MHz (8 MHz / 8)
lypinator 0:bb348c97df44 169 RCC_OscInitStruct.PLL.PLLN = 200; // VCO output clock = 200 MHz (1 MHz * 200)
lypinator 0:bb348c97df44 170 RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; // PLLCLK = 100 MHz (200 MHz / 2)
lypinator 0:bb348c97df44 171 RCC_OscInitStruct.PLL.PLLQ = 7;
lypinator 0:bb348c97df44 172 RCC_OscInitStruct.PLL.PLLR = 2;
lypinator 0:bb348c97df44 173
lypinator 0:bb348c97df44 174 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
lypinator 0:bb348c97df44 175 return 0; // FAIL
lypinator 0:bb348c97df44 176 }
lypinator 0:bb348c97df44 177
lypinator 0:bb348c97df44 178 /* Select PLLSAI output as USB clock source */
lypinator 0:bb348c97df44 179 PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_CLK48;
lypinator 0:bb348c97df44 180 PeriphClkInitStruct.PLLI2S.PLLI2SM = 8;
lypinator 0:bb348c97df44 181 PeriphClkInitStruct.PLLI2S.PLLI2SQ = 4;
lypinator 0:bb348c97df44 182 PeriphClkInitStruct.PLLI2S.PLLI2SN = 192;
lypinator 0:bb348c97df44 183 PeriphClkInitStruct.PLLI2S.PLLI2SR = 2;
lypinator 0:bb348c97df44 184 PeriphClkInitStruct.Clk48ClockSelection = RCC_CLK48CLKSOURCE_PLLI2SQ;
lypinator 0:bb348c97df44 185 PeriphClkInitStruct.PLLI2SSelection = RCC_PLLI2SCLKSOURCE_PLLSRC;
lypinator 0:bb348c97df44 186
lypinator 0:bb348c97df44 187 HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);
lypinator 0:bb348c97df44 188
lypinator 0:bb348c97df44 189 /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
lypinator 0:bb348c97df44 190 RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
lypinator 0:bb348c97df44 191 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
lypinator 0:bb348c97df44 192 RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
lypinator 0:bb348c97df44 193 RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
lypinator 0:bb348c97df44 194 RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
lypinator 0:bb348c97df44 195
lypinator 0:bb348c97df44 196 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK) {
lypinator 0:bb348c97df44 197 return 0; // FAIL
lypinator 0:bb348c97df44 198 }
lypinator 0:bb348c97df44 199
lypinator 0:bb348c97df44 200 /* Output clock on MCO1 pin(PA8) for debugging purpose */
lypinator 0:bb348c97df44 201 //if (bypass == 0)
lypinator 0:bb348c97df44 202 // HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_2); // 4 MHz with xtal
lypinator 0:bb348c97df44 203 //else
lypinator 0:bb348c97df44 204 // HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_1); // 8 MHz with external clock
lypinator 0:bb348c97df44 205
lypinator 0:bb348c97df44 206 return 1; // OK
lypinator 0:bb348c97df44 207 }
lypinator 0:bb348c97df44 208 #endif /* ((CLOCK_SOURCE) & USE_PLL_HSE_XTAL) || ((CLOCK_SOURCE) & USE_PLL_HSE_EXTC) */
lypinator 0:bb348c97df44 209
lypinator 0:bb348c97df44 210 #if ((CLOCK_SOURCE) & USE_PLL_HSI)
lypinator 0:bb348c97df44 211 /******************************************************************************/
lypinator 0:bb348c97df44 212 /* PLL (clocked by HSI) used as System clock source */
lypinator 0:bb348c97df44 213 /******************************************************************************/
lypinator 0:bb348c97df44 214 uint8_t SetSysClock_PLL_HSI(void)
lypinator 0:bb348c97df44 215 {
lypinator 0:bb348c97df44 216 RCC_OscInitTypeDef RCC_OscInitStruct;
lypinator 0:bb348c97df44 217 RCC_ClkInitTypeDef RCC_ClkInitStruct;
lypinator 0:bb348c97df44 218 RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;
lypinator 0:bb348c97df44 219
lypinator 0:bb348c97df44 220 /* Enable Power Control clock */
lypinator 0:bb348c97df44 221 __HAL_RCC_PWR_CLK_ENABLE();
lypinator 0:bb348c97df44 222
lypinator 0:bb348c97df44 223 /* The voltage scaling allows optimizing the power consumption when the device is
lypinator 0:bb348c97df44 224 clocked below the maximum system frequency, to update the voltage scaling value
lypinator 0:bb348c97df44 225 regarding system frequency refer to product datasheet. */
lypinator 0:bb348c97df44 226 __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
lypinator 0:bb348c97df44 227
lypinator 0:bb348c97df44 228 /* Enable HSI oscillator and activate PLL with HSI as source */
lypinator 0:bb348c97df44 229 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
lypinator 0:bb348c97df44 230 RCC_OscInitStruct.HSIState = RCC_HSI_ON;
lypinator 0:bb348c97df44 231 RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
lypinator 0:bb348c97df44 232 RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
lypinator 0:bb348c97df44 233 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
lypinator 0:bb348c97df44 234 RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
lypinator 0:bb348c97df44 235 RCC_OscInitStruct.PLL.PLLM = 8; // VCO input clock = 2 MHz (16 MHz / 8)
lypinator 0:bb348c97df44 236 RCC_OscInitStruct.PLL.PLLN = 100; // VCO output clock = 200 MHz (2 MHz * 100)
lypinator 0:bb348c97df44 237 RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; // PLLCLK = 100 MHz (200 MHz / 2)
lypinator 0:bb348c97df44 238 RCC_OscInitStruct.PLL.PLLQ = 2;
lypinator 0:bb348c97df44 239 RCC_OscInitStruct.PLL.PLLR = 2;
lypinator 0:bb348c97df44 240
lypinator 0:bb348c97df44 241 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
lypinator 0:bb348c97df44 242 return 0; // FAIL
lypinator 0:bb348c97df44 243 }
lypinator 0:bb348c97df44 244
lypinator 0:bb348c97df44 245 /* Select PLLSAI output as USB clock source */
lypinator 0:bb348c97df44 246 PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_CLK48;
lypinator 0:bb348c97df44 247 PeriphClkInitStruct.PLLI2S.PLLI2SM = 16;
lypinator 0:bb348c97df44 248 PeriphClkInitStruct.PLLI2S.PLLI2SN = 192;
lypinator 0:bb348c97df44 249 PeriphClkInitStruct.PLLI2S.PLLI2SQ = 4;
lypinator 0:bb348c97df44 250 PeriphClkInitStruct.PLLI2S.PLLI2SR = 2;
lypinator 0:bb348c97df44 251 PeriphClkInitStruct.Clk48ClockSelection = RCC_CLK48CLKSOURCE_PLLI2SQ;
lypinator 0:bb348c97df44 252 PeriphClkInitStruct.PLLI2SSelection = RCC_PLLI2SCLKSOURCE_PLLSRC;
lypinator 0:bb348c97df44 253
lypinator 0:bb348c97df44 254 HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);
lypinator 0:bb348c97df44 255
lypinator 0:bb348c97df44 256 /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
lypinator 0:bb348c97df44 257 RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
lypinator 0:bb348c97df44 258 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
lypinator 0:bb348c97df44 259 RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
lypinator 0:bb348c97df44 260 RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
lypinator 0:bb348c97df44 261 RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
lypinator 0:bb348c97df44 262
lypinator 0:bb348c97df44 263 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK) {
lypinator 0:bb348c97df44 264 return 0; // FAIL
lypinator 0:bb348c97df44 265 }
lypinator 0:bb348c97df44 266
lypinator 0:bb348c97df44 267 /* Output clock on MCO1 pin(PA8) for debugging purpose */
lypinator 0:bb348c97df44 268 //HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSI, RCC_MCODIV_1); // 16 MHz
lypinator 0:bb348c97df44 269
lypinator 0:bb348c97df44 270 return 1; // OK
lypinator 0:bb348c97df44 271 }
lypinator 0:bb348c97df44 272 #endif /* ((CLOCK_SOURCE) & USE_PLL_HSI) */