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@13:0563f1aa6a75, 2017-10-21 (annotated)

Committer:
hux
Date:
Sat Oct 21 19:56:15 2017 +0000
Revision:
13:0563f1aa6a75
Parent:
12:0d0ca44397dd 
Switch LED via BLE GATT

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 12:0d0ca44397dd 6 // morse(o," x xxx x "); send one time morse sequence, interval = 0.2
hux 12:0d0ca44397dd 7 // morse(o," x xxx x ",0.5); send one time morse sequence, interval = 0.5
hux 11:80f2c19ecbce 8 //
hux 12:0d0ca44397dd 9 // Function morse(o) 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 12:0d0ca44397dd 15 // blink(o," x xxx x "); repeating blink sequence, interval = 0.2
hux 12:0d0ca44397dd 16 // blink(o," x xxx x ",0.5); repeating blink sequence, interval = 0.5
hux 12:0d0ca44397dd 17 // blink(o); 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 12:0d0ca44397dd 31 #ifndef BLINK_LED
hux 12:0d0ca44397dd 32 # define BLINK_LED LED1
hux 12:0d0ca44397dd 33 #endif
hux 12:0d0ca44397dd 34
hux 12:0d0ca44397dd 35 static DigitalOut led(BLINK_LED); // being used for morse sequence
hux 11:80f2c19ecbce 36 static Ticker ticker; // triggers periodic callbacks
hux 11:80f2c19ecbce 37 static const char *pointer = 0; // 0 means morse activity disabled
hux 11:80f2c19ecbce 38 static const char *sequence = 0; // next morse sequence for repeats
hux 11:80f2c19ecbce 39
hux 11:80f2c19ecbce 40
hux 12:0d0ca44397dd 41 void morse(O&o,const char *pattern, double interval)
hux 11:80f2c19ecbce 42 {
hux 11:80f2c19ecbce 43 pointer = 0; // disable ticker based blinking
hux 11:80f2c19ecbce 44 sequence = 0; // set also empty sequence
hux 11:80f2c19ecbce 45
hux 11:80f2c19ecbce 46 for (; *pattern; pattern++)
hux 11:80f2c19ecbce 47 {
hux 11:80f2c19ecbce 48 led = (*pattern == ' ') ? LED_OFF : LED_ON;
hux 11:80f2c19ecbce 49 wait(interval); // busy waiting for interval time
hux 11:80f2c19ecbce 50 }
hux 11:80f2c19ecbce 51 }
hux 11:80f2c19ecbce 52
hux 11:80f2c19ecbce 53 // callback for LED1 ticker controlled blinking
hux 11:80f2c19ecbce 54
hux 12:0d0ca44397dd 55 static void cbBlinker(void) // blinker callback
hux 11:80f2c19ecbce 56 {
hux 11:80f2c19ecbce 57 if (pointer != 0)
hux 11:80f2c19ecbce 58 {
hux 11:80f2c19ecbce 59 if (*pointer == 0)
hux 11:80f2c19ecbce 60 {
hux 12:0d0ca44397dd 61 pointer = sequence; // reset pointer to followup sequence
hux 11:80f2c19ecbce 62 }
hux 11:80f2c19ecbce 63
hux 11:80f2c19ecbce 64 if (*pointer)
hux 11:80f2c19ecbce 65 {
hux 11:80f2c19ecbce 66 led = (*pointer++ == ' ') ? LED_OFF : LED_ON;
hux 11:80f2c19ecbce 67 }
hux 11:80f2c19ecbce 68 }
hux 11:80f2c19ecbce 69 }
hux 11:80f2c19ecbce 70
hux 12:0d0ca44397dd 71 void blink(O&o,const char *pattern, const char* next, double interval)
hux 11:80f2c19ecbce 72 {
hux 11:80f2c19ecbce 73 pointer = 0; // stop current activities
hux 11:80f2c19ecbce 74 led = LED_OFF; // reset led with LED_OFF
hux 11:80f2c19ecbce 75
hux 11:80f2c19ecbce 76 sequence = next; // init morse sequence
hux 11:80f2c19ecbce 77
hux 12:0d0ca44397dd 78 ticker.attach(cbBlinker,interval);// next LED state after every interval
hux 11:80f2c19ecbce 79 pointer = pattern; // enable callback activty
hux 11:80f2c19ecbce 80 }
hux 11:80f2c19ecbce 81
hux 12:0d0ca44397dd 82 void blink(O&o, const char *pattern, double interval)
hux 11:80f2c19ecbce 83 {
hux 12:0d0ca44397dd 84 blink(o,pattern,pattern,interval);
hux 11:80f2c19ecbce 85 }
hux 12:0d0ca44397dd 86
hux 11:80f2c19ecbce 87