fix: Fettling - attempting to mock the avr headers

Author: milesburton

.arduino-ci.cpp

@@ -0,0 +1,14 @@
+#define ARDUINO_CI 1
+
+// Mock implementation of CRC16 for testing
+extern "C" uint16_t _crc16_update(uint16_t crc, uint8_t data) {
+    uint8_t i;
+    crc ^= data;
+    for (i = 0; i < 8; ++i) {
+        if (crc & 1)
+            crc = (crc >> 1) ^ 0xA001;
+        else
+            crc = (crc >> 1);
+    }
+    return crc;
+}

.arduino-ci.yml

@@ -7,6 +7,8 @@ compile:
 
 unittest:
   platforms:
-    - uno  
+    - uno
   libraries:
-    - "OneWire"
+    - "OneWire"
+  mocks:
+    - crc16.h