TlpControl

PURPOSE

Direct connection to the reader.

PROTOTYPE

Trap: TlpErr TlpControl (UInt16 refNum, UInt8 command, const UInt8 *commandData, UInt16 commandDataLength, UInt8 *responseData, UInt16 *responseDataLength, UInt16 responseTimeOut)

PARAMETERS

command	IN		command code to send
commandData	IN		data to send
commandDataLength	IN		size of commandData
responseData		OUT	data received
responseDataLength	IN	OUT	size of responseData
responseTimeOut	IN		response timeout in seconds

DESCRIPTION

Send a command and commandData to the reader, and fill responseData with a received response up to responseDataLength bytes. On exit responseDataLength is set to the actual number of bytes read. Both commandData and responseData can be NULL.

This function allow to use reader features not implemented in this library. The return value can be any TlpErr code. If no response is received within responseTimeOut seconds, the PalmOS serial functions will return a timeout error and thus this library will return tlpErrPalmOS. Use value 0 to wait infinitely.

SEE ALSO

enum TlpErr.