From 221b455e43ca30d1376af22b2712fdb15a9ebebf Mon Sep 17 00:00:00 2001
From: Henrik Stickann <4376396-Mithradir@users.noreply.gitlab.com>
Date: Sat, 9 Apr 2022 21:49:20 +0200
Subject: [PATCH] Add HAL UART implementation

---
 include/sta/hal/uart.hpp | 53 ++++++++++++++++++++++++++++++++++++++++
 src/hal/uart.cpp         | 32 ++++++++++++++++++++++++
 2 files changed, 85 insertions(+)
 create mode 100644 include/sta/hal/uart.hpp
 create mode 100644 src/hal/uart.cpp

diff --git a/include/sta/hal/uart.hpp b/include/sta/hal/uart.hpp
new file mode 100644
index 0000000..b9dd65e
--- /dev/null
+++ b/include/sta/hal/uart.hpp
@@ -0,0 +1,53 @@
+/**
+ * @brief Implementation for UART using HAL.
+ *
+ * Define STA_HAL_UART_ENABLE in <sta/config.hpp> to enable.
+ *
+ * To enable the global DebugSerial instance (example using UART1) define:
+ *   #define STA_HAL_UART_DEBUG huart1
+ */
+#ifndef STA_HAL_UART_HPP
+#define STA_HAL_UART_HPP
+
+#include <sta/config.hpp>
+#ifdef STA_HAL_UART_ENABLE
+
+#include <sta/uart.hpp>
+
+#include <main.h>
+
+
+namespace sta
+{
+	/**
+	 * @brief Implementation of UART for HAL.
+	 */
+	class HalUART : public UART
+	{
+	public:
+		/**
+		 * @param handle    UART handle
+		 */
+		HalUART(UART_HandleTypeDef * handle);
+
+		using UART::print;
+
+		void write(const uint8_t * buffer, size_t size) override;
+
+	private:
+		UART_HandleTypeDef * handle_;   /**< UART handle */
+	};
+
+
+#ifdef STA_HAL_UART_DEBUG
+	/**
+	 * @brief Global UART instance for debug output.
+	 */
+	extern HalUART DebugSerial;
+#endif // STA_HAL_UART_DEBUG
+} // namespace sta
+
+
+#endif // STA_HAL_UART_ENABLE
+
+#endif // STA_HAL_UART_HPP
diff --git a/src/hal/uart.cpp b/src/hal/uart.cpp
new file mode 100644
index 0000000..9413a28
--- /dev/null
+++ b/src/hal/uart.cpp
@@ -0,0 +1,32 @@
+#include <sta/hal/uart.hpp>
+
+#ifdef STA_HAL_UART_ENABLE
+
+
+namespace sta
+{
+	HalUART::HalUART(UART_HandleTypeDef * handle)
+		: handle_{handle}
+	{}
+
+
+	void HalUART::write(const uint8_t * buffer, size_t size)
+	{
+		HAL_UART_Transmit(handle_, const_cast<uint8_t *>(buffer), size, HAL_MAX_DELAY);
+	}
+} // namespace sta
+
+
+#ifdef STA_HAL_UART_DEBUG
+
+#include <usart.h>
+
+namespace sta
+{
+	HalUART DebugSerial(&STA_HAL_UART_DEBUG);
+} // namespace sta
+
+#endif // STA_HAL_UART_DEBUG
+
+
+#endif // STA_HAL_UART_ENABLE