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ble transmitter
Dependencies: mbed BLE_API nRF51822
transmitter_main.cpp@5:c7bbaa34373a, 2019-04-17 (annotated)
- Committer:
- khyein8154
- Date:
- Wed Apr 17 21:12:57 2019 +0000
- Revision:
- 5:c7bbaa34373a
- Parent:
- 4:c3123e9e7d39
- Child:
- 6:f0984541d764
printing out sequence number
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
aidanjabb | 0:37b6e6dc1a2f | 1 | #include "mbed.h" |
aidanjabb | 0:37b6e6dc1a2f | 2 | #include "ble/BLE.h" |
jzabins2 | 2:f8dfdded83bf | 3 | |
khyein8154 | 5:c7bbaa34373a | 4 | Serial pc(USBTX, USBRX); |
khyein8154 | 5:c7bbaa34373a | 5 | |
aidanjabb | 0:37b6e6dc1a2f | 6 | #define LED_RED p22 |
jzabins2 | 2:f8dfdded83bf | 7 | #define LED_GREEN p21 |
jzabins2 | 2:f8dfdded83bf | 8 | #define LED_BLUE p23 |
jzabins2 | 2:f8dfdded83bf | 9 | #define BUTTON_PIN p17 |
jzabins2 | 2:f8dfdded83bf | 10 | #define BATTERY_PIN p1 |
jzabins2 | 2:f8dfdded83bf | 11 | |
aidanjabb | 0:37b6e6dc1a2f | 12 | DigitalOut led1(p21); |
aidanjabb | 0:37b6e6dc1a2f | 13 | |
jzabins2 | 2:f8dfdded83bf | 14 | struct Packet { |
jzabins2 | 3:76b8337374e7 | 15 | uint32_t seqNum; |
jzabins2 | 4:c3123e9e7d39 | 16 | |
jzabins2 | 4:c3123e9e7d39 | 17 | Packet() : seqNum(0) {} |
jzabins2 | 2:f8dfdded83bf | 18 | }; |
jzabins2 | 2:f8dfdded83bf | 19 | |
jzabins2 | 3:76b8337374e7 | 20 | BLE ble; |
jzabins2 | 3:76b8337374e7 | 21 | const static char DEVICE_NAME[] = "JOEY"; |
aidanjabb | 0:37b6e6dc1a2f | 22 | static volatile bool triggerSensorPolling = false; |
jzabins2 | 3:76b8337374e7 | 23 | |
aidanjabb | 0:37b6e6dc1a2f | 24 | void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params) |
aidanjabb | 0:37b6e6dc1a2f | 25 | { |
aidanjabb | 0:37b6e6dc1a2f | 26 | BLE::Instance(BLE::DEFAULT_INSTANCE).gap().startAdvertising(); // restart advertising |
aidanjabb | 0:37b6e6dc1a2f | 27 | } |
jzabins2 | 3:76b8337374e7 | 28 | |
jzabins2 | 3:76b8337374e7 | 29 | void updatePayload(void) |
jzabins2 | 3:76b8337374e7 | 30 | { |
jzabins2 | 3:76b8337374e7 | 31 | static Packet p; |
jzabins2 | 3:76b8337374e7 | 32 | ble.gap().updateAdvertisingPayload(GapAdvertisingData::MANUFACTURER_SPECIFIC_DATA, (uint8_t *)&p, sizeof(p)); |
jzabins2 | 3:76b8337374e7 | 33 | (p.seqNum)++; |
khyein8154 | 5:c7bbaa34373a | 34 | pc.printf("seq_num: %s" to_string(p.seqNum)); |
jzabins2 | 3:76b8337374e7 | 35 | } |
jzabins2 | 3:76b8337374e7 | 36 | |
aidanjabb | 0:37b6e6dc1a2f | 37 | void periodicCallback(void) |
aidanjabb | 0:37b6e6dc1a2f | 38 | { |
aidanjabb | 0:37b6e6dc1a2f | 39 | led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */ |
jzabins2 | 3:76b8337374e7 | 40 | updatePayload(); |
jzabins2 | 3:76b8337374e7 | 41 | |
aidanjabb | 0:37b6e6dc1a2f | 42 | /* Note that the periodicCallback() executes in interrupt context, so it is safer to do |
aidanjabb | 0:37b6e6dc1a2f | 43 | * heavy-weight sensor polling from the main thread. */ |
aidanjabb | 0:37b6e6dc1a2f | 44 | triggerSensorPolling = true; |
aidanjabb | 0:37b6e6dc1a2f | 45 | } |
jzabins2 | 3:76b8337374e7 | 46 | |
aidanjabb | 0:37b6e6dc1a2f | 47 | void bleInitComplete(BLE::InitializationCompleteCallbackContext *params) |
aidanjabb | 0:37b6e6dc1a2f | 48 | { |
jzabins2 | 3:76b8337374e7 | 49 | BLE &localble = params->ble; |
aidanjabb | 0:37b6e6dc1a2f | 50 | ble_error_t error = params->error; |
jzabins2 | 3:76b8337374e7 | 51 | |
aidanjabb | 0:37b6e6dc1a2f | 52 | if (error != BLE_ERROR_NONE) { |
aidanjabb | 0:37b6e6dc1a2f | 53 | return; |
aidanjabb | 0:37b6e6dc1a2f | 54 | } |
jzabins2 | 3:76b8337374e7 | 55 | |
jzabins2 | 3:76b8337374e7 | 56 | localble.gap().onDisconnection(disconnectionCallback); |
jzabins2 | 3:76b8337374e7 | 57 | |
jzabins2 | 3:76b8337374e7 | 58 | localble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME)); |
jzabins2 | 3:76b8337374e7 | 59 | updatePayload(); |
jzabins2 | 3:76b8337374e7 | 60 | |
jzabins2 | 3:76b8337374e7 | 61 | localble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); |
jzabins2 | 3:76b8337374e7 | 62 | localble.gap().setAdvertisingInterval(1000); /* 1000ms */ |
jzabins2 | 3:76b8337374e7 | 63 | localble.gap().startAdvertising(); |
aidanjabb | 0:37b6e6dc1a2f | 64 | } |
jzabins2 | 3:76b8337374e7 | 65 | |
aidanjabb | 0:37b6e6dc1a2f | 66 | int main(void) |
aidanjabb | 0:37b6e6dc1a2f | 67 | { |
aidanjabb | 0:37b6e6dc1a2f | 68 | led1 = 1; |
jzabins2 | 3:76b8337374e7 | 69 | |
aidanjabb | 0:37b6e6dc1a2f | 70 | Ticker ticker; |
jzabins2 | 3:76b8337374e7 | 71 | ticker.attach(periodicCallback, 1); |
jzabins2 | 3:76b8337374e7 | 72 | |
aidanjabb | 0:37b6e6dc1a2f | 73 | ble.init(bleInitComplete); |
aidanjabb | 0:37b6e6dc1a2f | 74 | |
aidanjabb | 0:37b6e6dc1a2f | 75 | /* SpinWait for initialization to complete. This is necessary because the |
aidanjabb | 0:37b6e6dc1a2f | 76 | * BLE object is used in the main loop below. */ |
aidanjabb | 0:37b6e6dc1a2f | 77 | while (ble.hasInitialized() == false) { /* spin loop */ } |
aidanjabb | 0:37b6e6dc1a2f | 78 | |
aidanjabb | 0:37b6e6dc1a2f | 79 | while (1) { |
aidanjabb | 0:37b6e6dc1a2f | 80 | // check for trigger from periodicCallback() |
aidanjabb | 0:37b6e6dc1a2f | 81 | if (triggerSensorPolling && ble.getGapState().connected) { |
aidanjabb | 0:37b6e6dc1a2f | 82 | triggerSensorPolling = false; |
aidanjabb | 0:37b6e6dc1a2f | 83 | } else { |
aidanjabb | 0:37b6e6dc1a2f | 84 | ble.waitForEvent(); // low power wait for event |
aidanjabb | 0:37b6e6dc1a2f | 85 | } |
aidanjabb | 0:37b6e6dc1a2f | 86 | } |
aidanjabb | 0:37b6e6dc1a2f | 87 | } |