Rob Dobson / BLE_AlarmWatch

Auto updating alarm watch - accepts alarm settings from a BLE device like a Raspberry Pi and buzzes at the appropriate time - also displays binary time

Dependencies:   BLE_API mbed-src nRF51822 nrf51_rtc

WatchTimeService.h@6:4a12e0f03381, 2016-03-01 (annotated)

Committer:
Bobty
Date:
Tue Mar 01 13:03:32 2016 +0000
Revision:
6:4a12e0f03381
Parent:
5:2682353a8c32 
Completed work on display and alarm

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Bobty 3:a4b8d67de1b1 1 // BLE Service for Watch Time
Bobty 3:a4b8d67de1b1 2 // To allow a watch device to be told the current time
Bobty 3:a4b8d67de1b1 3
Bobty 3:a4b8d67de1b1 4 #ifndef __BLE_WATCHTIME_SERVICE_H__
Bobty 3:a4b8d67de1b1 5 #define __BLE_WATCHTIME_SERVICE_H__
Bobty 3:a4b8d67de1b1 6
Bobty 3:a4b8d67de1b1 7 class WatchTimeService {
Bobty 3:a4b8d67de1b1 8 public:
Bobty 3:a4b8d67de1b1 9
Bobty 3:a4b8d67de1b1 10 static const int WatchTime_BlockSize = 7;
Bobty 3:a4b8d67de1b1 11 const static uint16_t WATCHTIME_SERVICE_UUID = 0xFE32;
Bobty 3:a4b8d67de1b1 12 const static uint16_t WATCHTIME_STATE_CHARACTERISTIC_UUID = 0xFE33;
Bobty 6:4a12e0f03381 13 const static uint16_t ALARMTIME_STATE_CHARACTERISTIC_UUID = 0xFE34;
Bobty 3:a4b8d67de1b1 14
Bobty 6:4a12e0f03381 15 WatchTimeService(BLE &ble, uint8_t* pInitialWatchTime, uint8_t* pInitialAlarmTime) :
Bobty 5:2682353a8c32 16 _ble(ble),
Bobty 6:4a12e0f03381 17 _watchTimeVal(WATCHTIME_STATE_CHARACTERISTIC_UUID, pInitialWatchTime, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY),
Bobty 6:4a12e0f03381 18 _alarmTimeVal(ALARMTIME_STATE_CHARACTERISTIC_UUID, pInitialAlarmTime, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY)
Bobty 3:a4b8d67de1b1 19 {
Bobty 6:4a12e0f03381 20 GattCharacteristic *charTable[] = {&_watchTimeVal, &_alarmTimeVal};
Bobty 3:a4b8d67de1b1 21 GattService watchTimeService(WatchTimeService::WATCHTIME_SERVICE_UUID, charTable, sizeof(charTable) / sizeof(GattCharacteristic *));
Bobty 5:2682353a8c32 22 _ble.gattServer().addService(watchTimeService);
Bobty 3:a4b8d67de1b1 23 }
Bobty 3:a4b8d67de1b1 24
Bobty 6:4a12e0f03381 25 void writeWatchTime(time_t timeToWrite)
Bobty 5:2682353a8c32 26 {
Bobty 6:4a12e0f03381 27 uint8_t watchTime[WatchTimeService::WatchTime_BlockSize];
Bobty 6:4a12e0f03381 28 unixTimeToWatchTime(timeToWrite, watchTime);
Bobty 6:4a12e0f03381 29 _ble.gattServer().write(_watchTimeVal.getValueHandle(), watchTime, WatchTime_BlockSize);
Bobty 3:a4b8d67de1b1 30 }
Bobty 3:a4b8d67de1b1 31
Bobty 6:4a12e0f03381 32 GattAttribute::Handle_t getWatchTimeValueHandle()
Bobty 3:a4b8d67de1b1 33 {
Bobty 5:2682353a8c32 34 return _watchTimeVal.getValueHandle();
Bobty 3:a4b8d67de1b1 35 }
Bobty 6:4a12e0f03381 36
Bobty 6:4a12e0f03381 37 GattAttribute::Handle_t getAlarmTimeValueHandle()
Bobty 6:4a12e0f03381 38 {
Bobty 6:4a12e0f03381 39 return _alarmTimeVal.getValueHandle();
Bobty 6:4a12e0f03381 40 }
Bobty 6:4a12e0f03381 41
Bobty 6:4a12e0f03381 42 static time_t watchTimeToUnixTime(const uint8_t* pWatchTime)
Bobty 6:4a12e0f03381 43 {
Bobty 6:4a12e0f03381 44 struct tm tminfo;
Bobty 6:4a12e0f03381 45 tminfo.tm_year = int(pWatchTime[0])*256 + pWatchTime[1] - 1900;
Bobty 6:4a12e0f03381 46 tminfo.tm_mon = pWatchTime[2] - 1;
Bobty 6:4a12e0f03381 47 tminfo.tm_mday = pWatchTime[3];
Bobty 6:4a12e0f03381 48 tminfo.tm_hour = pWatchTime[4];
Bobty 6:4a12e0f03381 49 tminfo.tm_min = pWatchTime[5];
Bobty 6:4a12e0f03381 50 tminfo.tm_sec = pWatchTime[6];
Bobty 6:4a12e0f03381 51 tminfo.tm_isdst = -1;
Bobty 6:4a12e0f03381 52 time_t timest = mktime(&tminfo);
Bobty 6:4a12e0f03381 53 return timest;
Bobty 6:4a12e0f03381 54 }
Bobty 6:4a12e0f03381 55
Bobty 6:4a12e0f03381 56 static void unixTimeToWatchTime(time_t unixTime, uint8_t* pWatchTime)
Bobty 6:4a12e0f03381 57 {
Bobty 6:4a12e0f03381 58 // Convert to localtime
Bobty 6:4a12e0f03381 59 struct tm * timeinfo;
Bobty 6:4a12e0f03381 60 timeinfo = localtime (&unixTime);
Bobty 6:4a12e0f03381 61 pWatchTime[0] = (timeinfo->tm_year + 1900) / 256;
Bobty 6:4a12e0f03381 62 pWatchTime[1] = (timeinfo->tm_year + 1900) % 256;
Bobty 6:4a12e0f03381 63 pWatchTime[2] = timeinfo->tm_mon + 1;
Bobty 6:4a12e0f03381 64 pWatchTime[3] = timeinfo->tm_mday;
Bobty 6:4a12e0f03381 65 pWatchTime[4] = timeinfo->tm_hour;
Bobty 6:4a12e0f03381 66 pWatchTime[5] = timeinfo->tm_min;
Bobty 6:4a12e0f03381 67 pWatchTime[6] = timeinfo->tm_sec;
Bobty 6:4a12e0f03381 68 }
Bobty 3:a4b8d67de1b1 69
Bobty 3:a4b8d67de1b1 70 private:
Bobty 5:2682353a8c32 71 BLE &_ble;
Bobty 5:2682353a8c32 72 ReadWriteArrayGattCharacteristic<uint8_t, WatchTime_BlockSize> _watchTimeVal;
Bobty 6:4a12e0f03381 73 ReadWriteArrayGattCharacteristic<uint8_t, WatchTime_BlockSize> _alarmTimeVal;
Bobty 3:a4b8d67de1b1 74 };
Bobty 3:a4b8d67de1b1 75
Bobty 3:a4b8d67de1b1 76 #endif /* #ifndef __BLE_WATCHTIME_SERVICE_H__ */