[QUBO] Solution readout via spikeIO for multi-chip support (lava-nc#820)

* 32bit receiver

* linting

---------

Co-authored-by: Risbud, Sumedh <[email protected]>

src/lava/proc/receiver/process.py

@@ -1,4 +1,4 @@
-# Copyright (C) 2022 Intel Corporation
+# Copyright (C) 2022-2023 Intel Corporation
 # SPDX-License-Identifier: BSD-3-Clause
 # See: https://spdx.org/licenses/
 
@@ -30,3 +30,30 @@ def __init__(self, *,
         super().__init__(shape=shape, name=name, log_config=log_config)
         self.a_in = InPort(shape=shape)
         self.payload = Var(shape=shape, init=0)
+
+
+class Receiver32Bit(AbstractProcess):
+    """Process saving input messages as a payload variable. For up to 32bit
+    payload.
+
+    Parameters
+    ----------
+    shape : tuple(int)
+        Shape of the population of process units.
+    name : str
+        Name of the Process. Default is 'Process_ID', where ID is an
+        integer value that is determined automatically.
+    log_config : LogConfig
+        Configuration options for logging.
+    """
+
+    def __init__(self, *,
+                 shape: ty.Tuple[int, ...] = (1,),
+                 name: ty.Optional[str] = None,
+                 log_config: ty.Optional[LogConfig] = None) -> None:
+        super().__init__(shape=shape, name=name, log_config=log_config)
+        self.a_in = InPort(shape=shape)
+
+        # Total payload = (payload_first_byte << 24) + payload_last_bytes
+        self.payload_last_bytes = Var(shape=shape, init=0)
+        self.payload_first_byte = Var(shape=shape, init=0)