Use new SPI settings

include/sta/hal/spi.hpp

@@ -45,6 +45,7 @@ namespace sta
 
 		void receive(uint8_t * buffer, size_t size) override;
 
+
 	private:
 		SPI_HandleTypeDef * handle_;    /**< SPI handle */
 	};

include/sta/spi_device.hpp

@@ -87,6 +87,15 @@ namespace sta
 		 */
 		void receive(uint8_t * buffer, size_t size);
 
+
+		/**
+		 * @brief Get SPI interface settings.
+		 *
+		 * @return SPI settings
+		 */
+		const SpiSettings & settings() const;
+
+
 		/**
 		 * @brief Activate device via CS pin.
 		 */

include/sta/spi_interface.hpp

@@ -5,6 +5,7 @@
 #define STA_SPI_INTERFACE_HPP
 
 #include <sta/mutex.hpp>
+#include <sta/spi_settings.hpp>
 
 #include <stdint.h>
 #include <stddef.h>
@@ -19,9 +20,10 @@ namespace sta
 	{
 	public:
 		/**
+		 * @param settings  SPI interface settings
 		 * @param mutex     Mutex object for managing shared access. Pass nullptr for no access control
 		 */
-		SpiInterface(Mutex * mutex = nullptr);
+		SpiInterface(const SpiSettings & settings, Mutex * mutex = nullptr);
 
 
 		/**
@@ -76,6 +78,15 @@ namespace sta
 		 */
 		virtual void receive(uint8_t * buffer, size_t size) = 0;
 
+
+		/**
+		 * @brief Get SPI interface settings.
+		 *
+		 * @return SPI settings
+		 */
+		const SpiSettings & settings() const;
+
+
 		/**
 		 * @brief Acquire usage rights to use the interface.
 		 *
@@ -90,7 +101,8 @@ namespace sta
 		virtual void release();
 
 	private:
-		Mutex * mutex_;	/**< Mutex object */
+		SpiSettings settings_;  /** SPI settings */
+		Mutex * mutex_;	        /**< Mutex object */
 	};
 } // namespace sta
 

src/hal/spi.cpp

@@ -3,12 +3,71 @@
 #ifdef STA_HAL_SPI_ENABLE
 
 #include <sta/assert.hpp>
+#include <sta/lang.hpp>
 
 
 namespace sta
 {
+	static SpiSettings getHalSpiSettings(SPI_HandleTypeDef * handle)
+	{
+		SpiSettings settings;
+
+		settings.mode        = getSpiMode(
+			(handle->Init.CLKPolarity == SPI_POLARITY_LOW) ? SpiClkPolarity::LOW : SpiClkPolarity::HIGH,
+			(handle->Init.CLKPhase == SPI_PHASE_1EDGE) ? SpiClkPhase::EDGE_1 : SpiClkPhase::EDGE_2
+		);
+		settings.dataSize    = (handle->Init.DataSize == SPI_DATASIZE_8BIT) ? SpiDataSize::BIT_8 : SpiDataSize::BIT_16;
+		settings.bitOrder    = (handle->Init.FirstBit == SPI_FIRSTBIT_MSB) ? SpiBitOrder::MSB : SpiBitOrder::LSB;
+
+		uint32_t prescaler = 1;
+		switch (handle->Init.BaudRatePrescaler)
+		{
+		case SPI_BAUDRATEPRESCALER_2:
+			settings.baudRatePrescaler = SpiBaudRatePrescaler::BRP_2;
+			prescaler = 2;
+			break;
+		case SPI_BAUDRATEPRESCALER_4:
+			settings.baudRatePrescaler = SpiBaudRatePrescaler::BRP_4;
+			prescaler = 2;
+			break;
+		case SPI_BAUDRATEPRESCALER_8:
+			settings.baudRatePrescaler = SpiBaudRatePrescaler::BRP_8;
+			prescaler = 2;
+			break;
+		case SPI_BAUDRATEPRESCALER_16:
+			settings.baudRatePrescaler = SpiBaudRatePrescaler::BRP_16;
+			prescaler = 2;
+			break;
+		case SPI_BAUDRATEPRESCALER_32:
+			settings.baudRatePrescaler = SpiBaudRatePrescaler::BRP_32;
+			prescaler = 2;
+			break;
+		case SPI_BAUDRATEPRESCALER_64:
+			settings.baudRatePrescaler = SpiBaudRatePrescaler::BRP_64;
+			prescaler = 2;
+			break;
+		case SPI_BAUDRATEPRESCALER_128:
+			settings.baudRatePrescaler = SpiBaudRatePrescaler::BRP_128;
+			prescaler = 2;
+			break;
+		case SPI_BAUDRATEPRESCALER_256:
+			settings.baudRatePrescaler = SpiBaudRatePrescaler::BRP_256;
+			prescaler = 2;
+			break;
+		default:
+			// Unreachable case
+			STA_ASSERT_MSG(false, "Case for SPI_BAUDRATEPRESCALER not handled");
+			STA_UNREACHABLE();
+		}
+
+		settings.clkSpeed = HAL_RCC_GetSysClockFreq() / prescaler;
+
+		return settings;
+	}
+
+
 	HalSpiInterface::HalSpiInterface(SPI_HandleTypeDef * handle, Mutex * mutex /* = nullptr */)
-		: SpiInterface(mutex), handle_{handle}
+		: SpiInterface(getHalSpiSettings(handle), mutex), handle_{handle}
 	{
 		STA_ASSERT(handle != nullptr);
 	}
@@ -38,7 +97,7 @@ namespace sta
 
 	void HalSpiInterface::transfer16(uint16_t value)
 	{
-		static_assert(sizeof(uint16_t) == 2);
+		static_assert(sizeof(uint16_t) == 2, "Unexpected uint16_t size");
 
 		HAL_SPI_Transmit(handle_, reinterpret_cast<uint8_t *>(&value), 2, HAL_MAX_DELAY);
 	}
@@ -56,7 +115,7 @@ namespace sta
 
 	void HalSpiInterface::fill32(uint32_t value, size_t count)
 	{
-		static_assert(sizeof(uint32_t) == 4);
+		static_assert(sizeof(uint32_t) == 4, "Unexpected uint32_t size");
 		STA_ASSERT(count != 0);
 
 		for (size_t i = 0; i < count; ++i)

src/spi_device.cpp

@@ -74,4 +74,9 @@ namespace sta
 
 		intf_->receive(buffer, size);
 	}
+
+	const SpiSettings & SpiDevice::settings() const
+	{
+		return intf_->settings();
+	}
 } // namespace sta

src/spi_interface.cpp

@@ -3,10 +3,15 @@
 
 namespace sta
 {
-	SpiInterface::SpiInterface(Mutex * mutex /* = nullptr */)
+	SpiInterface::SpiInterface(const SpiSettings & settings, Mutex * mutex /* = nullptr */)
-		: mutex_{mutex}
+		: settings_{settings}, mutex_{mutex}
 	{}
 
+	const SpiSettings & SpiInterface::settings() const
+	{
+		return settings_;
+	}
+
 	void SpiInterface::acquire()
 	{
 		if (mutex_ != nullptr)