Casio PA-2400W manual O Bootup Library Overview, Function, IOBOX1.DLL, Port

5. I/O Bootup Library

5.1 Overview

The I/O bootup library monitors the connection status of dedicated I/O Box and notifies user of the status.

5.2 Function

This library supports only one function, iobox_chk(). The iobox_chk() function monitors and detects, for a specified period, whether PA-2400W is mounted on I/O Box, and returns the result (mounting detected, timeout error, or error). Each time this function is used, it is necessary to also execute "Permit interrupt, Wait for interrupt and time-out, and Prohibit interrupt". The following diagram shows the range covered by this library.

Fig. 5.1

PA-2400W	User Application
	(1) iobox_chk ( TIME_OUT_SEC ) ;
		(5) Return
		Detection, Timeout
		Error
	IOBOX1.DLL
	Karnel	(4)	Timeout
	(4) Interrupt Signal
	I/O PORT: 0

(2) Mounting (3) I/O Box ON Signal

I/O Box

Because the interrupt signals are detected by their signal levels, they can be detected even if the order of (1) and (2) is changed. (The connection status can be detected whether this function is called before or after the PA-2400W is mounted on I/O Box is mounted, unless a timeout occurs.)

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