EEPRMA2 M95 writedata bug?

[CBras]

Hi,

I'm using the latest EEPRMA2 drivers for the M95M04 EEPROM.

I'm trying to store data in EEPROM on a specific address.

In the following example, I expect one byte to be written to address 5.

uint8_t a = 10;

uint32_t targetAddr = 5;

EEPRMA2_M95_WriteData(EEPRMA2_M95M04_0, &a, targetAddr , sizeof(a));

Stepping into EEPRMA2_M95_WriteData, we go into M95_spi_WriteData which still has the size of 1, but moving to the step where EEPRMA2_SPI_SendBuffer is called, the size has changed to 6 bytes to be written. It looks like the size is defined from the remainder, which is based on the following equation: ( targetAddress + Size ) % PageSize

I don't see how this can be correct implementation?

Edit: I seems like this person has the same problem https://github.com/STMicroelectronics/X-CUBE-EEPRMA1/issues/4

[SikandarLF]

int32_t M95_spi_WriteData(M95_Object_t *pObj, uint8_t * pData, const uint32_t TarAddr ,
 const uint16_t PageSize, const uint16_t Size )
{
 int32_t status = M95_OK;
 
 uint32_t targetAddress = TarAddr;
 uint16_t remainingSize = Size;
 
 // Calculate the starting page and offset
 uint16_t startOffset = TarAddr % PageSize;
 uint16_t offset = startOffset;
 
 
 // Check for invalid inputs
 if (pObj == NULL || pData == NULL || PageSize == 0 || remainingSize == 0) {
 return M95_ERROR; // Return an error code indicating invalid inputs
 } 
 
 if (pObj->IO.IsReady( pObj->IO.Address ) !=M95_OK)
 {
 return M95_ERROR;
 } 
 
 // Iterate over the pages and write the data
 while (remainingSize > 0) 
 {
 uint16_t bytesToWrite = (remainingSize < PageSize - offset) ? remainingSize : (PageSize - offset);
 
 /* Condition Matters only for 4Kb SPI ie M95040, for others EEPROMEX_WRITE & EEPROMEX_UPWRITE are same */
 if (pObj->IO.Address == 0xC6) 
 { 
 if (targetAddress < 256)
 {
 status = pObj->IO.WriteBuffer( pData, targetAddress, pObj->IO.Address, bytesToWrite ,EEPROMEX_WRITE);
 }
 else
 {
 status = pObj->IO.WriteBuffer( pData, targetAddress, pObj->IO.Address, bytesToWrite ,EEPROMEX_UPWRITE);
 }
 }
 else
 {
 status = pObj->IO.WriteBuffer( pData, targetAddress, pObj->IO.Address, bytesToWrite ,EEPROMEX_WRITE);
 }
 
 pObj->IO.Delay(6);
 
 // Update the pointers and sizes for the next page
 pData += bytesToWrite;
 targetAddress += bytesToWrite;
 remainingSize -= bytesToWrite;
 offset = targetAddress % PageSize;
 
 // Wait for the SPI interface to be ready before proceeding to the next page
 while( pObj->IO.IsReady( pObj->IO.Address ) != M95_OK ) {};
 }
 return status; 
}