Hardware
/
litex-boards
mirror of https://github.com/litex-hub/litex-boards.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

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

crosslink_nx_evn: Improve documentation on UART jumpers
This commit is contained in:
enjoy-digital 2020-10-02 09:40:04 +02:00 committed by GitHub
parent de09b10726 8a9fd02768
commit 062fbd6c63
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
litex_boards/platforms/crosslink_nx_evn.py
View File

@ -25,7 +25,8 @@ _io = [
("user_btn", 1, Pins("G15"), IOStandard("LVCMOS33")), # SW3
# 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,
Subsignal("rx", Pins("F16"), IOStandard("LVCMOS33")),
Subsignal("tx", Pins("F18"), IOStandard("LVCMOS33")),

2
litex_boards/targets/crosslink_nx_evn.py
View File

@ -99,7 +99,7 @@ def main():
parser.add_argument("--build", action="store_true", help="Build 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("--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")
builder_args(parser)
soc_core_args(parser)