Quatech 802.11B/G manual Intena

Airborne Enterprise Module Databook				Quatech, Inc.
	Command	Name	Description
	(Hex)
	0x10	INTENA	The INTENA command will enable interrupts from the module.
			For this command, the PARM1 field will define the interrupts to
			be enabled.
			The definition of the PARM1 field is as follows:
			B7	Interrupt Sense – Determines the asserted state of
				the interrupt pin. If this bit is set, the interrupt pin
				will be active high, otherwise the interrupt pin will be
				active low.
			B1	TX Interrupt – If this bit is set, the interrupt pin will
				be asserted when there is space available in the Tx
				buffer.
			B0	RX Interrupt – If this bit is set, the interrupt pin will
				be asserted when there is Rx data available.
	0x20	INTDIS	The INTDIS command will disable interrupts from the module.
			For this command, the PARM1 field will define the interrupts to
			be disabled.
			The definition of the PARM1 field is as follows:
			B1	TX Interrupt – If this bit is set, The Tx interrupt
				function will be disabled.
			B0	RX Interrupt – If this bit is set, the Rx interrupt
				function will be disabled.
	0x40	TXDATA	The TXDATA command is used to send data to the module to
			be transmitted on the wireless link.
			The host may send at most the number of bytes indicated by the
			Tx Buffer Available field in the Rx Message Header. The actual
			length sent by the host is determined by the 16 bit value in
			PARM2. The value in PARM2 is little-endian (LSB first) and
			must be less than or equal to the number in the Tx Buffer
			Available field. Any bytes sent in excess of this number will be
			ignored.
	0x80	RXDATA	The RXDATA command is used to receive data from the
			module that has been received on the wireless link.
			The host may receive at most the number of bytes indicated by
			the Rx Data Available field in the Rx Message Header. The
			actual number of bytes received by the host is determined by
			the 16 bit value in PARM2. The value in PARM2 is little-endian
			(LSB first) and must be less than or equal to the number in the
			Rx Data Available field. If additional clock cycles are sent to the
			module beyond this number, meaningless data will be returned.

The TXDATA and RXDATA commands can be combined for full-duplex operation. For example, a command byte of 0xC0 would be a TXDATA and RXDATA command combined. The result of this command would be that the module would accept data being shifted in as Tx data, while at the same time, Rx data would be shifted out. In this case, the number of bytes transferred for TXDATA must be equal to the number of bytes transferred for RXDATA. The PARM2 parameter will indicate the number of bytes to be transferred for both the TXDATA and RXDATA commands.

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