stub enough for tests to build?

firmware/Makefile

@@ -14,6 +14,8 @@ ifeq ($(USE_OPT),)
   USE_OPT = -O2 -ggdb -fomit-frame-pointer -falign-functions=16 -fsingle-precision-constant
 endif
 
+USE_OPT += -DWB_PROD=1
+
 # C specific options here (added to USE_OPT).
 ifeq ($(USE_COPT),)
   USE_COPT = 
@@ -163,6 +165,7 @@ CPPSRC = $(ALLCPPSRC) \
           console/binary/tunerstudio_io_serial.cpp \
           console/binary/tunerstudio_commands.cpp \
           sampling_thread.cpp \
+          heater_control.cpp \
           main.cpp
 
 # List ASM source files here.

firmware/boards/port.h

@@ -1,6 +1,8 @@
 #pragma once
 
-#include "hal.h"
+#include <cstdint>
+#include <cstddef>
+
 #include "port_shared.h"
 #include "wideband_config.h"
 

firmware/boards/port_shared.h

@@ -1,4 +1,9 @@
-#include "ch.h"
+#pragma once
+
+#if WB_PROD
+
 #include "hal.h"
 
 const CANConfig& GetCanConfig();
+
+#endif // WB_PROD

firmware/wideband.mk

@@ -1,3 +1,2 @@
 WIDEBANDSRC = \
 	$(FIRMWARE_DIR)/sampling.cpp \
-	$(FIRMWARE_DIR)/heater_control.cpp \

test/Makefile

@@ -37,6 +37,7 @@ INCDIR += \
 	$(PROJECT_DIR)/googletest/googletest/include \
 	$(RUSEFI_LIB_INC) \
 	$(FIRMWARE_DIR) \
+	$(FIRMWARE_DIR)/boards \
 
 # User may want to pass in a forced value for SANITIZE
 ifeq ($(SANITIZE),)
@@ -63,6 +64,8 @@ ifeq ($(USE_OPT),)
   USE_OPT += -Werror=missing-field-initializers
 endif
 
+USE_OPT += -DWB_PROD=0
+
 # C specific options here (added to USE_OPT).
 ifeq ($(USE_COPT),)
   USE_COPT = -std=gnu99 -fgnu89-inline
@@ -70,7 +73,7 @@ endif
 
 # C++ specific options here (added to USE_OPT).
 ifeq ($(USE_CPPOPT),)
-  USE_CPPOPT = -std=gnu++2a -fno-rtti -fno-use-cxa-atexit
+  USE_CPPOPT = -std=c++17 -fno-rtti -fno-use-cxa-atexit
 endif
 
 # Enable address sanitizer for C++ files, but not on Windows since x86_64-w64-mingw32-g++ doesn't support it.
@@ -137,7 +140,7 @@ BIN  = $(CP) -O binary
 CWARN = -Wall -Wextra -Wstrict-prototypes -pedantic -Wmissing-prototypes -Wold-style-definition
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra -Werror -pedantic -Wno-error=sign-compare
+CPPWARN = -Wall -Wextra -Werror -Wno-error=sign-compare
 
 #
 # Compiler settings

test/io_pins.h

@@ -0,0 +1,3 @@
+#pragma once
+
+// Nothing here - stub file since tests have no IO

test/tests/test_sampler.cpp

@@ -1,6 +1,18 @@
 #include <gtest/gtest.h>
 
 #include "sampling.h"
+#include "port.h"
+
+SensorType GetSensorType()
+{
+    return SensorType::LSU49;
+}
+
+int GetESRSupplyR()
+{
+    // Nernst AC injection resistor value
+    return 22000;
+}
 
 TEST(Sampler, Basic)
 {

test/wideband_board_config.h

@@ -0,0 +1,19 @@
+#pragma once
+
+// Fundamental board constants
+#define VCC_VOLTS (3.3f)
+#define HALF_VCC (VCC_VOLTS / 2)
+#define ADC_MAX_COUNT (4095)
+#define ADC_OVERSAMPLE 24
+
+// *******************************
+//    Nernst voltage & ESR sense
+// *******************************
+#define NERNST_INPUT_GAIN (1 / 2.7f)
+
+#define AFR_CHANNELS 1
+
+// *******************************
+//    Nernst voltage & ESR sense
+// *******************************
+#define VM_RESISTOR_VALUE (10)