Hugo Pristauz / Mbed 2 deprecated S05_Advertising

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependencies:   BLE_API X_NUCLEO_IDB0XA1 mbed

Fork of BLE_HeartRate_IDB0XA1 by ST

bricks/blink.cpp@29:8eb46b976f0f, 2018-05-19 (annotated)

Committer:
hux
Date:
Sat May 19 15:53:19 2018 +0000
Revision:
29:8eb46b976f0f
Published

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hux 29:8eb46b976f0f 1 // blink.cpp - send a morse pattern to LED1
hux 29:8eb46b976f0f 2 //
hux 29:8eb46b976f0f 3 // Function morse() is one way for running LED1 with a blinking sequence using
hux 29:8eb46b976f0f 4 // a busy wait, until the sequence is completed.
hux 29:8eb46b976f0f 5 //
hux 29:8eb46b976f0f 6 // morse(" x xxx x "); send one time morse sequence, interval = 0.2
hux 29:8eb46b976f0f 7 // morse(" x xxx x ",0.5); send one time morse sequence, interval = 0.5
hux 29:8eb46b976f0f 8 //
hux 29:8eb46b976f0f 9 // Function morse() got the additional feature to stop an ongoing timer based
hux 29:8eb46b976f0f 10 // blinking sequence.
hux 29:8eb46b976f0f 11 //
hux 29:8eb46b976f0f 12 // The alternative is to setup an ever repeating blink sequence via LED1 using
hux 29:8eb46b976f0f 13 // function blink(), which is non waiting.
hux 29:8eb46b976f0f 14 //
hux 29:8eb46b976f0f 15 // blink(" x xxx x "); repeating blink sequence, interval = 0.2
hux 29:8eb46b976f0f 16 // blink(" x xxx x ",0.5); repeating blink sequence, interval = 0.5
hux 29:8eb46b976f0f 17 // blink(0); stops blinking sequence
hux 29:8eb46b976f0f 18 //
hux 29:8eb46b976f0f 19
hux 29:8eb46b976f0f 20 #include "bricks/target.h"
hux 29:8eb46b976f0f 21 #include "bricks/blink.h"
hux 29:8eb46b976f0f 22
hux 29:8eb46b976f0f 23 #ifndef LED_INVERTED
hux 29:8eb46b976f0f 24 # define LED_ON 1
hux 29:8eb46b976f0f 25 # define LED_OFF 0
hux 29:8eb46b976f0f 26 #else
hux 29:8eb46b976f0f 27 # define LED_ON 0
hux 29:8eb46b976f0f 28 # define LED_OFF 1
hux 29:8eb46b976f0f 29 #endif
hux 29:8eb46b976f0f 30
hux 29:8eb46b976f0f 31 static DigitalOut led(LED1); // LED1, being used for morse sequence
hux 29:8eb46b976f0f 32 static Ticker ticker; // triggers periodic callbacks
hux 29:8eb46b976f0f 33 static const char *pointer = 0; // 0 means morse activity disabled
hux 29:8eb46b976f0f 34 static const char *sequence = 0; // next morse sequence for repeats
hux 29:8eb46b976f0f 35
hux 29:8eb46b976f0f 36
hux 29:8eb46b976f0f 37 void morse(const char *pattern, double interval)
hux 29:8eb46b976f0f 38 {
hux 29:8eb46b976f0f 39 pointer = 0; // disable ticker based blinking
hux 29:8eb46b976f0f 40 sequence = 0; // set also empty sequence
hux 29:8eb46b976f0f 41
hux 29:8eb46b976f0f 42 for (; *pattern; pattern++)
hux 29:8eb46b976f0f 43 {
hux 29:8eb46b976f0f 44 led = (*pattern == ' ') ? LED_OFF : LED_ON;
hux 29:8eb46b976f0f 45 wait(interval); // busy waiting for interval time
hux 29:8eb46b976f0f 46 }
hux 29:8eb46b976f0f 47 }
hux 29:8eb46b976f0f 48
hux 29:8eb46b976f0f 49 // callback for LED1 ticker controlled blinking
hux 29:8eb46b976f0f 50
hux 29:8eb46b976f0f 51 static void callback(void)
hux 29:8eb46b976f0f 52 {
hux 29:8eb46b976f0f 53 if (pointer != 0)
hux 29:8eb46b976f0f 54 {
hux 29:8eb46b976f0f 55 if (*pointer == 0)
hux 29:8eb46b976f0f 56 {
hux 29:8eb46b976f0f 57 pointer = sequence; // reset pointer to followup sequence
hux 29:8eb46b976f0f 58 }
hux 29:8eb46b976f0f 59
hux 29:8eb46b976f0f 60 if (*pointer)
hux 29:8eb46b976f0f 61 {
hux 29:8eb46b976f0f 62 led = (*pointer++ == ' ') ? LED_OFF : LED_ON;
hux 29:8eb46b976f0f 63 }
hux 29:8eb46b976f0f 64 }
hux 29:8eb46b976f0f 65 }
hux 29:8eb46b976f0f 66
hux 29:8eb46b976f0f 67 void blink(const char *pattern, const char* next, double interval)
hux 29:8eb46b976f0f 68 {
hux 29:8eb46b976f0f 69 pointer = 0; // stop current activities
hux 29:8eb46b976f0f 70 led = LED_OFF; // reset led with LED_OFF
hux 29:8eb46b976f0f 71
hux 29:8eb46b976f0f 72 sequence = next; // init morse sequence
hux 29:8eb46b976f0f 73
hux 29:8eb46b976f0f 74 ticker.attach(callback,interval); // next LED state after every interval
hux 29:8eb46b976f0f 75 pointer = pattern; // enable callback activty
hux 29:8eb46b976f0f 76 }
hux 29:8eb46b976f0f 77
hux 29:8eb46b976f0f 78 void blink(const char *pattern, double interval)
hux 29:8eb46b976f0f 79 {
hux 29:8eb46b976f0f 80 blink(pattern,pattern,interval);
hux 29:8eb46b976f0f 81 }
hux 29:8eb46b976f0f 82