main.cpp

00001 #include "MicroBit.h"                                                                       //dem libraries tho.... don't forget 'em! (MCU specific)
00002 #include "PCA9955A.h"
00003 
00004 //Allows each led driver port to be triggered on/off over serial - simply send the relevant Hex character using Putty or similar: 
00005 //(0,1,2,3,4,5,6) = segments for character 1, 
00006 //(7,8,9,A,B,C,D) = segments for character 2, 
00007 //(E,F) = decimal points
00008 
00009 PCA9955A    led_cntlr(I2C_SDA0, I2C_SCL0 , 0x3f<<1);                                        //SDA, SCL, Slave_address(option)
00010 MicroBitSerial pc(USBTX, USBRX);
00011 
00012 void lightIt(int, int);                                                                     //function to turn on specific LEDs
00013 void cutItA ();                                                                             //function to turn off left hand LEDs
00014 void cutItB ();                                                                             //function to turn off right hand LEDs
00015 void cutItC ();                                                                             //function to turn off decimal point LEDs
00016 int state[16];
00017 
00018 int main()
00019 {                                                                                           //Set the operate enable pin low (it's inverted)
00020     led_cntlr.current( ALLPORTS, 1 );                                                       //Set all outputs to max current
00021 
00022 
00023     while(1){
00024         if (pc.readable()){                                                                 //If there's serial data available
00025             char sc = pc.getc();                                                            //Read it
00026             int s = (int)sc;
00027             if (s > 96)
00028                 s = s - 87;
00029             else if (s > 47)
00030                 s = s - 48;
00031             if (s < 16){
00032                 state[s] = !state[s];
00033                 int onoff = state[s];
00034                 lightIt(s,onoff);
00035             }
00036             else if (s == 33){
00037                 cutItA();
00038                 cutItB();
00039                 cutItC();
00040                 for(int i = 0; i < 16; i++)
00041                     state[i] = 0;
00042             }
00043             pc.printf("%d",s);
00044         }
00045     }
00046 }
00047 
00048 void lightIt (int led, int o){
00049     led_cntlr.pwm(led,o);
00050 }
00051 
00052 void cutItA () {                                                                            //When called display reset LEDs on left hand side
00053     for ( int i = 0; i < 7; i++ ){
00054         led_cntlr.pwm(i,0);
00055     }
00056 }
00057 
00058 void cutItB () {                                                                            //When called display reset LEDs on right hand side
00059     for ( int i = 7; i < 14; i++ ){
00060         led_cntlr.pwm(i,0);
00061     }
00062 }
00063 
00064 void cutItC () {                                                                            //When called display reset LEDs on right hand side
00065     for ( int i = 14; i < 16; i++ ){
00066         led_cntlr.pwm(i,0);
00067     }
00068 }