software/dump: add JSON dump

litescope/software/driver/analyzer.py

@@ -168,6 +168,8 @@ class LiteScopeAnalyzerDriver:
             dump = CSVDump()
         elif ext == ".py":
             dump = PythonDump()
+        elif ext == ".json":
+            dump = JSONDump()
         elif ext == ".sr":
             dump = SigrokDump(samplerate=samplerate)
         else:

litescope/software/dump/__init__.py

@@ -1,5 +1,6 @@
 from litescope.software.dump.common import DumpData, DumpVariable, Dump
 from litescope.software.dump.csv import CSVDump
 from litescope.software.dump.python import PythonDump
+from litescope.software.dump.json import JSONDump
 from litescope.software.dump.sigrok import SigrokDump
 from litescope.software.dump.vcd import VCDDump

litescope/software/dump/json.py

@@ -0,0 +1,25 @@
+#
+# This file is part of LiteScope.
+#
+# Copyright (c) 2021 Arnaud Durand <arnaud.durand@unifr.ch>
+# SPDX-License-Identifier: BSD-2-Clause
+
+import json
+
+from litescope.software.dump.common import Dump
+
+
+class JSONDump(Dump):
+    def __init__(self, dump=None):
+        Dump.__init__(self)
+        self.variables = [] if dump is None else dump.variables
+
+    def generate_data(self):
+        return {v.name: v.values for v in self.variables}
+
+    def write(self, filename):
+        with open(filename, "w") as f:
+            json.dump(self.generate_data(), f)
+
+    def read(self, filename):
+        raise NotImplementedError("Python files can not (yet) be read, please contribute!")