implement memory flush in hardware instead of software

litescope/core.py

@@ -119,6 +119,7 @@ class AnalyzerStorage(Module, AutoCSR):
         self.wait = CSRStatus()
         self.run  = CSRStatus()
 
+        self.mem_flush = CSR()
         self.mem_valid = CSRStatus()
         self.mem_ready = CSR()
         self.mem_data = CSRStatus(dw)
@@ -126,7 +127,8 @@ class AnalyzerStorage(Module, AutoCSR):
         # # #
 
         mem = stream.SyncFIFO([("data", dw)], depth//cd_ratio, buffered=True)
-        self.submodules += mem
+        self.submodules += ResetInserter()(mem)
+        self.comb += mem.reset.eq(self.mem_flush.re)
 
         fsm = FSM(reset_state="IDLE")
         self.submodules += fsm

litescope/software/driver/analyzer.py

@@ -74,8 +74,7 @@ class LiteScopeAnalyzerDriver:
         self.frontend_subsampler_value.write(value-1)
 
     def run(self, offset, length):
-        while self.storage_mem_valid.read():
-            self.storage_mem_ready.write(1)
+        self.storage_mem_flush.write(1)
         if self.debug:
             print("[running]...")
         self.storage_offset.write(offset)