init

venv/lib/python3.11/site-packages/chafon_rfid/uhfreader288m.py

@@ -0,0 +1,77 @@
+#!/usr/bin/env python
+
+from .base import G2InventoryResponse as BaseG2InventoryResponse, ReaderCommand, ReaderResponseFrame, Tag, TagData
+from .command import G2_TAG_INVENTORY
+
+G2_TAG_INVENTORY_PARAM_MEMORY_EPC = 0x01
+G2_TAG_INVENTORY_PARAM_MEMORY_TID = 0x02
+G2_TAG_INVENTORY_PARAM_MEMORY_USER = 0x03
+
+G2_TAG_INVENTORY_PARAM_SESSION_S0 = 0x00
+G2_TAG_INVENTORY_PARAM_SESSION_S1 = 0x01
+G2_TAG_INVENTORY_PARAM_SESSION_S2 = 0x02
+G2_TAG_INVENTORY_PARAM_SESSION_S3 = 0x03
+G2_TAG_INVENTORY_PARAM_SESSION_SMART = 0xFF
+
+G2_TAG_INVENTORY_PARAM_ANTENNA_1 = 0x80
+G2_TAG_INVENTORY_PARAM_ANTENNA_2 = 0x81
+G2_TAG_INVENTORY_PARAM_ANTENNA_3 = 0x82
+G2_TAG_INVENTORY_PARAM_ANTENNA_4 = 0x83
+
+G2_TAG_INVENTORY_PARAM_TARGET_A = 0x00
+G2_TAG_INVENTORY_PARAM_TARGET_B = 0x01
+
+
+class G2InventoryCommand(ReaderCommand):
+
+    def __init__(self, addr=0xFF, q_value=15, deliver_statistics=0, strategy=0, fast_id=0,
+                 session=G2_TAG_INVENTORY_PARAM_SESSION_S0, mask_source=G2_TAG_INVENTORY_PARAM_MEMORY_EPC,
+                 target=G2_TAG_INVENTORY_PARAM_TARGET_A, antenna=G2_TAG_INVENTORY_PARAM_ANTENNA_1, scan_time=0x14):
+        # TODO check q_value in range 0 ~ 15, session 0 ~ 3
+        mask_data = [0x00, 0x00, 0x00]
+        q_value_byte = (deliver_statistics << 7) + (strategy << 6) + (fast_id << 5) + q_value
+        cmd_data = [q_value_byte, session, mask_source] + mask_data + [target, antenna, scan_time]
+        super(G2InventoryCommand, self).__init__(G2_TAG_INVENTORY, addr, data=cmd_data)
+
+
+def _translate_antenna_num(antenna_code):
+    if antenna_code == 1:
+        return 1
+    elif antenna_code == 2:
+        return 2
+    elif antenna_code == 4:
+        return 3
+    elif antenna_code == 8:
+        return 4
+    else:
+        return None
+
+
+class G2InventoryResponseFrame(ReaderResponseFrame):
+
+    tag_prefix_bytes = 0
+    tag_suffix_bytes = 1
+
+    tag_data_prefix_bytes = 1 # Number of bytes before 'num tags' byte
+
+    def __init__(self, resp_bytes, offset=0):
+        super(G2InventoryResponseFrame, self).__init__(resp_bytes, offset)
+        self.num_tags = 0
+        self.antenna = 0
+        if len(self.data) > self.tag_data_prefix_bytes:
+            self.antenna = _translate_antenna_num(self.data[0])
+            self.num_tags = self.data[1]
+
+    def get_tag(self):
+        tag_data_prefix_and_num_tags_bytes = self.tag_data_prefix_bytes + 1
+        if len(self.data) > tag_data_prefix_and_num_tags_bytes:
+            tag_data = TagData(self.data[self.tag_data_prefix_bytes:], prefix_bytes=self.tag_prefix_bytes, suffix_bytes=self.tag_suffix_bytes)
+            for data_item in tag_data.get_tag_data():
+                epc_value = data_item[1]
+                rssi = data_item[2][0]
+                yield Tag(epc_value, antenna_num=self.antenna, rssi=rssi)
+
+
+class G2InventoryResponse(BaseG2InventoryResponse):
+
+    frame_class = G2InventoryResponseFrame