Diff: main.cpp

Revision:

1:dd1d1b64b9a5

Parent:

0:2eec8a9428ea

Child:

2:ffe5cf2557e3

--- a/main.cpp	Thu Dec 15 17:43:32 2016 +0000
+++ b/main.cpp	Wed Dec 21 18:25:03 2016 +0000
@@ -3,19 +3,94 @@
 #include "Adafruit_GFX.h"
  
 I2C i2c(D14, D15);
- 
+
+//mpl - something with stdio screwing things up.  need to define serial port to use for debug
+Serial pc (USBTX,USBRX);
+
 Adafruit_16x8matrix matrix = Adafruit_16x8matrix(&i2c);
- 
+Adafruit_16x8matrix matrix2 = Adafruit_16x8matrix(&i2c); 
+
+void scrollText(char * buffer, uint8_t buf_len);
+
 int main() {
-    matrix.begin(0x70);
-    while(1) {
-        matrix.clear();
+
+/*    matrix[0].begin(0x70);
+    //while(1) 
+//    {
+        matrix[0].clear();
         for (int i = 0; i < 16; i++) {
-          for (int j = 0; j < 16; j++) {
+          for (int j = 0; j < 8; j++) {
               matrix.drawPixel(i, j, LED_ON);  
               matrix.writeDisplay();  // write the changes we just made to the display
-              Thread::wait(100);
+              Thread::wait(10);
+          }
+        }
+
+        matrix2.begin(0x71);
+        matrix2.clear();
+
+        for (int i = 0; i < 16; i++) {
+          for (int j = 0; j < 8; j++) {
+              matrix2.drawPixel(i, j, LED_ON);  
+              matrix2.writeDisplay();  // write the changes we just made to the display
+              Thread::wait(10);
           }
         }
+        
+*/
+        matrix2.begin(0x71);
+        matrix2.clear();
+        matrix2.writeDisplay();
+//        matrix2.writeChar('A');
+//       matrix2.writeDisplay();
+//        Thread::wait(10);
+
+        matrix.begin(0x70);
+        matrix.clear();
+        matrix.writeDisplay();
+//        matrix.writeChar('A');
+//        matrix.writeChar('B');
+//        matrix.writeChar('C');                
+//        matrix.writeDisplay();
+        
+         char buffer [50];
+         sprintf (buffer, "Hello\0");
+        scrollText(buffer,strlen(buffer));
+
+//    }
+}
+
+void scrollText(char * buffer, uint8_t buf_len)
+{
+    uint8_t x_pos;
+    uint8_t m;
+    char c;
+    
+    //pc.printf("buffer = %s, len = %d\r\n", buffer, buf_len);
+
+    //Need to start at the end and draw backwards, each time scrolling one pixel to the right
+    // then, stop when get to first character.      
+    //find example
+    
+    /* code inspired by LOLShield library */
+    int xoff=31;/* set offset to the right end of the screen*/
+    for(int i=0; i<buf_len*5 +52; i++){ /*scrolling loop*/
+        for(int j=0; j<buf_len; j++){ /*loop over all of the chars in the text*/
+            if(xoff + j*6 <32)
+            {
+                matrix.drawChar(xoff + j*6, 0, buffer[j], 1, 0, 1);
+                matrix.writeDisplay();
+            }else
+            {
+                matrix2.drawChar(xoff + j*6-32, 0, buffer[j], 1, 0, 1);
+                matrix2.writeDisplay();
+            }    
+        }
+        xoff--; /* decrement x offset*/
+        Thread::wait(70);
+        matrix.clear();
+        matrix2.clear();
     }
-}
\ No newline at end of file
+
+    
+}