Diff: main.cpp

Revision:

0:701da26ee5cb

Child:

2:f11df1469db2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Feb 23 12:51:28 2014 +0000
@@ -0,0 +1,215 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2014 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 "TMP102.h"
+#include "nRF51822n.h"
+
+nRF51822n   nrf;                               /* BLE radio driver */
+TMP102      healthThemometer(p22, p20, 0x90);  /* The TMP102 connected to our board */
+
+/* LEDs and serial output for debug: */
+DigitalOut  led1(LED1);
+DigitalOut  led2(LED2);
+Serial      pc(USBTX,USBRX);
+
+
+/* Device Information service */
+uint8_t            manufacturerName[4] = { 'm', 'b', 'e', 'd' };
+GattService        deviceInformationService ( GattService::UUID_DEVICE_INFORMATION_SERVICE );
+GattCharacteristic deviceManufacturer ( GattCharacteristic::UUID_MANUFACTURER_NAME_STRING_CHAR,
+                                        sizeof(manufacturerName), sizeof(manufacturerName),
+                                        GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ);
+
+/* Health Thermometer Service */ 
+uint8_t             thermTempPayload[5] = { 0, 0, 0, 0, 0 };
+GattService         thermService (GattService::UUID_HEALTH_THERMOMETER_SERVICE);
+GattCharacteristic  thermTemp (GattCharacteristic::UUID_TEMPERATURE_MEASUREMENT_CHAR,
+                               5, 5, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_INDICATE);
+
+/* Battery Level Service */
+uint8_t            batt = 100;     /* Battery level */
+uint8_t            read_batt = 0; /* Variable to hold battery level reads */
+GattService        battService ( GattService::UUID_BATTERY_SERVICE );
+GattCharacteristic battLevel   ( GattCharacteristic::UUID_BATTERY_LEVEL_CHAR, 1, 1,
+                                 GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY |
+                                 GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ);
+
+
+/* Advertising data and parameters */
+GapAdvertisingData   advData;
+GapAdvertisingData   scanResponse;
+GapAdvertisingParams advParams ( GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED );
+uint16_t             uuid16_list[] = {GattService::UUID_HEALTH_THERMOMETER_SERVICE,
+                                      GattService::UUID_BATTERY_SERVICE};
+
+uint32_t quick_ieee11073_from_float(float temperature);
+void updateServiceValues(void);
+
+/**************************************************************************/
+/*!
+    @brief  This custom class can be used to override any GapEvents
+            that you are interested in handling on an application level.
+*/
+/**************************************************************************/
+class GapEventHandler : public GapEvents
+{
+    virtual void onTimeout(void) 
+    {
+        pc.printf("Advertising Timeout!\n\r");
+        // Restart the advertising process with a much slower interval,
+        // only start advertising again after a button press, etc.
+    }    
+
+    virtual void onConnected(void)
+    {
+        pc.printf("Connected!\n\r");
+    }
+
+    virtual void onDisconnected(void)
+    {
+        pc.printf("Disconnected!\n\r");
+        pc.printf("Restarting the advertising process\n\r");
+        nrf.getGap().startAdvertising(advParams);
+    }
+};
+
+/**************************************************************************/
+/*!
+    @brief  This custom class can be used to override any GattServerEvents
+            that you are interested in handling on an application level.
+*/
+/**************************************************************************/
+class GattServerEventHandler : public GattServerEvents
+{
+    //virtual void onDataSent(void) {}
+    //virtual void onDataWritten(void) {}
+    
+    virtual void onUpdatesEnabled(uint16_t charHandle)
+    {
+        if (charHandle == thermTemp.handle)
+        {
+            pc.printf("Temperature indication enabled\n\r");
+        }
+    }
+    
+    virtual void onUpdatesDisabled(uint16_t charHandle)
+    {
+        if (charHandle == thermTemp.handle)
+        {
+            pc.printf("Temperature indication disabled\n\r");
+        }
+    }
+    
+    virtual void onConfirmationReceived(uint16_t charHandle)
+    {
+        if (charHandle == thermTemp.handle)
+        {
+            pc.printf("Temperature indication received\n\r");
+        }
+    }
+};
+
+/**************************************************************************/
+/*!
+    @brief  Program entry point
+*/
+/**************************************************************************/
+int main(void)
+{
+    pc.baud(115200);
+    
+    /* Setup blinky: led1 is toggled in main, led2 is toggled via Ticker */
+    led1=1;
+    led2=0;
+
+    /* Setup the local GAP/GATT event handlers */
+    nrf.getGap().setEventHandler(new GapEventHandler());
+    nrf.getGattServer().setEventHandler(new GattServerEventHandler());
+
+    /* Initialise the nRF51822 */
+    pc.printf("Initialising the nRF51822\n\r");
+    nrf.init();
+
+    /* Make sure we get a clean start */
+    nrf.reset();    
+
+    /* Add BLE-Only flag and complete service list to the advertising data */
+    advData.addFlags(GapAdvertisingData::BREDR_NOT_SUPPORTED);
+    advData.addData(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, 
+                   (uint8_t*)uuid16_list, sizeof(uuid16_list));
+    advData.addAppearance(GapAdvertisingData::GENERIC_THERMOMETER);
+    nrf.getGap().setAdvertisingData(advData, scanResponse);
+
+    /* Health Thermometer Service */
+    thermService.addCharacteristic(thermTemp);
+    nrf.getGattServer().addService(thermService);
+    
+    /* Add the Battery Level service */
+    battService.addCharacteristic(battLevel);
+    nrf.getGattServer().addService(battService);
+
+    /* Start advertising (make sure you've added all your data first) */
+    nrf.getGap().startAdvertising(advParams);
+    
+    /* Now that we're live, update the battery level characteristic, and */
+    /* change the device manufacturer characteristic to 'mbed' */
+    nrf.getGattServer().updateValue(battLevel.handle, (uint8_t*)&batt, sizeof(batt));
+    nrf.getGattServer().updateValue(deviceManufacturer.handle, manufacturerName, sizeof(manufacturerName));
+    nrf.getGattServer().updateValue(thermTemp.handle, thermTempPayload, sizeof(thermTempPayload));
+
+
+    for (;;)
+    {
+        wait(1);
+        updateServiceValues();
+    }
+}
+
+/**************************************************************************/
+/*!
+    @brief  Ticker callback to switch led2 state
+*/
+/**************************************************************************/
+void updateServiceValues(void)
+{
+      /* Toggle the LEDs */
+      led1 = !led1;
+      led2 = !led2;
+      
+      /* Update battery level */
+      nrf.getGattServer().updateValue(battLevel.handle, (uint8_t*)&batt, sizeof(batt));
+      
+      /* Update the temperature */
+      float temperature = healthThemometer.read();
+      uint32_t temp_ieee11073 = quick_ieee11073_from_float(temperature);
+      memcpy(thermTempPayload+1, &temp_ieee11073, 4);
+      nrf.getGattServer().updateValue(thermTemp.handle, thermTempPayload, sizeof(thermTempPayload));
+      printf("Temperature: %f Celsius\r\n", temperature);
+}
+
+/**
+ * @brief A very quick conversion between a float temperature and 11073-20601 FLOAT-Type.
+ * @param temperature The temperature as a float.
+ * @return The temperature in 11073-20601 FLOAT-Type format.
+ */
+uint32_t quick_ieee11073_from_float(float temperature)
+{
+    uint8_t  exponent = 0xFF; //exponent is -1
+    uint32_t mantissa = (uint32_t)(temperature*10);
+    
+    return ( ((uint32_t)exponent) << 24) | mantissa;
+}
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