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Merge pull request #108 from daveshah1/dave/nx-evn-doc 

crosslink_nx_evn: Improve documentation on UART jumpers
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enjoy-digital 2020-10-02 09:40:04 +02:00 committed by GitHub
parent de09b10726 8a9fd02768
commit 062fbd6c63
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2 changed files with 3 additions and 2 deletions
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3
litex_boards/platforms/crosslink_nx_evn.py
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@ -25,7 +25,8 @@ _io = [
("user_btn", 1, Pins("G15"), IOStandard("LVCMOS33")), # SW3 ("user_btn", 1, Pins("G15"), IOStandard("LVCMOS33")), # SW3
# Section 6.2 UART Topology # Section 6.2 UART Topology
# Requires installation of 0-ohm jumpers to properly route signals # Requires installation of 0-ohm jumpers R15 and R17 to properly route signals
# Note that it is R15 and R17, not R16 and R17 as stated in the user guide
("serial", 0, ("serial", 0,
Subsignal("rx", Pins("F16"), IOStandard("LVCMOS33")), Subsignal("rx", Pins("F16"), IOStandard("LVCMOS33")),
Subsignal("tx", Pins("F18"), IOStandard("LVCMOS33")), Subsignal("tx", Pins("F18"), IOStandard("LVCMOS33")),

2
litex_boards/targets/crosslink_nx_evn.py
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@ -99,7 +99,7 @@ def main():
parser.add_argument("--build", action="store_true", help="Build bitstream") parser.add_argument("--build", action="store_true", help="Build bitstream")
parser.add_argument("--load", action="store_true", help="Load bitstream") parser.add_argument("--load", action="store_true", help="Load bitstream")
parser.add_argument("--sys-clk-freq", default=75e6, help="System clock frequency (default=75MHz)") parser.add_argument("--sys-clk-freq", default=75e6, help="System clock frequency (default=75MHz)")
parser.add_argument("--serial", default="serial", help="UART Pins: serial or serial_pmod[0-2] (default=serial)") parser.add_argument("--serial", default="serial", help="UART Pins: serial (requires R15 and R17 to be soldered) or serial_pmod[0-2] (default=serial)")
parser.add_argument("--prog-target", default="direct", help="Programming Target: direct or flash") parser.add_argument("--prog-target", default="direct", help="Programming Target: direct or flash")
builder_args(parser) builder_args(parser)
soc_core_args(parser) soc_core_args(parser)