Natalia Govor / Mbed OS lab1-5

Working with multiple threads. Control of the speed of LED flashing using keyboard.

Fork of rtos_basic by mbed_example

main.cpp@12:2952e72a8be9, 2018-01-18 (annotated)

Committer:
natgovor
Date:
Thu Jan 18 16:58:02 2018 +0000
Revision:
12:2952e72a8be9
Parent:
10:dc33cd3f4eb9 
Implemented control of LED flashing speed by user keyboard.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 1:491820ee784d 1 #include "mbed.h"
emilmont 1:491820ee784d 2
emilmont 1:491820ee784d 3 DigitalOut led1(LED1);
natgovor 12:2952e72a8be9 4
natgovor 12:2952e72a8be9 5 Serial pc(USBTX, USBRX); // tx, rx
natgovor 12:2952e72a8be9 6
geky 7:8d9919175929 7 Thread thread;
natgovor 12:2952e72a8be9 8
natgovor 12:2952e72a8be9 9 void led1_thread(int *speed) {
emilmont 1:491820ee784d 10 while (true) {
natgovor 12:2952e72a8be9 11 led1 = !led1;
natgovor 12:2952e72a8be9 12 Thread::wait(*speed);
emilmont 1:491820ee784d 13 }
emilmont 1:491820ee784d 14 }
emilmont 1:491820ee784d 15
emilmont 1:491820ee784d 16 int main() {
natgovor 12:2952e72a8be9 17 int speed = 200;
natgovor 12:2952e72a8be9 18 thread.start(callback(led1_thread, &speed));
emilmont 1:491820ee784d 19
natgovor 12:2952e72a8be9 20 char userInput;
natgovor 12:2952e72a8be9 21 pc.printf("Enter a character>");
natgovor 12:2952e72a8be9 22 while(1) {
natgovor 12:2952e72a8be9 23 userInput = pc.getc();
natgovor 12:2952e72a8be9 24 switch(userInput) {
natgovor 12:2952e72a8be9 25 case 'f':
natgovor 12:2952e72a8be9 26 pc.printf("faster");
natgovor 12:2952e72a8be9 27 speed = speed - 50;
natgovor 12:2952e72a8be9 28 break;
natgovor 12:2952e72a8be9 29 case 's':
natgovor 12:2952e72a8be9 30 pc.printf("slower");
natgovor 12:2952e72a8be9 31 speed = speed + 50;
natgovor 12:2952e72a8be9 32 break;
natgovor 12:2952e72a8be9 33 }
natgovor 12:2952e72a8be9 34
natgovor 12:2952e72a8be9 35 thread.start(callback(led1_thread, &speed));
natgovor 12:2952e72a8be9 36 Thread::wait(500);
emilmont 1:491820ee784d 37 }
emilmont 1:491820ee784d 38 }