Severin Kiefer / Mbed OS PM2_Example_IRSensor

Workshop 1

Dependencies:   PM2_Libary

main.cpp@14:db46f47b0480, 2021-04-06 (annotated)

Committer:
pmic
Date:
Tue Apr 06 12:20:31 2021 +0000
Revision:
14:db46f47b0480
Parent:
13:5d689f89d794
Child:
15:a2c188ed294f
Autoalign the solution.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
boro 0:5d4d21d56334 1 #include "mbed.h"
boro 0:5d4d21d56334 2 #include "platform/mbed_thread.h"
pmic 13:5d689f89d794 3
pmic 3:aa1d854807fe 4 using namespace std::chrono;
pmic 13:5d689f89d794 5
pmic 13:5d689f89d794 6 InterruptIn user_button(USER_BUTTON);
pmic 13:5d689f89d794 7 DigitalOut led(LED1);
pmic 13:5d689f89d794 8
pmic 13:5d689f89d794 9 bool executeMainTask = false;
pmic 13:5d689f89d794 10 Timer user_button_timer, loop_timer;
pmic 13:5d689f89d794 11 int Ts_ms = 50;
pmic 5:887081decd5c 12
pmic 13:5d689f89d794 13 /* declaration of custom button functions */
pmic 13:5d689f89d794 14 void button_fall();
pmic 13:5d689f89d794 15 void button_rise();
pmic 11:cfc9b8e963db 16
pmic 13:5d689f89d794 17 /* create analog input object */
pmic 13:5d689f89d794 18 AnalogIn analogIn(PA_0);
pmic 13:5d689f89d794 19 float dist = 0.0f;
pmic 13:5d689f89d794 20
boro 0:5d4d21d56334 21 int main()
boro 0:5d4d21d56334 22 {
pmic 1:4e0e4d0363d9 23 user_button.fall(&button_fall);
pmic 1:4e0e4d0363d9 24 user_button.rise(&button_rise);
pmic 6:6c1c38d4faa4 25 loop_timer.start();
pmic 13:5d689f89d794 26
boro 0:5d4d21d56334 27 while (true) {
pmic 13:5d689f89d794 28
pmic 6:6c1c38d4faa4 29 loop_timer.reset();
pmic 13:5d689f89d794 30
pmic 13:5d689f89d794 31 /* ------------- start hacking ------------- -------------*/
pmic 13:5d689f89d794 32
pmic 13:5d689f89d794 33 if (executeMainTask) {
pmic 13:5d689f89d794 34
pmic 13:5d689f89d794 35 /* read analog input */
pmic 13:5d689f89d794 36 dist = analogIn.read()*3.3f;
pmic 14:db46f47b0480 37
pmic 13:5d689f89d794 38 /* do only output what's really necessary, outputting "Measured value in mV: "" within the loop is no good solution */
pmic 13:5d689f89d794 39 printf("Measured value in mV: %d\r\n", (static_cast<int>(dist * 1e3)));
pmic 11:cfc9b8e963db 40
pmic 6:6c1c38d4faa4 41 /* visual feedback that the main task is executed */
pmic 6:6c1c38d4faa4 42 led = !led;
pmic 13:5d689f89d794 43
boro 0:5d4d21d56334 44 } else {
pmic 6:6c1c38d4faa4 45 led = 0;
boro 0:5d4d21d56334 46 }
pmic 13:5d689f89d794 47
pmic 1:4e0e4d0363d9 48 /* ------------- stop hacking ------------- -------------*/
pmic 13:5d689f89d794 49
pmic 6:6c1c38d4faa4 50 int T_loop_ms = duration_cast<milliseconds>(loop_timer.elapsed_time()).count();
pmic 6:6c1c38d4faa4 51 int dT_loop_ms = Ts_ms - T_loop_ms;
pmic 7:dc463bf54be6 52 thread_sleep_for(dT_loop_ms);
boro 0:5d4d21d56334 53 }
boro 0:5d4d21d56334 54 }
pmic 13:5d689f89d794 55
pmic 1:4e0e4d0363d9 56 void button_fall()
pmic 1:4e0e4d0363d9 57 {
pmic 1:4e0e4d0363d9 58 user_button_timer.reset();
pmic 1:4e0e4d0363d9 59 user_button_timer.start();
pmic 1:4e0e4d0363d9 60 }
pmic 13:5d689f89d794 61
pmic 1:4e0e4d0363d9 62 void button_rise()
pmic 1:4e0e4d0363d9 63 {
pmic 13:5d689f89d794 64 int t_button_ms = duration_cast<milliseconds>(user_button_timer.elapsed_time()).count();
pmic 1:4e0e4d0363d9 65 user_button_timer.stop();
pmic 13:5d689f89d794 66 if (t_button_ms > 200) {
pmic 13:5d689f89d794 67 executeMainTask = !executeMainTask;
pmic 13:5d689f89d794 68 }
pmic 6:6c1c38d4faa4 69 }