Diff: LcdScreen.h

Revision:

0:ac3682c7c208

Child:

1:e87727c8979d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LcdScreen.h	Mon Apr 23 08:56:58 2012 +0000
@@ -0,0 +1,78 @@
+#include "TextLCD.h"
+
+#define SCREEN_WIDTH    16
+#define SCREEN_HEIGHT   2
+#define CR  13
+#define LF  10
+
+TextLCD lcd(p24, p26, p27, p28, p29, p30); // rs, e, d4-d7
+
+class LcdScreen {
+protected:
+    unsigned char cram[SCREEN_HEIGHT][SCREEN_WIDTH];
+    int cursor_x;
+    int cursor_y;
+public:
+    LcdScreen()
+    {
+        cursor_x = 0;
+        cursor_y = 0;
+        
+        int x, y;
+        for ( y = 0; y < SCREEN_HEIGHT; y++ ) {
+            for ( x = 0; x < SCREEN_WIDTH; x++ ) {
+                cram[y][x] = ' ';
+            }
+        }
+        
+        syncScreen();
+    }
+    
+    void syncScreen()
+    {
+        int x, y;
+        
+        for ( y = 0; y < SCREEN_HEIGHT; y++ ) {
+            lcd.locate(0,y);
+            for ( x = 0; x < SCREEN_WIDTH; x++ ) {
+                lcd.putc(cram[y][x]);
+            }
+        }
+    }
+    
+    void scroll()
+    {
+        int x;
+        for ( x = 0; x < SCREEN_WIDTH; x++ ) {
+            cram[0][x] = cram[1][x];
+            cram[1][x] = ' ';
+        }
+    }
+    
+    void print(const unsigned char *data)
+    {
+        const unsigned char *p;
+        for ( p = data; *p != '\0'; p++ ) {
+            if ( *p == CR ) {
+                cursor_x = 0;
+            } else if ( *p == LF ) {
+                cursor_y++;
+            } else if ( 0x20 <= *p && *p <= 0x7f ) {
+                if ( cursor_x >= SCREEN_WIDTH ) {
+                    cursor_x = 0;
+                    cursor_y++;
+                }
+                if ( cursor_y >= SCREEN_HEIGHT ) {
+                    scroll();
+                    cursor_y = SCREEN_HEIGHT - 1;
+                }
+                cram[cursor_y][cursor_x++] = *p;
+            }
+        }
+        if ( cursor_x >= SCREEN_WIDTH ) {
+            cursor_x = 0;
+            ++cursor_y;
+        }
+        syncScreen();
+    }
+};
\ No newline at end of file