Diff: SerialBuffered.h

Revision:

0:7e4786a3584b

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+++ b/SerialBuffered.h	Thu Oct 11 20:49:25 2012 +0000
@@ -0,0 +1,89 @@
+/**
+ * =============================================================================
+ * LS-Y201 device driver class (Version 0.0.1)
+ * Reference documents: LinkSprite JPEG Color Camera Serial UART Interface
+ *                      January 2010
+ * =============================================================================
+ * Copyright (c) 2010 Shinichiro Nakamura (CuBeatSystems)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ * =============================================================================
+ */
+ 
+#ifndef _SERIAL_BUFFERED_H_
+#define _SERIAL_BUFFERED_H_
+ 
+/**
+ * Buffered serial class.
+ */
+class SerialBuffered : public Serial {
+public:
+    /**
+     * Create a buffered serial class.
+     *
+     * @param tx A pin for transmit.
+     * @param rx A pin for receive.
+     */
+    SerialBuffered(PinName tx, PinName rx);
+ 
+    /**
+     * Destroy.
+     */
+    virtual ~SerialBuffered();
+ 
+    /**
+     * Get a character.
+     *
+     * @return A character. (-1:timeout)
+     */
+    int getc();
+ 
+    /**
+     * Returns 1 if there is a character available to read, 0 otherwise.
+     */
+    int readable();
+ 
+    /**
+     * Set timeout for getc().
+     *
+     * @param ms milliseconds. (-1:Disable timeout)
+     */
+    void setTimeout(int ms);
+ 
+    /**
+     * Read requested bytes.
+     *
+     * @param bytes A pointer to a buffer.
+     * @param requested Length.
+     *
+     * @return Readed byte length.
+     */
+    size_t readBytes(uint8_t *bytes, size_t requested);
+ 
+private:
+    void handleInterrupt();
+    static const int BUFFERSIZE = 4096;
+    uint8_t buffer[BUFFERSIZE];            // points at a circular buffer, containing data from m_contentStart, for m_contentSize bytes, wrapping when you get to the end
+    uint16_t indexContentStart;   // index of first bytes of content
+    uint16_t indexContentEnd;     // index of bytes after last byte of content
+    int timeout;
+    Timer timer;
+};
+ 
+#endif
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