Revision 0:633dd0246854, committed 2013-05-19

Comitter:

KentaShimizu

Date:

Sun May 19 16:08:07 2013 +0000

Commit message:

Buffering Serial receive data class

Changed in this revision

diff -r 000000000000 -r 633dd0246854 BufferSerial.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BufferSerial.cpp	Sun May 19 16:08:07 2013 +0000
@@ -0,0 +1,57 @@
+#include "BufferSerial.h"
+
+BufferSerial :: BufferSerial( PinName tx , PinName rx ) : Serial( tx , rx ) {
+    _setup( 1 );
+}
+
+BufferSerial :: BufferSerial( PinName tx , PinName rx , const int& bufferSize ) : Serial( tx , rx ) {
+    _setup( bufferSize );
+}
+
+BufferSerial :: BufferSerial( PinName tx , PinName rx , const int& bufferSize , const char* name ) : Serial( tx , rx , name ) {
+    _setup( bufferSize );
+}
+
+BufferSerial :: ~BufferSerial() {
+    delete[] _buf;
+}
+
+void BufferSerial :: _setup( const int& bufferSize ) {
+    if ( bufferSize > 1 ){
+        _buf = new unsigned char[ bufferSize ];
+        _size = bufferSize - 1;
+    }else{
+        _buf = new unsigned char[ 2 ];
+        _size = 1;
+    }
+    _present = 0;
+    _last = 0;
+    attach( this, & BufferSerial :: _irq );
+}
+
+int BufferSerial :: _getShift( const int& value ) {
+    return value ? ( value - 1 ) : _size ;
+}
+
+void BufferSerial :: _irq( void ) {
+    int n = _getShift( _last );
+    _buf[ n ] = (unsigned char)( Serial :: getc() );
+    _last = n;
+}
+
+int BufferSerial :: unreadable( void ) {
+    return ( _present == _last );
+}
+
+int BufferSerial :: readable( void ) {
+    return ! unreadable();
+}
+
+int BufferSerial :: getc( void ) {
+    if ( unreadable() ){
+        return -1;
+    }else{
+        _present = _getShift( _present );
+        return (int)_buf[ _present ];
+    }
+}

diff -r 000000000000 -r 633dd0246854 BufferSerial.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BufferSerial.h	Sun May 19 16:08:07 2013 +0000
@@ -0,0 +1,32 @@
+/* mbed BufferSerial Library
+ * Copyright (c) 2013 KentaShimizu
+ * Version 0.1 (May 18, 2013)
+ * Released under the MIT License: http://mbed.org/license/mit
+ */
+
+#ifndef _IG_BUFFERSERIAL_20130518
+#define _IG_BUFFERSERIAL_20130518
+ 
+#include "mbed.h"
+
+class BufferSerial : public Serial {
+private:
+protected:
+    int _size;
+    int _present;
+    int _last;
+    unsigned char* _buf;
+    void _setup( const int& size );
+    int _getShift( const int& value );
+    void _irq( void );
+public:
+    BufferSerial( PinName tx , PinName rx );
+    BufferSerial( PinName tx , PinName rx , const int& bufferSize );
+    BufferSerial( PinName tx , PinName rx , const int& bufferSize , const char* name );
+    virtual ~BufferSerial();
+    virtual int getc( void );
+    virtual int unreadable( void );
+    virtual int readable( void );
+};
+
+#endif