Martijn Grootens / Mbed 2 deprecated mbr_2016_hw_1_ex_8

Demo code minor BioRobotics 2016 University of Twente, Enschede, NL Homework set 1, Exercise 8, Example solution

Dependencies:   mbed

main.cpp@0:cdb3d484a242, 2016-09-08 (annotated)

Committer:
megrootens
Date:
Thu Sep 08 14:15:15 2016 +0000
Revision:
0:cdb3d484a242
working answer

Who changed what in which revision?

UserRevisionLine numberNew contents of line
megrootens 0:cdb3d484a242 1 /**
megrootens 0:cdb3d484a242 2 * Minor BioRobotics 2016
megrootens 0:cdb3d484a242 3 *
megrootens 0:cdb3d484a242 4 * Programming Homework Set 1
megrootens 0:cdb3d484a242 5 * Exercise 8, example solution
megrootens 0:cdb3d484a242 6 *
megrootens 0:cdb3d484a242 7 * M.E. Grootens [at] utwente.nl,
megrootens 0:cdb3d484a242 8 * v0.1, 08.09.2016
megrootens 0:cdb3d484a242 9 */
megrootens 0:cdb3d484a242 10
megrootens 0:cdb3d484a242 11 #include "mbed.h"
megrootens 0:cdb3d484a242 12
megrootens 0:cdb3d484a242 13 #define SERIAL_BAUD 115200 // baud rate for serial communication
megrootens 0:cdb3d484a242 14
megrootens 0:cdb3d484a242 15 // Serial communication with PC
megrootens 0:cdb3d484a242 16 Serial pc(USBTX,USBRX);
megrootens 0:cdb3d484a242 17
megrootens 0:cdb3d484a242 18 // The LED that is to flash
megrootens 0:cdb3d484a242 19 DigitalOut led(LED_RED);
megrootens 0:cdb3d484a242 20
megrootens 0:cdb3d484a242 21 // Number of times to flash; global and volatile, 'cause modified by interrupt
megrootens 0:cdb3d484a242 22 volatile int n_times = 0;
megrootens 0:cdb3d484a242 23
megrootens 0:cdb3d484a242 24 /**
megrootens 0:cdb3d484a242 25 * Flash the LED
megrootens 0:cdb3d484a242 26 * @ensure n_times is increased and then the LED flashes n_times
megrootens 0:cdb3d484a242 27 */
megrootens 0:cdb3d484a242 28 void FlashLed()
megrootens 0:cdb3d484a242 29 {
megrootens 0:cdb3d484a242 30 n_times++;
megrootens 0:cdb3d484a242 31
megrootens 0:cdb3d484a242 32 pc.printf("\r\nFlashing %d times:\r\n",n_times);
megrootens 0:cdb3d484a242 33
megrootens 0:cdb3d484a242 34 for (int i=0; i<n_times; i++) {
megrootens 0:cdb3d484a242 35 pc.printf("[%d]",i);
megrootens 0:cdb3d484a242 36
megrootens 0:cdb3d484a242 37 led.write(0); // on
megrootens 0:cdb3d484a242 38 wait(0.1f); // wait 0.1 s
megrootens 0:cdb3d484a242 39 led.write(1); // off
megrootens 0:cdb3d484a242 40 wait(0.4f); // wait 0.4 s
megrootens 0:cdb3d484a242 41 }
megrootens 0:cdb3d484a242 42 }
megrootens 0:cdb3d484a242 43
megrootens 0:cdb3d484a242 44
megrootens 0:cdb3d484a242 45 /**
megrootens 0:cdb3d484a242 46 * Main function.
megrootens 0:cdb3d484a242 47 */
megrootens 0:cdb3d484a242 48 int main()
megrootens 0:cdb3d484a242 49 {
megrootens 0:cdb3d484a242 50 // Serial communication
megrootens 0:cdb3d484a242 51 pc.baud(SERIAL_BAUD);
megrootens 0:cdb3d484a242 52 pc.printf("\r\n**BOARD RESET**\r\n");
megrootens 0:cdb3d484a242 53
megrootens 0:cdb3d484a242 54 // LED off
megrootens 0:cdb3d484a242 55 led.write(1);
megrootens 0:cdb3d484a242 56
megrootens 0:cdb3d484a242 57 // Interrupt; call FlashLed when button pressed
megrootens 0:cdb3d484a242 58 InterruptIn sw2(SW2);
megrootens 0:cdb3d484a242 59 sw2.fall(&FlashLed);
megrootens 0:cdb3d484a242 60
megrootens 0:cdb3d484a242 61 // Infinite loop; does nothing but needs to prevent termination
megrootens 0:cdb3d484a242 62 while (true);
megrootens 0:cdb3d484a242 63 }