Hugo Pristauz / Mbed 2 deprecated N06_NAND

A cute tiny piece of code implementing an IoT NAND device, demonstrating how to setup and advertise a cute GATT (NAND) service. The code has been tested on a Nordic nRF51822-DK.

Dependencies:   BLE_API mbed nRF51822

Fork of BLE_HeartRate_IDB0XA1 by ST

bricks/blinker.cpp@26:dce30a5341bb, 2018-05-19 (annotated)

Committer:
hux
Date:
Sat May 19 14:10:17 2018 +0000
Revision:
26:dce30a5341bb
Parent:
25:339931243be4 
Published

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hux 25:339931243be4 1 // blinker.cpp - send a morse pattern to LED1
hux 25:339931243be4 2 //
hux 25:339931243be4 3 // Function morse() is one way for running LED1 with a blinking sequence using
hux 25:339931243be4 4 // a busy wait, until the sequence is completed.
hux 25:339931243be4 5 //
hux 25:339931243be4 6 // Blinker b;
hux 25:339931243be4 7 // b.morse(" x xxx x "); send one time morse sequence, interval = 0.2
hux 25:339931243be4 8 // b.morse(" x xxx x ",0.5); send one time morse sequence, interval = 0.5
hux 25:339931243be4 9 //
hux 25:339931243be4 10 // Function morse(o) got the additional feature to stop an ongoing timer based
hux 25:339931243be4 11 // blinking sequence.
hux 25:339931243be4 12 //
hux 25:339931243be4 13 // The alternative is to setup an ever repeating blink sequence via LED1 using
hux 25:339931243be4 14 // function blink(), which is non waiting.
hux 25:339931243be4 15 //
hux 25:339931243be4 16 // Blinker b;
hux 25:339931243be4 17 // b.blink(" x xxx x "); repeating blink sequence, interval = 0.2
hux 25:339931243be4 18 // b.blink(" x xxx x ",0.5); repeating blink sequence, interval = 0.5
hux 25:339931243be4 19 // b.blink(); stops blinking sequence
hux 25:339931243be4 20 //
hux 25:339931243be4 21
hux 25:339931243be4 22 #include "bricks/target.h"
hux 25:339931243be4 23 #include "bricks/blinker.h"
hux 25:339931243be4 24
hux 25:339931243be4 25 #ifndef LED_INVERTED
hux 25:339931243be4 26 # define LED_ON 1
hux 25:339931243be4 27 # define LED_OFF 0
hux 25:339931243be4 28 #else
hux 25:339931243be4 29 # define LED_ON 0
hux 25:339931243be4 30 # define LED_OFF 1
hux 25:339931243be4 31 #endif
hux 25:339931243be4 32
hux 25:339931243be4 33 #ifndef BLINK_LED
hux 25:339931243be4 34 # define BLINK_LED LED1
hux 25:339931243be4 35 #endif
hux 25:339931243be4 36
hux 25:339931243be4 37 static DigitalOut led(BLINK_LED); // being used for morse sequence
hux 25:339931243be4 38 static Ticker ticker; // triggers periodic callbacks
hux 25:339931243be4 39 static const char *pointer = 0; // 0 means morse activity disabled
hux 25:339931243be4 40 static const char *sequence = 0; // next morse sequence for repeats
hux 25:339931243be4 41
hux 25:339931243be4 42 void Blinker::morse(const char *pattern, double interval)
hux 25:339931243be4 43 {
hux 25:339931243be4 44 pointer = 0; // disable ticker based blinking
hux 25:339931243be4 45 sequence = 0; // set also empty sequence
hux 25:339931243be4 46
hux 25:339931243be4 47 for (; *pattern; pattern++)
hux 25:339931243be4 48 {
hux 25:339931243be4 49 led = (*pattern == ' ') ? LED_OFF : LED_ON;
hux 25:339931243be4 50 wait(interval); // busy waiting for interval time
hux 25:339931243be4 51 }
hux 25:339931243be4 52 }
hux 25:339931243be4 53
hux 25:339931243be4 54 // callback for LED1 ticker controlled blinking
hux 25:339931243be4 55
hux 25:339931243be4 56 static void cbBlinker(void) // blinker callback
hux 25:339931243be4 57 {
hux 25:339931243be4 58 if (pointer != 0)
hux 25:339931243be4 59 {
hux 25:339931243be4 60 if (*pointer == 0)
hux 25:339931243be4 61 {
hux 25:339931243be4 62 pointer = sequence; // reset pointer to followup sequence
hux 25:339931243be4 63 }
hux 25:339931243be4 64
hux 25:339931243be4 65 if (*pointer)
hux 25:339931243be4 66 {
hux 25:339931243be4 67 led = (*pointer++ == ' ') ? LED_OFF : LED_ON;
hux 25:339931243be4 68 }
hux 25:339931243be4 69 }
hux 25:339931243be4 70 }
hux 25:339931243be4 71
hux 25:339931243be4 72 void Blinker::blink(const char *pattern, const char* next, double interval)
hux 25:339931243be4 73 {
hux 25:339931243be4 74 pointer = 0; // stop current activities
hux 25:339931243be4 75 led = LED_OFF; // reset led with LED_OFF
hux 25:339931243be4 76
hux 25:339931243be4 77 sequence = next; // init morse sequence
hux 25:339931243be4 78
hux 25:339931243be4 79 ticker.attach(cbBlinker,interval);// next LED state after every interval
hux 25:339931243be4 80 pointer = pattern; // enable callback activty
hux 25:339931243be4 81 }
hux 25:339931243be4 82
hux 25:339931243be4 83 void Blinker::blink(const char *pattern, double interval)
hux 25:339931243be4 84 {
hux 25:339931243be4 85 blink(pattern,pattern,interval);
hux 25:339931243be4 86 }
hux 25:339931243be4 87
hux 25:339931243be4 88