• 阿斯卡德5244
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  • 2019-08-02 16:29
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基于TI公司的msp432E401Y的keil模板 可实现以太网的连接控制 为开发msp432E401Y提供帮助
msp432E401Y.zip
内容介绍
/****************************************************************************** * * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/ * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the * distribution. * * Neither the name of Texas Instruments Incorporated nor the names of * its contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ******************************************************************************/ #include <stdint.h> #include "msp.h" /*---------------------------------------------------------------------------- Define clocks *----------------------------------------------------------------------------*/ #define __SYSTEM_CLOCK (16000000ul) /* Update frequency to match the crystal frequency on your board */ #define XTAL_FREQ (25000000ul) /*---------------------------------------------------------------------------- Clock Variable definitions *----------------------------------------------------------------------------*/ uint32_t SystemCoreClock = __SYSTEM_CLOCK; /*!< System Clock Frequency (Core Clock)*/ /*---------------------------------------------------------------------------- Clock functions *----------------------------------------------------------------------------*/ void SystemCoreClockUpdate (void) /* Get Core Clock Frequency */ { uint32_t getClockDivider; uint32_t getPLLMIntValue; uint32_t getPLLNValue; uint32_t getPLLQValue; /* Update the default System Clock value for MSP432E4x devices */ SystemCoreClock = __SYSTEM_CLOCK; if((SYSCTL->RSCLKCFG & SYSCTL_RSCLKCFG_USEPLL) == SYSCTL_RSCLKCFG_USEPLL) { getClockDivider = (SYSCTL->RSCLKCFG & SYSCTL_RSCLKCFG_PSYSDIV_M) >> SYSCTL_RSCLKCFG_PSYSDIV_S; getPLLMIntValue = (SYSCTL->PLLFREQ0 & SYSCTL_PLLFREQ0_MINT_M) >> SYSCTL_PLLFREQ0_MINT_S; getPLLNValue = (SYSCTL->PLLFREQ1 & SYSCTL_PLLFREQ1_N_M) >> SYSCTL_PLLFREQ1_N_S; getPLLQValue = (SYSCTL->PLLFREQ1 & SYSCTL_PLLFREQ1_Q_M) >> SYSCTL_PLLFREQ1_Q_S; if((SYSCTL->RSCLKCFG & SYSCTL_RSCLKCFG_PLLSRC_M) == SYSCTL_RSCLKCFG_PLLSRC_PIOSC) { SystemCoreClock = (__SYSTEM_CLOCK * (getPLLMIntValue)) / ((getPLLNValue + 1) * (getPLLQValue + 1)); SystemCoreClock = SystemCoreClock / (getClockDivider + 1); } else if((SYSCTL->RSCLKCFG & SYSCTL_RSCLKCFG_PLLSRC_M) == SYSCTL_RSCLKCFG_PLLSRC_MOSC) { SystemCoreClock = (XTAL_FREQ * (getPLLMIntValue)) / ((getPLLNValue + 1) * (getPLLQValue + 1)); SystemCoreClock = SystemCoreClock / (getClockDivider + 1); } } else { getClockDivider = (SYSCTL->RSCLKCFG & SYSCTL_RSCLKCFG_OSYSDIV_M) >> SYSCTL_RSCLKCFG_OSYSDIV_S; if((SYSCTL->RSCLKCFG & SYSCTL_RSCLKCFG_OSCSRC_M) == SYSCTL_RSCLKCFG_OSCSRC_PIOSC) { SystemCoreClock = __SYSTEM_CLOCK / (getClockDivider + 1); } else if((SYSCTL->RSCLKCFG & SYSCTL_RSCLKCFG_OSCSRC_M) == SYSCTL_RSCLKCFG_OSCSRC_MOSC) { SystemCoreClock = XTAL_FREQ / (getClockDivider + 1); } } } /** * Initialize the system * * @param none * @return none * * @brief Setup the microcontroller system. * Initialize the System. */ void SystemInit (void) { #if (__FPU_USED == 1) SCB->CPACR |= ((3UL << 10*2) | /* set CP10 Full Access */ (3UL << 11*2) ); /* set CP11 Full Access */ #endif #ifdef UNALIGNED_SUPPORT_DISABLE SCB->CCR |= SCB_CCR_UNALIGN_TRP_Msk; #endif SystemCoreClock = __SYSTEM_CLOCK; }
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