ConnectionPattern

class util.ConnectionPattern.ConnectionPattern(sizex, sizey)

This creates a connection patterns (ConnectPointList) based on pre-defined rule

Methods:

__init__	Initialise FPGA parameters
get_htree	Returns H-Tree of specific size
auto_select	Auto implements the global tree with crop and scale operations
add_htree	Returns HTree pattern fo the given grid size
reset	Removes all the ConnectionPoints from the pattern
get_fishbone	Returns fishbone pattern for the given grid size
render_pattern	Renders the connection points

Attributes:

svg_main	Returns the svgwrite drawing object, call after running render_pattern
connections	Returns the ConnectPointList in current pattern

__init__(sizex, sizey)

Initialise FPGA parameters

Parameters

• sizex (int) – Width of FPGA grid

• sizey (int) – Size of FPGA grid

property svg_main

Returns the svgwrite drawing object, call after running render_pattern

property connections

Returns the ConnectPointList in current pattern

static get_htree(size, root=0, side=0, repeat=1)

Returns H-Tree of specific size

Parameters

• root (int) – Extension in the root connection (Default=0)

• side (int) – Extension in the side connection (Default=0)

• repeat (int) – NUmber of sides on each direction (Default=1)

^    ^         ^     ^
|    |         |     |
|    | root    |     |
+---------+----------+
|    |    |    |     | ^
|    |    |    |     | |  SIDE
v    v    |    v     v v
          |
^    ^    |
+-+--+    |
  +       |
REPEAT    +

auto_select()

Auto implements the global tree with crop and scale operations

TODO: NotImplemented

add_htree(n=3)

Returns HTree pattern fo the given grid size

This method auto creates multiple levels of HTree from the given grid size. Minimum size H-Tree is 5x5

Parameters

n (int) – 2^n, Number representng size of the grid

reset()

Removes all the ConnectionPoints from the pattern

get_fishbone(width=None, height=None, steps=1, x_margin=(0, 0), y_margin=(0, 0))

Returns fishbone pattern for the given grid size

Spine is created at the center of the grid, to change bias when grid is symetric change xbias and ybias parameter

x_margin(tuple(int, int)): Skips the repective grid connectivity y_margin(tuple(int, int)): Skips the repective grid connectivity

render_pattern(scale=20, title=None, add_module_labels=False)

Renders the connection points