fix: Fettling - attempting to mock the avr headers

Author: milesburton

.arduino-ci.cpp

@@ -1,7 +1,12 @@
 #define ARDUINO_CI 1
 
-// Mock implementation of CRC16 for testing
-extern "C" uint16_t _crc16_update(uint16_t crc, uint8_t data) {
+// Mock OneWire GPIO functions
+uint8_t digitalPinToBitMask(uint8_t pin) { return 1 << (pin % 8); }
+void* digitalPinToPort(uint8_t pin) { static uint8_t dummy; return &dummy; }
+void* portModeRegister(void* port) { return port; }
+
+// Mock CRC16 implementation
+uint16_t _crc16_update(uint16_t crc, uint8_t data) {
     uint8_t i;
     crc ^= data;
     for (i = 0; i < 8; ++i) {
@@ -11,4 +16,4 @@ extern "C" uint16_t _crc16_update(uint16_t crc, uint8_t data) {
             crc = (crc >> 1);
     }
     return crc;
-}
+}

.arduino-ci.yml

@@ -11,4 +11,6 @@ unittest:
   libraries:
     - "OneWire"
   mocks:
-    - crc16.h
+    - crc16.h
+    - OneWire_direct_gpio.h
+    - pins_arduino.h