Diff: freetronicsLCDShield.cpp

Revision:

1:ddcefddda4a7

Parent:

0:01f3d38f8b6d

Child:

4:b4b2435f4a7f

--- a/freetronicsLCDShield.cpp	Tue Oct 08 08:46:39 2013 +0000
+++ b/freetronicsLCDShield.cpp	Sun Oct 27 07:07:53 2013 +0000
@@ -1,3 +1,25 @@
+/* mbed freetronicsLCDShield Library, written by Koen J.F. Kempeneers
+ * koen.kempeneers@damiaaninstituut.be
+ *
+ * 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.
+ */
+
 #include "mbed.h"
 #include "freetronicsLCDShield.h"
 
@@ -54,11 +76,17 @@
     writeCommand(0x0C + tmp);
 }
 
-void freetronicsLCDShield::shift (bool left) {
-    int tmp = 0;
-    
-    if (left) tmp = 0x04;
-    writeCommand(0x18 + tmp);
+void freetronicsLCDShield::shift(bool direction) {
+    if(direction == LEFT) shiftLeft();
+    else shiftRight();
+}
+
+void freetronicsLCDShield::shiftLeft(void) {
+    writeCommand(0x18 + 0x04);
+}
+
+void freetronicsLCDShield::shiftRight(void) {
+    writeCommand(0x18);
 }
 
 void freetronicsLCDShield::cls(void) {
@@ -73,6 +101,16 @@
     wait(0.00164f);
 }
 
+void freetronicsLCDShield::writeCGRAM (char address, const char *ptr, char nbytes) {
+    // Write the address only once, it is autoincremented 
+    writeCommand(0x40 | address);
+
+    // Write the data
+    for(int i = 0; i < nbytes; i++) {
+        writeData(*ptr++);
+    }
+}
+
 // Low level output functions
 void freetronicsLCDShield::writeByte (int byte) {
     // Split the byte in high and low nibble, write high nibble first