separate ADC definition into separate files and add a test

SampleProjects/TestSomething/test/adc.cpp

@@ -0,0 +1,10 @@
+#include <ArduinoUnitTests.h>
+#include <Arduino.h>
+
+unittest(check_ADCSRA_read_write) {
+ ADCSRA = 123;
+
+ assertEqual(123, ADCSRA);
+}
+
+unittest_main()

SampleProjects/TestSomething/test/isr_declaration.cpp

@@ -1,6 +1,7 @@
 #include <ArduinoUnitTests.h>
 #include <Arduino.h>
 
+// just check if declaration compiles
 ISR (WDT_vect) {
 }
 

cpp/arduino/Arduino.h

@@ -24,6 +24,7 @@ typedef uint8_t byte;
 // Math and Trig
 #include "AvrMath.h"
 
+#include "AvrAdc.h"
 #include <avr/interrupt.h>
 
 #include "Godmode.h"

cpp/arduino/AvrAdc.cpp

@@ -0,0 +1,4 @@
+#include "AvrAdc.h"
+
+// mock storage to allow access to ADCSRA
+unsigned char sfr_store;

cpp/arduino/AvrAdc.h

@@ -0,0 +1,8 @@
+#ifndef _AVR_ADC_H_
+#define _AVR_ADC_H_
+
+// mock storage to allow access to ADCSRA
+extern unsigned char sfr_store;
+#define _SFR_MEM8(mem_addr) sfr_store
+
+#endif // _AVR_ADC_H_

cpp/arduino/avr/sleep.h

@@ -37,8 +37,4 @@ void sleep_mode() {
  sleep_disable();
 }
 
-// mock storage to allow access to ADCSRA
-unsigned char sfr_store;
-#define _SFR_MEM8(mem_addr) sfr_store
-
 #endif /* _AVR_SLEEP_H_ */