File_Open()

File_Open(pFileName), Byte

pFileName: The name of the file to open for reading (maximum length 12 characters, including dot and extension).

Return Status:

• cErrOK: Success.

• cErrNotFound: File not found.

• cErrInUse: File number is already in use.

• cErrRWError: Read/write error.

Open a File for Reading

This procedure opens an existing file for reading only. The maximum name length is 12 characters, including the file extension.

Example:

File_Open("MyFile.txt")

Notes:

• Before reading from a file, it must be opened using File_Open().

• When the file is opened, the read pointer is moved to the beginning of the file.

TftSetUp(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