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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
Diff: main.cpp
- Revision:
- 23:2e73c391bb12
- Parent:
- 22:d467526abc4a
- Child:
- 25:339931243be4
--- a/main.cpp Sun Dec 18 05:33:58 2016 +0000 +++ b/main.cpp Sun Jan 08 23:15:53 2017 +0000 @@ -1,111 +1,46 @@ -#include <mbed.h> -#include "ble/BLE.h" -#include "bricks.h" - -//============================================================================== -// Custom Service Definition -//============================================================================== +// N06_NAND: demonstration of 'NAND' GATT service +// Program has been tested on nRF51822-DK + +#include "bricks/bricks.h" - typedef union Buffer - { - uint8_t ubuf[10]; - char cbuf[10]; - uint8_t byte; - uint16_t word16; - uint32_t word32; - int i; - double d; - float f; - } Buffer; - -// Service svc(0xA000); // setup GATT service, UUID 0xA000 -// Characteristic a(svc,0xA001,"r"); // characteristic A with UUID 0xA001 -// Characteristic x(svc,0xA002,"w"); // characteristic X with UUID 0xA002 -// Characteristic y(svc,0xA003,"w"); // characteristic Y with UUID 0xA003 - - static Buffer adata[1]; - ReadOnlyArrayGattCharacteristic<Buffer,1> a(0xA001, adata); + Service tiny(0xA000,"Tiny"); // Tiny Service + Characteristic<Digital> chrInput1(tiny, 0xA001, "w", "Input1"); + Characteristic<Digital> chrInput2(tiny, 0xA002, "w", "Input2"); + Characteristic<Digital> chrOutput(tiny, 0xA003, "n", "Output"); - static Buffer xdata[1]; - WriteOnlyArrayGattCharacteristic<Buffer,1> x(0xA002, xdata); - - static Buffer ydata[1]; - WriteOnlyArrayGattCharacteristic<Buffer,1> y(0xA002, ydata); - - GattCharacteristic *characteristics[] = {&a,&x,&y}; - GattService service(0xA000, characteristics, sizeof(characteristics) / sizeof(GattCharacteristic *)); - -//============================================================================== -// Some Callbacks -//============================================================================== - - void onWritten(Blob &blue) // Handle writes to writeCharacteristic + void cbWritten(O&o) // data written callback { - const GattWriteCallbackParams *p = blue.pWritten; - - // Check to see what characteristic was written, by handle - - if(p->handle == x.getValueHandle()) - blink("x x x xxx x ",CONNECTED); - else if(p->handle == y.getValueHandle()) - blink("x x x xxx xxx x ",CONNECTED); - - // Update the readChar with the value of writeChar - - //blue.pble->gattServer().write(a.getValueHandle(), p->data, p->len); - blue.gatt().write(a.getValueHandle(), p->data, p->len); + Digital in1, in2, out; // need some local variables + + if (updated(o,chrInput1) || updated(o,chrInput2)) // changed inputs? + { + get(o,chrInput1,in1); // get value of Input1 characteristics + get(o,chrInput2,in2); // get value of Input2 characteristics + out = !(in1 && in2); // perform NAND (Not AND) operation + set(o,chrOutput,out); // store result to Output characteristics + } } - - void onConnect(Blob &blue) // Connection Callback + void cbDisconnect(O&o) // disconnection callback { - blink("x x x ",CONNECTED); // indicate advertising + advertise(o); // resume advertising on disconnection } - - - void onDisconnect(Blob &blue) // Disconnection Callback + + void cbSetup(O&o) // setup calback (after BLE init) { - blue.start(); // start advertising on client disconnect - blink(ADVERTISE); // indicate advertising - } - - - void onError(Blob &blue) // Error Reporting Callback - { - (void) blue; // Avoid compiler warnings - blink(FAULT); // indicate advertising - } - + onDisconnect(o,cbDisconnect); // setup disconnection callback + onWritten(o,cbWritten); // setup data written callback + + device(o,"NAND Gate"); // setup device name + name(o,"N04#1.0 NAND"); // add name to device + enroll(o,tiny); // enroll (register) TINY service - void onSetup(Blob &blue) // Immediately After Initializing BLE - { - blue.device("nRF51-DK"); // setup device name - blue.data("ABCDEF"); // setup advertising data - blue.name("T06.0 Custom GATT"); // setup advertising name - - blue.onConnect(onConnect); // setup connection callback - blue.onDisconnect(onDisconnect); // setup disconnection callback - blue.onWritten(onWritten); // setup data written callback - - //blue.service(svc); // setup custom service - blue.service(service); // setup custom service - - blue.advertise("C:ng",100); // start advertising @ 100 msec interval - blink(ADVERTISE); // show that board is advertising + advertise(o,"C:ng",100); // start advertising @ 100 msec interval } -//============================================================================== -// Main Program -//============================================================================== - int main(void) { - blink(IDLE); // idle blinking - just started! - - Blob blue; // declare a blob (BLe OBject) - blue.init(onSetup,onError); // init BLE base layer, always do first - - while (true) // Infinite loop waiting for BLE events - blue.sleep(); // low power waiting for BLE events - } - + O o; // Oh-ohh - our Blob (BLuetooth OBject) + init(o,cbSetup); // init BLE base layer, always do first + for(;;) sleep(o); // low power waiting for BLE events + } \ No newline at end of file