A GattClient example based on ST BlueNRG driving an LED service exported by a BLE_LED peripheral. Shows scanning, connections, service-discovery, and reads/writes.
Dependencies: BLE_API X_NUCLEO_IDB0XA1 mbed
main.cpp@3:b2bf47485f85, 2016-02-26 (annotated)
- Committer:
- apalmieri
- Date:
- Fri Feb 26 11:09:13 2016 +0000
- Revision:
- 3:b2bf47485f85
- Parent:
- 2:c944cfe08e79
Restore original version
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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apalmieri | 0:2e972e7d3f64 | 1 | /* mbed Microcontroller Library |
apalmieri | 0:2e972e7d3f64 | 2 | * Copyright (c) 2006-2013 ARM Limited |
apalmieri | 0:2e972e7d3f64 | 3 | * |
apalmieri | 0:2e972e7d3f64 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
apalmieri | 0:2e972e7d3f64 | 5 | * you may not use this file except in compliance with the License. |
apalmieri | 0:2e972e7d3f64 | 6 | * You may obtain a copy of the License at |
apalmieri | 0:2e972e7d3f64 | 7 | * |
apalmieri | 0:2e972e7d3f64 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
apalmieri | 0:2e972e7d3f64 | 9 | * |
apalmieri | 0:2e972e7d3f64 | 10 | * Unless required by applicable law or agreed to in writing, software |
apalmieri | 0:2e972e7d3f64 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
apalmieri | 0:2e972e7d3f64 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
apalmieri | 0:2e972e7d3f64 | 13 | * See the License for the specific language governing permissions and |
apalmieri | 0:2e972e7d3f64 | 14 | * limitations under the License. |
apalmieri | 0:2e972e7d3f64 | 15 | */ |
apalmieri | 0:2e972e7d3f64 | 16 | |
apalmieri | 0:2e972e7d3f64 | 17 | #include "mbed.h" |
apalmieri | 0:2e972e7d3f64 | 18 | #include "ble/BLE.h" |
apalmieri | 0:2e972e7d3f64 | 19 | #include "ble/DiscoveredCharacteristic.h" |
apalmieri | 0:2e972e7d3f64 | 20 | #include "ble/DiscoveredService.h" |
apalmieri | 0:2e972e7d3f64 | 21 | |
apalmieri | 0:2e972e7d3f64 | 22 | #define SCAN_INT 0x30 // 30 ms = 48 * 0.625 ms |
apalmieri | 0:2e972e7d3f64 | 23 | #define SCAN_WIND 0x30 // 30 ms = 48 * 0.625 ms |
apalmieri | 0:2e972e7d3f64 | 24 | |
apalmieri | 0:2e972e7d3f64 | 25 | |
apalmieri | 0:2e972e7d3f64 | 26 | const Gap::Address_t BLE_address_BE = {0xCC, 0x00, 0x00, 0xE1, 0x80, 0x02}; |
apalmieri | 0:2e972e7d3f64 | 27 | const Gap::Address_t BLE_peer_address_BE = {0xFD, 0x66, 0x05, 0x13, 0xBE, 0xBA}; |
apalmieri | 0:2e972e7d3f64 | 28 | |
apalmieri | 0:2e972e7d3f64 | 29 | DiscoveredCharacteristic ledCharacteristic; |
apalmieri | 0:2e972e7d3f64 | 30 | |
apalmieri | 0:2e972e7d3f64 | 31 | uint8_t toggledValue = 0; |
apalmieri | 0:2e972e7d3f64 | 32 | enum { |
apalmieri | 0:2e972e7d3f64 | 33 | READ = 0, |
apalmieri | 0:2e972e7d3f64 | 34 | WRITE, |
apalmieri | 0:2e972e7d3f64 | 35 | IDLE |
apalmieri | 0:2e972e7d3f64 | 36 | }; |
apalmieri | 0:2e972e7d3f64 | 37 | static volatile unsigned int triggerOp = IDLE; |
apalmieri | 0:2e972e7d3f64 | 38 | |
apalmieri | 0:2e972e7d3f64 | 39 | void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params) |
apalmieri | 0:2e972e7d3f64 | 40 | { |
apalmieri | 0:2e972e7d3f64 | 41 | (void)params; |
apalmieri | 0:2e972e7d3f64 | 42 | printf("disconnected\n\r"); |
apalmieri | 0:2e972e7d3f64 | 43 | } |
apalmieri | 0:2e972e7d3f64 | 44 | |
apalmieri | 0:2e972e7d3f64 | 45 | void advertisementCallback(const Gap::AdvertisementCallbackParams_t *params) { |
apalmieri | 0:2e972e7d3f64 | 46 | if (params->peerAddr[0] != BLE_peer_address_BE[0]) { |
apalmieri | 0:2e972e7d3f64 | 47 | return; |
apalmieri | 0:2e972e7d3f64 | 48 | } |
apalmieri | 0:2e972e7d3f64 | 49 | |
apalmieri | 0:2e972e7d3f64 | 50 | printf("adv peerAddr[%02x %02x %02x %02x %02x %02x] rssi %d, isScanResponse %u, AdvertisementType %u\r\n", |
apalmieri | 0:2e972e7d3f64 | 51 | params->peerAddr[5], params->peerAddr[4], params->peerAddr[3], params->peerAddr[2], params->peerAddr[1], params->peerAddr[0], |
apalmieri | 0:2e972e7d3f64 | 52 | params->rssi, params->isScanResponse, params->type); |
apalmieri | 0:2e972e7d3f64 | 53 | |
apalmieri | 0:2e972e7d3f64 | 54 | if(!params->isScanResponse) { |
apalmieri | 0:2e972e7d3f64 | 55 | BLE::Instance().gap().connect(params->peerAddr, Gap::ADDR_TYPE_PUBLIC, NULL, NULL); |
apalmieri | 0:2e972e7d3f64 | 56 | } |
apalmieri | 0:2e972e7d3f64 | 57 | } |
apalmieri | 0:2e972e7d3f64 | 58 | |
apalmieri | 0:2e972e7d3f64 | 59 | void discoveryTerminationCallback(Gap::Handle_t connectionHandle) { |
apalmieri | 0:2e972e7d3f64 | 60 | printf("terminated SD for handle %u\r\n", connectionHandle); |
apalmieri | 0:2e972e7d3f64 | 61 | } |
apalmieri | 0:2e972e7d3f64 | 62 | |
apalmieri | 0:2e972e7d3f64 | 63 | void serviceDiscoveryCallback(const DiscoveredService *service) { |
apalmieri | 0:2e972e7d3f64 | 64 | if (service->getUUID().shortOrLong() == UUID::UUID_TYPE_SHORT) { |
apalmieri | 0:2e972e7d3f64 | 65 | printf("S UUID-%x attrs[%u %u]\r\n", service->getUUID().getShortUUID(), service->getStartHandle(), service->getEndHandle()); |
apalmieri | 0:2e972e7d3f64 | 66 | } else { |
apalmieri | 0:2e972e7d3f64 | 67 | printf("S UUID-"); |
apalmieri | 0:2e972e7d3f64 | 68 | const uint8_t *longUUIDBytes = service->getUUID().getBaseUUID(); |
apalmieri | 0:2e972e7d3f64 | 69 | for (unsigned i = 0; i < UUID::LENGTH_OF_LONG_UUID; i++) { |
apalmieri | 0:2e972e7d3f64 | 70 | printf("%02X", longUUIDBytes[i]); |
apalmieri | 0:2e972e7d3f64 | 71 | } |
apalmieri | 0:2e972e7d3f64 | 72 | printf(" attrs[%u %u]\r\n", service->getStartHandle(), service->getEndHandle()); |
apalmieri | 0:2e972e7d3f64 | 73 | } |
apalmieri | 0:2e972e7d3f64 | 74 | } |
apalmieri | 0:2e972e7d3f64 | 75 | |
apalmieri | 0:2e972e7d3f64 | 76 | void characteristicDiscoveryCallback(const DiscoveredCharacteristic *characteristicP) { |
apalmieri | 0:2e972e7d3f64 | 77 | //printf(" C UUID-%x valueAttr[%u] props[%x]\r\n", characteristicP->getShortUUID(), characteristicP->getValueHandle(), (uint8_t)characteristicP->getProperties().broadcast()); |
apalmieri | 0:2e972e7d3f64 | 78 | if (characteristicP->getUUID().getShortUUID() == 0xa001) { /* !ALERT! Alter this filter to suit your device. */ |
apalmieri | 0:2e972e7d3f64 | 79 | //printf(" C UUID-%x valueAttr[%u] props[%x]\r\n", characteristicP->getShortUUID(), characteristicP->getValueHandle(), (uint8_t)characteristicP->getProperties().broadcast()); |
apalmieri | 0:2e972e7d3f64 | 80 | ledCharacteristic = *characteristicP; |
apalmieri | 0:2e972e7d3f64 | 81 | triggerOp = READ; |
apalmieri | 0:2e972e7d3f64 | 82 | } |
apalmieri | 0:2e972e7d3f64 | 83 | } |
apalmieri | 0:2e972e7d3f64 | 84 | |
apalmieri | 0:2e972e7d3f64 | 85 | void connectionCallback(const Gap::ConnectionCallbackParams_t *params) { |
apalmieri | 0:2e972e7d3f64 | 86 | uint16_t LED_SERVICE_UUID = 0xA000; |
apalmieri | 0:2e972e7d3f64 | 87 | uint16_t LED_STATE_CHARACTERISTIC_UUID = 0xA001; |
apalmieri | 0:2e972e7d3f64 | 88 | |
apalmieri | 0:2e972e7d3f64 | 89 | if (params->role == Gap::CENTRAL) { |
apalmieri | 0:2e972e7d3f64 | 90 | BLE &ble = BLE::Instance(); |
apalmieri | 0:2e972e7d3f64 | 91 | ble.gattClient().onServiceDiscoveryTermination(discoveryTerminationCallback); |
apalmieri | 0:2e972e7d3f64 | 92 | ble.gattClient().launchServiceDiscovery(params->handle, serviceDiscoveryCallback, characteristicDiscoveryCallback, LED_SERVICE_UUID, LED_STATE_CHARACTERISTIC_UUID); |
apalmieri | 0:2e972e7d3f64 | 93 | } |
apalmieri | 0:2e972e7d3f64 | 94 | } |
apalmieri | 0:2e972e7d3f64 | 95 | |
apalmieri | 0:2e972e7d3f64 | 96 | void triggerToggledWrite(const GattReadCallbackParams *response) { |
apalmieri | 0:2e972e7d3f64 | 97 | if (response->handle == ledCharacteristic.getValueHandle()) { |
apalmieri | 0:2e972e7d3f64 | 98 | #if 0 |
apalmieri | 0:2e972e7d3f64 | 99 | printf("triggerToggledWrite: handle %u, offset %u, len %u\r\n", response->handle, response->offset, response->len); |
apalmieri | 0:2e972e7d3f64 | 100 | for (unsigned index = 0; index < response->len; index++) { |
apalmieri | 0:2e972e7d3f64 | 101 | printf("%c[%02x]", response->data[index], response->data[index]); |
apalmieri | 0:2e972e7d3f64 | 102 | } |
apalmieri | 0:2e972e7d3f64 | 103 | printf("\r\n"); |
apalmieri | 0:2e972e7d3f64 | 104 | #endif |
apalmieri | 0:2e972e7d3f64 | 105 | |
apalmieri | 0:2e972e7d3f64 | 106 | toggledValue = response->data[0] ^ 0x1; |
apalmieri | 0:2e972e7d3f64 | 107 | triggerOp = WRITE; |
apalmieri | 0:2e972e7d3f64 | 108 | } |
apalmieri | 0:2e972e7d3f64 | 109 | } |
apalmieri | 0:2e972e7d3f64 | 110 | |
apalmieri | 0:2e972e7d3f64 | 111 | void triggerRead(const GattWriteCallbackParams *response) { |
apalmieri | 0:2e972e7d3f64 | 112 | if (response->handle == ledCharacteristic.getValueHandle()) { |
apalmieri | 0:2e972e7d3f64 | 113 | triggerOp = READ; |
apalmieri | 0:2e972e7d3f64 | 114 | } |
apalmieri | 0:2e972e7d3f64 | 115 | } |
apalmieri | 0:2e972e7d3f64 | 116 | |
apalmieri | 0:2e972e7d3f64 | 117 | /** |
apalmieri | 0:2e972e7d3f64 | 118 | * This function is called when the ble initialization process has failled |
apalmieri | 0:2e972e7d3f64 | 119 | */ |
apalmieri | 0:2e972e7d3f64 | 120 | void onBleInitError(BLE &ble, ble_error_t error) |
apalmieri | 0:2e972e7d3f64 | 121 | { |
apalmieri | 0:2e972e7d3f64 | 122 | /* Initialization error handling should go here */ |
apalmieri | 0:2e972e7d3f64 | 123 | } |
apalmieri | 0:2e972e7d3f64 | 124 | |
apalmieri | 0:2e972e7d3f64 | 125 | /** |
apalmieri | 0:2e972e7d3f64 | 126 | * Callback triggered when the ble initialization process has finished |
apalmieri | 0:2e972e7d3f64 | 127 | */ |
apalmieri | 0:2e972e7d3f64 | 128 | void bleInitComplete(BLE::InitializationCompleteCallbackContext *params) |
apalmieri | 0:2e972e7d3f64 | 129 | { |
apalmieri | 0:2e972e7d3f64 | 130 | BLE& ble = params->ble; |
apalmieri | 0:2e972e7d3f64 | 131 | ble_error_t error = params->error; |
apalmieri | 0:2e972e7d3f64 | 132 | |
apalmieri | 0:2e972e7d3f64 | 133 | if (error != BLE_ERROR_NONE) { |
apalmieri | 0:2e972e7d3f64 | 134 | /* In case of error, forward the error handling to onBleInitError */ |
apalmieri | 0:2e972e7d3f64 | 135 | onBleInitError(ble, error); |
apalmieri | 0:2e972e7d3f64 | 136 | return; |
apalmieri | 0:2e972e7d3f64 | 137 | } |
apalmieri | 0:2e972e7d3f64 | 138 | |
apalmieri | 0:2e972e7d3f64 | 139 | /* Ensure that it is the default instance of BLE */ |
apalmieri | 0:2e972e7d3f64 | 140 | if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) { |
apalmieri | 0:2e972e7d3f64 | 141 | return; |
apalmieri | 0:2e972e7d3f64 | 142 | } |
apalmieri | 0:2e972e7d3f64 | 143 | |
apalmieri | 0:2e972e7d3f64 | 144 | // Set BT Address |
apalmieri | 1:e0f4bcce540c | 145 | ble.gap().setAddress(BLEProtocol::AddressType::PUBLIC, BLE_address_BE); |
apalmieri | 0:2e972e7d3f64 | 146 | |
apalmieri | 0:2e972e7d3f64 | 147 | ble.gap().onConnection(connectionCallback); |
apalmieri | 0:2e972e7d3f64 | 148 | ble.onDisconnection(disconnectionCallback); |
apalmieri | 0:2e972e7d3f64 | 149 | |
apalmieri | 0:2e972e7d3f64 | 150 | ble.gattClient().onDataRead(triggerToggledWrite); |
apalmieri | 0:2e972e7d3f64 | 151 | ble.gattClient().onDataWrite(triggerRead); |
apalmieri | 0:2e972e7d3f64 | 152 | |
apalmieri | 0:2e972e7d3f64 | 153 | ble.gap().setScanParams(SCAN_INT, SCAN_WIND); |
apalmieri | 0:2e972e7d3f64 | 154 | ble.gap().startScan(advertisementCallback); |
apalmieri | 0:2e972e7d3f64 | 155 | |
apalmieri | 0:2e972e7d3f64 | 156 | // infinite loop |
apalmieri | 0:2e972e7d3f64 | 157 | while (1) { |
apalmieri | 0:2e972e7d3f64 | 158 | if (!ble.gattClient().isServiceDiscoveryActive()) { |
apalmieri | 0:2e972e7d3f64 | 159 | switch(triggerOp) { |
apalmieri | 0:2e972e7d3f64 | 160 | case READ: |
apalmieri | 0:2e972e7d3f64 | 161 | triggerOp = IDLE; |
apalmieri | 0:2e972e7d3f64 | 162 | ledCharacteristic.read(); |
apalmieri | 0:2e972e7d3f64 | 163 | break; |
apalmieri | 0:2e972e7d3f64 | 164 | case WRITE: |
apalmieri | 0:2e972e7d3f64 | 165 | triggerOp = IDLE; |
apalmieri | 0:2e972e7d3f64 | 166 | ledCharacteristic.write(1, &toggledValue); |
apalmieri | 0:2e972e7d3f64 | 167 | break; |
apalmieri | 0:2e972e7d3f64 | 168 | } |
apalmieri | 0:2e972e7d3f64 | 169 | } |
apalmieri | 0:2e972e7d3f64 | 170 | ble.waitForEvent(); |
apalmieri | 0:2e972e7d3f64 | 171 | } |
apalmieri | 0:2e972e7d3f64 | 172 | } |
apalmieri | 0:2e972e7d3f64 | 173 | |
apalmieri | 0:2e972e7d3f64 | 174 | int main(void) |
apalmieri | 0:2e972e7d3f64 | 175 | { |
apalmieri | 0:2e972e7d3f64 | 176 | BLE::Instance().init(bleInitComplete); |
apalmieri | 2:c944cfe08e79 | 177 | } |