moved 3.3v signals to one place, removed duplicate

src/gateware/zc706.py

@@ -99,6 +99,25 @@ pmod1_33 = [
     ("pmod1_33", 7, Pins("AC19"), IOStandard("LVCMOS33")),
 ]
 
+_ams101_dac = [
+    ("ams101_dac", 0,
+        Subsignal("ldac", Pins("XADC:GPIO0")),
+        Subsignal("clk", Pins("XADC:GPIO1")),
+        Subsignal("mosi", Pins("XADC:GPIO2")),
+        Subsignal("cs_n", Pins("XADC:GPIO3")),
+        IOStandard("LVTTL")
+     )
+]
+
+_sdcard_spi_33 = [
+    ("sdcard_spi_33", 0,
+        Subsignal("miso", Pins("D20"), Misc("PULLUP=TRUE")),
+        Subsignal("clk", Pins("B20")),
+        Subsignal("mosi", Pins("J18")),
+        Subsignal("cs_n", Pins("H18")),
+        IOStandard("LVCMOS33")
+    )
+]
 
 def prepare_zc706_platform(platform):
     platform.toolchain.bitstream_commands.extend([
@@ -437,35 +456,7 @@ class _SatelliteBase(SoCCore):
         self.submodules.routing_table = rtio.RoutingTableAccess(self.cri_con)
         self.csr_devices.append("routing_table")
 
-# The NIST backplanes require setting VADJ to 3.3V by reprogramming the power supply.
-# This also changes the I/O standard for some on-board LEDs.
-leds_fmc33 = [
-    ("user_led_33", 0, Pins("Y21"), IOStandard("LVCMOS33")),
-    ("user_led_33", 1, Pins("G2"), IOStandard("LVCMOS15")),
-    ("user_led_33", 2, Pins("W21"), IOStandard("LVCMOS33")),
-    ("user_led_33", 3, Pins("A17"), IOStandard("LVCMOS15")),
-]
-
-# todo: verify if gpio pins/expansion port on xadc is the same as on kc705
-_ams101_dac = [
-    ("ams101_dac", 0,
-        Subsignal("ldac", Pins("XADC:GPIO0")),
-        Subsignal("clk", Pins("XADC:GPIO1")),
-        Subsignal("mosi", Pins("XADC:GPIO2")),
-        Subsignal("cs_n", Pins("XADC:GPIO3")),
-        IOStandard("LVTTL")
-     )
-]
 
-_sdcard_spi_33 = [
-    ("sdcard_spi_33", 0,
-        Subsignal("miso", Pins("D20"), Misc("PULLUP=TRUE")),
-        Subsignal("clk", Pins("B20")),
-        Subsignal("mosi", Pins("J18")),
-        Subsignal("cs_n", Pins("H18")),
-        IOStandard("LVCMOS33")
-    )
-]
 
 class _NIST_CLOCK_RTIO:
     """
@@ -501,7 +492,6 @@ class _NIST_CLOCK_RTIO:
         self.submodules += phy
         rtio_channels.append(rtio.Channel.from_phy(phy, ififo_depth=512))
 
-        # could check the LED #
         phy = ttl_simple.Output(platform.request("user_led_33", 2))
         self.submodules += phy
         rtio_channels.append(rtio.Channel.from_phy(phy))