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Reg MSP432 SRAM memory access while using JTAG emulator for programming the MSP432 Launchpad

electrolife
Prodigy 190 points

Hai,

Now I am working with MSP432 Launchpad. I am trying to write some text in SRAM memory region. While using Launchpad Emulator, I successfully wrote my text in SRAM memory. But When I used JTAG emulator instead of MSP432 emulator, I am not able access SRAM memory. After googling through th web pages, I came to know that this is because of BSL protection of memory regions. How can I unprotect the SRAM memory regions using BSL. Please let me know the steps for unprotect the SRAM as soon as possible.

  • 0
    TI__Mastermind 25045 points
    Hi Keerthana,

    Which JTAG emulator are you referring to?? Could you please share your project?? Also which IDE are you using??

    Thanks,

    David
  • 0 in reply to DavidL
    Prodigy 190 points

    Hello David,

    Thank you. I am using Code Composer Studio v 6.1.1 and  JTAG emulator  xds100v2 TI DSP emulator. I can get the output for normal LED blinking codes.I attached my project file. I am trying to import example project.

    #include "msp432.h"
    #include "driverlib.h"
    #include "string.h"
    void TestSRAMBankEnable(void);
    int main(void)
    {
        MAP_WDT_A_holdTimer();
        MAP_Interrupt_disableMaster();
        MAP_PCM_setCoreVoltageLevel(PCM_VCORE1);
        MAP_CS_setDCOCenteredFrequency(CS_DCO_FREQUENCY_48);
        while(1)
        {
        TestSRAMBankEnable();
        __delay_cycles(1000000);
        __delay_cycles(1000000);
        __delay_cycles(1000000);
        __delay_cycles(1000000);
        __delay_cycles(1000000);
        __delay_cycles(1000000);
        }
    }
    void TestSRAMBankEnable(void)
    {
        uint32_t i;
        while (!(SYSCTL_SRAM_BANKEN & SYSCTL_SRAM_BANKEN_SRAM_RDY));
        SysCtl_enableSRAMBank(SYSCTL_SRAM_BANK7);
        while (!(SYSCTL_SRAM_BANKEN & SYSCTL_SRAM_BANKEN_SRAM_RDY));
        * ( (uint32_t*) 0x2000EFFC) = 0x01;
        i = * ( (uint32_t*) 0x2000EFFC);
        if (i== 0x01)
        {
            P1DIR |= BIT0;
            P1OUT |= BIT0;
            for (i=0;i<100000;i++);
        }
        else
            while(1);
    }
       This code is working for me while I am using MSP432 emulator in launchpad. But It is not working for me while using JTAG emulator. 
  • 0 in reply to DavidL
    Prodigy 190 points

    Hello David,

    Initially I used flash memory to store the text. But Now I want to store that string into SRAM memory region. Following code is fash memory access code. Also I did not check the flash memory access by programming the launchpad using external JTAG emulator.

    #include "msp432.h"
    #include "driverlib.h"
    #include "string.h"
    #define BUFFER_MEMORY_START 0x000200000 // Starting Flash Address to Read/Write Operation

    uint8_t buffer[55] = {"STEPS Knowledge Services Private Ltd, Coimbatore-16"};
    uint8_t i=0,ReadFlashData[50];
    uint32_t add_ptr = 0x200000;

    void EraseAndProgramFlash(void);
    void ReadFlash(void);

    int main(void)
    {
    MAP_WDT_A_holdTimer();
    MAP_Interrupt_disableMaster();
    MAP_PCM_setCoreVoltageLevel(PCM_VCORE1);
    MAP_FlashCtl_setWaitState(FLASH_BANK0, 2);
    MAP_FlashCtl_setWaitState(FLASH_BANK1, 2);
    EraseAndProgramFlash();
    __delay_cycles(100000);
    ReadFlash();
    while(1);
    }

    void EraseAndProgramFlash(void)
    {
    MAP_FlashCtl_unprotectSector(FLASH_INFO_MEMORY_SPACE_BANK0,FLASH_SECTOR0);
    while(!MAP_FlashCtl_eraseSector(BUFFER_MEMORY_START)); // Erase Sector Value
    __no_operation(); //set breakpoint here to view memory
    while (!MAP_FlashCtl_programMemory(buffer,(void*) BUFFER_MEMORY_START, 52)); // databuffer, starting address, datalength
    MAP_FlashCtl_protectSector(FLASH_INFO_MEMORY_SPACE_BANK0,FLASH_SECTOR0);
    __no_operation(); //set breakpoint here to view memory
    }

    void ReadFlash(void)
    {
    MAP_FlashCtl_unprotectSector(FLASH_INFO_MEMORY_SPACE_BANK0,FLASH_SECTOR0);
    MAP_FlashCtl_setReadMode(FLASH_BANK0,FLASH_MARGIN0_READ_MODE); // Enable Read Operation
    MAP_FlashCtl_enableReadBuffering (FLASH_BANK0,FLASH_DATA_READ); // Select Data Read Option
    for(i=0;i<=50;i++)
    {ReadFlashData[i] = * ((uint32_t*) add_ptr++);} // Read value From the Corresponding Memory Location
    __no_operation(); //set breakpoint here to view ReadFlashData buffer
    MAP_FlashCtl_protectSector(FLASH_INFO_MEMORY_SPACE_BANK0,FLASH_SECTOR0);
    }

     

      For testing purpose I wrote 0x01 in SRAM memory location (I attached this code in previous post)

  • 0 in reply to electrolife
    TI__Guru 53555 points

    Dear Keerthana,

    Is this what you are expecting to see?

    I am using a later version of CCS (Version: 6.1.2.00015) and driverLib.

    Chris

  • 0 in reply to Chris Sterzik
    Prodigy 190 points

    Hello chris,

          Thank you. Actually I am able to view the above output while programming MSP432 launchpad using on-board emulator. But when I am trying to use external JTAG emulator, program never exit from while loop (line no 37). This is because of protected memory access. How can I unprotect the memory access.

  • 0 in reply to electrolife
    TI__Guru 53555 points

    Hello Keerthana S.,

    I wanted to show you that with the XDS100v2 external debugger that it does work.  If you look in the Debug window of the screen capture you will see that I am using the external debugger and not the internal XDS110.  Are you in a position to update your CCS?

    Chris

  • 0 in reply to Chris Sterzik
    Prodigy 190 points
    Hai Chris,
    Thank you. I didnt notice the emulator used by you. Now Its working when using CCS 6.1.2.
  • 0 in reply to Chris Sterzik
    Prodigy 30 points
    Hello Chris,
    May i know what version of driverLib you have used ?
  • 0 in reply to saranya devi
    TI__Guru 53555 points
    In this particular example I am using v3_21_00_05.

    Regards,
    Chris
  • 0 in reply to Chris Sterzik
    Prodigy 10 points

    hello chris,

    I couldn't find the driverlib v3_21_00_05 online. 

    can you send us the link for the driver lib v3_21_00_05 .

  • 0 in reply to Chris Sterzik
    Prodigy 30 points
    hello chris,

    I couldn't find the driverlib v3_21_00_05 online.

    can you send us the link for the driver lib v3_21_00_05 .
  • 0 in reply to saranya devi
    TI__Guru 53555 points
    I do not believe this is publicly available. Are you able to find 3_10_00_09? For this example the differences are not relevant as verified by an earlier post.

    Regards,
    Chris
  • 0 in reply to Chris Sterzik
    Prodigy 30 points

    hi chris

       i am not getting an error while dumping the code using xds100v2 jtag emulator . but while trying to access the sram space its getting suspended. flash memory access program is working fine. 

  • 0 in reply to saranya devi
    TI__Guru 53555 points
    Thank you. Can you confirm that you are seeing this issue with the latest version of CCS (6.1.2) and driver lib (3_10_xx_xx)?

    Regards,
    Chris

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