Craig Evans / N5110

Library for interfacing to Nokia 5110 LCD display (as found on the SparkFun website).

Dependents:   LV7_LCDtest LV7_Grupa5_Tim003_Zadatak1 lv7_Grupa5_Tim008_zad1 LV7_PAI_Grupa5_tim10_Zadatak1 ... more

This library is designed to make it easy to interface an mbed with a Nokia 5110 LCD display.

These can be found at Sparkfun (https://www.sparkfun.com/products/10168) and Adafruit (http://www.adafruit.com/product/338).

The library uses the SPI peripheral on the mbed which means it is much faster sending data to the display than other libraries available on other platforms that use software SPI.

The library can print strings as well as controlling individual pixels, meaning that both text and primitive graphics can be displayed.

Diff: N5110.cpp

Revision:
18:1af393359298
Parent:
17:780a542d5f8b
Child:
19:ba8addc061ea
--- a/N5110.cpp	Tue Mar 17 12:56:03 2015 +0000
+++ b/N5110.cpp	Wed Apr 22 12:41:45 2015 +0000
@@ -220,33 +220,46 @@
 // function to print 5x7 font
 void N5110::printChar(char c,int x,int y)
 {
-    for (int i = 0; i < 5 ; i++ ) {
-        buffer[x+i][y] = font5x7[(c - 32)*5 + i];
-        // array is offset by 32 relative to ASCII, each character is 5 pixels wide
+    if (y>=0 && y<6) {  // check if printing in range of y banks
+
+        for (int i = 0; i < 5 ; i++ ) {
+            int pixel_x = x+i;
+            if (pixel_x > 83)  // ensure pixel isn't outside the buffer size (0 - 83)
+                break;
+            buffer[pixel_x][y] = font5x7[(c - 32)*5 + i];
+            // array is offset by 32 relative to ASCII, each character is 5 pixels wide
+        }
+
+        refresh();  // this sends the buffer to the display and sets address (cursor) back to 0,0
     }
-
-    refresh();  // this sends the buffer to the display and sets address (cursor) back to 0,0
 }
 
 // function to print string at specified position
 void N5110::printString(const char * str,int x,int y)
 {
-    int n = 0 ; // counter for number of characters in string
-    // loop through string and print character
-    while(*str) {
+    if (y>=0 && y<6) {  // check if printing in range of y banks
+
+        int n = 0 ; // counter for number of characters in string
+        // loop through string and print character
+        while(*str) {
 
-        // writes the character bitmap data to the buffer, so that
-        // text and pixels can be displayed at the same time
-        for (int i = 0; i < 5 ; i++ ) {
-            buffer[x+i+n*6][y] = font5x7[(*str - 32)*5 + i];
+            // writes the character bitmap data to the buffer, so that
+            // text and pixels can be displayed at the same time
+            for (int i = 0; i < 5 ; i++ ) {
+                int pixel_x = x+i+n*6;
+                if (pixel_x > 83) // ensure pixel isn't outside the buffer size (0 - 83)
+                    break;
+                buffer[pixel_x][y] = font5x7[(*str - 32)*5 + i];
+            }
+
+            str++;  // go to next character in string
+
+            n++;    // increment index
+
         }
 
-        str++;  // go to next character in string
-        n++;    // increment index
+        refresh();  // this sends the buffer to the display and sets address (cursor) back to 0,0
     }
-
-    refresh();  // this sends the buffer to the display and sets address (cursor) back to 0,0
-
 }
 
 // function to clear the screen