main.cpp

00001 /*
00002   For Loop Iteration
00003  
00004  Demonstrates the use of a for() loop. 
00005  Lights multiple LEDs in sequence, then in reverse.
00006  
00007  The circuit:
00008  * LEDs from pins 2 through 11 to ground
00009  
00010  created 2006
00011  by David A. Mellis
00012  modified 30 Aug 2011
00013  by Tom Igoe 
00014 
00015  modified for Nucleo / mbed 12 Aug 2017
00016  by Sheila Ross
00017 
00018 This example code is in the public domain.
00019  
00020  http://www.arduino.cc/en/Tutorial/ForLoop
00021  */
00022 
00023 #include "mbed.h"
00024 
00025 float timer = 0.1;           // The higher the number, the slower the timing.
00026 
00027 BusOut bar_graph(D2,D3,D4,D5,D6,D7,D8,D9,D10,D11);
00028 
00029 int main() {
00030   
00031     while(1) {  // keep the lights going forever
00032 
00033         // light will shift from 0 places to 9 places
00034 
00035         for(int lights=1; lights<=(1<<9); lights=(lights<<1)) {
00036 
00037             bar_graph = lights;
00038 
00039             wait(timer);
00040         }
00041 
00042         // now do the same in reverse
00043 
00044         for(int lights=(1<<9); lights>=1; lights=(lights>>1)) {
00045 
00046             bar_graph = lights;
00047 
00048             wait(timer);
00049         }
00050 
00051     }
00052 
00053 
00054   
00055 }