main.cpp

00001 #include "mbed.h"
00002 //#include "USBSerial.h"
00003 #include "mRotaryEncoder.h"
00004 
00005 /** Test the Library for mechanical rotary encoders with pushbutton 
00006  * like this one from alps  http://www.alps.com/WebObjects/catalog.woa/E/HTML/Encoder/Incremental/EC11/EC11E09244BS.shtml
00007  * should work for any other incremental encoder with button
00008  */
00009 
00010 // mbed LEDs
00011 DigitalOut led1(LED1);
00012 DigitalOut led2(LED2);
00013 DigitalOut led3(LED3);
00014 DigitalOut led4(LED4);
00015 
00016 //USBSerial pcout;
00017 static BufferedSerial pcout(USBTX, USBRX); // tx, rx
00018 
00019 
00020 //mRotaryEncoder(PinName pinA, PinName pinB, PinName pinSW, PinMode pullMode=PullUp, int debounceTime_us=1000)
00021 mRotaryEncoder  wheel(p16, p17, p18,PullUp,1500);
00022 
00023 
00024 int lastGet;
00025 int thisGet;
00026 
00027 
00028 bool enc_pressed = false;      // Button of rotaryencoder was pressed
00029 bool enc_rotated = false;      // rotary encoder was totaded left or right
00030 
00031 
00032 //interrup-Handler for button on rotary-encoder
00033 void trigger_sw() {
00034     enc_pressed = true;               // just set the flag, rest is done outside isr
00035 }
00036 
00037 //interrup-Handler for rotary-encoder rotation
00038 void trigger_rotated() {
00039     enc_rotated = true;               // just set the flag, rest is done outside isr
00040 }
00041 
00042 
00043 // display int-Value on the 4 LEDS
00044 void displayLED(int value) {
00045     switch (abs(value) % 4) { // Get 2 LSBs and display sequence on mbed LEDs
00046         case 0:
00047             led1 = 1;
00048             led2 = 0;
00049             led3 = 0;
00050             led4 = 0;
00051             break;
00052         case 1:
00053             led1 = 0;
00054             led2 = 1;
00055             led3 = 0;
00056             led4 = 0;
00057             break;
00058         case 2:
00059             led1 = 0;
00060             led2 = 0;
00061             led3 = 1;
00062             led4 = 0;
00063             break;
00064         default:
00065             led1 = 0;
00066             led2 = 0;
00067             led3 = 0;
00068             led4 = 1;
00069             break;
00070     } // switch
00071 }
00072 
00073 int main() {
00074 
00075     pcout.set_baud(115200);
00076     printf("\n\rconnected to mbed...\n\r");
00077 
00078     //Int-Handler
00079     // call trigger_sw() when button of rotary-encoder is pressed
00080     wheel.attachSW(&trigger_sw);
00081 
00082     // call trigger_rot() when the shaft is rotaded left or right
00083     wheel.attachROT(&trigger_rotated);
00084 
00085     lastGet = 0;
00086 
00087     // set encrotated, so position is displayed on startup
00088     enc_rotated = true;
00089 
00090     while (1) {
00091 
00092 
00093         // shaft has been rotated?
00094         if (enc_rotated) {
00095             enc_rotated = false;
00096 
00097             thisGet = wheel.Get();
00098 
00099             displayLED(thisGet);
00100             printf ("Pulses is: %i\n\r", thisGet);
00101 
00102         }
00103 
00104 
00105         // Button pressed?
00106         if (enc_pressed) {
00107             enc_pressed = false;
00108             printf("triggered!\n\r");
00109 
00110             wheel.Set(0);
00111 
00112             //Update displays
00113             thisGet = wheel.Get();
00114             displayLED(thisGet);
00115             printf ("\n\rPulses is: %i\n\r", thisGet);
00116 
00117         }
00118         //do something else
00119         
00120     }
00121 
00122 }