MSP432P401R: MSP432运行速率问题

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若是可以的话，请给出您的代码和相关说明，谢谢

代码和原始问题中给出的类似，跑出来结果基本一直。配置系统时钟MCLK为外部晶振48MHz，从P4.3输出MCLK时钟，波形周期为20.8ns，没问题。执行IO口连续翻转语句，输出波形周期在600多ns。向了解为什么只有两句IO口翻转语句就用了30多到40个时钟周期？

以下是我的测试代码：

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/******************************************************************************
 * MSP432 Empty Project
 *
 * Description: An empty project that uses DriverLib
 *
 *                MSP432P401
 *             ------------------
 *         /|\|                  |
 *          | |                  |
 *          --|RST               |
 *            |                  |
 *            |                  |
 *            |                  |
 *            |                  |
 *            |                  |
 * Author: 
*******************************************************************************/
/* DriverLib Includes */
#include <ti/devices/msp432p4xx/driverlib/driverlib.h>

#include <ti/devices/msp432p4xx/inc/msp432p401r_classic.h>
#include <arm_math.h>
#include <arm_const_structs.h>

/* Standard Includes */
#include <stdint.h>
#include <stdbool.h>

int main(void)
{
    /* Stop Watchdog  */
    MAP_WDT_A_holdTimer();

    //![Simple CS Config]
       /* Configuring pins for peripheral/crystal usage and LED for output */
       MAP_GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_PJ,
       GPIO_PIN3 | GPIO_PIN2, GPIO_PRIMARY_MODULE_FUNCTION);
       MAP_GPIO_setAsOutputPin(GPIO_PORT_P1, GPIO_PIN0);

       /* Just in case the user wants to use the getACLK, getMCLK, etc. functions,
       * let's set the clock frequency in the code.
       */
       CS_setExternalClockSourceFrequency(32000,48000000);

       /* Starting HFXT in non-bypass mode without a timeout. Before we start
       * we have to change VCORE to 1 to support the 48MHz frequency */
       MAP_PCM_setCoreVoltageLevel(PCM_VCORE1);
       MAP_FlashCtl_setWaitState(FLASH_BANK0, 1);
       MAP_FlashCtl_setWaitState(FLASH_BANK1, 1);
       CS_startHFXT(false);

       /* Initializing MCLK to HFXT (effectively 48MHz) */
       MAP_CS_initClockSignal(CS_MCLK, CS_HFXTCLK_SELECT, CS_CLOCK_DIVIDER_1);
       //![Simple CS Config]

       P3OUT = 0x00;
       P3OUT = 0x01;
       P3OUT = 0x00;
       P3OUT = 0x01;
       P3OUT = 0x00;

       P3MAP01 = 0x00;
       P3MAP01 = 0x01;
       P3MAP01 = 0x00;

       /* Configuring SysTick to trigger at 12000000 (MCLK is 48MHz so this will
       * make it toggle every 0.25s) */
       MAP_SysTick_enableModule();
       MAP_SysTick_setPeriod(12000000);
       MAP_Interrupt_enableSleepOnIsrExit();
       MAP_SysTick_enableInterrupt();

       /* Enabling MASTER interrupts */
       MAP_Interrupt_enableMaster();

    while(1)
    {
        MAP_PCM_gotoLPM0();
        
    }

}

void SysTick_Handler(void)
{

    GPIO_setOutputHighOnPin(GPIO_PORT_P1, GPIO_PIN0);
    GPIO_setOutputLowOnPin(GPIO_PORT_P1, GPIO_PIN0);

}

你好，看了您的源码和运行对比了下，为什么我这边PXOUT = 0x00的指令周期是您的2倍呢？