Diff: main.cpp

Revision:

0:5438c56c3e4c

Child:

1:fecc093f43d4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Nov 28 16:46:58 2012 +0000
@@ -0,0 +1,71 @@
+// Simple scrolling message display for mbed and HT1632C based LED matrix displays
+
+#include "mbed.h"
+#include <HT1632_LedMatrix.h>
+
+Serial pc(USBTX, USBRX); // tx, rx
+
+// Define the onboard LEDs to use as status indicators
+DigitalOut led1(LED1);      // Activity
+DigitalOut led2(LED2);      // Activity, alternates with led2
+
+// create object to control the LED Matrix
+HT1632_LedMatrix led = HT1632_LedMatrix();
+
+#define DISPDELAY 90
+
+// Define the message, add blanks to front so it doesnt lose first part immediately
+char* msg = "    The quick brown fox jumped over the lazy dog!!!";
+int crtPos = 0;
+int msgx = 1;    // position on message screen of current character, set to 1 to allow for first scroll
+
+/*
+* This works for multiple 8x32 matrix.
+*/
+void displayScrollingLine( void const* )
+{
+    int y,xmax,ymax;
+    led.getXYMax(&xmax,&ymax);
+    while(true) {
+        // shift the whole screen 6 times, one column at a time;
+        for (int x=0; x < 6; x++) {
+            led.scrollLeft(1,0);
+            msgx--;
+            // fit as much as we can on display
+            while (!led.putChar(msgx,0,msg[crtPos])) { // zero return if it all fitted on display
+                led.getXY(&msgx,&y);
+                crtPos++; // we got all of the character on!!
+                if (crtPos >= strlen(msg)) {
+                    crtPos = 0;
+                }
+            }
+            led.putShadowRam();
+            Thread::wait(DISPDELAY);
+        }
+    }
+}
+
+
+int main()
+{
+    // Define how many displays we have, older 0832 allowed vertical stacking
+    // newer ones dont unless you want a gap between the displays.
+    // Num horizontal displays 1 to 4, num vertical displays 1 to 4. Max 4 displays can be used.
+    // Usable combinations are 1,1; 2,1; 3,1; 4,1; and 2,2; 1,2; 1,3; 1,4; with gaps!!
+    led.init(1,1);
+    pc.baud(9600);
+    printf("LED Matrix dislay test");
+    led.clear();
+    led.setBrightness(8);
+
+    Thread displayTask(displayScrollingLine, NULL, osPriorityNormal, 1024 * 4);
+
+    // Show we are still working by alternatively flashing LED1 and LED2, once a second
+    led1 = 0;       // Working
+    led2 = 1;       // Alternate with led1
+    while(1) {
+        led1=!led1;
+        led2=!led2;
+        Thread::wait(1000);
+    }
+}