Added gpio pin implementation for raspi

include/sta/gpio_pin.hpp

@@ -21,8 +21,8 @@ namespace sta
      */
     enum class GpioPinState
     {
-        LOW,
+        GPIO_LOW,
-        HIGH
+        GPIO_HIGH
     };
 
     /**

include/sta/raspi/gpio_pin.hpp

@@ -0,0 +1,42 @@
+#ifndef STA_CORE_RASPI_GPIO_PIN_HPP
+#define STA_CORE_RASPI_GPIO_PIN_HPP
+
+// Only enable module on Raspi platform w/ HAL GPIO module enabled
+#include <sta/config.hpp>
+#ifdef STA_PLATFORM_RASPI
+#   include <sta/raspi/hal.hpp>
+#   define STA_RASPI_GPIO_ENABLED
+#endif // STA_PLATFORM_RASPI
+
+#if defined(STA_RASPI_GPIO_ENABLED) || defined(DOXYGEN)
+
+#include <sta/gpio_pin.hpp>
+#include <cstdint>
+
+namespace sta 
+{
+    class RaspiGpioPin : GpioPin
+    {
+    public: 
+        enum class GpioMode {
+            GPIO_OUTPUT,
+            GPIO_INPUT
+        };
+
+        /**
+         * @param pin   Pin index
+         * @param mode  The mode of the GPIO pin. Either INPUT or OUTPUT
+         */
+        RaspiGpioPin(uint8_t pin, GpioMode mode);
+
+        void setState(GpioPinState state) override;
+
+    private:
+        uint8_t pin_;
+        GpioMode mode_;
+    };
+} // namespace sta
+
+#endif // STA_RASPI_GPIO_ENABLED
+
+#endif // STA_CORE_RASPI_GPIO_PIN_HPP

include/sta/raspi/hal.hpp

@@ -1,13 +1,8 @@
 #ifndef STA_CORE_RASPI_HAL_HPP
 #define STA_CORE_RASPI_HAL_HPP
 
-namespace sta {
+#include <wiringPi.h>
-
+#include <wiringPiSPI.h>
-B
+#include <wiringPiI2C.h>
-A
-A
-D
-D
-}
 
 #endif //STA_CORE_RASPI_HAL_HPP

include/sta/raspi/spi.hpp

@@ -0,0 +1,19 @@
+#ifndef STA_CORE_RASPI_SPI_HPP
+#define STA_CORE_RASPI_SPI_HPP
+
+#include <sta/spi/device.hpp>
+
+namespace sta 
+{
+    class RaspiSPI : SPI 
+    {
+
+    };
+
+    class RaspiSPIDevice : SPIDevice 
+    {
+
+    };
+} // namespace sta
+
+#endif // STA_CORE_RASPI_HPP

src/raspi/gpio_pin.cpp

@@ -0,0 +1,21 @@
+#include <sta/raspi/gpio_pin.hpp>
+#ifdef STA_RASPI_GPIO_ENABLED
+
+#include <sta/assert.hpp>
+#include <sta/lang.hpp>
+
+namespace sta 
+{
+    RaspiGpioPin::RaspiGpioPin(uint8_t pin, GpioMode mode) : pin_{pin}, mode_{mode} 
+    {
+        pinMode(pin, mode == GpioMode::GPIO_INPUT ? INPUT : OUTPUT);
+    }
+
+    void RaspiGpioPin::setState(GpioPinState state)
+    {
+        digitalWrite(pin_, state == GpioPinState::GPIO_LOW ? LOW : HIGH);
+    }
+} // namespace sta
+
+
+#endif // STA_ARDUINO_GPIO_ENABLED