UG-VIPSUITE	2D FIR Filter Control Registers	5-5
	2015.01.23

Signal		Direction		Description
din_ready		Output		din_N port Avalon-ST ready signal. The IP core asserts
				this signal when it is able to receive data.
din_startofpacket		Input		din_N port Avalon-ST startofpacket signal. This signal
				marks the start of an Avalon-ST packet.
din_valid		Input		din_N port Avalon-ST valid signal. This signal identifies
				the cycles when the port must input data.
dout_data		Output		dout port Avalon-ST data bus. This bus enables the
				transfer of pixel data out of the IP core.
dout_endofpacket		Output		dout_N port Avalon-ST endofpacket signal. This signal
				marks the end of an Avalon-ST packet.
dout_ready		Input		dout_N port Avalon-ST ready signal. The downstream
				device asserts this signal when it is able to receive data.
dout_startofpacket		Output		dout_N port Avalon-ST startofpacket signal. This signal
				marks the start of an Avalon-ST packet.
dout_valid		Output		dout_N port Avalon-ST valid signal. The IP core asserts
				this signal when it produces data.

2D FIR Filter Control Registers

Table 5-3: 2D FIR Filter Control Register Map

The width of each register in the 2D FIR Filter control register map is 32 bits. The coefficient registers use integer, signed 2’s complement numbers. To convert from fractional values, simply move the binary point right by the number of fractional bits specified in the parameter editor.

Note: The control data is read once at the start of each frame and is buffered inside the IP core, so the registers can be safely updated during the processing of a frame.

Address		Register		Description
0		Control		Bit 0 of this register is the Go bit, all other bits are unused.
				Setting this bit to 0 causes the IP core to stop the next time
				control information is read.
1		Status		Bit 0 of this register is the Status bit, all other bits are unused.
2		Coefficient 0		The coefficient at the top left (origin) of the filter kernel.
3		Coefficient 1		The coefficient at the origin across to the right by one.
4		Coefficient 2		The coefficient at the origin across to the right by two.

2D FIR Filter IP Core	Altera Corporation

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	5-6		2D FIR Filter Control Registers				UG-VIPSUITE
						2015.01.23
			Address		Register		Description

n	Coefficient n

The coefficient at position:

•Row (where 0 is the top row of the kernel) is the integer value through the truncation of (n–2) / (filter kernel width)

.

•Column (where 0 is the far left row of the kernel) is the remainder of (n–2) / (filter kernel width).

Altera Corporation	2D FIR Filter IP Core

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