Aaron Huang / Mbed 2 deprecated WaveGen

Generate sine wave, using analog output

Dependencies:   mbed WaveGen

Dependents:   WaveGen

main.cpp@3:be30774cb93f, 2014-02-14 (annotated)

Committer:
aaronice
Date:
Fri Feb 14 08:00:07 2014 +0000
Revision:
3:be30774cb93f
Parent:
2:e723d10f745d
Child:
4:ec289b4b7758
bug fixed

Who changed what in which revision?

UserRevisionLine numberNew contents of line
aaronice 0:fc7729e19c10 1
aaronice 0:fc7729e19c10 2 #include "mbed.h"
aaronice 0:fc7729e19c10 3 AnalogOut DA(PTE30);
aaronice 1:6b531bf059e4 4 //AnalogIn AD(PTB1);
aaronice 0:fc7729e19c10 5
aaronice 0:fc7729e19c10 6 Serial pc(USBTX, USBRX); // tx, rx
aaronice 0:fc7729e19c10 7
aaronice 0:fc7729e19c10 8 float da;
aaronice 1:6b531bf059e4 9 float Amp = 1.0;
aaronice 0:fc7729e19c10 10 float w = 1.0;
aaronice 0:fc7729e19c10 11 float pi = 3.14159;
aaronice 3:be30774cb93f 12 float deltaT = 0.01;
aaronice 0:fc7729e19c10 13 void callback() {
aaronice 0:fc7729e19c10 14 // Note: you need to actually read from the serial to clear the RX interrupt
aaronice 0:fc7729e19c10 15 //int AA;
aaronice 0:fc7729e19c10 16 //int ww;
aaronice 0:fc7729e19c10 17 printf("%c\n", pc.getc());
aaronice 0:fc7729e19c10 18 wait(0.5);
aaronice 1:6b531bf059e4 19 pc.printf("Input parameter A(<1.0) and press Enter:\n");
aaronice 0:fc7729e19c10 20 pc.scanf("%f", &Amp);
aaronice 0:fc7729e19c10 21 pc.printf("%f\n", Amp);
aaronice 0:fc7729e19c10 22 //Amp = (float)AA;
aaronice 1:6b531bf059e4 23 pc.printf("Input parameter w and press Enter:\n");
aaronice 0:fc7729e19c10 24 pc.scanf("%f", &w);
aaronice 0:fc7729e19c10 25 pc.printf("%f\n", w);
aaronice 2:e723d10f745d 26 pc.printf("Continuing...\n");
aaronice 0:fc7729e19c10 27 //w = (float)ww;
aaronice 0:fc7729e19c10 28 }
aaronice 0:fc7729e19c10 29
aaronice 0:fc7729e19c10 30
aaronice 0:fc7729e19c10 31 int main(void) {
aaronice 0:fc7729e19c10 32
aaronice 0:fc7729e19c10 33
aaronice 0:fc7729e19c10 34 pc.attach(&callback);
aaronice 0:fc7729e19c10 35
aaronice 0:fc7729e19c10 36 while(1){
aaronice 1:6b531bf059e4 37 for (float i=0; i<(360); i++) {
aaronice 1:6b531bf059e4 38 da = Amp*(sin(w*i/(180)*pi)*0.5+0.5);
aaronice 0:fc7729e19c10 39 DA.write(da);
aaronice 2:e723d10f745d 40 wait(deltaT)
aaronice 2:e723d10f745d 41 pc.printf("%f ",da);
aaronice 0:fc7729e19c10 42
aaronice 1:6b531bf059e4 43 //Monitor Received Analog In
aaronice 1:6b531bf059e4 44 //pc.printf("%f ", AD.read());
aaronice 0:fc7729e19c10 45
aaronice 0:fc7729e19c10 46 }
aaronice 0:fc7729e19c10 47 //wait(3.0);
aaronice 0:fc7729e19c10 48 }
aaronice 0:fc7729e19c10 49 }