ESE519 / Mbed 2 deprecated Lab2_part1

part1

Dependencies:   mbed

main.cpp@8:8991b0b82440, 2015-02-22 (annotated)

Committer:
jaredwil
Date:
Sun Feb 22 17:54:07 2015 +0000
Revision:
8:8991b0b82440
Parent:
7:89a6d9004710
Child:
9:58c1acf33117
c;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jaredwil 0:2c98a4766d9f 1 #include "mbed.h"
jaredwil 2:255d7e71c69b 2 //Right now this is only working for inputs length 3
jaredwil 0:2c98a4766d9f 3
jaredwil 0:2c98a4766d9f 4 //Initialize PWM
jaredwil 0:2c98a4766d9f 5 PwmOut PWM1(p21);
jaredwil 0:2c98a4766d9f 6 Serial pc(USBTX, USBRX);
jaredwil 1:93eb2c653c86 7 Timer t1;
jaredwil 0:2c98a4766d9f 8
jaredwil 0:2c98a4766d9f 9
jaredwil 7:89a6d9004710 10 //Initialize Input buffer
jaredwil 2:255d7e71c69b 11 char input[10];
jaredwil 1:93eb2c653c86 12
jaredwil 1:93eb2c653c86 13
jaredwil 1:93eb2c653c86 14 int main()
jaredwil 0:2c98a4766d9f 15 {
jaredwil 2:255d7e71c69b 16 //define input variables
jaredwil 1:93eb2c653c86 17 float freq;
jaredwil 1:93eb2c653c86 18 int dur;
jaredwil 2:255d7e71c69b 19 //Check if input is valid
jaredwil 1:93eb2c653c86 20 int isint;
jaredwil 0:2c98a4766d9f 21 while(1){
jaredwil 1:93eb2c653c86 22
jaredwil 1:93eb2c653c86 23 //wait for a valid input
jaredwil 1:93eb2c653c86 24 while(isint != 2)
jaredwil 1:93eb2c653c86 25 {
jaredwil 1:93eb2c653c86 26 //Input Desired Tone
jaredwil 1:93eb2c653c86 27 printf("Input Desired Tone: Frequency (Hz) Duration (ms) followed by enter\r");
jaredwil 4:34df824930f6 28 char c = pc.getc();
jaredwil 4:34df824930f6 29 int i =0;
jaredwil 7:89a6d9004710 30
jaredwil 7:89a6d9004710 31 //wait for return to be pressed
jaredwil 4:34df824930f6 32 while(c != '\r') {
jaredwil 7:89a6d9004710 33 printf("%c",c); //echo
jaredwil 7:89a6d9004710 34 input[i++]=c; //add current char to buffer
psahay 3:664e38d7ae34 35 c = pc.getc();
psahay 3:664e38d7ae34 36 }
jaredwil 7:89a6d9004710 37 input[i] = '\0'; //end buffer
jaredwil 2:255d7e71c69b 38 isint = sscanf(input, "%f %d",&freq,&dur); //assign input variables
jaredwil 4:34df824930f6 39
jaredwil 5:cb200e69a544 40 //printf("isint = %d\r",isint); //debug check if input is correct
jaredwil 2:255d7e71c69b 41 //if input is incorrect this will be displayed
jaredwil 1:93eb2c653c86 42 if(isint!= 2)
jaredwil 1:93eb2c653c86 43 printf("You did not enter a number.Please enter an argument's number\r");
jaredwil 1:93eb2c653c86 44
jaredwil 1:93eb2c653c86 45 }
jaredwil 1:93eb2c653c86 46
jaredwil 7:89a6d9004710 47
jaredwil 7:89a6d9004710 48 //wait for another enter to output the tone
jaredwil 1:93eb2c653c86 49 if(pc.readable()) {
jaredwil 2:255d7e71c69b 50 //if enter is pressed continue to output tone
jaredwil 1:93eb2c653c86 51 if(pc.getc() == '\r')
jaredwil 1:93eb2c653c86 52 {
jaredwil 2:255d7e71c69b 53 //show user what value was input
jaredwil 1:93eb2c653c86 54 printf("Valid Input Frequency = %3.0f, Duration = %d\r", freq, dur);
jaredwil 1:93eb2c653c86 55 isint = 0; //reset input
jaredwil 1:93eb2c653c86 56
jaredwil 2:255d7e71c69b 57 //Play tone with correct freq and durration
jaredwil 2:255d7e71c69b 58 //Timer used for duration
jaredwil 1:93eb2c653c86 59 t1.reset();
jaredwil 1:93eb2c653c86 60 t1.start();
jaredwil 6:ab02d7bb40cb 61 PWM1.period(1/freq); // set PWM period to user specified
jaredwil 1:93eb2c653c86 62 PWM1=0.5; // set duty cycle to 50%
jaredwil 1:93eb2c653c86 63 while(t1.read_ms() < dur){
jaredwil 1:93eb2c653c86 64 //WAIT
jaredwil 0:2c98a4766d9f 65 }
jaredwil 1:93eb2c653c86 66 PWM1=0.0; //turn off
jaredwil 1:93eb2c653c86 67 t1.stop();
jaredwil 1:93eb2c653c86 68
jaredwil 1:93eb2c653c86 69 }
jaredwil 7:89a6d9004710 70
jaredwil 7:89a6d9004710 71 //if another button is pressed besides enter abort and start over
jaredwil 1:93eb2c653c86 72 else{
jaredwil 1:93eb2c653c86 73 printf("You didn't press enter you idiot\r");
jaredwil 1:93eb2c653c86 74 isint = 0;
jaredwil 1:93eb2c653c86 75 }
jaredwil 1:93eb2c653c86 76 }
jaredwil 1:93eb2c653c86 77 }
jaredwil 1:93eb2c653c86 78
jaredwil 1:93eb2c653c86 79 }