Hugo Pristauz / Mbed 2 deprecated M18_LED_Switch

A nice BLE demo program which allows remote switch of an LED via GATT interface.

Dependencies:   BLE_API mbed nRF51822

Fork of BLE_Button by Bluetooth Low Energy

bricks/blink.cpp@11:80f2c19ecbce, 2017-01-07 (annotated)

Committer:
hux
Date:
Sat Jan 07 23:48:53 2017 +0000
Revision:
11:80f2c19ecbce
Child:
12:0d0ca44397dd
New Blob class derived from BLE class

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hux 11:80f2c19ecbce 1 // blink.cpp - send a morse pattern to LED1
hux 11:80f2c19ecbce 2 //
hux 11:80f2c19ecbce 3 // Function morse() is one way for running LED1 with a blinking sequence using
hux 11:80f2c19ecbce 4 // a busy wait, until the sequence is completed.
hux 11:80f2c19ecbce 5 //
hux 11:80f2c19ecbce 6 // morse(" x xxx x "); send one time morse sequence, interval = 0.2
hux 11:80f2c19ecbce 7 // morse(" x xxx x ",0.5); send one time morse sequence, interval = 0.5
hux 11:80f2c19ecbce 8 //
hux 11:80f2c19ecbce 9 // Function morse() got the additional feature to stop an ongoing timer based
hux 11:80f2c19ecbce 10 // blinking sequence.
hux 11:80f2c19ecbce 11 //
hux 11:80f2c19ecbce 12 // The alternative is to setup an ever repeating blink sequence via LED1 using
hux 11:80f2c19ecbce 13 // function blink(), which is non waiting.
hux 11:80f2c19ecbce 14 //
hux 11:80f2c19ecbce 15 // blink(" x xxx x "); repeating blink sequence, interval = 0.2
hux 11:80f2c19ecbce 16 // blink(" x xxx x ",0.5); repeating blink sequence, interval = 0.5
hux 11:80f2c19ecbce 17 // blink(0); stops blinking sequence
hux 11:80f2c19ecbce 18 //
hux 11:80f2c19ecbce 19
hux 11:80f2c19ecbce 20 #include "bricks/target.h"
hux 11:80f2c19ecbce 21 #include "bricks/blink.h"
hux 11:80f2c19ecbce 22
hux 11:80f2c19ecbce 23 #ifndef LED_INVERTED
hux 11:80f2c19ecbce 24 # define LED_ON 1
hux 11:80f2c19ecbce 25 # define LED_OFF 0
hux 11:80f2c19ecbce 26 #else
hux 11:80f2c19ecbce 27 # define LED_ON 0
hux 11:80f2c19ecbce 28 # define LED_OFF 1
hux 11:80f2c19ecbce 29 #endif
hux 11:80f2c19ecbce 30
hux 11:80f2c19ecbce 31 static DigitalOut led(LED1); // LED1, being used for morse sequence
hux 11:80f2c19ecbce 32 static Ticker ticker; // triggers periodic callbacks
hux 11:80f2c19ecbce 33 static const char *pointer = 0; // 0 means morse activity disabled
hux 11:80f2c19ecbce 34 static const char *sequence = 0; // next morse sequence for repeats
hux 11:80f2c19ecbce 35
hux 11:80f2c19ecbce 36
hux 11:80f2c19ecbce 37 void morse(const char *pattern, double interval)
hux 11:80f2c19ecbce 38 {
hux 11:80f2c19ecbce 39 pointer = 0; // disable ticker based blinking
hux 11:80f2c19ecbce 40 sequence = 0; // set also empty sequence
hux 11:80f2c19ecbce 41
hux 11:80f2c19ecbce 42 for (; *pattern; pattern++)
hux 11:80f2c19ecbce 43 {
hux 11:80f2c19ecbce 44 led = (*pattern == ' ') ? LED_OFF : LED_ON;
hux 11:80f2c19ecbce 45 wait(interval); // busy waiting for interval time
hux 11:80f2c19ecbce 46 }
hux 11:80f2c19ecbce 47 }
hux 11:80f2c19ecbce 48
hux 11:80f2c19ecbce 49 // callback for LED1 ticker controlled blinking
hux 11:80f2c19ecbce 50
hux 11:80f2c19ecbce 51 static void callback(void)
hux 11:80f2c19ecbce 52 {
hux 11:80f2c19ecbce 53 if (pointer != 0)
hux 11:80f2c19ecbce 54 {
hux 11:80f2c19ecbce 55 if (*pointer == 0)
hux 11:80f2c19ecbce 56 {
hux 11:80f2c19ecbce 57 pointer = sequence; // reset pointer to followup sequence
hux 11:80f2c19ecbce 58 }
hux 11:80f2c19ecbce 59
hux 11:80f2c19ecbce 60 if (*pointer)
hux 11:80f2c19ecbce 61 {
hux 11:80f2c19ecbce 62 led = (*pointer++ == ' ') ? LED_OFF : LED_ON;
hux 11:80f2c19ecbce 63 }
hux 11:80f2c19ecbce 64 }
hux 11:80f2c19ecbce 65 }
hux 11:80f2c19ecbce 66
hux 11:80f2c19ecbce 67 void blink(const char *pattern, const char* next, double interval)
hux 11:80f2c19ecbce 68 {
hux 11:80f2c19ecbce 69 pointer = 0; // stop current activities
hux 11:80f2c19ecbce 70 led = LED_OFF; // reset led with LED_OFF
hux 11:80f2c19ecbce 71
hux 11:80f2c19ecbce 72 sequence = next; // init morse sequence
hux 11:80f2c19ecbce 73
hux 11:80f2c19ecbce 74 ticker.attach(callback,interval); // next LED state after every interval
hux 11:80f2c19ecbce 75 pointer = pattern; // enable callback activty
hux 11:80f2c19ecbce 76 }
hux 11:80f2c19ecbce 77
hux 11:80f2c19ecbce 78 void blink(const char *pattern, double interval)
hux 11:80f2c19ecbce 79 {
hux 11:80f2c19ecbce 80 blink(pattern,pattern,interval);
hux 11:80f2c19ecbce 81 }
hux 11:80f2c19ecbce 82