mirror of https://github.com/ARMmbed/mbed-os.git
80 lines
3.2 KiB
C
80 lines
3.2 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2017, STMicroelectronics
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "cmsis.h"
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int mbed_sdk_inited = 0;
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extern void SetSysClock(void);
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// This function is called after RAM initialization and before main.
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void mbed_sdk_init()
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{
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#if defined(__ICACHE_PRESENT) /* STM32F7 */
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// The mbed_sdk_init can be called either during cold boot or during
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// application boot after bootloader has been executed.
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// In case the bootloader has already enabled the cache,
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// is is needed to not enable it again.
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if ((SCB->CCR & (uint32_t)SCB_CCR_IC_Msk) == 0) { // If ICache is disabled
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SCB_EnableICache();
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}
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if ((SCB->CCR & (uint32_t)SCB_CCR_DC_Msk) == 0) { // If DCache is disabled
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SCB_EnableDCache();
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}
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#endif /* __ICACHE_PRESENT */
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// Update the SystemCoreClock variable.
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SystemCoreClockUpdate();
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HAL_Init();
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/* Configure the System clock source, PLL Multiplier and Divider factors,
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AHB/APBx prescalers and Flash settings */
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SetSysClock();
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SystemCoreClockUpdate();
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/* Start LSI clock for RTC */
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#if DEVICE_RTC
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#if !MBED_CONF_TARGET_LSE_AVAILABLE
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RCC_OscInitTypeDef RCC_OscInitStruct = {0};
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if (__HAL_RCC_GET_RTC_SOURCE() != RCC_RTCCLKSOURCE_NO_CLK) {
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#if TARGET_STM32WB
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI1;
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#else
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI;
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#endif
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
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RCC_OscInitStruct.LSIState = RCC_LSI_ON;
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if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
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error("Init : cannot initialize LSI\n");
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}
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}
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#endif /* ! MBED_CONF_TARGET_LSE_AVAILABLE */
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#endif /* DEVICE_RTC */
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mbed_sdk_inited = 1;
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}
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