ADD SPI to EBAZ4205 for AD9834 (#331)

Co-authored-by: newell <newell.jensen@gmail.com>
Co-committed-by: newell <newell.jensen@gmail.com>

examples/ebaz4205/device_db.py

@@ -0,0 +1,70 @@
+core_addr = "192.168.1.57"
+
+device_db = {
+    "core": {
+        "type": "local",
+        "module": "artiq.coredevice.core",
+        "class": "Core",
+        "arguments": {
+            "host": core_addr,
+            "ref_period": 1e-9,
+            "target": "cortexa9",
+        },
+    },
+    "core_log": {
+        "type": "controller",
+        "host": "::1",
+        "port": 1068,
+        "command": "aqctl_corelog -p {port} --bind {bind} " + core_addr,
+    },
+    "core_moninj": {
+        "type": "controller",
+        "host": "::1",
+        "port_proxy": 1383,
+        "port": 1384,
+        "command": "aqctl_moninj_proxy --port-proxy {port_proxy} --port-control {port} --bind {bind} "
+        + core_addr,
+    },
+    "core_analyzer": {
+        "type": "controller",
+        "host": "::1",
+        "port_proxy": 1385,
+        "port": 1386,
+        "command": "aqctl_coreanalyzer_proxy --port-proxy {port_proxy} --port-control {port} --bind {bind} "
+        + core_addr,
+    },
+    "core_cache": {
+        "type": "local",
+        "module": "artiq.coredevice.cache",
+        "class": "CoreCache",
+    },
+    "core_dma": {"type": "local", "module": "artiq.coredevice.dma", "class": "CoreDMA"},
+    "led0": {
+        "type": "local",
+        "module": "artiq.coredevice.ttl",
+        "class": "TTLOut",
+        "arguments": {"channel": 0},
+    },
+    "led1": {
+        "type": "local",
+        "module": "artiq.coredevice.ttl",
+        "class": "TTLOut",
+        "arguments": {"channel": 1},
+    },
+}
+
+
+device_db.update(
+    spi0={
+        "type": "local",
+        "module": "artiq.coredevice.spi2",
+        "class": "SPIMaster",
+        "arguments": {"channel": 2},
+    },
+    dds0={
+        "type": "local",
+        "module": "artiq.coredevice.ad9834",
+        "class": "AD9834",
+        "arguments": {"spi_device": "spi0"},
+    },
+)

src/gateware/ebaz4205.py

@@ -1,23 +1,19 @@
 #!/usr/bin/env python
 
 import argparse
-from operator import itemgetter
 
+import analyzer
+import dma
+from artiq.gateware import rtio
+from artiq.gateware.rtio.phy import dds, spi2, ttl_simple
+from artiq.gateware.rtio.xilinx_clocking import fix_serdes_timing_path
+from config import write_csr_file, write_mem_file, write_rustc_cfg_file
 from migen import *
+from migen.build.generic_platform import IOStandard, Misc, Pins, Subsignal
 from migen.build.platforms import ebaz4205
-from migen.build.generic_platform import Pins, Subsignal, IOStandard, Misc
 from migen_axi.integration.soc_core import SoCCore
 from misoc.interconnect.csr import *
 
-from artiq.gateware import rtio
-from artiq.gateware.rtio.phy import ttl_simple
-from artiq.gateware.rtio.xilinx_clocking import fix_serdes_timing_path
-
-import dma
-import analyzer
-
-from config import write_csr_file, write_mem_file, write_rustc_cfg_file
-
 _ps = [
     (
         "ps",
@@ -83,6 +79,17 @@ _i2c = [
     )
 ]
 
+_spi = [
+    (
+        "spi",
+        0,
+        Subsignal("clk", Pins("V20")),
+        Subsignal("mosi", Pins("U20")),
+        Subsignal("cs_n", Pins("P19")),
+        IOStandard("LVCMOS33"),
+    )
+]
+
 
 class EBAZ4205(SoCCore):
     def __init__(self, rtio_clk=125e6, acpki=False):
@@ -97,6 +104,7 @@ class EBAZ4205(SoCCore):
         platform.add_extension(_ps)
         platform.add_extension(_ddr)
         platform.add_extension(_i2c)
+        platform.add_extension(_spi)
 
         gmii = platform.request("gmii")
         platform.add_period_constraint(gmii.rx_clk, 10)
@@ -171,6 +179,11 @@ class EBAZ4205(SoCCore):
             phy = ttl_simple.Output(user_led)
             self.submodules += phy
             self.rtio_channels.append(rtio.Channel.from_phy(phy))
+
+        print("SPI at RTIO channel 0x{:06x}".format(len(self.rtio_channels)))
+        spi_phy = spi2.SPIMaster(platform.request("spi"))
+        self.submodules += spi_phy
+        self.rtio_channels.append(rtio.Channel.from_phy(spi_phy, ififo_depth=4))
         self.config["RTIO_LOG_CHANNEL"] = len(self.rtio_channels)
         self.rtio_channels.append(rtio.LogChannel())