File_EOF() | TFT & EPD Graphic Library 2

Syntax

File_EOF(), Bit

Value	Meaning
0	No, the end of the file has not been reached.
1	Yes, the end of the file has been reached.

Check if End of File (EOF) is Reached

File_EOF is a variable used to check if the end of a file (EOF) has been reached while reading a file.

When a file is being read, it is important to detect when there is no more data to read, to avoid errors or infinite loops.

File_EOF()

Prevent Blocking Loop with EOF:

File_EOF() is useful to prevent situations where a program might get stuck in an infinite loop if the end of the file is not handled correctly.

By checking File_EOF(), you can safely terminate file reading when all content has been processed.

When to Use:

During file reading: Whenever you're reading a file, you can use File_EOF() to ensure that you don't attempt to read beyond the end of the file.
Prevent blocking behavior: Checking EOF prevents your code from getting stuck in a read loop after the file ends.

Ensure that you call File_Open() before using File_EOF(), as this variable only applies to files that are open for reading.
File_EOF() helps avoid errors like Read/Write error (RWError) when you try to read past the file’s content.

TftSetUp(0, 0) 'Set screen

TftResetScreen(BLACK) 'Reset screen

TftSetSndFont(0,0) 'Set Font0

While File_Init() <> cErrOK : Wend 'Initialize SD Card

TftPrintSndString("Sd Initialization OK",1,0,0,1,GREEN,BLACK,0) 'Confirm Initialize SD Card

While File_Open("Open.txt") <> cErrOK : Wend 'Open file Open.txt to edit data

TftPrintSndString("Open Open.txt OK",1,0,2,1,GREEN,BLACK,0) 'Confirm Open.txt is open

bCounter = 0 'Print position counter

TftPrintSndChar(File_ReadByte(),1,bCounter,3,1,GREEN,BLACK,0) 'Print data as text

If File_EOF() = 1 Then Break 'Loop till end of file

Inc bCounter

Loop

File_Close() 'close file

TftPrintSndString("Close Open.txt OK",1,0,4,1,GREEN,BLACK,0) 'Confirm close file

File_EOF()