Hi,Working with stm8l15 with lora.When storing more than one 32 bit variable in eeprom memory continuously, downlink is not receiving and it gets queueing. What will be the reason.

[Gswam.1]

How to store more than one 32 bit variable in eeprom memory in while loop and also to receive downlink?

Here,I have attached the code too.

[Cristian Gyorgy · Accepted solution]

I could not open the code you posted, but take in count that a programming takes 6 ms if not writing on already erased location.

If you need shorter write times: prepare the locations in advance by erasing them and write your data in blocks (64 bytes). A block write is just as fast as a byte/word write.

[Gswam.1]

Hi Cristian Gyorgy,

This is the main code

int main( void )

{

  LoRaMacPrimitives_t LoRaMacPrimitives;

  LoRaMacCallback_t LoRaMacCallbacks;

  MibRequestConfirm_t mibReq;

  BoardInitMcu( );

  BoardInitPeriph( );

Flash_setup();

  DeviceState = DEVICE_STATE_INIT;

  printf("ClassA app start\r\n");

count = FLASH_ReadByte(0x1002);

 count <<= 8;

 count |= FLASH_ReadByte(0x1003);

 count <<= 8;

 count |= FLASH_ReadByte(0x1004);

 count <<= 8;

 count |= FLASH_ReadByte(0x1005);

count1 = FLASH_ReadByte(0x1006);

 count1 <<= 8;

 count1 |= FLASH_ReadByte(0x1007);

 count1 <<= 8;

 count1 |= FLASH_ReadByte(0x1008);

 count1 <<= 8;

 count1 |= FLASH_ReadByte(0x1009);

Count_Read = count;

Count1_Read = count1;

printf("Count_Read:%lu\n",Count_Read);

printf("Count1_Read:%lu\n",Count1_Read);

  while( 1 )

  {

if(joined_finish==1)

 { 

  count++;

count1++;

FLASH_Unlock(FLASH_MemType_Data);

    FLASH_ProgramByte(0x1002, count>>24);

    FLASH_ProgramByte(0x1003, count>>16);

   FLASH_ProgramByte(0x1004, count>>8);

   FLASH_ProgramByte(0x1005, count);

FLASH_ProgramByte(0x1006, count1>>24);

    FLASH_ProgramByte(0x1007, count1>>16);

   FLASH_ProgramByte(0x1008, count1>>8);

   FLASH_ProgramByte(0x1009, count1);

   FLASH_Lock(FLASH_MemType_Data);

 } 

// here it comes switch case statement

   }

[Cristian Gyorgy]

FLASH_ProgramByte(0x1002, count>>24);
FLASH_ProgramByte(0x1003, count>>16);
FLASH_ProgramByte(0x1004, count>>8);
FLASH_ProgramByte(0x1005, count);
FLASH_ProgramByte(0x1006, count1>>24);
FLASH_ProgramByte(0x1007, count1>>16);
FLASH_ProgramByte(0x1008, count1>>8);
FLASH_ProgramByte(0x1009, count1);

Every line in the code above will take 6 ms: 8x6=48 ms programming time.

Instead you could do only 2 writes, by writing only 2 4-byte words (at a word aligned address!): 2x6=12 ms,

Or, read first the block where you want to do the write into SRAM, fill in the 8 bytes and than write the 64/128 bytes block back in only 6ms.

I don't know your compiler, what function has defined for the word/block programming, but for sure it has one.

[Gswam.1]

Ya. Thank you. It is worked by using word. Downlink is also working and storing also happening.