[参考译文] TM4C129ENCPDT：TI-RTOS USB 示例。 未释放内存

您好！
感谢您的回答。

我继续使用示例项目进行测试、并认为我发现了问题。

我有一个示例项目"fatsdusbcopy_EK_TM4C129EXL_TI_TivaTM4C129ENCPDT"
已更改、以便在 USB 记忆棒上创建一个文件、并将阵列的内容写入此文件。

此过程每3秒重复一次。
如果我停止程序并查看使用的堆存储器的大小、存储器将再次完全释放。 一切正常。

如果我现在将这两行添加到 xxx.cfg 文件中：

VAR Global = xdc.useModule ("ti.ndk.config.Global")；
Global.autoOpenCloseFD = true；

每次运行"copyArrayToUsb ()"函数后、不会再次释放20个字节。

在我的实际项目中、设置了 Global.autoOpenCloseFD = true。 这就是为什么这20个字节总是从我的堆中消失的原因。

我如何解决这个问题？

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/*
 *  ======== fatsdusbcopy.c ========
 */

/* XDCtools Header files */
#include <xdc/std.h>
#include <xdc/runtime/System.h>

/* BIOS Header files */
#include <ti/sysbios/BIOS.h>
#include <ti/sysbios/knl/Clock.h>
#include <ti/sysbios/knl/Task.h>

/* TI-RTOS Header files */
#include <ti/drivers/GPIO.h>
#include <ti/drivers/USBMSCHFatFs.h>

/* Example/Board Header files */
#include "Board.h"

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

/* Buffer size used for the file copy process */
#define CPY_BUFF_SIZE       2048

/* String conversion macro */
#define STR_(n)             #n
#define STR(n)              STR_(n)

/* Drive number used for FatFs */
#define SD_DRIVE_NUM           0
#define USB_DRIVE_NUM          1

#define TASKSTACKSIZE          1024
/*
 * Static task stack for the USBMSCHFatFs USB driver
 * This allows the application to reduce the required system Heap.
 */
static uint8_t usbServiceTaskStack[1024];

const char outputfileusb[] = "fat:"STR(USB_DRIVE_NUM)":output.txt";

const char textarray[] = \
"***********************************************************************\n"
"0         1         2         3         4         5         6         7\n"
"01234567890123456789012345678901234567890123456789012345678901234567890\n"
"This is some text to be inserted into the inputfile if there isn't\n"
"already an existing file located on the media.\n"
"If an inputfile already exists, or if the file was already once\n"
"generated, then the inputfile will NOT be modified.\n"
"***********************************************************************\n";

Task_Struct task0Struct;
Char task0Stack[TASKSTACKSIZE];

unsigned char cpy_buff[CPY_BUFF_SIZE];

/*
 *  ======== taskFxn ========
 *  Task to perform a file copy
 *
 *  Task tries to open an existing file inputfile[]. If the file doesn't
 *  exist, create one and write some known content into it.
 *  The contents of the inputfile[] are then copied to an output file
 *  outputfile[]. Once completed, the contents of the output file are
 *  printed onto the system console (stdout).
 *
 *  Task for this function is created statically. See the project's .cfg file.
 */

Void copyArrayToUsb(Void)
{
    USBMSCHFatFs_Handle usbmschfatfsHandle;
    USBMSCHFatFs_Params usbmschfatfsParams;

    /* Variables for the CIO functions */
    FILE *dst;

    /* Variables to keep track of the file copy progress */
    unsigned int bytesRead = 0;
    unsigned int bytesWritten = 0;
    unsigned int filesize;
    unsigned int totalBytesCopied = 0;

    /* Mount and register the USB Drive */
    USBMSCHFatFs_Params_init(&usbmschfatfsParams);
    usbmschfatfsParams.serviceTaskStackPtr = usbServiceTaskStack;
    usbmschfatfsParams.serviceTaskStackSize = sizeof(usbServiceTaskStack);
    usbmschfatfsHandle = USBMSCHFatFs_open(Board_USBMSCHFatFs0,
                                           USB_DRIVE_NUM,
                                          &usbmschfatfsParams);
    if (usbmschfatfsHandle == NULL) {
        System_abort("Error starting the USB Drive\n");
    }
    else {
        System_printf("Drive %u is mounted\n", USB_DRIVE_NUM);
    }

    /* Need to block until a USB Drive has been enumerated */
    if (!USBMSCHFatFs_waitForConnect(usbmschfatfsHandle, 10000)) {
        System_abort("No USB drive present, aborting...\n");
    }


    /* Create a new file object for the file copy */
    dst = fopen(outputfileusb, "w");
    if (!dst) {
        System_printf("Error opening \"%s\"\n", outputfileusb);
        System_abort("Aborting...\n");
    }
    else {
        System_printf("Starting file copy\n");
    }

    filesize = sizeof(textarray);



    /*  Copy the contents from the src to the dst */
    while (true)
    {
        /*  Write to dst file */
        bytesWritten = fwrite(textarray, 1, filesize, dst);
        if (bytesWritten < bytesRead) {
            System_printf("Disk Full\n");
            break; /* Error or Disk Full */
        }

        /*  Update the total number of bytes copied */
        totalBytesCopied += bytesWritten;

        if(totalBytesCopied >= filesize){
        	break;
        }
    }

    fflush(dst);


    /* Close both inputfile[] and outputfile[] */
    fclose(dst);


    /* Now output the outputfile[] contents onto the console */
    dst = fopen(outputfileusb, "r");
    if (!dst) {
        System_printf("Error opening \"%s\"\n", outputfileusb);
        System_abort("Aborting...\n");
    }

    /* Print file contents */
    while (true) {
        /* Read from output file */
        bytesRead = fread(cpy_buff, 1, CPY_BUFF_SIZE, dst);
        if (bytesRead == 0) {
            break; /* Error or EOF */
        }
        /* Write output */
        System_printf("%s", cpy_buff);
        System_flush();
    }

    /* Close the file */
    fclose(dst);



    /* Stopping the USB Drive */
    USBMSCHFatFs_close(usbmschfatfsHandle);
    System_printf("Drive %u unmounted\n", USB_DRIVE_NUM);
    System_flush();

}


Void taskFxn(UArg arg0, UArg arg1)
{

    while(1)
    {
    	Task_sleep(3000);

    	copyArrayToUsb();
    }
}

/*
 *  ======== main ========
 */
int main(void)
{
    Task_Params taskParams;

    /* Call board init functions */
    Board_initGeneral();
    Board_initGPIO();
    Board_initUSBMSCHFatFs();

    /* Construct file copy Task thread */
    Task_Params_init(&taskParams);
    taskParams.stackSize = TASKSTACKSIZE;
    taskParams.stack = &task0Stack;
    taskParams.instance->name = "fatsdUSBCopyTask";
    Task_construct(&task0Struct, (Task_FuncPtr)taskFxn, &taskParams, NULL);



    System_printf("Starting the FatSD USB Copy example\n");

    /* Start BIOS */
    BIOS_start();

    return (0);
}