CYT2B95CAE - Work flash cannot store data and microcontroller's fault is set or resets

[mandar_bhat]

Hi ,

I am using sample code from TVII_Sample_Driver_Library_7.2.0 library example code of work flash

it is storing some data in workflash and reading data from work flash. ( I want to use this to store some application specific settings data similar to eeprom).

I implemented the sample function in my application and found that fault is generated and my call stack list is lost, as soon as i execute Erase API => (Cy_FlashSectorErase(SectorAddr, CY_FLASH_DRIVER_BLOCKING))

or also may be any other API related to work flash

As my call stack is lost , so after exiting this BasicWorkFlashBlockingTest function, my stack pointer cannot return to the place where this function was invoked, so sytem fault is generated.

I am running this code from M4 code-flash.

Microcontroller's M0+ Core is also initialized.

//***************************************************************************************

// Initialization
Cy_FlashInit(false /*blocking*/);

// Test for Small Sector
BasicWorkFlashBlockingTest(TEST_W_SS_ADDR, CY_WORK_SES_SIZE_IN_BYTE);

//***************************************************************************************

// In this routine, whole one sector erased/written/read/verified
void BasicWorkFlashBlockingTest(uint32_t SectorAddr, uint32_t SectorSizeInByte)
{
uint32_t* p_TestFlsTop = (uint32_t*)SectorAddr;

uint32_t SectorSizeInWord = SectorSizeInByte / 4ul;

/** Erasing **/
// Erase
Cy_FlashSectorErase(SectorAddr, CY_FLASH_DRIVER_BLOCKING);

// Verify
Cy_WorkFlashBlankCheck(SectorAddr, CY_FLASH_DRIVER_BLOCKING);

/** Programming **/
for(uint32_t i_addr = SectorAddr, i_addrOffset = 0; i_addr < SectorAddr + SectorSizeInByte; i_addr+=4, i_addrOffset+=4)
{
uint32_t i_dataPos = i_addrOffset % PROGRAM_DATA_SIZE_IN_BYTE;

// Flash
Cy_FlashWriteWork(i_addr, (uint32_t*)&programData[i_dataPos], CY_FLASH_DRIVER_BLOCKING);
}

// Verify
uint32_t* pProgramData = (uint32_t*)programData;
for(uint32_t i_wordId = 0; i_wordId < SectorSizeInWord; i_wordId++)
{
uint32_t i_dataPos = i_wordId % PROGRAM_DATA_SIZE_IN_WORD;
CY_ASSERT(p_TestFlsTop[i_wordId] == pProgramData[i_dataPos]);
}

/** Erasing Again **/
// Erase
/*Cy_FlashSectorErase(SectorAddr, CY_FLASH_DRIVER_BLOCKING); */

// Verify
/*Cy_WorkFlashBlankCheck(SectorAddr, CY_FLASH_DRIVER_BLOCKING); */
}

Please suggest any ideas to make it work.

Thanks in Advance.