Diff: LCDConsole.h

Revision:

0:084d1dae2ea1

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LCDConsole.h	Sun Aug 19 05:20:21 2018 +0000
@@ -0,0 +1,123 @@
+/*
+ * LCDStreamHandle.h
+ *
+ *  Created on: 2018Äê2ÔÂ25ÈÕ
+ *      Author: caoyuan9642
+ */
+
+#ifndef LCDCONSOLE_H_
+#define LCDSTREAMHANDLE_H_
+
+#include "mbed.h"
+#include "LCD_DISCO_F429ZI.h"
+
+class LCDConsole: public FileLike
+{
+protected:
+
+	static int* buffer; // The first 3 byets of each int contain its color, and last byte contain the content
+	static int *head, *tail;
+	static Mutex mutex;
+	static LCD_DISCO_F429ZI lcd;
+	static Thread thread;
+	static bool inited;
+	static int x0, y0, width, height;
+	static int textwidth, textheight, buffersize;
+	static Semaphore sem_update;
+
+	uint32_t color;
+
+	static void task_thread();
+public:
+
+	static void init(int x0, int y0, int width, int height);
+	/** Redirects the stdout the stderr
+	 *  @param tolcd If true, stdout and stderr will be redirected to the console.
+	 *  If false, it will be redirected back to serial
+	 */
+	static void redirect(bool tolcd);
+
+	static LCD_DISCO_F429ZI &getLCD()
+	{
+		return lcd;
+	}
+
+	// Can initialize multiple instances
+	LCDConsole(const char *name, uint32_t color);
+	virtual ~LCDConsole()
+	{
+	}
+
+	/** Read the contents of a file into a buffer
+	 *
+	 *  Devices acting as FileHandles should follow POSIX semantics:
+	 *
+	 *  * if no data is available, and non-blocking set return -EAGAIN
+	 *  * if no data is available, and blocking set, wait until some data is available
+	 *  * If any data is available, call returns immediately
+	 *
+	 *  @param buffer   The buffer to read in to
+	 *  @param size     The number of bytes to read
+	 *  @return         The number of bytes read, 0 at end of file, negative error on failure
+	 */
+	virtual ssize_t read(void *buffer, size_t size);
+
+	/** Write the contents of a buffer to a file
+	 *
+	 *  Devices acting as FileHandles should follow POSIX semantics:
+	 *
+	 * * if blocking, block until all data is written
+	 * * if no data can be written, and non-blocking set, return -EAGAIN
+	 * * if some data can be written, and non-blocking set, write partial
+	 *
+	 *  @param buffer   The buffer to write from
+	 *  @param size     The number of bytes to write
+	 *  @return         The number of bytes written, negative error on failure
+	 */
+	virtual ssize_t write(const void *buffer, size_t size);
+
+	/** Move the file position to a given offset from from a given location
+	 *
+	 *  @param offset   The offset from whence to move to
+	 *  @param whence   The start of where to seek
+	 *      SEEK_SET to start from beginning of file,
+	 *      SEEK_CUR to start from current position in file,
+	 *      SEEK_END to start from end of file
+	 *  @return         The new offset of the file, negative error code on failure
+	 */
+	virtual off_t seek(off_t offset, int whence = SEEK_SET);
+
+	/** Close a file
+	 *
+	 *  @return         0 on success, negative error code on failure
+	 */
+	virtual int close();
+	/** Check for poll event flags
+	 * The input parameter can be used or ignored - the could always return all events,
+	 * or could check just the events listed in events.
+	 * Call is non-blocking - returns instantaneous state of events.
+	 * Whenever an event occurs, the derived class should call the sigio() callback).
+	 *
+	 * @param events        bitmask of poll events we're interested in - POLLIN/POLLOUT etc.
+	 *
+	 * @returns             bitmask of poll events that have occurred.
+	 */
+	virtual short poll(short events) const
+	{
+		// Possible default for real files
+		return POLLOUT;
+	}
+	/** Check if the file in an interactive terminal device
+	 *
+	 *  @return         True if the file is a terminal
+	 *  @return         False if the file is not a terminal
+	 *  @return         Negative error code on failure
+	 */
+	virtual int isatty()
+	{
+		return true;
+	}
+};
+
+#endif /* LCDCONSOLE_H_ */
+