RTOS/TM4C123GH6PM: How to change the number of fatfs files that may be open concurrently.

Hi David,
Your problem description is much deeper than what I know about the FATFS. Have you tried to increase the heap and stack size first and will be make a difference (i.e. allowing you to open the 8th file)?

Can you also clarify if you are using the TI-RTOS FATFS and TI-RTOS SD Card drivers? If yes, then I will forward you question to our TI-RTOS experts for advice.

Hi Charles,

I have tried maximizing first the heap, then the stack then both about equal but all to no effect.

I'll attach my .cfg file. Maybe you can spot something I've messed up.

In ffconf.h...

#ifndef _FFCONF
#define _FFCONF 8255 /* Revision ID */

I edited these...


#define _VOLUMES 1
/* Number of volumes (logical drives) to be used. */

#define _FS_SHARE 15 /* 0:Disable or >=1:Enable */
/* To enable file shareing feature, set _FS_SHARE to 1 or greater. The value
defines how many files can be opened simultaneously. */


/cfs-file/__key/communityserver-components-multipleuploadfilemanager/3bfe50e9_2D00_41fa_2D00_4aec_2D00_be39_2D00_00708ddb1be3-150397-complete/BOB.cfg

Thanks Charles

Hi David,
You have not answered me if you are using TI-RTOS FATFS and TI-RTOS SD Card drivers. If you are using TI-RTOS can you send the .cfg file? Thanks.

Hi Charles,

Here is a copy and paste of the .cfg.

/*
 * Copyright (c) 2014, 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.
 */

/*
 *  ======== fatsd.cfg ========
 */

/* ================ General configuration ================ */
var Defaults = xdc.useModule('xdc.runtime.Defaults');
//var Diags = xdc.useModule('xdc.runtime.Diags');
//var Error = xdc.useModule('xdc.runtime.Error');
//var Log = xdc.useModule('xdc.runtime.Log');
var Main = xdc.useModule('xdc.runtime.Main');
var Memory = xdc.useModule('xdc.runtime.Memory');
var System = xdc.useModule('xdc.runtime.System');
var Swi = xdc.useModule('ti.sysbios.knl.Swi');
var Clock = xdc.useModule('ti.sysbios.knl.Clock');
Clock.swiPriority = 7;
Clock.timerId = 0;
var Hwi = xdc.useModule('ti.sysbios.family.arm.m3.Hwi');
var Task = xdc.useModule('ti.sysbios.knl.Task');
var FatFs = xdc.useModule('ti.sysbios.fatfs.FatFS');
var Seconds = xdc.useModule('ti.sysbios.hal.Seconds');
//var LoggerRunMode = xdc.useModule('ti.uia.loggers.LoggerRunMode');
//var TimestampProvider = xdc.useModule('ti.sysbios.family.arm.lm4.TimestampProvider');
//var ti_sysbios_hal_Hwi = xdc.useModule('ti.sysbios.hal.Hwi');
/*
 *  Program.stack is ignored with IAR. Use the project options in
 *  IAR Embedded Workbench to alter the system stack size.
 */
if (!Program.build.target.$name.match(/iar/)) {
    /*
     *  Reducing the system stack size (used by ISRs and Swis) to reduce
     *  RAM usage.
     */
Program.stack = 4096;
}

Program.stack = 4096;
/*
 * Comment this line to allow module names to be loaded on the target.
 * The module name strings are placed in the .const section. Setting this
 * parameter to false will save space in the .const section.  Error and
 * Assert messages will contain an "unknown module" prefix instead
 * of the actual module name.
 */
Defaults.common$.namedModule = false;

/*
 * Minimize exit handler array in System.  The System module includes
 * an array of functions that are registered with System_atexit() to be
 * called by System_exit().
 */
System.maxAtexitHandlers = 2;

/* ================ System configuration ================ */
var SysMin = xdc.useModule('xdc.runtime.SysMin');
System.SupportProxy = SysMin;

/* Enable Semihosting for GNU targets to print to CCS console */
if (Program.build.target.$name.match(/gnu/)) {
    var SemiHost = xdc.useModule('ti.sysbios.rts.gnu.SemiHostSupport');
}
System.extendedFormats = '%$L%$S%$F%f';
/* ================ BIOS configuration ================ */
/*
 * Disable unused BIOS features to minimize footprint.
 */
var BIOS = xdc.useModule('ti.sysbios.BIOS');
BIOS.libType = BIOS.LibType_Debug;
/* Reduce the heap size */
BIOS.heapSize = 13540;
// BIOS.logsEnabled = true;
// BIOS.assertsEnabled = true;

var TIRTOS = xdc.useModule('ti.tirtos.TIRTOS');
TIRTOS.libType = TIRTOS.LibType_NonInstrumented;
TIRTOS.useSDSPI = true;
TIRTOS.useGPIO = false;
TIRTOS.useI2C = false;
TIRTOS.useSPI = false;
var clock4Params0 = new Clock.Params();
clock4Params0.instance.name = "clock_ArmServos_Handle";
clock4Params0.period = 10;
clock4Params0.startFlag = false;
Program.global.clock_ArmServos_Handle = Clock.create("&clock_ArmServos", 2, clock4Params0);
var clock5Params0 = new Clock.Params();
clock5Params0.instance.name = "clock_ScanningServo_Handle";
clock5Params0.period = 50;
clock5Params0.startFlag = false;
clock5Params0.arg = null;
Program.global.clock_ScanningServo_Handle = Clock.create("&clock_ScanningServo", 5, clock5Params0);
var clock5Params1 = new Clock.Params();
clock5Params1.instance.name = "clock_Location_Handle";
clock5Params1.period = 100;
clock5Params1.startFlag = false;
Program.global.clock_Location_Handle = Clock.create("&clock_Location", 4, clock5Params1);
var clock6Params = new Clock.Params();
clock6Params.instance.name = "clock_MillisecTimer_Handle";
clock6Params.period = 1;
clock6Params.startFlag = false;
Program.global.clock_MillisecTimer_Handle = Clock.create("&clock_MillisecTimer", 1, clock6Params);
var clock6Params0 = new Clock.Params();
clock6Params0.instance.name = "clock_PID_Handle";
clock6Params0.period = 1;
Program.global.clock_PID_Handle = Clock.create("&clock_PID", 1, clock6Params0);
var clock7Params = new Clock.Params();
clock7Params.instance.name = "clock_AtoDTimer_Handle";
clock7Params.period = 10;
clock7Params.startFlag = false;
Program.global.clock_AtoDTimer_Handle = Clock.create("&clock_AtoDTimer", 3, clock7Params);
var swi0Params = new Swi.Params();
swi0Params.instance.name = "swiConvertAnalogValues_Handle";
swi0Params.priority = 4;
Program.global.swiConvertAnalogValues_Handle = Swi.create("&swiConvertAnalogValues", swi0Params);
var task0Params = new Task.Params();
task0Params.instance.name = "TheCoreTask_Handle";
task0Params.stackSize = 5000;
task0Params.priority = 1;
Program.global.TheCoreTask_Handle = Task.create("&TheCoreTask", task0Params);
var hwi0Params = new Hwi.Params();
hwi0Params.instance.name = "UART1_ISR_Handle";
hwi0Params.enableInt = true;
hwi0Params.priority = 35;
Program.global.UART1_ISR_Handle = Hwi.create(22, "&UART1_ISR", hwi0Params);
var hwi1Params = new Hwi.Params();
hwi1Params.instance.name = "UART5_PIXYCAM_ISR_Handle";
hwi1Params.priority = 34;
hwi1Params.enableInt = true;
Program.global.UART5_PIXYCAM_ISR_Handle = Hwi.create(77, "&UART5_PIXYCAM_ISR", hwi1Params);
var hwi2Params = new Hwi.Params();
hwi2Params.instance.name = "ADC0_FIFO_Full_ISR_Handle";
hwi2Params.priority = 33;
Program.global.ADC0_FIFO_Full_ISR_Handle = Hwi.create(30, "&hwi_ADC0_FIFO_Full_ISR", hwi2Params);
var hwi3Params = new Hwi.Params();
hwi3Params.instance.name = "ADC1_FIFO_Full_ISR_Handle";
hwi3Params.priority = 33;
Program.global.ADC1_FIFO_Full_ISR_Handle = Hwi.create(64, "&hwi_ADC1_FIFO_Full_ISR", hwi3Params);

Task.idleTaskVitalTaskFlag = false;
Task.enableIdleTask = false;

Hi David,
Thanks for the .cfg file. I will forward your question to our TI-RTOS experts for assistance.

Hi David,

_FS_SHARE is for the number of threads that can share a file....not the number of unique files that be open. That is unlimited (per FatFS website)

Filesystem type: FAT, FAT32(rev0.0) and exFAT(rev1.0).

Number of open files: Unlimited. (depends on available memory)

Number of volumes: Upto 10.

Volume size: Upto 2 TB at 512 bytes/sector.

File size: Upto 4 GB - 1 on FAT volume and virtually unlimited on exFAT volume.

Cluster size: Upto 128 sectors on FAT volume and upto 16 MB on exFAT volume.

Sector size: 512, 1024, 2048 and 4096 bytes.

I think something else is going on. In a task, can you just have a loop that opens N unique files and see if that works?

Todd

Hi Todd, re: "In a task, can you just have a loop that opens N unique files and see if that works?"

Yes, this is what my program is doing...

Now:

Program.stack = 2048;

task0Params.stackSize = 5000; (My one and only Task)

BIOS.heapSize = 15360;

SRAM Memory Allocation is 32,572(99%)

More possibly relevant...

I can 'load' 7 files into scriptList[]. Attempting to load an 8th causes 'false' to return from fileExists().

Cheers

Is there any chance that the filename in the TOKENPTRS[] array for file number 7 is incorrect (ie a typo) and doesn't exist in the file system?

Alan

Hi Alan,

I tested this by swapping the order of P.BOB and Q.BOB in the 'load' parameter list.

In that case Q.BOB gets loaded and fileExists() returns false when trying to open P.BOB.

My heap use is practically non existent.

The only use of it is for storing each scripts local variables and labels in linked lists.

Here's a quite out of date image (but still capturing the essence) of what I'm attempting...

Thanks Alan

Cheers

Hi Alan,

Yes, FOPEN_MAX was set to 10. I changed it to 15... Here's a picture of the situation...

In the mean time I've been working out the bugs and it's perfect now! (a statement that always makes my buddy laugh).

I know, eventually, we'll figure it out.

Thanks for the suggestions. I'm just about to read the 'cplusplus' link you gave.

Cheers

Dave

david genge said:

Yes, FOPEN_MAX was set to 10. I changed it to 15... Here's a picture of the situation...

I think you have to change _NSTREAM as well as _NFILE -  see Compiler/TMS320C6674: RTFS File Descriptors > 17 open at a time?

The referenced thread is for the TI C6000 compiler, but think the same principal applies to the TI ARM compiler.

david genge said:

Yes, FOPEN_MAX was set to 10. I changed it to 15...

Given that the picture shows that _ftable only has 10 entries it looks like the compiler run time library wasn't re-built after _NFILE was changed.

When a source file is changed in the compiler run time library source directory is changed, the library isn't automatically re-built when you build your CCS project. To force the run time library to be rebuilt after _NFILE and _NSTREAM have been increased:

a. In the linker .map file of your project find a line of the following form which identifies which library file is used from the compiler:

    /home/mr_halfword/ti/ccs830/ccsv8/tools/compiler/ti-cgt-arm_18.1.4.LTS/lib/rtsv7M4_T_le_v4SPD16_eabi.lib

b. Delete the above file.

c. Re-build your CCS project and there should be output of the following form from the linker indicating that the library is being built:

<Linking>
warning #10366-D: automatic library build: using library "/home/mr_halfword/ti/ccs830/ccsv8/tools/compiler/ti-cgt-arm_18.1.4.LTS/lib/rtsv7M4_T_le_v4SPD16_eabi.lib" for the first time, so it must be built.  This may take a few minutes.
Creating library /tmp/TI_MKLIB57mlHN/rtsv7M4_T_le_v4SPD16_eabi.lib

See Mklib for more information on how the run time library is built.