Merge FPGA repository back into UHD repository

The FPGA codebase was removed from the UHD repository in 2014 to reduce
the size of the repository. However, over the last half-decade, the
split between the repositories has proven more burdensome than it has
been helpful. By merging the FPGA code back, it will be possible to
create atomic commits that touch both FPGA and UHD codebases. Continuous
integration testing is also simplified by merging the repositories,
because it was previously difficult to automatically derive the correct
UHD branch when testing a feature branch on the FPGA repository.

This commit also updates the license files and paths therein.

We are therefore merging the repositories again. Future development for
FPGA code will happen in the same repository as the UHD host code and
MPM code.

== Original Codebase and Rebasing ==

The original FPGA repository will be hosted for the foreseeable future
at its original local location: https://github.com/EttusResearch/fpga/

It can be used for bisecting, reference, and a more detailed history.

The final commit from said repository to be merged here is
05003794e2da61cabf64dd278c45685a7abad7ec. This commit is tagged as
v4.0.0.0-pre-uhd-merge.

If you have changes in the FPGA repository that you want to rebase onto
the UHD repository, simply run the following commands:

- Create a directory to store patches (this should be an empty
  directory):

    mkdir ~/patches

- Now make sure that your FPGA codebase is based on the same state as
  the code that was merged:

    cd src/fpga # Or wherever your FPGA code is stored
    git rebase v4.0.0.0-pre-uhd-merge

  Note: The rebase command may look slightly different depending on what
  exactly you're trying to rebase.

- Create a patch set for your changes versus v4.0.0.0-pre-uhd-merge:

    git format-patch v4.0.0.0-pre-uhd-merge -o ~/patches

  Note: Make sure that only patches are stored in your output directory.
  It should otherwise be empty. Make sure that you picked the correct
  range of commits, and only commits you wanted to rebase were exported
  as patch files.

- Go to the UHD repository and apply the patches:

    cd src/uhd # Or wherever your UHD repository is stored
    git am --directory fpga ~/patches/*
    rm -rf ~/patches # This is for cleanup

== Contributors ==

The following people have contributed mainly to these files (this list
is not complete):

Co-authored-by: Alex Williams <alex.williams@ni.com>
Co-authored-by: Andrej Rode <andrej.rode@ettus.com>
Co-authored-by: Ashish Chaudhari <ashish@ettus.com>
Co-authored-by: Ben Hilburn <ben.hilburn@ettus.com>
Co-authored-by: Ciro Nishiguchi <ciro.nishiguchi@ni.com>
Co-authored-by: Daniel Jepson <daniel.jepson@ni.com>
Co-authored-by: Derek Kozel <derek.kozel@ettus.com>
Co-authored-by: EJ Kreinar <ej@he360.com>
Co-authored-by: Humberto Jimenez <humberto.jimenez@ni.com>
Co-authored-by: Ian Buckley <ian.buckley@gmail.com>
Co-authored-by: Jörg Hofrichter <joerg.hofrichter@ni.com>
Co-authored-by: Jon Kiser <jon.kiser@ni.com>
Co-authored-by: Josh Blum <josh@joshknows.com>
Co-authored-by: Jonathon Pendlum <jonathan.pendlum@ettus.com>
Co-authored-by: Martin Braun <martin.braun@ettus.com>
Co-authored-by: Matt Ettus <matt@ettus.com>
Co-authored-by: Michael West <michael.west@ettus.com>
Co-authored-by: Moritz Fischer <moritz.fischer@ettus.com>
Co-authored-by: Nick Foster <nick@ettus.com>
Co-authored-by: Nicolas Cuervo <nicolas.cuervo@ettus.com>
Co-authored-by: Paul Butler <paul.butler@ni.com>
Co-authored-by: Paul David <paul.david@ettus.com>
Co-authored-by: Ryan Marlow <ryan.marlow@ettus.com>
Co-authored-by: Sugandha Gupta <sugandha.gupta@ettus.com>
Co-authored-by: Sylvain Munaut <tnt@246tNt.com>
Co-authored-by: Trung Tran <trung.tran@ettus.com>
Co-authored-by: Vidush Vishwanath <vidush.vishwanath@ettus.com>
Co-authored-by: Wade Fife <wade.fife@ettus.com>

1 files changed, 157 insertions, 0 deletions

diff --git a/fpga/usrp3/top/b2xxmini/b205.ucf b/fpga/usrp3/top/b2xxmini/b205.ucf
new file mode 100644
index 000000000..9d1b89fd8
--- /dev/null
+++ b/fpga/usrp3/top/b2xxmini/b205.ucf
@@ -0,0 +1,157 @@
+
+#### FX3 Lines ##############################################################
+# GPIF Data lines
+NET "FX3_DQ<0>"  LOC = "T22" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<1>"  LOC = "T21" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<2>"  LOC = "M19" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<3>"  LOC = "R22" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<4>"  LOC = "R20" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<5>"  LOC = "R19" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<6>"  LOC = "P20" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<7>"  LOC = "N19" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<8>"  LOC = "P22" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<9>"  LOC = "N20" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<10>" LOC = "P21" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<11>" LOC = "M21" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<12>" LOC = "N22" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<13>" LOC = "L22" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<14>" LOC = "M22" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<15>" LOC = "P19" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<16>" LOC = "D21" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<17>" LOC = "F22" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<18>" LOC = "C22" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<19>" LOC = "D22" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<20>" LOC = "E22" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<21>" LOC = "B22" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<22>" LOC = "B21" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<23>" LOC = "F20" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<24>" LOC = "G19" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<25>" LOC = "D20" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<26>" LOC = "E20" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<27>" LOC = "D19" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<28>" LOC = "J19" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<29>" LOC = "C20" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<30>" LOC = "F19" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+NET "FX3_DQ<31>" LOC = "C18" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # FX3 Parallel Data
+
+NET "FX3_PCLK" LOC = "H20" | IOSTANDARD = LVCMOS18 | DRIVE = 6 | SLEW = SLOW; # FX3 Data Synchronization Clock, called IFCLK in B200
+
+# GPIF Control Lines
+NET "FX3_CTL0" LOC = "M20" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # SLCSn
+NET "FX3_CTL1" LOC = "J22" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # SLWRn
+NET "FX3_CTL2" LOC = "J21" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # SLOEn
+NET "FX3_CTL3" LOC = "K22" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # SLRDn
+NET "FX3_CTL4" LOC = "M18" | IOSTANDARD = LVCMOS18 ; # FLAG_A
+NET "FX3_CTL5" LOC = "L19" | IOSTANDARD = LVCMOS18 ; # FLAG_B
+NET "FX3_CTL6" LOC = "H22" | IOSTANDARD = LVCMOS18 ; #
+NET "FX3_CTL7" LOC = "L20" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # PKTENDn
+NET "FX3_CTL8" LOC = "K19" | IOSTANDARD = LVCMOS18 ; #
+NET "FX3_CTL9" LOC = "K20" | IOSTANDARD = LVCMOS18 ; #
+##FX3_CTL10 is not for general signaling
+NET "FX3_CTL11" LOC = "H21" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # A1
+NET "FX3_CTL12" LOC = "G22" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # A0
+
+
+#### AD9364 #################################################################
+NET "CAT_RESETn" LOC = "T3" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Transceiver Global Reset
+NET "CAT_EN_AGC" LOC = "AA4" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Transceiver AGC Enable
+NET "CAT_EN"     LOC = "V3"  | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Transceiver Globe Enable
+NET "CAT_TXnRX"  LOC = "Y4"  | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Transceiver Globe TX and RX control
+
+# SPI
+NET "CAT_SPI_EN" LOC = "T4" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Transceiver Controller SPI Latch
+NET "CAT_SPI_CLK" LOC = "Y3" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Transceiver Controller SPI Serial Clock
+NET "CAT_SPI_DI" LOC = "AA2" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Transceiver Controller SPI Data In
+NET "CAT_SPI_DO" LOC = "U4" | IOSTANDARD = LVCMOS18 | PULLUP; # Transceiver Controller SPI Data Out
+
+# Control Lines
+NET "CAT_CTL_OUT<0>"  LOC = "D2" | IOSTANDARD = LVCMOS18 ; #
+NET "CAT_CTL_OUT<1>"  LOC = "AB4" | IOSTANDARD = LVCMOS18 ; #
+NET "CAT_CTL_OUT<2>"  LOC = "AB3" | IOSTANDARD = LVCMOS18 ; #
+NET "CAT_CTL_OUT<3>"  LOC = "K3" | IOSTANDARD = LVCMOS18 ; #
+NET "CAT_CTL_OUT<4>"  LOC = "AB2" | IOSTANDARD = LVCMOS18 ; #
+NET "CAT_CTL_OUT<5>"  LOC = "T7" | IOSTANDARD = LVCMOS18 ; #
+NET "CAT_CTL_OUT<6>"  LOC = "U8" | IOSTANDARD = LVCMOS18 ; #
+NET "CAT_CTL_OUT<7>"  LOC = "W4" | IOSTANDARD = LVCMOS18 ; #
+NET "CAT_CTL_IN<0>"   LOC = "H5" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; #
+NET "CAT_CTL_IN<1>"   LOC = "H3" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; #
+NET "CAT_CTL_IN<2>"   LOC = "J4" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; #
+NET "CAT_CTL_IN<3>"   LOC = "D1" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; #
+
+# Rx Bus
+NET "CAT_P0_D<0>"  LOC = "H1" | IOSTANDARD = LVCMOS18; # Transceiver Parallel Data. Bank3 LB.
+NET "CAT_P0_D<1>"  LOC = "H2" | IOSTANDARD = LVCMOS18; # Transceiver Parallel Data. Bank3 LB.
+NET "CAT_P0_D<2>"  LOC = "G1" | IOSTANDARD = LVCMOS18; # Transceiver Parallel Data. Bank3 LT.
+NET "CAT_P0_D<3>"  LOC = "G3" | IOSTANDARD = LVCMOS18; # Transceiver Parallel Data. Bank3 LT.
+NET "CAT_P0_D<4>"  LOC = "F1" | IOSTANDARD = LVCMOS18; # Transceiver Parallel Data. Bank3 LT.
+NET "CAT_P0_D<5>"  LOC = "F2" | IOSTANDARD = LVCMOS18; # Transceiver Parallel Data. Bank3 LT.
+NET "CAT_P0_D<6>"  LOC = "E1" | IOSTANDARD = LVCMOS18; # Transceiver Parallel Data. Bank3 LT.
+NET "CAT_P0_D<7>"  LOC = "E3" | IOSTANDARD = LVCMOS18; # Transceiver Parallel Data. Bank3 LT.
+NET "CAT_P0_D<8>"  LOC = "L1" | IOSTANDARD = LVCMOS18; # Transceiver Parallel Data. Bank3 LB.
+NET "CAT_P0_D<9>"  LOC = "L3" | IOSTANDARD = LVCMOS18; # Transceiver Parallel Data. Bank3 LB.
+NET "CAT_P0_D<10>" LOC = "M1" | IOSTANDARD = LVCMOS18; # Transceiver Parallel Data. Bank3 LB.
+NET "CAT_P0_D<11>" LOC = "M2" | IOSTANDARD = LVCMOS18; # Transceiver Parallel Data. Bank3 LB.
+
+# Tx Bus
+NET "CAT_P1_D<0>"  LOC = "T1" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Transceiver Parallel Data. Bank3 LB.
+NET "CAT_P1_D<1>"  LOC = "T2" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Transceiver Parallel Data. Bank3 LB.
+NET "CAT_P1_D<2>"  LOC = "U1" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Transceiver Parallel Data. Bank3 LB.
+NET "CAT_P1_D<3>"  LOC = "U3" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Transceiver Parallel Data. Bank3 LB.
+NET "CAT_P1_D<4>"  LOC = "V1" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Transceiver Parallel Data. Bank3 LB.
+NET "CAT_P1_D<5>"  LOC = "V2" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Transceiver Parallel Data. Bank3 LB.
+NET "CAT_P1_D<6>"  LOC = "W1" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Transceiver Parallel Data. Bank3 LB.
+NET "CAT_P1_D<7>"  LOC = "W3" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Transceiver Parallel Data. Bank3 LB.
+NET "CAT_P1_D<8>"  LOC = "Y1" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Transceiver Parallel Data. Bank3 LB.
+NET "CAT_P1_D<9>"  LOC = "Y2" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Transceiver Parallel Data. Bank3 LB.
+NET "CAT_P1_D<10>" LOC = "R1" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Transceiver Parallel Data. Bank3 LB.
+NET "CAT_P1_D<11>" LOC = "R3" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Transceiver Parallel Data. Bank3 LB.
+
+# Frame syncs
+NET "CAT_TX_FR_N" LOC = "K1" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Bank3 LB.
+NET "CAT_TX_FR_P" LOC = "K2" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Bank3 LB.
+#NET "CAT_RX_FR_N" LOC = "P1" | IOSTANDARD = LVCMOS18; # Bank3 LB.
+NET "CAT_RX_FR_P" LOC = "P2" | IOSTANDARD = LVCMOS18; # Bank3 LB.
+
+# Clocks ('N' clock lines are currently unused)
+#NET "CAT_DCLK_N" LOC = "P3" | IOSTANDARD = LVCMOS18; # Data Clock
+NET "CAT_DCLK_P"  LOC = "N4" | IOSTANDARD = LVCMOS18; # Data Clock
+NET "CAT_FBCLK_P" LOC = "J3" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Clock to AD9364. Bank3 LB.
+NET "CAT_FBCLK_N" LOC = "J1" | IOSTANDARD = LVCMOS18 | DRIVE = 2 | SLEW = SLOW; # Clock to AD9364. Bank3 LB.
+
+#### Peripherals ############################################################
+# Radio Switchery
+NET "cFE_SEL_TRX_TX" LOC = "A5" | IOSTANDARD = LVCMOS33 | DRIVE = 2 | SLEW = SLOW; # TRX Switch, high to enable TX path (Always on for Duplex) (high for now)
+NET "cFE_SEL_TRX_RX" LOC = "A6" | IOSTANDARD = LVCMOS33 | DRIVE = 2 | SLEW = SLOW; # TRX Switch, high to enable RX path (Always off for Duplex) (low for now)
+NET "cFE_SEL_RX_TRX" LOC = "B3" | IOSTANDARD = LVCMOS33 | DRIVE = 2 | SLEW = SLOW; # high to enable RX path to TRX switch (Always off for Duplex) (low for now)
+NET "cFE_SEL_RX_RX2" LOC = "C5" | IOSTANDARD = LVCMOS33 | DRIVE = 2 | SLEW = SLOW; # high to enable RX path to RX2 port (Always on for Duplex) (high for now)
+NET "cTXDRV_PWEN"    LOC = "A4" | IOSTANDARD = LVCMOS33 | DRIVE = 4 | SLEW = SLOW; # high to enable power to TX power amplifier (high for now)
+
+# LEDs  R: 5mA / G: 1.25mA / B: 2.5mA (the mcd is equalized with this number), set by resistor already, with LVTTL logic (3.3V)
+NET "cLED_TRX_G"     LOC = "A7" | IOSTANDARD = LVCMOS33 | DRIVE = 8 | SLEW = SLOW; # low to turn on TRX port LED green
+NET "cLED_TRX_B"     LOC = "B6" | IOSTANDARD = LVCMOS33 | DRIVE = 8 | SLEW = SLOW; # low to turn on TRX port LED blue
+NET "cLED_TRX_R"     LOC = "C6" | IOSTANDARD = LVCMOS33 | DRIVE = 8 | SLEW = SLOW; # low to turn on TRX port LED red
+NET "cLED_RX2_G"     LOC = "A9" | IOSTANDARD = LVCMOS33 | DRIVE = 8 | SLEW = SLOW; # low to turn on RX2 port LED green
+NET "cLED_RX2_B"     LOC = "B8" | IOSTANDARD = LVCMOS33 | DRIVE = 8 | SLEW = SLOW; # low to turn on RX2 port LED blue
+NET "cLED_RX2_R"     LOC = "A8" | IOSTANDARD = LVCMOS33 | DRIVE = 8 | SLEW = SLOW; # low to turn on RX2 port LED red
+NET "cLED_S0"        LOC = "B10" | IOSTANDARD = LVCMOS33 | DRIVE = 8 | SLEW = SLOW; # low to turn on S0 port LED red
+NET "cLED_S1"        LOC = "A10" | IOSTANDARD = LVCMOS33 | DRIVE = 8 | SLEW = SLOW; # low to turn on S1 port LED red
+
+
+# Clocking
+NET "CLK_40MHz_FPGA"    LOC = "AA10" | IOSTANDARD = LVCMOS18;   # 40MHz VCTCXO clock feed back
+NET "PPS_IN"            LOC = "B12" | IOSTANDARD = LVCMOS33;    # Pulse per second input (external)
+NET "CLKIN_10MHz"       LOC = "E6" | IOSTANDARD = LVCMOS18;     # 10MHz from external source
+NET "CLKIN_10MHz_REQ"   LOC = "E5" | IOSTANDARD = LVCMOS18;     # select 10MHz from external source
+NET "CLK_40M_DAC_nSYNC" LOC = "C17" | IOSTANDARD = LVCMOS33 | DRIVE = 2 | SLEW = SLOW; # 40MHz VCTCXO triming DAC serial frame/data latch (high for now)
+NET "CLK_40M_DAC_SCLK"  LOC = "D17" | IOSTANDARD = LVCMOS33 | DRIVE = 2 | SLEW = SLOW; # 40MHz VCTCXO triming DAC serial data clock (low for now)
+NET "CLK_40M_DAC_DIN"   LOC = "C16" | IOSTANDARD = LVCMOS33 | DRIVE = 2 | SLEW = SLOW; # 40MHz VCTCXO triming DAC serial data (low for now)
+
+## GPIO bus
+NET "fp_gpio<0>" LOC = "A18" | IOSTANDARD = LVCMOS33 | PULLUP;
+NET "fp_gpio<1>" LOC = "A17" | IOSTANDARD = LVCMOS33 | PULLUP;
+NET "fp_gpio<2>" LOC = "B16" | IOSTANDARD = LVCMOS33 | PULLUP;
+NET "fp_gpio<3>" LOC = "B18" | IOSTANDARD = LVCMOS33 | PULLUP;
+NET "fp_gpio<4>" LOC = "C15" | IOSTANDARD = LVCMOS33 | PULLUP;
+NET "fp_gpio<5>" LOC = "A15" | IOSTANDARD = LVCMOS33 | PULLUP;
+NET "fp_gpio<6>" LOC = "A16" | IOSTANDARD = LVCMOS33 | PULLUP;
+NET "fp_gpio<7>" LOC = "A13" | IOSTANDARD = LVCMOS33 | PULLUP;