software: add rising/falling edge support

example_designs/test/test_analyzer.py

@@ -13,7 +13,7 @@ dumps = {
 
 for group, filename in dumps.items():
     analyzer = LiteScopeAnalyzerDriver(wb.regs, "analyzer", debug=True)
-    analyzer.configure_trigger(cond={"zero": 1})
+    analyzer.add_rising_edge_trigger("zero")
     analyzer.configure_subsampler(1)
     analyzer.configure_group(group)
     analyzer.run(offset=32, length=128)

litescope/software/driver/analyzer.py

@@ -65,8 +65,9 @@ class LiteScopeAnalyzerDriver:
         self.group = value
         self.mux_value.write(value)
 
-    def configure_trigger(self, value=0, mask=0, cond=None):
-        self.frontend_trigger_enable.write(0)
+    def add_trigger(self, value=0, mask=0, cond=None):
+        if self.frontend_trigger_mem_full.read():
+            raise ValueError("Trigger memory full, too much conditions")
         if cond is not None:
             for k, v in cond.items():
                 value |= getattr(self, k + "_o")*v
@@ -75,6 +76,17 @@ class LiteScopeAnalyzerDriver:
         self.frontend_trigger_mem_value.write(value)
         self.frontend_trigger_mem_write.write(1)
 
+    def add_rising_edge_trigger(self, name):
+        self.add_trigger(getattr(self, name + "_o")*0, getattr(self, name + "_m"))
+        self.add_trigger(getattr(self, name + "_o")*1, getattr(self, name + "_m"))
+
+    def add_falling_edge_trigger(self, name):
+        self.add_trigger(getattr(self, name + "_o")*1, getattr(self, name + "_m"))
+        self.add_trigger(getattr(self, name + "_o")*0, getattr(self, name + "_m"))
+
+    def configure_trigger(self, value=0, mask=0, cond=None):
+        self.add_trigger(value, mask, cond)
+
     def configure_subsampler(self, value):
         self.frontend_subsampler_value.write(value-1)