[参考译文] TMS320F28388D：对于记忆复制代码而言、代码运行时间过长。

尊敬的 Kevin：

长度(len)为26、实际上当 len 为26时、函数不会运行。  

  if ((len & 0x1U)== 0x1U)

尊敬的 Kevin：

是否有任何有关此问题的更新？

我运行下面的简单代码、还需要大约4.2us。 您能帮助确认一下为什么需要这么长时间吗？

//#############################################################################
//
// FILE:   led_ex1_blinky.c
//
// TITLE:  LED Blinky Example
//
//! \addtogroup bitfield_example_list
//! <h1> LED Blinky Example </h1>
//!
//! This example demonstrates how to blink a LED.
//!
//! \b External \b Connections \n
//!  - None.
//!
//! \b Watch \b Variables \n
//!  - None.
//!
//
//#############################################################################
//
//
// $Copyright:
// Copyright (C) 2022 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.
// $
//#############################################################################

//
// Included Files
//
#include "f28x_project.h"


Uint16 MoveDes=0x010000;
Uint16 Movesource=0x082000 ;


// Defines
//
#define DEVICE_GPIO_PIN_LED1    31
 //extern uint32_t RamfuncsRunStart;
//extern uint32_t RamfuncsLoadStart;

int len=22;
int address =0;

int test1[26];
int test2[26];

//
// Main
//
void main(void)
{
    uint16_t i;
    //
    // Initialize device clock and peripherals
    //
    InitSysCtrl();

    //
    // Initialize GPIO and configure the GPIO pin as a push-pull output
    //
    InitGpio();
    GPIO_SetupPinMux(DEVICE_GPIO_PIN_LED1, GPIO_MUX_CPU1, 0);
    GPIO_SetupPinOptions(DEVICE_GPIO_PIN_LED1, GPIO_OUTPUT, GPIO_PUSHPULL);

    //
    // Initialize PIE and clear PIE registers. Disables CPU interrupts. 
    //
    DINT;
    InitPieCtrl();
    IER = 0x0000;
    IFR = 0x0000;

    //
    // Initialize the PIE vector table with pointers to the shell Interrupt
    // Service Routines (ISR).
    //
    InitPieVectTable();

    //
    // Enable Global Interrupt (INTM) and realtime interrupt (DBGM)
    //
    EINT;
    ERTM;
for(i=0;i<26;i++)
{
    test1[i]=i;
}
    //
    // Loop Forever
    //
    for(;;)
    {
        //
        // Turn on LED
        //
        GPIO_WritePin(DEVICE_GPIO_PIN_LED1, 0);

//        uint32_t Addr = ESC_BASE + (uint32_t)(address >> 1U);
//        for( i = 0; i< (len >> 1);i++)
//        {
//            pData[ i ] = *(ESCMEM_ADDR*)( Addr + i );
//        }
//
       // memcpy(&MoveDes, &Movesource, (size_t)&len);
        for(i=0;i<26;i++)
        {
            test2[i]=test1[i];
        }
        //
        // Delay for a bit.
        //
//        DELAY_US(500000);

        //
        // Turn off LED
        //
        GPIO_WritePin(DEVICE_GPIO_PIN_LED1, 1);

//        //
//        // Delay for a bit.
//        //
//        DELAY_US(500000);
    }
}

//
// End of File
//