kc705: add TTLs and shift register driver for FMC DIO

artiq/examples/master/device_db.py

@@ -34,7 +34,7 @@ device_db = {
         "class": "DDSGroupAD9914",
         "arguments": {
             "sysclk": 3e9,
-            "first_dds_bus_channel": 29,
+            "first_dds_bus_channel": 32,
             "dds_bus_count": 2,
             "dds_channel_count": 3
         }
@@ -131,6 +131,34 @@ device_db = {
         "arguments": {"channel": 26}
     },
 
+    # FMC DIO used to connect to Zotino
+    "fmcdio_dirctl_clk": {
+        "type": "local",
+        "module": "artiq.coredevice.ttl",
+        "class": "TTLOut",
+        "arguments": {"channel": 27}
+    },
+    "fmcdio_dirctl_ser": {
+        "type": "local",
+        "module": "artiq.coredevice.ttl",
+        "class": "TTLOut",
+        "arguments": {"channel": 28}
+    },
+    "fmcdio_dirctl_latch": {
+        "type": "local",
+        "module": "artiq.coredevice.ttl",
+        "class": "TTLOut",
+        "arguments": {"channel": 29}
+    },
+    "fmcdio_dirctl": {
+        "type": "local",
+        "module": "artiq.coredevice.shiftreg",
+        "class": "ShiftReg",
+        "arguments": {"clk": "fmcdio_dirctl_clk",
+                      "ser": "fmcdio_dirctl_ser",
+                      "latch": "fmcdio_dirctl_latch"}
+    },
+
     # DAC
     "spi_ams101": {
         "type": "local",
@@ -148,13 +176,13 @@ device_db = {
         "type": "local",
         "module": "artiq.coredevice.spi",
         "class": "SPIMaster",
-        "arguments": {"channel": 27}
+        "arguments": {"channel": 30}
     },
     "ttl_zotino_ldac": {
         "type": "local",
         "module": "artiq.coredevice.ttl",
         "class": "TTLOut",
-        "arguments": {"channel": 28}
+        "arguments": {"channel": 31}
     },
     "dac_zotino": {
         "type": "local",
@@ -168,20 +196,20 @@ device_db = {
         "type": "local",
         "module": "artiq.coredevice.dds",
         "class": "DDSChannelAD9914",
-        "arguments": {"bus_channel": 29, "channel": 0},
+        "arguments": {"bus_channel": 32, "channel": 0},
         "comment": "Comments work in DDS panel as well"
     },
     "dds1": {
         "type": "local",
         "module": "artiq.coredevice.dds",
         "class": "DDSChannelAD9914",
-        "arguments": {"bus_channel": 29, "channel": 1}
+        "arguments": {"bus_channel": 32, "channel": 1}
     },
     "dds2": {
         "type": "local",
         "module": "artiq.coredevice.dds",
         "class": "DDSChannelAD9914",
-        "arguments": {"bus_channel": 29, "channel": 2}
+        "arguments": {"bus_channel": 32, "channel": 2}
     },
 
     # Controllers

artiq/gateware/targets/kc705_dds.py

@@ -108,6 +108,12 @@ _sdcard_spi_33 = [
 ]
 
 _zotino = [
+    ("fmcdio_dirctl", 0,
+        Subsignal("clk", Pins("HPC:LA32_N")),
+        Subsignal("ser", Pins("HPC:LA33_P")),
+        Subsignal("latch", Pins("HPC:LA32_P")),
+        IOStandard("LVCMOS33")
+    ),
     ("zotino_spi_p", 0,
         Subsignal("clk", Pins("HPC:LA08_P")),
         Subsignal("mosi", Pins("HPC:LA09_P")),
@@ -254,13 +260,19 @@ class NIST_CLOCK(_NIST_Ions):
             rtio_channels.append(rtio.Channel.from_phy(
                 phy, ofifo_depth=128, ififo_depth=128))
             
-        phy = spi.SPIMaster(platform.request("sdcard_spi_33", 0))
+        phy = spi.SPIMaster(platform.request("sdcard_spi_33"))
         self.submodules += phy
         rtio_channels.append(rtio.Channel.from_phy(
             phy, ofifo_depth=4, ififo_depth=4))
 
-        sdac_phy = spi.SPIMaster(self.platform.request("zotino_spi_p", 0),
+        fmcdio_dirctl = self.platform.request("fmcdio_dirctl")
-                                 self.platform.request("zotino_spi_n", 0))
+        for s in fmcdio_dirctl.clk, fmcdio_dirctl.ser, fmcdio_dirctl.latch:
+            phy = ttl_simple.Output(s)
+            self.submodules += phy
+            rtio_channels.append(rtio.Channel.from_phy(phy))
+
+        sdac_phy = spi.SPIMaster(self.platform.request("zotino_spi_p"),
+                                 self.platform.request("zotino_spi_n"))
         self.submodules += sdac_phy
         rtio_channels.append(rtio.Channel.from_phy(sdac_phy, ififo_depth=4))
 

doc/manual/core_device.rst

@@ -68,7 +68,13 @@ With the CLOCK hardware, the TTL lines are mapped as follows:
 +--------------------+-----------------------+--------------+
 | 21                 | LA32_P                | Clock        |
 +--------------------+-----------------------+--------------+
-| 28                 | ZOTINO_LDAC           | Output       |
+| 27                 | FMCDIO_DIRCTL_CLK     | Output       |
++--------------------+-----------------------+--------------+
+| 28                 | FMCDIO_DIRCTL_SER     | Output       |
++--------------------+-----------------------+--------------+
+| 29                 | FMCDIO_DIRCTL_LATCH   | Output       |
++--------------------+-----------------------+--------------+
+| 31                 | ZOTINO_LDAC           | Output       |
 +--------------------+-----------------------+--------------+
 
 The board has RTIO SPI buses mapped as follows:
@@ -86,11 +92,14 @@ The board has RTIO SPI buses mapped as follows:
 +--------------+--------------+--------------+--------------+------------+
 | 26           | MMC_SPI_CS_N | MMC_SPI_MOSI | MMC_SPI_MISO | MMC_SPI_CLK|
 +--------------+--------------+--------------+--------------+------------+
-| 27           | ZOTINO_CS_N  | ZOTINO_MOSI  | ZOTINO_MISO  | ZOTINO_CLK |
+| 30           | ZOTINO_CS_N  | ZOTINO_MOSI  | ZOTINO_MISO  | ZOTINO_CLK |
 +--------------+--------------+--------------+--------------+------------+
 
-The DDS bus is on channel 29.
+The DDS bus is on channel 32.
 
+This configuration supports a Zotino connected to the KC705 FMC HPC through a FMC DIO 32ch LVDS v1.2 and a VHDCI breakout board rev 1.0.
+
+The shift registers on the FMC card should be configured to set the directions of its LVDS buffers, using :mod:`artiq.coredevice.shiftreg`.
 
 NIST QC2
 ++++++++