Add HAL SPI implementation

include/sta/hal/spi.hpp

@@ -0,0 +1,70 @@
+/**
+ * @brief Implementations for SpiInterface and SpiDevice using HAL.
+ *
+ * Define STA_HAL_SPI_ENABLE in <sta/config.hpp> to enable.
+ * Requires STA_HAL_GPIO_ENABLE.
+ */
+#ifndef STA_HAL_SPI_HPP
+#define STA_HAL_SPI_HPP
+
+#include <sta/config.hpp>
+#ifdef STA_HAL_SPI_ENABLE
+
+#include <sta/spi_device.hpp>
+#include <sta/hal/gpio_pin.hpp>
+
+#include <main.h>
+
+
+namespace sta
+{
+	/**
+	 * @brief Implementation of SpiInterface using HAL.
+	 */
+	class HalSpiInterface : public SpiInterface
+	{
+	public:
+		/**
+		 * @param handle    SPI handle
+		 * @param mutex     Mutex object for managing access. Pass nullptr for no access control
+		 */
+		HalSpiInterface(SPI_HandleTypeDef * handle, Mutex * mutex = nullptr);
+
+		void transfer(uint8_t value) override;
+		void transfer(const uint8_t * buffer, size_t size) override;
+		void transfer16(uint16_t value) override;
+
+		void fill(uint8_t value, size_t count) override;
+		void fill32(uint32_t value, size_t count) override;
+
+		void receive(uint8_t * buffer, size_t size) override;
+
+	private:
+		SPI_HandleTypeDef * handle_;    /**< SPI handle */
+	};
+
+
+	/**
+	 * @brief Implementation of SpiDevice using HAL.
+	 */
+	class HalSpiDevice : public SpiDevice
+	{
+	public:
+		/**
+		 * @param intf      SPI interface
+		 * @param csPin     Device CS pin
+		 */
+		HalSpiDevice(SpiInterface * intf, HalGpioPin csPin);
+
+		void select() override;
+		void deselect() override;
+
+	private:
+		HalGpioPin csPin_;  /**< Device CS pin */
+	};
+} // namespace sta
+
+
+#endif // STA_HAL_SPI_ENABLE
+
+#endif // STA_HAL_SPI_HPP