2.4. RenderFPGA Pre Generation Grid

This example demonstrated how to perform design planning/ floorplanning even before generating OpenFPGA netlist.

This rendering scheme is usefull to visualise global signal and clock signal planning

Note

at this stage we dont have information of unique modules and its instances, hence during this rendering every instance is derived from same shapes

Default FPGA grid generation

import logging

import spydrnet as sdn
from spydrnet_physical.util import FPGAGridGen

logger = logging.getLogger("spydrnet_logs")
sdn.enable_file_logging(LOG_LEVEL="INFO")

Create simple FPGA grid

fpga = FPGAGridGen(
    design_name="example_design",
    arch_file="../support_files/vpr_arch_render_demo.xml",
    layout="scalablehetero",
)
fpga.enumerate_grid()
fpga.default_parameters["cbx"][0] = 6
fpga.default_parameters["cby"][1] = 6
dwg = fpga.render_layout(
    filename="_small_layout_render.svg", grid_io=False, markers=False
)

Modify the dimensions This example adds rectangular shape to all the modules in te design

# fpga = FPGAGridGen(
#     design_name="example_design",
#     arch_file="../support_files/vpr_arch_render_demo.xml",
#     layout="complex",
# )
# fpga.enumerate_grid()
# fpga.default_parameters["cbx"][0] = 10
# fpga.default_parameters["cby"][1] = 10
# dwg = fpga.render_layout(grid_io=True)
# fpga.add_style("symbol[id='mcu'] * { fill:#ECCCB2;}")
# dwg.saveas("_ultimate_layout_render.svg", pretty=True, indent=4)

# # %%
# # **Modify the structure**
# #
# # .. image:: ../../../examples/OpenFPGA_basic/_ultimate_layout_render_sized.svg
# #    :width: 60%
# #    :align: center

# # fpga.get_symbol_of_instance("cbx_1__2_")
# # fpga.get_symbol("mcu")
# # surrounding_routing = ["mcu_1__1_"]
# # surrounding_routing += ["cbx_1__2_", "sb_1__2_", "cbx_2__2_"]
# # surrounding_routing += ["cbx_1__0_", "sb_1__0_", "cbx_2__0_"]
# # fpga.merge_symbol(surrounding_routing, "new_mcu_module")

# # fpga.add_style("symbol[id='new_mcu_module'] * { fill:#a8dd00; opacity: 0.5}")
# # dwg.saveas("_ultimate_layout_render_sized.svg", pretty=True, indent=4)