kmtronic: get status using read all

8 port kmtronic board does not support
reading from one port.
reading all ports at ones is supporter on both
4 and 8 port boards.

Author: benjamin1313

doc/configuration.rst

@@ -597,11 +597,13 @@ A :any:`KMTronicRelay` resource describes a single output of an USB Relay Contro
 
    KMTronicRelay:
      index: 2
+     ports: 4
      match:
        ID_SERIAL_SHORT: 'AB0LBF2U'
 
 Arguments:
-  - index (int): number of the relay to use.
+  - index (int): number on the relay to use.
+  - ports: (int): number of ports on the relay. defaults to 8
   - match (dict): key and value pairs for a udev match, see `udev Matching`_
 
 NetworkKMTronicRelay

labgrid/driver/kmtronicrelay.py

@@ -40,5 +40,5 @@ def set(self, status):
     @Driver.check_active
     @step(result=True)
     def get(self):
-        status = self.proxy.get(self.relay.path, self.relay.index)
+        status = self.proxy.get(self.relay.path, self.relay.index, self.relay.ports)
         return status

labgrid/remote/exporter.py

@@ -534,6 +534,7 @@ def _get_params(self):
             "vendor_id": self.local.vendor_id,
             "model_id": self.local.model_id,
             "index": self.local.index,
+            "ports": self.local.ports,
         }
 
 @attr.s(eq=False)

labgrid/resource/remote.py

@@ -329,6 +329,7 @@ def __attrs_post_init__(self):
 class NetworkKMTronicRelay(RemoteUSBResource):
     """The NetworkKMTronicRelay describes a remotely accessible USB relay port"""
     index = attr.ib(default=1, validator=attr.validators.instance_of(int))
+    ports = attr.ib(default=8, validator=attr.validators.instance_of(int))
     def __attrs_post_init__(self):
         self.timeout = 10.0
         super().__attrs_post_init__()

labgrid/resource/udev.py

@@ -710,6 +710,7 @@ def filter_match(self, device):
 @attr.s(eq=False)
 class KMTronicRelay(USBResource):
     index = attr.ib(default=1, validator=attr.validators.instance_of(int))
+    ports = attr.ib(default=8, validator=attr.validators.instance_of(int))
 
     def __attrs_post_init__(self):
         self.match['SUBSYSTEM'] = 'tty'

labgrid/util/agents/kmtronic_relay.py

@@ -9,13 +9,14 @@ def set_output(self, path, index, status):
         with serial.Serial(path, 9600) as ser:
             ser.write(cmd)
 
-    def get_output(self, path, index):
+    def get_output(self, path, index, ports):
         # \xFF\x01\x03 will read relay 1 status
-        cmd = bytes([255, index, 3])
+        # \xFF\x09\x00 will read from all relays
+        cmd = bytes([255, 9, 0])
         with serial.Serial(path, 9600) as ser:
             ser.write(cmd)
-            data = ser.read(3)
-        return data[2]
+            data = ser.read(ports)
+        return data[index-1]
 
 _relays = {}
 
@@ -28,9 +29,9 @@ def handle_set(path, index, status):
     relay = _get_relay(path)
     relay.set_output(path, index, status)
 
-def handle_get(path, index):
+def handle_get(path, index, ports):
     relay = _get_relay(path)
-    return relay.get_output(path, index)
+    return relay.get_output(path, index, ports)
 
 methods = {
     "set": handle_set,

tests/test_kmtronicrelay.py

@@ -13,7 +13,7 @@ def test_kmtronicrelay_driver(target):
 
 
 def test_kmtronicrelay_control(target):
-    r = KMTronicRelay(target, name=None, match={"ID_SERIAL_SHORT": "AB0LBF2U"})
+    r = KMTronicRelay(target, name=None, match={"ID_SERIAL_SHORT": "AB0LBF2U"}, index=2, ports=4)
     d = KMTronicRelayDriver(target, name=None)
     target.activate(d)
     d.set(1)