TMS320F28388D: The code run too long for memorycopy code.

Hi Strong,

What length (len) value are they passing to this function? I would say the execution time will depend on the length of memory they're reading.

Best,

Kevin

Hi Kevin,

length (len) is 26, and actually the function will not run when len is 26. 

  if((len & 0x1U) == 0x1U)

Hi Kevin,

Any update about this issue?

I run the simple code below and also require about 4.2us. could you help check why it take so long?

//#############################################################################
//
// 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
//