Explore possible fix for Arduino-CI#187.

Author: James Foster

SampleProjects/TestSomething/test/defines.cpp

@@ -8,4 +8,15 @@ unittest(binary)
   assertEqual(100, B1100100);
 }
 
+#define DDRE      _SFR_IO8(0x02)
+
+ unittest(SFR_IO8)
+ {
+   // in normal arduino code, you can do this.  in arduino_ci, you might get an
+   // error like: cannot take the address of an rvalue of type 'int'
+   //
+   // this tests that directly
+   &DDRE;
+ }
+
 unittest_main()

cpp/arduino/Godmode.cpp

@@ -113,3 +113,5 @@ SPIClass SPI = SPIClass(&GODMODE()->spi.dataIn, &GODMODE()->spi.dataOut);
 
 // defined in Wire.h
 TwoWire Wire = TwoWire();
+
+volatile long long __ARDUINO_CI_SFR_MOCK[1024];

cpp/arduino/avr/io.h

@@ -96,7 +96,13 @@
 #ifndef _AVR_IO_H_
 #define _AVR_IO_H_
 
-#define _SFR_IO8(io_addr) (io_addr) // this macro is all we need from the sfr file
+// hardware mocks
+extern volatile long long __ARDUINO_CI_SFR_MOCK[1024];
+#define _SFR_IO8(io_addr) (*(volatile uint8_t *)(__ARDUINO_CI_SFR_MOCK + io_addr)) // this macro is all we need from the sfr file
+#define _SFR_IO16(io_addr) (*(volatile uint16_t *)(__ARDUINO_CI_SFR_MOCK + io_addr)) // this macro is all we need from the sfr file
+#define _SFR_MEM8(io_addr) (*(volatile uint8_t *)(__ARDUINO_CI_SFR_MOCK + io_addr)) // this macro is all we need from the sfr file
+#define _SFR_MEM16(io_addr) (*(volatile uint16_t *)(__ARDUINO_CI_SFR_MOCK + io_addr)) // this macro is all we need from the sfr file
+#define _SFR_MEM32(io_addr) (*(volatile uint32_t *)(__ARDUINO_CI_SFR_MOCK + io_addr)) // this macro is all we need from the sfr file
 
 #if defined (__AVR_AT94K__)
 #  include "ioat94k.h"