Ryoichi Tojo / Mbed 2 deprecated sosu

Solve prime numbers with flashing LEDs using ☆Board Orange.

Dependencies:   TextLCD mbed

Diff: main.cpp

Revision:
0:7efb0bdf86b0
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Aug 29 20:38:25 2011 +0000
@@ -0,0 +1,26 @@
+#include "mbed.h"
+#include "TextLCD.h"
+DigitalOut myled(LED1);
+TextLCD lcd(p24, p26, p27, p28, p29, p30, TextLCD::LCD16x2); // rs, e, d4-d7
+DigitalOut leds[] = {(LED1), (LED2),(LED3),(LED4)};
+
+int main() {
+    long i, j, k, ii = 0;
+
+    for( i=3; i <= 10002000; i += 2 ){
+        k = 1;
+        for(j = 3; j < i / 2; j +=2 ){
+            if(i % j == 0) {k= 0; break;}
+        }
+        if( k == 1 ){
+                lcd.printf("%8d", i);
+                leds[0] = ii % 2;
+                leds[1] = ii % 4 >> 1;
+                leds[2] = ii % 8 >> 2;
+                leds[3] = ii % 16 >> 3;
+                ii++;
+                if(i > 10000000) break;
+        }
+    }
+
+}