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
bricks/blink.cpp
- Committer:
- hux
- Date:
- 2017-10-21
- Revision:
- 12:0d0ca44397dd
- Parent:
- 11:80f2c19ecbce
File content as of revision 12:0d0ca44397dd:
// blink.cpp - send a morse pattern to LED1 // // Function morse() is one way for running LED1 with a blinking sequence using // a busy wait, until the sequence is completed. // // morse(o," x xxx x "); send one time morse sequence, interval = 0.2 // morse(o," x xxx x ",0.5); send one time morse sequence, interval = 0.5 // // Function morse(o) got the additional feature to stop an ongoing timer based // blinking sequence. // // The alternative is to setup an ever repeating blink sequence via LED1 using // function blink(), which is non waiting. // // blink(o," x xxx x "); repeating blink sequence, interval = 0.2 // blink(o," x xxx x ",0.5); repeating blink sequence, interval = 0.5 // blink(o); stops blinking sequence // #include "bricks/target.h" #include "bricks/blink.h" #ifndef LED_INVERTED # define LED_ON 1 # define LED_OFF 0 #else # define LED_ON 0 # define LED_OFF 1 #endif #ifndef BLINK_LED # define BLINK_LED LED1 #endif static DigitalOut led(BLINK_LED); // being used for morse sequence static Ticker ticker; // triggers periodic callbacks static const char *pointer = 0; // 0 means morse activity disabled static const char *sequence = 0; // next morse sequence for repeats void morse(O&o,const char *pattern, double interval) { pointer = 0; // disable ticker based blinking sequence = 0; // set also empty sequence for (; *pattern; pattern++) { led = (*pattern == ' ') ? LED_OFF : LED_ON; wait(interval); // busy waiting for interval time } } // callback for LED1 ticker controlled blinking static void cbBlinker(void) // blinker callback { if (pointer != 0) { if (*pointer == 0) { pointer = sequence; // reset pointer to followup sequence } if (*pointer) { led = (*pointer++ == ' ') ? LED_OFF : LED_ON; } } } void blink(O&o,const char *pattern, const char* next, double interval) { pointer = 0; // stop current activities led = LED_OFF; // reset led with LED_OFF sequence = next; // init morse sequence ticker.attach(cbBlinker,interval);// next LED state after every interval pointer = pattern; // enable callback activty } void blink(O&o, const char *pattern, double interval) { blink(o,pattern,pattern,interval); }