Rob Griffith / Mbed 2 deprecated rat_code

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Dependencies:   mbed QEI

src/systick.cpp@1:6f18bb7a77a5, 2018-11-15 (annotated)

Committer:
dionigi
Date:
Thu Nov 15 17:19:20 2018 +0000
Revision:
1:6f18bb7a77a5
Added assignment3 files

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dionigi 1:6f18bb7a77a5 1 #include "systick.h"
dionigi 1:6f18bb7a77a5 2 #include "mbed.h"
dionigi 1:6f18bb7a77a5 3 #include "globals.h"
dionigi 1:6f18bb7a77a5 4
dionigi 1:6f18bb7a77a5 5 void systickFunction() {
dionigi 1:6f18bb7a77a5 6 // Update global counter
dionigi 1:6f18bb7a77a5 7 millis++;
dionigi 1:6f18bb7a77a5 8
dionigi 1:6f18bb7a77a5 9 /**
dionigi 1:6f18bb7a77a5 10 * Assignment 3ab: Do something with your controllers here,
dionigi 1:6f18bb7a77a5 11 * maybe update them? (hint hint)
dionigi 1:6f18bb7a77a5 12 **/
dionigi 1:6f18bb7a77a5 13 mainController.update();
dionigi 1:6f18bb7a77a5 14 }
dionigi 1:6f18bb7a77a5 15
dionigi 1:6f18bb7a77a5 16 void Systick::start() {
dionigi 1:6f18bb7a77a5 17 /**
dionigi 1:6f18bb7a77a5 18 * Assignment 3a: Start your systick function (above).
dionigi 1:6f18bb7a77a5 19 * Hint: use 'm_systicker', the Ticker variable (systick.h).
dionigi 1:6f18bb7a77a5 20 **/
dionigi 1:6f18bb7a77a5 21 m_systicker.attach_us(&systickFunction, 1000);
dionigi 1:6f18bb7a77a5 22 }
dionigi 1:6f18bb7a77a5 23
dionigi 1:6f18bb7a77a5 24 void Systick::stop() {
dionigi 1:6f18bb7a77a5 25 /**
dionigi 1:6f18bb7a77a5 26 * Assignment 3a: Stop the systick (use "detach" function of the Ticker class).
dionigi 1:6f18bb7a77a5 27 **/
dionigi 1:6f18bb7a77a5 28 m_systicker.detach();
dionigi 1:6f18bb7a77a5 29 }
dionigi 1:6f18bb7a77a5 30
dionigi 1:6f18bb7a77a5 31 Systick::Systick() {
dionigi 1:6f18bb7a77a5 32 // A little bit of magic; if you want to know why, ask Robert
dionigi 1:6f18bb7a77a5 33 NVIC_SetPriority(TIM5_IRQn, 255);
dionigi 1:6f18bb7a77a5 34 }
dionigi 1:6f18bb7a77a5 35
dionigi 1:6f18bb7a77a5 36 void Systick::wait(float sec) {
dionigi 1:6f18bb7a77a5 37 // Utility function: allows you to wait while using systick.
dionigi 1:6f18bb7a77a5 38 int init = millis;
dionigi 1:6f18bb7a77a5 39
dionigi 1:6f18bb7a77a5 40 float num_ticks = sec / SYS_TICK_TIME;
dionigi 1:6f18bb7a77a5 41
dionigi 1:6f18bb7a77a5 42 while (millis - init < num_ticks)
dionigi 1:6f18bb7a77a5 43 ;
dionigi 1:6f18bb7a77a5 44 }