litex/build/lattice/programmer.py

   1 import os
   2 import subprocess
   3
   4 from litex.build.generic_programmer import GenericProgrammer
   5 from litex.build import tools
   6
   7
   8 # XXX Lattice programmer need an .xcf file, will need clean up and support for more parameters
   9 _xcf_template = """
  10 <?xml version='1.0' encoding='utf-8' ?>
  11 <!DOCTYPE        ispXCF    SYSTEM    "IspXCF.dtd" >
  12 <ispXCF version="3.4.1">
  13     <Comment></Comment>
  14     <Chain>
  15         <Comm>JTAG</Comm>
  16         <Device>
  17             <SelectedProg value="TRUE"/>
  18             <Pos>1</Pos>
  19             <Vendor>Lattice</Vendor>
  20             <Family>LatticeECP3</Family>
  21             <Name>LFE3-35EA</Name>
  22             <File>{bitstream_file}</File>
  23             <Operation>Fast Program</Operation>
  24         </Device>
  25     </Chain>
  26     <ProjectOptions>
  27         <Program>SEQUENTIAL</Program>
  28         <Process>ENTIRED CHAIN</Process>
  29         <OperationOverride>No Override</OperationOverride>
  30         <StartTAP>TLR</StartTAP>
  31         <EndTAP>TLR</EndTAP>
  32         <VerifyUsercode value="FALSE"/>
  33     </ProjectOptions>
  34     <CableOptions>
  35         <CableName>USB2</CableName>
  36         <PortAdd>FTUSB-0</PortAdd>
  37         <USBID>Dual RS232-HS A Location 0000 Serial A</USBID>
  38         <JTAGPinSetting>
  39             TRST    ABSENT;
  40             ISPEN    ABSENT;
  41         </JTAGPinSetting>
  42     </CableOptions>
  43 </ispXCF>
  44 """
  45
  46
  47 class LatticeProgrammer(GenericProgrammer):
  48     needs_bitreverse = False
  49
  50     def load_bitstream(self, bitstream_file):
  51         xcf_file = bitstream_file.replace(".bit", ".xcf")
  52         xcf_content = _xcf_template.format(bitstream_file=bitstream_file)
  53         tools.write_to_file(xcf_file, xcf_content)
  54         subprocess.call(["pgrcmd", "-infile", xcf_file])