Diff: main.cpp

Revision:

0:2e972e7d3f64

Child:

1:e0f4bcce540c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Jan 07 16:46:51 2016 +0000
@@ -0,0 +1,178 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ 
+#include "mbed.h"
+#include "ble/BLE.h"
+#include "ble/DiscoveredCharacteristic.h"
+#include "ble/DiscoveredService.h"
+
+#define SCAN_INT  0x30 // 30 ms = 48 * 0.625 ms
+#define SCAN_WIND 0x30 // 30 ms = 48 * 0.625 ms
+
+ 
+const Gap::Address_t  BLE_address_BE       = {0xCC, 0x00, 0x00, 0xE1, 0x80, 0x02};
+const Gap::Address_t  BLE_peer_address_BE  = {0xFD, 0x66, 0x05, 0x13, 0xBE, 0xBA};
+
+DiscoveredCharacteristic ledCharacteristic;
+
+uint8_t toggledValue = 0;
+enum {
+  READ = 0,
+  WRITE,
+  IDLE
+};
+static volatile unsigned int triggerOp = IDLE;
+
+void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
+{
+    (void)params;
+    printf("disconnected\n\r");
+}
+
+void advertisementCallback(const Gap::AdvertisementCallbackParams_t *params) {
+    if (params->peerAddr[0] != BLE_peer_address_BE[0]) {
+        return;
+    }
+    
+    printf("adv peerAddr[%02x %02x %02x %02x %02x %02x] rssi %d, isScanResponse %u, AdvertisementType %u\r\n",
+           params->peerAddr[5], params->peerAddr[4], params->peerAddr[3], params->peerAddr[2], params->peerAddr[1], params->peerAddr[0],
+           params->rssi, params->isScanResponse, params->type);
+    
+    if(!params->isScanResponse) {
+      BLE::Instance().gap().connect(params->peerAddr, Gap::ADDR_TYPE_PUBLIC, NULL, NULL);
+    }
+}
+
+void discoveryTerminationCallback(Gap::Handle_t connectionHandle) {
+    printf("terminated SD for handle %u\r\n", connectionHandle);
+}
+
+void serviceDiscoveryCallback(const DiscoveredService *service) {
+    if (service->getUUID().shortOrLong() == UUID::UUID_TYPE_SHORT) {
+        printf("S UUID-%x attrs[%u %u]\r\n", service->getUUID().getShortUUID(), service->getStartHandle(), service->getEndHandle());
+    } else {
+        printf("S UUID-");
+        const uint8_t *longUUIDBytes = service->getUUID().getBaseUUID();
+        for (unsigned i = 0; i < UUID::LENGTH_OF_LONG_UUID; i++) {
+            printf("%02X", longUUIDBytes[i]);
+        }
+        printf(" attrs[%u %u]\r\n", service->getStartHandle(), service->getEndHandle());
+    }
+}
+ 
+void characteristicDiscoveryCallback(const DiscoveredCharacteristic *characteristicP) {
+    //printf("  C UUID-%x valueAttr[%u] props[%x]\r\n", characteristicP->getShortUUID(), characteristicP->getValueHandle(), (uint8_t)characteristicP->getProperties().broadcast());
+    if (characteristicP->getUUID().getShortUUID() == 0xa001) { /* !ALERT! Alter this filter to suit your device. */
+      //printf("  C UUID-%x valueAttr[%u] props[%x]\r\n", characteristicP->getShortUUID(), characteristicP->getValueHandle(), (uint8_t)characteristicP->getProperties().broadcast());
+      ledCharacteristic = *characteristicP;
+      triggerOp = READ;
+    }
+}
+
+void connectionCallback(const Gap::ConnectionCallbackParams_t *params) {
+  uint16_t LED_SERVICE_UUID = 0xA000;
+  uint16_t LED_STATE_CHARACTERISTIC_UUID = 0xA001;
+  
+  if (params->role == Gap::CENTRAL) {
+    BLE &ble = BLE::Instance();
+    ble.gattClient().onServiceDiscoveryTermination(discoveryTerminationCallback);
+    ble.gattClient().launchServiceDiscovery(params->handle, serviceDiscoveryCallback, characteristicDiscoveryCallback, LED_SERVICE_UUID, LED_STATE_CHARACTERISTIC_UUID);
+  }
+}
+
+void triggerToggledWrite(const GattReadCallbackParams *response) {
+  if (response->handle == ledCharacteristic.getValueHandle()) {
+#if 0
+    printf("triggerToggledWrite: handle %u, offset %u, len %u\r\n", response->handle, response->offset, response->len);
+    for (unsigned index = 0; index < response->len; index++) {
+      printf("%c[%02x]", response->data[index], response->data[index]);
+    }
+    printf("\r\n");
+#endif
+    
+    toggledValue = response->data[0] ^ 0x1;
+    triggerOp = WRITE;
+  }
+}
+
+void triggerRead(const GattWriteCallbackParams *response) {
+  if (response->handle == ledCharacteristic.getValueHandle()) {
+    triggerOp = READ;
+  }
+}
+
+/** 
+ * This function is called when the ble initialization process has failled 
+ */ 
+void onBleInitError(BLE &ble, ble_error_t error) 
+{ 
+    /* Initialization error handling should go here */ 
+}
+
+/** 
+ * Callback triggered when the ble initialization process has finished 
+ */ 
+void bleInitComplete(BLE::InitializationCompleteCallbackContext *params) 
+{
+    BLE&        ble   = params->ble;
+    ble_error_t error = params->error;
+
+    if (error != BLE_ERROR_NONE) {
+        /* In case of error, forward the error handling to onBleInitError */
+        onBleInitError(ble, error);
+        return;
+    }
+
+    /* Ensure that it is the default instance of BLE */
+    if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
+        return;
+    }
+
+    // Set BT Address
+    ble.gap().setAddress(Gap::ADDR_TYPE_PUBLIC, BLE_address_BE);
+
+    ble.gap().onConnection(connectionCallback);
+    ble.onDisconnection(disconnectionCallback);
+       
+    ble.gattClient().onDataRead(triggerToggledWrite);
+    ble.gattClient().onDataWrite(triggerRead);
+
+    ble.gap().setScanParams(SCAN_INT, SCAN_WIND);
+    ble.gap().startScan(advertisementCallback);
+ 
+    // infinite loop
+    while (1) {
+      if (!ble.gattClient().isServiceDiscoveryActive()) {
+        switch(triggerOp) {
+        case READ:
+          triggerOp = IDLE;
+          ledCharacteristic.read();
+          break;
+        case WRITE:
+          triggerOp = IDLE;
+          ledCharacteristic.write(1, &toggledValue);
+          break;
+        }
+      }
+      ble.waitForEvent();
+    }
+}
+
+int main(void)
+{
+    BLE::Instance().init(bleInitComplete);
+}
+