Implement __ARDUNO_CI_SFR_MOCK (squashed)

Author: James Foster

SampleProjects/TestSomething/test/defines.cpp

@@ -16,7 +16,7 @@ unittest(SFR_IO8)
   // error like: cannot take the address of an rvalue of type 'int'
   //
   // this tests that directly
-  &DDRE;
+  auto foo = &DDRE;  // avoid compiler warning by using the result of an expression
 }
 
 unittest_main()

cpp/arduino/Godmode.cpp

@@ -118,3 +118,5 @@ TwoWire Wire = TwoWire();
   #include <EEPROM.h>
   EEPROMClass EEPROM;
 #endif
+
+volatile long long __ARDUINO_CI_SFR_MOCK[1024];

cpp/arduino/SPI.h

@@ -40,7 +40,11 @@
 
 class SPISettings {
 public:
-  SPISettings(uint32_t clock, uint8_t bitOrder, uint8_t dataMode){};
+  uint8_t bitOrder;
+
+  SPISettings(uint32_t clock, uint8_t bitOrder = MSBFIRST, uint8_t dataMode = SPI_MODE0) {
+    this->bitOrder = bitOrder;
+  };
   SPISettings(){};
 };
 
@@ -68,6 +72,7 @@ class SPIClass: public ObservableDataStream {
   // and configure the correct settings.
   void beginTransaction(SPISettings settings)
   {
+    this->bitOrder = settings.bitOrder;
     #ifdef SPI_TRANSACTION_MISMATCH_LED
     if (inTransactionFlag) {
       pinMode(SPI_TRANSACTION_MISMATCH_LED, OUTPUT);
@@ -95,7 +100,7 @@ class SPIClass: public ObservableDataStream {
     union { uint16_t val; struct { uint8_t lsb; uint8_t msb; }; } in, out;
     in.val = data;
     #if defined(SPCR) && defined(DORD)
-    if (!(SPCR & (1 << DORD))) {
+    if (bitOrder == MSBFIRST) {
       out.msb = transfer(in.msb);
       out.lsb =  transfer(in.lsb);
     }
@@ -147,6 +152,7 @@ class SPIClass: public ObservableDataStream {
   #endif
 
   bool isStarted = false;
+  uint8_t bitOrder;
   String* dataIn;
   String* dataOut;
 };

cpp/arduino/avr/io.h

@@ -96,7 +96,15 @@
 #ifndef _AVR_IO_H_
 #define _AVR_IO_H_
 
-#define _SFR_IO8(io_addr) (*(volatile uint8_t *)(io_addr)) // this macro is all we need from the sfr file
+// hardware mocks
+
+// this set of macros is all we need from the sfr file
+extern volatile long long __ARDUINO_CI_SFR_MOCK[1024];
+#define _SFR_IO8(io_addr) (*(volatile uint8_t *)(__ARDUINO_CI_SFR_MOCK + io_addr))
+#define _SFR_IO16(io_addr) (*(volatile uint16_t *)(__ARDUINO_CI_SFR_MOCK + io_addr))
+#define _SFR_MEM8(io_addr) (*(volatile uint8_t *)(__ARDUINO_CI_SFR_MOCK + io_addr))
+#define _SFR_MEM16(io_addr) (*(volatile uint16_t *)(__ARDUINO_CI_SFR_MOCK + io_addr))
+#define _SFR_MEM32(io_addr) (*(volatile uint32_t *)(__ARDUINO_CI_SFR_MOCK + io_addr))
 
 #if defined (__AVR_AT94K__)
 #  include "ioat94k.h"