TI中文支持网Part Number: MSP432P401R
Susan Yang：
请问您是如何配置的？
在 https://dev.ti.com/tirex/explore/node?node=AIt11.GE8nvJkpoVjCiItQ__z-lQYNj__LATEST 内
/* --COPYRIGHT--,BSD_EX* Copyright (c) 2013, Texas Instruments Incorporated* All rights reserved.** 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.**********************************************************************************MSP432 CODE EXAMPLE DISCLAIMER** MSP432 code examples are self-contained low-level programs that typically* demonstrate a single peripheral function or device feature in a highly* concise manner. For this the code may rely on the device's power-on default* register values and settings such as the clock configuration and care must* be taken when combining code from several examples to avoid potential side* effects. Also see http://www.ti.com/tool/mspdriverlib for an API functional* library & https://dev.ti.com/pinmux/ for a GUI approach to peripheral configuration.** --/COPYRIGHT--*/ //****************************************************************************** //MSP432P401 Demo - Device configuration for operation @ MCLK = DCO = 48MHz // //Description: Proper device configuration to enable operation at MCLK=48MHz //including: //1. Configure VCORE level to 1 //2. Configure flash wait-state to 1 //3. Configure DCO frequency to 48MHz //4. Ensure MCLK is sourced by DCO // //After configuration is complete, MCLK is output to port pin P4.3. // //MSP432P401x //----------------- ///|\|| //| || //--|RST| //|P4.3|----> MCLK //|| // //William Goh //Texas Instruments Inc. //June 2016 (updated) | November 2013 (created) //Built with CCSv6.1, IAR, Keil, GCC //****************************************************************************** #include "ti/devices/msp432p4xx/inc/msp.h" #include "stdint.h"void error(void);int main(void) {volatile uint32_t i;uint32_t currentPowerState;WDT_A->CTL = WDT_A_CTL_PW |WDT_A_CTL_HOLD;// Stop WDTP1->DIR |= BIT0;// P1.0 set as output/* NOTE: This example assumes the default power state is AM0_LDO.* Refer tomsp432p401x_pcm_0x code examples for more complete PCM* operations to exercise various power state transitions between active* modes.*//* Step 1: Transition to VCORE Level 1: AM0_LDO --> AM1_LDO *//* Get current power state, if it's not AM0_LDO, error out */currentPowerState = PCM->CTL0 & PCM_CTL0_CPM_MASK;if (currentPowerState != PCM_CTL0_CPM_0)error();while ((PCM->CTL1 & PCM_CTL1_PMR_BUSY));PCM->CTL0 = PCM_CTL0_KEY_VAL | PCM_CTL0_AMR_1;while ((PCM->CTL1 & PCM_CTL1_PMR_BUSY));if (PCM->IFG & PCM_IFG_AM_INVALID_TR_IFG)error();// Error if transition was not successfulif ((PCM->CTL0 & PCM_CTL0_CPM_MASK) != PCM_CTL0_CPM_1)error();// Error if device is not in AM1_LDO mode/* Step 2: Configure Flash wait-state to 1 for both banks 0 & 1 */FLCTL->BANK0_RDCTL = (FLCTL->BANK0_RDCTL & ~(FLCTL_BANK0_RDCTL_WAIT_MASK)) |FLCTL_BANK0_RDCTL_WAIT_1;FLCTL->BANK1_RDCTL= (FLCTL->BANK0_RDCTL & ~(FLCTL_BANK1_RDCTL_WAIT_MASK)) |FLCTL_BANK1_RDCTL_WAIT_1;/* Step 3: Configure DCO to 48MHz, ensure MCLK uses DCO as source*/CS->KEY = CS_KEY_VAL ;// Unlock CS module for register accessCS->CTL0 = 0;// Reset tuning parametersCS->CTL0 = CS_CTL0_DCORSEL_5;// Set DCO to 48MHz/* Select MCLK = DCO, no divider */CS->CTL1 = (CS->CTL1 & ~(CS_CTL1_SELM_MASK | CS_CTL1_DIVM_MASK)) |CS_CTL1_SELM_3;CS->KEY = 0;// Lock CS module from unintended accesses/* Step 4: Output MCLK to port pin to demonstrate 48MHz operation */P4->DIR |= BIT3;P4->SEL0 |=BIT3;// Output MCLKP4->SEL1 &= ~(BIT3);while (1)// continuous loop{P1->OUT ^= BIT0;// Blink P1.0 LEDfor (i = 200000; i > 0; i--);// Delay} }void error(void) {volatile uint32_t i;while (1){P1->OUT ^= BIT0;for(i = 20000; i > 0; i--);// Blink LED forever} }// Description: Proper device configuration to enable operation at MCLK=48MHz// including:// 1. Configure VCORE level to 1// 2. Configure flash wait-state to 1// 3. Configure DCO frequency to 48MHz// 4. Ensure MCLK is sourced by DCO
配置电压核心水平等级到1
配置Flash等待状态到1
配置数控时钟振荡频率到48MHz
确保主时钟MCLK的时钟源来自DCO另外 在更改 DCO 后，您可以将 MCLK 输出到引脚或使用 CS_getMCLK() 函数来评估 MCLK 频率。逻辑分析仪或示波器也可用于评估 SPI 通信速度。
