MSPM0G1506: When writing data to the internal Flash ROM, if the data is set as a global variable, a HardFault interrupt occurs.

Hi,

Your image is not clear, can you upload a new one?

Hi

I have pasted the text as the source code.
I have pasted the image as the execution result.
Please check it.

【SourceCode】

#if __DEBUG_FLASH_WT
static ErrLog_t stDmyLog; //←Global Variables
#endif
#if DEVELOP_MSP430_TO_MSPM0
__attribute__((optnone))
int main(void)
#else
void main(void)
#endif
{

#if DEVELOP_MSP430_TO_MSPM0
uchar bSysRequest;
uchar bTskRequest;
uchar bCnt;

#if __DEBUG_FLASH_WT
ErrLog_t atDmyLog; //←Local variables
uint32_t qDistAdr = 0x00000800;
uint32_t qSize = sizeof(ErrLog_t);

uint32_t qWrtCnt;
uint32_t qWrtAdr;
uint32_t qSctAdr;
volatile DL_FLASHCTL_COMMAND_STATUS stsCmdStatus;
uint32_t *pqSrc;

bArray_fill( (uchar*)&atDmyLog, 0xAA, (uchar)sizeof(ErrLog_t) );
pqSrc = (uint32_t*)&atDmyLog; //←When writing data to a local variable

bArray_fill( (uchar*)&stDmyLog, 0xAA, (uchar)sizeof(ErrLog_t) );
pqSrc = (uint32_t*)&stDmyLog; //←When writing data to a global variable

//erase
qSctAdr = 0x00000800;
CPUSS->CTL &= ~CPUSS_CTL_ICACHE_ENABLE;
DL_FlashCTL_unprotectSector(FLASHCTL, qSctAdr, DL_FLASHCTL_REGION_SELECT_MAIN);
stsCmdStatus = DL_FlashCTL_eraseMemoryFromRAM(FLASHCTL, qSctAdr, DL_FLASHCTL_COMMAND_SIZE_SECTOR);
if (stsCmdStatus == DL_FLASHCTL_COMMAND_STATUS_FAILED)
{
;;;
}
DL_FlashCTL_waitForCmdDone(FLASHCTL);
CPUSS->CTL |= CPUSS_CTL_ICACHE_ENABLE;

//program
CPUSS->CTL &= ~CPUSS_CTL_ICACHE_ENABLE;
for(qWrtCnt = 0; qWrtCnt < qSize; qWrtCnt+=8)
{
qWrtAdr = qDistAdr + qWrtCnt;
DL_FlashCTL_unprotectSector(FLASHCTL, qSctAdr, DL_FLASHCTL_REGION_SELECT_MAIN);
stsCmdStatus = DL_FlashCTL_programMemoryFromRAM64WithECCGenerated(FLASHCTL, qWrtAdr, (uint32_t*)pqSrc); //Addressing the write data (pqSrc)
if (stsCmdStatus == DL_FLASHCTL_COMMAND_STATUS_FAILED)
{
;;;
}
pqSrc += 2;
}
CPUSS->CTL |= CPUSS_CTL_ICACHE_ENABLE;
while(1);
#endif

Hi,

Thanks for your detailed information.

It seems interesting, I will do the test from my side tomorrow and give your feedback as soon as possible.

Regards,

Zoey

Hi,

I have verified from my side. Both global variable and function internal variable can support to write into Flash.

#include "ti_msp_dl_config.h"

/* Address in main memory to write to */
#define MAIN_BASE_ADDRESS (0x00000800)



/* 32-bit data to write to flash */
//uint32_t gData32 = 0x33333333;
volatile DL_FLASHCTL_COMMAND_STATUS gCmdStatus;


int main(void)
{
    SYSCFG_DL_init();
    uint32_t gData32 = 0x33333333;
    uint32_t *pqSrc;

    pqSrc = (uint32_t*)&gData32;

    /* Unprotect sector in main memory with ECC generated by hardware */
    DL_FlashCTL_unprotectSector(
        FLASHCTL, MAIN_BASE_ADDRESS, DL_FLASHCTL_REGION_SELECT_MAIN);
    /* Erase sector in main memory */
    gCmdStatus = DL_FlashCTL_eraseMemoryFromRAM(
        FLASHCTL, MAIN_BASE_ADDRESS, DL_FLASHCTL_COMMAND_SIZE_SECTOR);

    DL_FlashCTL_unprotectSector(FLASHCTL, MAIN_BASE_ADDRESS, DL_FLASHCTL_REGION_SELECT_MAIN);
    gCmdStatus = DL_FlashCTL_programMemoryFromRAM32WithECCGenerated(FLASHCTL, (MAIN_BASE_ADDRESS), (uint32_t*)pqSrc);
    while(1);

}

Can you double check from your side according to my demo code

Regards,

Zoey

Or you can upload your simplified version of the project so that I can help you debug it quickly.

Hi

Thank you for your reply.
The model number of the microcontroller I checked was "MSPM0G3506T".
I'm sorry.
I'm sorry to trouble you, but could you please check it here as well?

Hi,

It is the same, and my test MCU number is MSPM0G3507.

Hi

I'm sorry. I was told that this issue does not occur there, so I investigated it again here.
Currently, optimization is set to "-z",
but I found that if I set it to "-0", the HardFault does not occur.
I tried adding the volatile modifier to the global variable that stores the write data,
but a HardFault occurred.
When creating source code with optimization "-z",
can you tell me if there is anything I should be careful of or if you know of any causes for the issue?

Hi,

It seems strange, but I can not reproduce your phenomena from my side.

Can you give a simplified code that can reproduce this?

Regards,

Zoey