135 lines
3.6 KiB
C
135 lines
3.6 KiB
C
/**************************************************************************//**
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* @file system_M261.c
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* @version V2.00
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* @brief System Setting Source File
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*
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* @note
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* Copyright (c) 2019-2020 Nuvoton Technology Corporation
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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#include <stdio.h>
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#include <stdint.h>
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#include "NuMicro.h"
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#if defined(__ICCARM__)
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extern void *__vector_table; /* see startup file */
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#else
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extern void *__vector_handlers; /* see startup file */
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#endif
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/*----------------------------------------------------------------------------
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Clock Variable definitions
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*----------------------------------------------------------------------------*/
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uint32_t SystemCoreClock = __HSI; /*!< System Clock Frequency (Core Clock) */
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uint32_t CyclesPerUs = (__HSI / 1000000); /*!< Cycles per micro second */
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uint32_t PllClock = __HSI; /*!< PLL Output Clock Frequency */
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const uint32_t gau32ClkSrcTbl[] = {__HXT, __LXT, NULL, __LIRC, NULL, NULL, NULL, __HIRC};
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/**
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* @brief Update the Variable SystemCoreClock
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*
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* @param None
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*
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* @return None
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*
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* @details This function is used to update the variable SystemCoreClock
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* and must be called whenever the core clock is changed.
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*/
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void SystemCoreClockUpdate(void)
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{
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/* Update PLL Clock */
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PllClock = CLK_GetPLLClockFreq();
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/* Update System Core Clock */
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SystemCoreClock = CLK_GetCPUFreq();
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/* Update Cycles per micro second */
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CyclesPerUs = (SystemCoreClock + 500000) / 1000000;
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}
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/**
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* @brief System Initialization
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*
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* @param None
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*
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* @return None
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*
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* @details The necessary initialization of system. Global variables are forbidden here.
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*/
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void SystemInit(void)
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{
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#if defined (__VTOR_PRESENT) && (__VTOR_PRESENT == 1U)
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#if defined(__ICCARM__)
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SCB->VTOR = (uint32_t) &__vector_table;
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#else
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SCB->VTOR = (uint32_t) &__vector_handlers;
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#endif
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#endif
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#ifdef INIT_SYSCLK_AT_BOOTING
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#endif
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}
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#if USE_ASSERT
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/**
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* @brief Assert Error Message
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*
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* @param[in] file the source file name
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* @param[in] line line number
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*
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* @return None
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*
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* @details The function prints the source file name and line number where
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* the ASSERT_PARAM() error occurs, and then stops in an infinite loop.
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*/
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void AssertError(uint8_t * file, uint32_t line)
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{
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printf("[%s] line %d : wrong parameters.\r\n", file, line);
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/* Infinite loop */
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while(1) ;
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}
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#endif
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/* Return LR (return address)
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*
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* Replace BSP assembly implementation with toolchain built-in (borrow MBED_CALLER_ADDR())
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*/
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uint32_t __PC(void)
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{
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#if (defined(__GNUC__) || defined(__clang__)) && !defined(__CC_ARM)
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return (uint32_t) __builtin_extract_return_addr(__builtin_return_address(0));
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#elif defined(__CC_ARM)
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return (uint32_t) __builtin_return_address(0);
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#elif defined(__ICCARM__)
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return (uint32_t) __get_LR();
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#else
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#error("__PC() not implemented")
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#endif
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}
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