Writing/Reading a Structure to Flash Memory

TurnipTruck

Greetings,

I would like to save the values of 100 instances of a structure to flash for reloading at startup. The structure is created in a module and cannot be peristent.

DEFINE_TYPE
Structure MyStruck
{
//There are ten various variable types in the structure
}

DEFINE_VARAIBLE
MyStruck MyStructure[100]

If someone could give me a quick explantion on this, it would be much appreciated.

Thank you.

ericmedley

Well, one could write the values of the stucture to an arrayed variable(s) that are stored in non-vol ram. In order to ensure that you have the most current values, you'd want to periodically update it as opposed to just doing it at shut down. That way if you had a loss of power, you wouldn't loose whatever value was there.

Another method that would work in a similar way is to write the variable into a text file in the master's virt disk. You'd have to write some kind of translator to move the data on and off the disk.

I do this with my very large Cablevision/Satellite TV channels listing.

GSLogic

TurnipTruck wrote:

Greetings,

I would like to save the values of 100 instances of a structure to flash for reloading at startup. The structure is created in a module and cannot be peristent.

DEFINE_VARIABLE
  LONG  lPos
  SLONG slReturn
  SLONG slFile
  SLONG slResult
  CHAR  sXMLString[50000]

DEFINE_FUNCTION fnSAVE_YOUR_STRUCT_NAME()
{
  // Convert To XML
  lPos = 1
  slReturn = VARIABLE_TO_XML(YOUR_STRUCT_NAME, sXMLString, lPos, 0)
  
  // Save Structure To Disk ? XML
  slFile = FILE_OPEN('YOUR_STRUCT_NAME.xml', 2)
  slReturn = FILE_WRITE(slFile, sXMLString, LENGTH_STRING(sXMLString))
  slReturn = FILE_CLOSE(slFile)	
}

DEFINE_FUNCTION fnRELOAD_YOUR_STRUCT_NAME()
{
  // Read XML File
  slFile = FILE_OPEN('YOUR_STRUCT_NAME.xml',1)
  slResult = FILE_READ(slFile, sXMLString, MAX_LENGTH_STRING(sXMLString))
  slResult = FILE_CLOSE (slFile)	
   
  // Convert To XML
  lPos = 1
  slReturn = XML_TO_VARIABLE (YOUR_STRUCT_NAME, sXMLString, lPos, 0)
}

This will do the trick!

TurnipTruck

GSLogic wrote:

[code]
This will do the trick!

Thanks Gary for this example. I will begin experimenting with it shortly. Your very helpful posts in this forum are much appreciated and demonstrate your exceptional skill levels in the field of AMX code writing!