Revision 0:0ae9963c4e06, committed 2012-03-27

Comitter:

charly

Date:

Tue Mar 27 20:13:41 2012 +0000

Child:

1:d7cc0e2a55ba

Commit message:

Initial version of TextLCDScroll

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TextLCDScroll.cpp	Tue Mar 27 20:13:41 2012 +0000
@@ -0,0 +1,106 @@
+#include "TextLCDScroll.h"
+#include "mbed.h"
+
+#include <string>
+using namespace std;
+
+    TextLCDScroll::TextLCDScroll(PinName rs, PinName e, PinName d4, PinName d5,
+                  PinName d6, PinName d7, TextLCD::LCDType type): TextLCD(rs,e,d4,d5,d6,d7,type) {
+
+        _direction = new int[rows()];
+        _actPos = new int[rows()];
+        _stringArray = new string[rows()];
+        for (int i=0; i<rows(); i++) {
+            _direction[i]=1;
+            _actPos[i] = 0;
+            _stringArray[i] = "";
+        }
+        _spaces = string(columns(),' ');
+        //_mode = leftright;
+        _mode = left;
+
+        setSpeed(5);
+
+    }
+
+
+    bool TextLCDScroll::setLine( int Line, string str) {
+        if (Line >= 0 && Line < rows()) {
+            if ((str.length() > columns()) && (_mode == left))
+                _stringArray[Line] = _spaces + str + _spaces;
+            else
+                _stringArray[Line] = str;
+
+            // be sure to refresh the display
+            cls();
+            // start at beginning again
+            _actPos[Line] = 0;
+            _direction[Line] =1;
+            return(true);
+        } else {
+            return (false);
+        }
+    }
+
+    bool TextLCDScroll::setSpeed( int speed) {
+        if ((speed >= 0.1) && (speed <= 10)) {
+            tick.detach();
+            if (_mode == leftright)
+                tick.attach(this,&TextLCDScroll::ScrollRightLeft, 1.0/speed);
+            else
+                tick.attach(this,&TextLCDScroll::ScrollLeft, 1.0/speed);
+            return(true);
+        } else {
+            return(false);
+        }
+    }
+
+    bool TextLCDScroll::setScrollMode( ScrollModes mode) {
+        _mode = mode;
+        return(true);
+    }
+
+    void TextLCDScroll::ScrollRightLeft() {
+        int i;
+        for (i=0; i<rows(); i++) {
+            locate(0,i);
+            if (_stringArray[i].length() > columns()) {
+                printf(_stringArray[i].substr(_actPos[i],columns()).c_str());
+                if (_direction[i] == 1) {
+                    if (_stringArray[i].length() > _actPos[i]+columns()) {
+                        _actPos[i] += 1;
+                    } else {
+                        _direction[i] = -1;
+                    }
+                } else {
+                    if (_actPos[i] > 0) {
+                        _actPos[i] -= 1;
+                    } else {
+                        _direction[i]=1;
+                    }
+                }
+            } else {
+                printf(_stringArray[i].c_str());
+            }
+        }
+    }
+
+    void TextLCDScroll::ScrollLeft() {
+        int i;
+        for (i=0; i<rows(); i++) {
+            locate(0,i);
+            if (_stringArray[i].length() > columns()) {
+                printf(_stringArray[i].substr(_actPos[i],columns()).c_str());
+                if (_direction[i] == 1) {
+                    if (_stringArray[i].length() > _actPos[i]+columns()) {
+                        _actPos[i] += 1;
+                    } else {
+                        _actPos[i]=0;
+                    }
+                }
+            } else {
+                printf(_stringArray[i].c_str());
+            }
+        }
+    }
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TextLCDScroll.h	Tue Mar 27 20:13:41 2012 +0000
@@ -0,0 +1,99 @@
+/* mbed Library for scrolling text in Text-LCDs based on the Class TextLCD
+ * Copyright by Karl Zweimueller
+ *
+ * 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 TEXTLCDSCROLL_H
+#define TEXTLCDSCROLL_H
+
+#include "TextLCD.h"
+
+#include <string>
+using namespace std;
+
+/** TextLCDScroll class which handles horizontal scrolling text if it doesn't fit in one line, based on class TextLCD
+  *
+  * Example:
+  * @code
+  * #include "TextLCDScroll.h"
+  * #include "mbed.h"
+  *
+  * TextLCDScroll lcd(p30, p29, p28, p27, p26, p25, TextLCD::LCD16x2); // rs, e, d0-d3
+  *
+  * int main() {
+  *
+  *     lcd.cls();
+  *     lcd.setLine(0,"TextLCDScroll!");
+  *     lcd.setLine(1,"This line can be rather long. The quick brown fox jumps over the lazy dog.");
+  * }
+  * @endcode
+*/
+class TextLCDScroll: public TextLCD {
+public:
+
+    /** How should we scroll horizontal in one line
+      */
+    enum ScrollModes {
+        leftright,    /** Scroll left ande the right */
+        left          /** Scroll only left - default */
+    };
+
+    /** Create a TextLCDScroll Object with pins and Type from TextLCD
+      *
+      * @param rs    Instruction/data control line
+      * @param e     Enable line (clock)
+      * @param d4-d7 Data lines for using as a 4-bit interface
+      * @param type  Sets the panel size/addressing mode (default = LCD16x2)
+      */
+    TextLCDScroll(PinName rs, PinName e, PinName d4, PinName d5,
+                  PinName d6, PinName d7, TextLCD::LCDType type);
+
+
+    /** Display a string str on line Line. Replaces old text on Line.
+      * @param  Line    Line, where text should be displayed. first Line=0
+      * @param  str     the string to display
+      */
+    bool setLine( int Line, string str);
+
+    /** Set the speed, how fast to scroll the text in Characters per Seconds
+     * @param  speed Speed for scrolling in Characters per Second. Range 0.1 ... 10
+     */
+    bool setSpeed( int speed);
+
+    /** Set the Scroll-Mode. Deault "left"
+      * @param  mode    a valid mode. See ScrollModes
+      */
+    bool setScrollMode( ScrollModes mode);
+
+private:
+
+    void ScrollRightLeft();
+
+    void ScrollLeft();
+
+    Ticker tick;
+    int* _direction;
+    int* _actPos;
+    string* _stringArray;
+    string _spaces;
+    ScrollModes _mode;
+};
+
+#endif
\ No newline at end of file