Josh Stroud
/
nrf51-evoTest
Example with mbed, ble, and evothings app
Fork of HelloWorld by
main.cpp
- Committer:
- jstroud
- Date:
- 2016-03-15
- Revision:
- 2:3015a85eb00a
- Parent:
- 0:fb6bbc10ffa0
File content as of revision 2:3015a85eb00a:
/* * nRF51-DK BLEDevice service/characteristic (read/write) using mbed.org */ // uncomment if not interested in a console log #define CONSOLE_LOG #include "mbed.h" #include "BLE.h" //------------------------------------------------------------------------- #ifdef CONSOLE_LOG #define INFO(x, ...) printf(x, ##__VA_ARGS__); #define INFO_NL(x, ...) printf(x "\r\n", ##__VA_ARGS__); #else #define INFO(x, ...) #define INFO_NL(x, ...) #endif // a little routine to print a 128-bit UUID nicely void INFO_UUID(const char *prefix, UUID uuid) { uint8_t *p = (uint8_t *)uuid.getBaseUUID(); INFO("%s: ", prefix); for (int i=0; i<16; i++) { INFO("%02x", p[i]); if ((i == 3) || (i == 5) || (i == 7) || (i == 9)) INFO("-"); } INFO_NL(""); } //------------------------------------------------------------------------- // name of the device const static char DEVICE_NAME[] = "nRF51-DK"; // GATT service and characteristic UUIDs const UUID nRF51_GATT_SERVICE = UUID((uint8_t *)"nRF51-DK "); const UUID nRF51_GATT_CHAR_BUTTON = UUID((uint8_t *)"nRF51-DK button "); const UUID nRF51_GATT_CHAR_LED = UUID((uint8_t *)"nRF51-DK led "); #define CHARACTERISTIC_BUTTON 0 #define CHARACTERISTIC_LED 1 #define CHARACTERISTIC_COUNT 2 // our bluetooth smart objects BLEDevice ble; GattService *gatt_service; GattCharacteristic *gatt_characteristics[CHARACTERISTIC_COUNT]; uint8_t gatt_char_value[CHARACTERISTIC_COUNT]; #ifdef CONSOLE_LOG Serial pc(USBTX,USBRX); #endif //------------------------------------------------------------------------- // button handling //------------------------------------------------------------------------- // define our digital in values we will be using for the characteristic DigitalIn button1(P0_17); DigitalIn button2(P0_18); DigitalIn button3(P0_19); DigitalIn button4(P0_20); uint8_t button_new_value = 0; uint8_t button_old_value = button_new_value; void monitorButtons() { // read in the buttons, mapped into nibble (0000 = all off, 1111 = all on) button_new_value = 0; button_new_value |= (button1.read() != 1); button_new_value <<= 1; button_new_value |= (button2.read() != 1); button_new_value <<= 1; button_new_value |= (button3.read() != 1); button_new_value <<= 1; button_new_value |= (button4.read() != 1); // set the updated value of the characteristic if data has changed if (button_new_value != button_old_value) { ble.updateCharacteristicValue( gatt_characteristics[CHARACTERISTIC_BUTTON] -> getValueHandle(), &button_new_value, sizeof(button_new_value)); button_old_value = button_new_value; INFO_NL(" button state: [0x%02x]", button_new_value); } } //------------------------------------------------------------------------- // LED handling //------------------------------------------------------------------------- DigitalOut led1(P0_21); DigitalOut led2(P0_22); DigitalOut led3(P0_23); DigitalOut led4(P0_24); uint8_t led_value = 0; void onLedDataWritten(const uint8_t* value, uint8_t length) { // we only care about a single byte led_value = value[0]; // depending on the value coming through; set/unset LED's if ((led_value & 0x01) != 0) led1.write(0); else led1.write(1); if ((led_value & 0x02) != 0) led2.write(0); else led2.write(1); if ((led_value & 0x04) != 0) led3.write(0); else led3.write(1); if ((led_value & 0x08) != 0) led4.write(0); else led4.write(1); INFO_NL(" led state: [0x%02x]", led_value); } //------------------------------------------------------------------------- void onConnection(const Gap::ConnectionCallbackParams_t *params) { INFO_NL(">> connected"); // set the initial values of the characteristics (for every session) led_value = 0; onLedDataWritten(&led_value, 1); // force LED's to be in off state } void onDataWritten(const GattWriteCallbackParams *context) { // was the characteristic being written to nRF51_GATT_CHAR_LED? if (context -> handle == gatt_characteristics[CHARACTERISTIC_LED] -> getValueHandle()) { onLedDataWritten(context -> data, context -> len); } } void onDisconnection(Gap::Handle_t handle, Gap::DisconnectionReason_t disconnectReason) { INFO_NL(">> disconnected"); ble.startAdvertising(); INFO_NL(">> device advertising"); } int main() { #ifdef CONSOLE_LOG // wait a second before trying to write something to console wait(1); #endif INFO_NL(">> nRF51-DK start"); // create our button characteristic (read, notify) gatt_characteristics[CHARACTERISTIC_BUTTON] = new GattCharacteristic( nRF51_GATT_CHAR_BUTTON, &gatt_char_value[CHARACTERISTIC_BUTTON], 1, 1, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY); // create our LED characteristic (read, write) gatt_characteristics[CHARACTERISTIC_LED] = new GattCharacteristic( nRF51_GATT_CHAR_LED, &gatt_char_value[CHARACTERISTIC_LED], 1, 1, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE_WITHOUT_RESPONSE); // create our service, with both characteristics gatt_service = new GattService(nRF51_GATT_SERVICE, gatt_characteristics, CHARACTERISTIC_COUNT); // initialize our ble device ble.init(); ble.setDeviceName((uint8_t *)DEVICE_NAME); INFO_NL(">> initialized device '%s'", DEVICE_NAME); // configure our advertising type, payload and interval ble.accumulateAdvertisingPayload( GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE); ble.accumulateAdvertisingPayload( GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME)); ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); ble.setAdvertisingInterval(160); // 100ms INFO_NL(">> configured advertising type, payload and interval"); // configure our callbacks //ble.onDisconnection(onDisconnection); ble.onConnection(onConnection); ble.onDataWritten(onDataWritten); INFO_NL(">> registered for callbacks"); // add our gatt service with two characteristics ble.addService(*gatt_service); INFO_NL(">> added GATT service with two characteristics"); // show some debugging information about service/characteristics INFO_UUID(" ", nRF51_GATT_SERVICE); INFO_UUID(" :", nRF51_GATT_CHAR_BUTTON); INFO_UUID(" :", nRF51_GATT_CHAR_LED); // start advertising ble.startAdvertising(); INFO_NL(">> device advertising"); // start monitoring the buttons and posting new values Ticker ticker; ticker.attach(monitorButtons, 0.1); // every 10th of a second INFO_NL(">> monitoring button state"); // let the device do its thing INFO_NL(">> waiting for events "); for (;;) { ble.waitForEvent(); } } //-------------------------------------------------------------------------