pre-operational is good enough to read terminals

ebpfcat/ethercat.py

@@ -531,7 +531,7 @@ class Terminal:
         ret, = await self.ec.roundtrip(ECCmd.FPRD, self.position, 0x0130, "H")
         return ret
 
-    async def to_operational(self):
+    async def to_operational(self, target=8):
         """try to bring the terminal to operational state
 
         this tries to push the terminal through its state machine to the
@@ -556,6 +556,8 @@ class Terminal:
                                                    0x0130, "H2xH")
                 if error != 0:
                     raise EtherCatError(f"AL register {error}")
+            if state == target:
+                return
 
     async def get_error(self):
         """read the error register"""

ebpfcat/scripts.py

@@ -69,7 +69,7 @@ async def info():
                 i += infos[i] + 1
 
         if args.sdo:
-            await t.to_operational()
+            await t.to_operational(4)
             ret = await t.read_ODlist()
             for k, v in ret.items():
                 print(f"{k:X}:")
@@ -86,7 +86,7 @@ async def info():
                             else:
                                 print(f"        {r}")
         if args.pdo:
-            await t.to_operational()
+            await t.to_operational(4)
             await t.parse_pdos()
             for (idx, subidx), (sm, pos, fmt) in t.pdos.items():
                 print(f"{idx:4X}:{subidx:02X} {sm} {pos} {fmt}")
@@ -159,7 +159,7 @@ async def create_test():
         await t.initialize(-i, await ec.find_free_address())
         sdo = {}
         if t.has_mailbox():
-            await t.to_operational()
+            await t.to_operational(4)
             odlist = await t.read_ODlist()
 
             for k, v in odlist.items():