drtio: add remote converter SPI example (#740)

artiq/examples/drtio/device_db.py

@@ -146,4 +146,28 @@ device_db = {
         "class": "TTLInOut",
         "arguments": {"channel": 0x010009}
     },
+
+    "converter_spi": {
+        "type": "local",
+        "module": "artiq.coredevice.spi",
+        "class": "NRTSPIMaster",
+    },
+    "ad9154_spi": {
+        "type": "local",
+        "module": "artiq.coredevice.ad9154_spi",
+        "class": "AD9154",
+        "arguments": {"spi_device": "converter_spi", "chip_select": 1}
+    },
+    "rconverter_spi": {
+        "type": "local",
+        "module": "artiq.coredevice.spi",
+        "class": "NRTSPIMaster",
+        "arguments": {"busno": 0x010000}
+    },
+    "rad9154_spi": {
+        "type": "local",
+        "module": "artiq.coredevice.ad9154_spi",
+        "class": "AD9154",
+        "arguments": {"spi_device": "rconverter_spi", "chip_select": 1}
+    },
 }

artiq/examples/drtio/repository/ad9154_spi.py

@@ -0,0 +1,24 @@
+from artiq.coredevice.ad9154_reg import *
+from artiq.experiment import *
+
+
+class Test(EnvExperiment):
+    def build(self):
+        self.setattr_device("core")
+        self.setattr_device("ad9154_spi")
+        self.setattr_device("rad9154_spi")
+
+    @kernel
+    def run(self):
+        self.ad9154_spi.setup_bus()
+        self.rad9154_spi.setup_bus()
+
+        for i in range(5):
+            self.p("local PRODID: 0x%04x", (self.ad9154_spi.read(AD9154_PRODIDH) << 8) |
+                self.ad9154_spi.read(AD9154_PRODIDL))
+            self.p("remote PRODID: 0x%04x", (self.rad9154_spi.read(AD9154_PRODIDH) << 8) |
+                self.rad9154_spi.read(AD9154_PRODIDL))
+
+    def p(self, f, *a):
+        print(f % a)
+