make cpp version work

cpp/CMakeLists.txt

@@ -14,3 +14,5 @@ add_subdirectory(test-catch2)
 add_subdirectory(test-doctest)
 add_subdirectory(test-gtest)
 
+add_executable(main main.cpp)
+target_link_libraries(main src)

cpp/main.cpp

@@ -0,0 +1,22 @@
+#include "Stepper.h"
+#include <unistd.h>
+
+int main(int argc, char *argv[]) {
+
+    // create an instance of the stepper class with suitable pins set up
+    Stepper stepper(8, 10, 9, 11);
+
+    // configure the stepper motor speed in RPM
+    stepper.setSpeed(10);
+
+    // move the motor the number of steps indicated by val
+    uint8_t val = 42;
+    stepper.move_clockwise(val);
+
+    // wait for the stepper motor to finish moving
+    while(stepper.isRunning()) {
+        sleep(1);
+    }
+
+}
+

cpp/src/CMakeLists.txt

@@ -1,5 +1,7 @@
 set(SRC_LIB_NAME src)
-set(SOURCES sample.cpp)
+set(SOURCES
+        Stepper.cpp
+        Stepper.h)
 add_library(${SRC_LIB_NAME} ${SOURCES})
 target_sources(${SRC_LIB_NAME} PRIVATE ${SOURCES})
 target_include_directories(${SRC_LIB_NAME} PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})

cpp/src/Stepper.cpp

@@ -0,0 +1,22 @@
+
+
+#include "Stepper.h"
+
+void Stepper::setSpeed(uint8_t speed) {
+    _speed = speed;
+}
+
+void Stepper::move_clockwise(uint8_t steps) {
+    // logic to activate the relevant pins is omitted in this exercise
+}
+
+void Stepper::move_anticlockwise(uint8_t steps) {
+    // logic to activate the relevant pins is omitted in this exercise
+}
+
+bool Stepper::isRunning() {
+    // logic to read the pins and determine this omitted in this exercise
+    return false;
+}
+
+

cpp/src/Stepper.h

@@ -0,0 +1,42 @@
+#ifndef STEPPER_H
+#define STEPPER_H
+
+#include <cstdint>
+
+// the number of steps to rotate a complete circle of 360 degrees
+#define STEPS 2048
+
+// the maximum speed of the motor in RPM
+#define MAX_SPEED = 15
+
+/*
+ * This class is a placeholder for a real object that would be able to
+ * control an electric stepper motor.
+ */
+class Stepper {
+public:
+    explicit Stepper(
+        const uint8_t pin1 = 8,
+        const uint8_t pin2 = 9,
+        const uint8_t pin3 = 10,
+        const uint8_t pin4 = 11): _speed(10) {
+    };
+
+    // Set the speed of the motor in RPM. Maximum is defined above.
+    void setSpeed(uint8_t);
+
+    // Move the indicated number of steps. The size of a step is defined above.
+    void move_clockwise(uint8_t steps);
+
+    void move_anticlockwise(uint8_t steps);
+
+    // Whether the motor is currently moving.
+    // Motors that are moving should not be given new instructions.
+    bool isRunning();
+
+private:
+    int _speed;
+};
+
+
+#endif //STEPPER_H

cpp/test-gtest/sample_gtest.cpp

@@ -1,7 +1,5 @@
 #include <gtest/gtest.h>
 
-#include "sample.h"
-
 using namespace std;
 
 TEST(SampleSuite, SampleTest) {