Migen

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Introduction

Migen is a Python module that makes FPGA design possible without VHDL or Verilog. Writing a Migen design for FPGA is like writing Python program. If it's correctly configured with ISE or Quartus, Migen is also capable of generating the bitstream directly.

APF27 and APF51 platforms have been integrated under Migen in July 2014, so designs can be done with it for these APF.

Installing Migen

Requirements

  • Python 3.4 minimum
  • git
  • python setuptools: to use in developpement python module
# On debian:
sudo apt-get install python-setuptools

installation

Migen is an under developpement python3 module. To install it python 3.4 is required.

  • first download the git tree:
$ git clone https://github.com/m-labs/migen.git
  • Then install it as developpement module:
$ cd migen
$ sudo python setup.py develop
  • To be up-to-date with the github tree, do not forget to pull fresh version regularly :
$ cd migen
$ git pull

Blink LED example

APF27

#!/usr/local/bin/python3.4
# -*- coding: utf-8 -*-

from migen import *
from migen.fhdl import *
from migen.build.generic_platform import Pins, IOStandard
from migen.build.platforms import apf27
 
ios = [
    ("user_led", 0, Pins("J2:22"), IOStandard("LVCMOS33"))
]

plat = apf27.Platform()
plat.add_extension(ios)
led = plat.request("user_led", 0)  # led pin on apf27dev
m = Module()
counter = Signal(26)
m.comb += led.eq(counter[25])
m.sync += counter.eq(counter + 1)
plat.build(m)

APF51

#!/usr/local/bin/python3.4
# -*- coding: utf-8 -*-

from migen import *
from migen.fhdl import *
from migen.build.generic_platform import Pins, IOStandard
from migen.build.platforms import apf51
 
ios = [
    ("user_led", 0, Pins("J2:15"), IOStandard("LVCMOS33"))
]
 
plat = apf51.Platform()
plat.add_extension(ios)
led = plat.request("user_led", 0)  # led pin on apf51dev
m = Module()
counter = Signal(26)
m.comb += led.eq(counter[25])
m.sync += counter.eq(counter + 1)
plat.build(m)

APF6SP

#!/usr/local/bin/python3.4
# -*- coding: utf-8 -*-

from migen import *
from migen.fhdl import *
from migen.build.generic_platform import Pins, IOStandard, Subsignal
from migen.build.platforms import apf6sp

ios = [ ("user_led", 0, Pins("HIROSE:D0")),]

plat = apf6sp.Platform()
plat.add_extension(ios)
led = plat.request("user_led", 0)  # led pin on apf6sp_dev

m = apf6sp.PciePllClockedModule(platform=plat)
counter = Signal(26)
m.comb += led.eq(counter[25])
m.sync += counter.eq(counter + 1)

plat.build(m)

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