initial commit, simple RTIO gateware

zc706.py

@@ -0,0 +1,73 @@
+#!/usr/bin/env python
+
+import argparse
+
+from migen import *
+
+from migen_axi.integration.soc_core import SoCCore
+from migen_axi.platforms import zc706
+from misoc.integration import cpu_interface
+
+from artiq.gateware import rtio
+from artiq.gateware.rtio.phy import ttl_simple
+
+
+class ZC706(SoCCore):
+    def __init__(self):
+        platform = zc706.Platform()
+        SoCCore.__init__(self, platform=platform)
+
+        platform.add_platform_command("create_clock -name clk_fpga_0 -period 8 [get_pins \"PS7/FCLKCLK[0]\"]")
+        platform.add_platform_command("set_input_jitter clk_fpga_0 0.24")
+        self.clock_domains.cd_rtio = ClockDomain()
+        self.comb += [
+            self.cd_rtio.clk.eq(self.ps7.cd_sys.clk),
+            self.cd_rtio.rst.eq(self.ps7.cd_sys.rst)
+        ]
+
+        rtio_channels = []
+        for i in range(4):
+            pad = platform.request("user_led", i)
+            phy = ttl_simple.InOut(pad)
+            self.submodules += phy
+            rtio_channels.append(rtio.Channel.from_phy(phy))
+        self.add_rtio(rtio_channels)
+
+    def add_rtio(self, rtio_channels):
+        self.submodules.rtio_tsc = rtio.TSC("async", glbl_fine_ts_width=3)
+        self.submodules.rtio_core = rtio.Core(self.rtio_tsc, rtio_channels)
+        self.csr_devices.append("rtio_core")
+        self.submodules.rtio = rtio.KernelInitiator(self.rtio_tsc)
+        self.csr_devices.append("rtio")
+
+        self.comb += self.rtio.cri.connect(self.rtio_core.cri)
+
+
+def write_csr_file(soc, filename):
+    with open(filename, "w") as f:
+        f.write(cpu_interface.get_csr_rust(
+            soc.get_csr_regions(), soc.get_csr_groups(), soc.get_constants()))
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="ARTIQ port to the ZC706 Zynq development kit")
+    parser.add_argument("action", metavar="ACTION", nargs="*",
+                        default="gateware rustif".split(),
+                        help="actions to perform, default: %(default)s")
+    args = parser.parse_args()
+
+    soc = ZC706()
+    soc.finalize()
+
+    for action in args.action:
+        if action == "gateware":
+            soc.build()
+        elif action == "rustif":
+            write_csr_file(soc, "pl.rs")
+        else:
+            raise ValueError("invalid action", action)
+
+
+if __name__ == "__main__":
+    main()