main.cpp

00001 #include "mbed.h"
00002 
00003 DigitalIn enc_pb (p5);
00004 InterruptIn enc_A (p6);
00005 InterruptIn enc_B (p7);
00006 PwmOut led1 (p22);
00007 PwmOut led2 (p23);
00008 
00009 void enc_int_routine (void);
00010 
00011 bool enc_A_state;
00012 bool enc_B_state;
00013 bool old_enc_A_state;
00014 bool old_enc_B_state;
00015 int val_min = 0;
00016 int val_max = 100;
00017 int val = ((val_max - val_min) / 2) + val_min;
00018 int val_old = val;
00019 
00020 int main() {
00021     enc_pb.mode(PullUp);
00022     enc_A.mode(PullUp);
00023     enc_B.mode(PullUp);
00024     enc_A_state = enc_A;
00025     enc_B_state = enc_B;
00026     enc_A.rise(&enc_int_routine);
00027     enc_B.rise(&enc_int_routine);
00028     enc_A.fall(&enc_int_routine);
00029     enc_B.fall(&enc_int_routine);
00030     while (1) {
00031         if (val != val_old) {
00032             printf("\n\r%i",val);
00033         } // if (val != val_old)
00034         val_old = val;
00035         if (enc_pb) {
00036             led1 = val / 100.0;
00037             led2 = 1.0 - (val / 100.0);
00038         } else {
00039             printf("button\n\r");
00040             led1 = 0;
00041             led2 = 0;
00042         } // if (enc_pb)
00043     } // while(1)
00044 } // end main
00045 
00046 void enc_int_routine (void) {
00047     old_enc_A_state = enc_A_state;
00048     old_enc_B_state = enc_B_state;
00049     enc_A_state = enc_A;
00050     enc_B_state = enc_B;
00051     if (((enc_A_state != old_enc_A_state) && (enc_B_state != old_enc_B_state)) || ((enc_A_state == old_enc_A_state) && (enc_B_state == old_enc_B_state))) {
00052         val = val;
00053     } else {
00054         if (enc_A_state ^ old_enc_B_state) {
00055             val -= 1;
00056         } else {
00057             val += 1;
00058         } // (enc_A_state ^ old_enc_B_state)
00059     } // if ((enc_A_state != old_enc_A_state) && (enc_B_state != old_enc_B_state))
00060 } // end enc_A_int_routine