Revision 5:f2820d1efc08, committed 2017-04-10

Comitter:

maclobdell

Date:

Mon Apr 10 14:43:42 2017 +0000

Parent:

4:8641e4da6744

Commit message:

wait to display (send data) until frame buffer written. speeds performance significantly. Also added function to show text without scroll

Changed in this revision

--- a/main.cpp	Sat Apr 08 02:57:54 2017 +0000
+++ b/main.cpp	Mon Apr 10 14:43:42 2017 +0000
@@ -18,6 +18,8 @@
 Adafruit_16x8matrix matrix2 = Adafruit_16x8matrix(&i2c); 
 
 void scrollText(char * buffer, uint8_t buf_len, uint8_t speed);
+void showText(char * buffer, uint8_t buf_len, uint8_t duration);
+
 void myidlethread(void);
 
 int main() {
@@ -36,11 +38,18 @@
         matrix.writeDisplay();
         
         char buffer [50];
+
+        sprintf(buffer, "This\0");
+        showText(buffer,strlen(buffer), 1);
+        sprintf(buffer, "is\0");
+        showText(buffer,strlen(buffer), 1);
+        sprintf(buffer, "the\0");
+        showText(buffer,strlen(buffer), 1);        
         sprintf (buffer, "IoT Lab\0");
-
+        
     while(1)
     {
-        scrollText(buffer,strlen(buffer), 1000);
+        scrollText(buffer,strlen(buffer), 100);
         
         Thread::attach_idle_hook (myidlethread);
           
@@ -67,18 +76,33 @@
          for(int j=0; j<buf_len; j++){ /*loop over all of the chars in the text*/
             if(xoff > 15){
                 matrix2.drawChar(xoff + j*6 - 16, 0, buffer[j], 1, 0, 1);
-                matrix2.writeDisplay();
+
             }else
             {
                 matrix.drawChar(xoff + j*6, 0, buffer[j], 1, 0, 1);
-                matrix.writeDisplay();
                 matrix2.drawChar(xoff + j*6 - 16, 0, buffer[j], 1, 0, 1);
-                matrix2.writeDisplay();
             }    
         }
         xoff--; /* decrement x offset*/
-        Thread::wait(1000/speed);
+        matrix.writeDisplay();
+        matrix2.writeDisplay();
+        Thread::wait(2000/speed);
         matrix.clear();
         matrix2.clear();
     }    
 }    
+
+
+void showText(char * buffer, uint8_t buf_len, uint8_t duration)
+{
+     for(int j=0; j<buf_len; j++){ /*loop over all of the chars in the text*/
+        matrix.drawChar(j*6, 0, buffer[j], 1, 0, 1);
+        matrix2.drawChar(j*6 - 16, 0, buffer[j], 1, 0, 1);
+    }
+    matrix.writeDisplay();
+    matrix2.writeDisplay();
+    Thread::wait(1000*duration);
+    matrix.clear();
+    matrix2.clear();
+ 
+}   
\ No newline at end of file