TMS570LC4357: TI Fee functions hang inside the FreeRTOS task.

U A

Part Number: TMS570LC4357
Other Parts Discussed in Thread: HALCOGEN

My project is running using FreeRTOS which is generated from HalCoGen on Hercules Development Kit. Multiple tasks are running in the design. One of the tasks is to read and write from the Flash using TI FEE functions.
I am facing an issue when I try to use TI FEE functions from the FreeRTOS task. The task hangs in TI_Fee_Init() forever. The TI FEE functions are working fine when running outside the tasks.

All the links and files mentioned in the post are inaccessible. Can anyone please send me the correct links and files?

Also, based on that post, I should switch from user mode to supervisory mode to execute the TI FEE functions. Can anyone please help me understand how to switch the processor to supervisory mode?

#include "FreeRTOS.h"
#include "os_task.h"
#include "ti_fee.h"
#include "HL_sci.h"
#include "stdio.h"

xTaskHandle xTestTaskHandler

void vTestTask();

int main(void)
{
/* USER CODE BEGIN (3) */
    sciInit();

    xTaskCreate(vTestTask, "TestTask", 5 * configMINIMAL_STACK_SIZE, NULL, 1 , &xTestTaskHandler);
    vTaskStartScheduler();
    
    while(1);
    
/* USER CODE END */
    return 0;
}


void vTestTask(){
    //varialbes
    
    //========== flash initialization ==========
    TI_Fee_Init();
    do
    {
        TI_Fee_MainFunction();
        delay();
        Status = TI_Fee_GetStatus(0);
    }
    while (Status != IDLE);
    
    //========== write to flash ==========
    blockNumber = 0x1;
    TI_Fee_WriteAsync(blockNumber, &memoryBlock[0]);
    do
    {
        TI_Fee_MainFunction();
        delay();
        Status = TI_Fee_GetStatus(0);
    }
    while (Status != IDLE);
    
    //========== read flash ===========
    blockOffset = 0x00;
    length = 68;
    outputResult = TI_Fee_Read(blockNumber, blockOffset, Read_Ptr, length);
    do
    {
        TI_Fee_MainFunction();
        delay();
        Status = TI_Fee_GetStatus(0);
    }
    while (Status != IDLE);
    while(1){
        sciDisplayData(sciREG1, (uint8*) Read_Ptr, 4);
    }
}

over 2 years ago

0 jagadish gundavarapu over 2 years ago

TI__Guru 70551 points

Hi,

Please refer below application note to know the how to enter into SVC mode from user mode.

Interrupt and Exception Handling on Hercules ARM Cortex-R4/5-Based Microcontrollers

I will also try to provide an example code for you.

Thanks & Regards,
Jagadish.

0 jagadish gundavarapu over 2 years ago in reply to jagadish gundavarapu

TI__Guru 70551 points

Hi,

The below thread contains the example code

(+) TMS570 Flash API 1.0.5, DataEntry error generated inside API function Flash_Erase_Sector_B() - Arm-based microcontrollers forum - Arm-based microcontrollers - TI E2E support forums

Thanks & Regards,

Jagadish.

0 U A over 2 years ago in reply to jagadish gundavarapu

Prodigy 81 points

Thank you, Jagadish, for your reply.
I added a few lines in the code based on my understanding after reading the document to enter SVC mode.

//...
//...
//...
#pragma SWI_ALIAS(switchCpuMode, 1);
extern void switchCpuMode(uint32_t mode);
//...
//...

int main(){
    //...
    //...

    switchCpuMode(1); //calling function to enter SVC 

    TI_Fee_Format(0x5A5A5A5AU); //Format all EEPROM
    TI_Fee_Init(); //flash initialization
    do
    {
        TI_Fee_MainFunction();
        delay();
        Status = TI_Fee_GetStatus(0);
    }
    while (Status != IDLE);

    xTaskCreate(...); //writing and reading the flash
    vTaskStartScheduler();
}

But the issue isn't resolved. Can you please tell me if this is the right approach to this problem?

0 jagadish gundavarapu over 2 years ago in reply to U A

TI__Guru 70551 points

Hi U A,

Just now i created one example code to enter into supervisor mode

It's working fine and can you add this code and test it at your end.

Basically, you need to add 3 files to work with this project svc.c, _svc.asm and svc.h

Also take care of the below modification

USERMODE_TO_SVCMODE_LC4357.zip

Thanks & Regards,
Jagadish.

0 U A over 2 years ago in reply to jagadish gundavarapu

Prodigy 81 points

jagadish gundavarapu

Thank you very much for the help.

I can now change the ARM modes by following your method. But there arises another issue. This method isn’t working in FreeRTOS task.
Following your instruction, I changed the HL_sys_intvecs.asm file.

default code:

Modified code:

This modification allows me to change the ARM mode but hangs in the xTaskCreate(...). If I switch back to the default code, the xTaskCreate(...) starts working and the mode remains in USER mode. Can you please help me with this issue.

I am attaching my test project.
ppm_flash_test.zip

I appreciate your time and help.

Regards
UA

0 jagadish gundavarapu over 2 years ago in reply to U A

TI__Guru 70551 points

Hi UA,

Just now i debug your project and noticed it is hangs at "undefEntry", is it same issue you are getting?

--
Thanks & Regards,
Jagadish.

0 U A over 2 years ago in reply to jagadish gundavarapu

Prodigy 81 points

Hi jagadish gundavarapu,
My code hangs in resetEntry after executing the MPU_xTaskCreate(...) function.

//os_mpu_wrappers.c

BaseType_t MPU_xTaskCreate( TaskFunction_t pxTaskCode, 
                            const char * const pcName, 
                            const uint16_t usStackDepth, 
                            void * const pvParameters, 
                            UBaseType_t uxPriority, 
                            TaskHandle_t * const pxCreatedTask )
{
	BaseType_t xReturn;
	BaseType_t xRunningPrivileged = prvRaisePrivilege();
	xReturn = xTaskCreate( pxTaskCode, pcName, usStackDepth, pvParameters, uxPriority, pxCreatedTask );
	portRESET_PRIVILEGE( xRunningPrivileged );
	return xReturn;
}

I am attaching the project again in case something went wrong last time.
5822.ppm_flash_test.zip

The project currently hangs in “resettEntry”. If I replace _svc (in svcEntry) with vPortSWI (in undefEntry), the code starts working (prints 0x41).

MPU is disabled in HalCoGen.

Can you please give me a solution where I can go to the supervisor mode to use flash Read/write and the FreeRTOS task works?

Thank you for your help.

Regards
UA

0 jagadish gundavarapu over 2 years ago in reply to U A

TI__Guru 70551 points

Hi UA,

Thanks for sharing the code, i started debugging your issue and i will given an update as soon as possible.

0 U A over 2 years ago in reply to jagadish gundavarapu

Prodigy 81 points

I am at a very critical stage of a project.
Please let me know if you need more information from me.

Thank you, Jagadish, for your help and time.

0 jagadish gundavarapu over 2 years ago in reply to U A

TI__Guru 70551 points

Hi UA,

I created one demo which fulfills your requirements. So, can you please test with my attached demo once?

RTOS_FEE_LC4357.zip

The above demo worked perfectly with my Launchpad.

Thanks & regards,
Jagadish.

0 U A over 2 years ago in reply to jagadish gundavarapu

Prodigy 81 points

Thank you, Jagadish, for your reply.

Your attached project runs on my machine. But I don’t think that solves my problem. I never have any issues running TI_FEE drivers outside the freeRTOS tasks. My issue only arises when I tried to use TI_FEE drivers inside the task and my project requirement strictly needs to Read/Write flash from FreeRTOS Task.

Here is a brief description of my requirement.

Please let me know if you need more information or want me to clarify anything.

Thank you again.

Regards
UA

0 jagadish gundavarapu over 2 years ago in reply to U A

TI__Guru 70551 points

Hi UA,

U A said:
I never have any issues running TI_FEE drivers outside the freeRTOS tasks.

Okay, i guess your initially attached code doing the same thing that is why i did modifications according to that.

Thanks for sharing your requirement, let me try in that way.

Thanks & regards,
jagadish.

0 U A over 2 years ago in reply to jagadish gundavarapu

Prodigy 81 points

Thank you jagadish gundavarapu

+1 jagadish gundavarapu over 2 years ago in reply to U A

TI__Guru 70551 points

Hi UA,

I found how to do that, do the following thing.

change the mode to supervisor in the task itself just before calling the FEE write function.

And change back to user mode after finishing the write function as shown above.

I did the testing and it worked for me, i am attaching my project for your reference.

RTOS_FEE_LC4357 (2).zip

Thanks & regards,
Jagadish.

0 U A over 2 years ago in reply to jagadish gundavarapu

Prodigy 81 points

Your attached project didn’t run correctly on my machine. But the issue is resolved in my project after following your method.

Thanks a lot, Jagadish for your time and patience. I appreciate your help.
Kudos!!!

UA