Natasha Sarkar
/
m119_a2_p4
ECEM119 assignment 2 problem 4
Diff: main.cpp
- Revision:
- 1:eee108fd0b4b
- Parent:
- 0:44f80f935e35
--- a/main.cpp Wed Apr 17 21:40:16 2019 +0000 +++ b/main.cpp Fri Apr 19 20:03:25 2019 +0000 @@ -5,20 +5,28 @@ #include "mbed.h" #include "stats_report.h" -// -PwmOut output(PTA10); +#include <stdio.h> +#include <string.h> +#include <stdlib.h> + +DigitalOut output(PTA10); DigitalIn input(PTD9); Timer timer1; Timer timer2; +Timer timer_pwm; Serial pc(USBTX, USBRX); //create a Serial object int main() { - int period_ms = 500; - output.period_ms(period_ms); - output.write(0.5); + pc.baud(115200); + int period = 50000; + float duty_cycle = 0.5; + + output.write(0); + timer1.start(); timer2.start(); + timer_pwm.start(); int prev = 0; int count = 0; @@ -27,7 +35,46 @@ int time_on = 0; while(1) { - pc.baud(115200); + //pc.printf("beginning of loop\n"); + int time_on_output = duty_cycle * period; + int curr_time = timer_pwm.read_us(); + //pc.printf("%i %i\n", time_on, curr_time); + if (curr_time > period) { + output.write(1); + timer_pwm.reset(); + //pc.printf("outputting 1\n"); + } else if (curr_time > time_on_output) { + output.write(0); + //pc.printf("outputting 0\n"); + } + + char buffer1[20]; + char buffer2[20]; + if (pc.readable()) { + memset(buffer1, 0, 20*sizeof(char)); + memset(buffer2, 0, 20*sizeof(char)); + pc.scanf("%s", &buffer1); + pc.scanf("%s", &buffer2); + +// pc.printf("%s ", buffer1); +// pc.printf("%s\n", buffer2); + + int input_per_i = atoi(buffer1); + float input_duty_f = atof(buffer2); + +// pc.printf("%i ", input_per_i); +// pc.printf("%f ", input_duty_f); + + if (input_per_i < 1000 || input_per_i > 60000 || input_duty_f < 0 || input_duty_f > 1) { + pc.printf("mbed> ERROR\n"); + } else { + period = input_per_i; + duty_cycle = input_duty_f; +// output.period_us(atoi(input_per)); +// output.write(atof(input_duty)); + } + } + int curr = input.read(); if (curr) { if (prev == 0) { @@ -35,7 +82,7 @@ if (count == 0) { t = timer1.read_us(); d = float(time_on) / t; - pc.printf("mbed> %i, %f\n", t, d); + pc.printf("mbed> %i, %.3f\n", t, d); } count = (count + 1) % 10; timer1.reset();