Alex Cordonnier
High level Bluetooth Low Energy API and radio abstraction layer
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BLE_API
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Bluetooth Low Energy
Diff: ble/services/EddystoneService.h
- Revision:
- 830:a6ef72e0697a
- Parent:
- 786:d6d7087d8377
- Child:
- 832:5dac246f8f02
diff -r 9072de50087b -r a6ef72e0697a ble/services/EddystoneService.h
--- a/ble/services/EddystoneService.h Tue Sep 29 09:54:18 2015 +0100
+++ b/ble/services/EddystoneService.h Tue Sep 29 09:54:18 2015 +0100
@@ -19,7 +19,7 @@
#include "ble/BLE.h"
#include "mbed.h"
-
+#include "CircularBuffer.h"
static const uint8_t BEACON_EDDYSTONE[] = {0xAA, 0xFE};
//Debug is disabled by default
@@ -48,19 +48,21 @@
class EddystoneService
{
public:
- /**
- * @brief Transmission Power Modes for UriBeacon
- */
+ enum FrameTypes {
+ NONE,
+ url,
+ uid,
+ tlm
+ };
- static const int ADVERTISING_INTERVAL_MSEC = 1000; // Advertising interval for config service.
static const int SERVICE_DATA_MAX = 31; // Maximum size of service data in ADV packets
// There are currently 3 subframes defined, URI, UID, and TLM
#define EDDYSTONE_MAX_FRAMETYPE 3
void (*frames[EDDYSTONE_MAX_FRAMETYPE])(uint8_t *, uint32_t);
- uint8_t frameIndex;
static const int URI_DATA_MAX = 18;
typedef uint8_t UriData_t[URI_DATA_MAX];
+ CircularBuffer<FrameTypes,EDDYSTONE_MAX_FRAMETYPE> overflow;
// UID Frame Type subfields
static const int UID_NAMESPACEID_SIZE = 10;
@@ -84,7 +86,11 @@
* @param RFU 2B of RFU, initialized to 0x0000 and not broadcast, included for future reference.
*
*/
- void setUIDFrameData(int8_t power, UIDNamespaceID_t namespaceID, UIDInstanceID_t instanceID, uint16_t RFU = 0x0000) {
+ void setUIDFrameData(int8_t power, UIDNamespaceID_t namespaceID, UIDInstanceID_t instanceID, uint32_t uidAdvPeriodIn, uint16_t RFU = 0x0000) {
+ if(0 == uidAdvPeriodIn){
+ uidIsSet = false;
+ return;
+ }
if(power > 20) {
power = 20;
}
@@ -95,6 +101,8 @@
memcpy(defaultUidNamespaceID, namespaceID, UID_NAMESPACEID_SIZE);
memcpy(defaultUidInstanceID, instanceID, UID_INSTANCEID_SIZE);
uidRFU = (uint16_t)RFU; // this is probably bad form, but it doesnt really matter yet.
+ uidAdvPeriod = uidAdvPeriodIn;
+ uidIsSet = true; // set toggle to advertise UID frames
return;
}
@@ -115,12 +123,18 @@
defaultUidPower = -100;
}
Data[index++] = defaultUidPower; // 1B Power @ 0meter
+ DBG("UID NamespaceID = '0x");
for(int x = 0; x < UID_NAMESPACEID_SIZE; x++) { // 10B Namespce ID
Data[index++] = defaultUidNamespaceID[x];
+ DBG("%x,",defaultUidNamespaceID[x]);
}
+ DBG("'\r\n");
+ DBG("UID InstancdID = '0x");
for(int x = 0; x< UID_INSTANCEID_SIZE; x++) { // 6B Instance ID
Data[index++] = defaultUidInstanceID[x];
+ DBG("%x,",defaultUidInstanceID[x]);
}
+ DBG("'\r\n");
if(0 != uidRFU) { // 2B RFU, include if non-zero, otherwise ignore
Data[index++] = (uint8_t)(uidRFU >> 0);
Data[index++] = (uint8_t)(uidRFU >> 8);
@@ -133,14 +147,21 @@
* Set Eddystone URL Frame information.
* @param[in] power TX Power in dB measured at 0 meters from the device.
* @param url URL to encode
+ * @param urlAdvPeriodIn How long to advertise the URL frame (measured in # of adv periods)
* @return false on success, true on failure.
*/
- bool setURLFrameData(int8_t power, const char * url) {
+ bool setURLFrameData(int8_t power, const char * urlIn, uint32_t urlAdvPeriodIn) {
+ if(0 == urlAdvPeriodIn){
+ urlIsSet = false;
+ return false;
+ }
defaultUrlPower = power;
- encodeURL(url, defaultUriData, defaultUriDataLength); // encode URL to URL Formatting
+ encodeURL(urlIn, defaultUriData, defaultUriDataLength); // encode URL to URL Formatting
if (defaultUriDataLength > URI_DATA_MAX) {
return true; // error, URL is too big
}
+ urlAdvPeriod = urlAdvPeriodIn;
+ urlIsSet = true;
return false;
}
@@ -164,16 +185,23 @@
/*
* Set Eddystone TLM Frame information.
* @param[in] Version of the TLM beacon data format
+ * @param[in] advPeriod how often to advertise the TLM frame for (in minutes)
* @param batteryVoltage in milivolts
* @param beaconTemp in 8.8 floating point notation
*
*/
- void setTLMFrameData(uint8_t version, uint16_t batteryVoltage, uint16_t beaconTemp, uint32_t pduCount = 0, uint32_t timeSinceBoot = 0) {
+ void setTLMFrameData(uint8_t version = 0, uint32_t advPeriod = 60, uint16_t batteryVoltage = 0, uint16_t beaconTemp = 0, uint32_t pduCount = 0, uint32_t timeSinceBoot = 0) {
+ if(0 == advPeriod){
+ tlmIsSet = false;
+ return;
+ }
TlmVersion = version;
TlmBatteryVoltage = batteryVoltage;
TlmBeaconTemp = beaconTemp;
TlmPduCount = pduCount; // reset
TlmTimeSinceBoot = timeSinceBoot; // reset
+ TlmAdvPeriod = advPeriod;
+ tlmIsSet = true; // TLM Data has been enabled
return;
}
@@ -191,14 +219,14 @@
Data[index++] = (uint8_t)(TlmBatteryVoltage>>0); // Battery Voltage[1]
Data[index++] = (uint8_t)(TlmBeaconTemp>>8); // Beacon Temp[0]
Data[index++] = (uint8_t)(TlmBeaconTemp>>0); // Beacon Temp[1]
- Data[index++] = (uint8_t)(TlmPduCount>>24); // PDU Count [0]
- Data[index++] = (uint8_t)(TlmPduCount>>16); // PDU Count [1]
- Data[index++] = (uint8_t)(TlmPduCount>>8); // PDU Count [2]
- Data[index++] = (uint8_t)(TlmPduCount>>0); // PDU Count [3]
- Data[index++] = (uint8_t)(TlmTimeSinceBoot>>24); // Time Since Boot [0]
- Data[index++] = (uint8_t)(TlmTimeSinceBoot>>16); // Time Since Boot [1]
- Data[index++] = (uint8_t)(TlmTimeSinceBoot>>8); // Time Since Boot [2]
- Data[index++] = (uint8_t)(TlmTimeSinceBoot>>0); // Time Since Boot [3]
+ Data[index++] = (uint8_t)(TlmPduCount>>24); // PDU Count [0]
+ Data[index++] = (uint8_t)(TlmPduCount>>16); // PDU Count [1]
+ Data[index++] = (uint8_t)(TlmPduCount>>8); // PDU Count [2]
+ Data[index++] = (uint8_t)(TlmPduCount>>0); // PDU Count [3]
+ Data[index++] = (uint8_t)(TlmTimeSinceBoot>>24); // Time Since Boot [0]
+ Data[index++] = (uint8_t)(TlmTimeSinceBoot>>16); // Time Since Boot [1]
+ Data[index++] = (uint8_t)(TlmTimeSinceBoot>>8); // Time Since Boot [2]
+ Data[index++] = (uint8_t)(TlmTimeSinceBoot>>0); // Time Since Boot [3]
DBG("constructURLFrame: %d, %d",maxSize,index);
return index;
}
@@ -264,10 +292,13 @@
// }
// printf("\r\n");
ble.clearAdvertisingPayload();
+ ble.setAdvertisingType(GapAdvertisingParams::ADV_NON_CONNECTABLE_UNDIRECTED);
+ ble.setAdvertisingInterval(100);
ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, BEACON_EDDYSTONE, sizeof(BEACON_EDDYSTONE));
ble.accumulateAdvertisingPayload(GapAdvertisingData::SERVICE_DATA, serviceData, serviceDataLen);
+
return true;
}
@@ -277,7 +308,7 @@
* This function exists because of time constraints in the radioNotificationCallback, so it is effectively
* broken up into two functions.
*/
- void swapOutFrames(void) {
+ void swapOutFrames(FrameTypes frameType) {
uint8_t serviceData[SERVICE_DATA_MAX];
unsigned serviceDataLen = 0;
//hard code in the eddystone UUID
@@ -285,37 +316,114 @@
serviceData[serviceDataLen++] = BEACON_EDDYSTONE[1];
// if certain frames are not enabled, then skip them. Worst case TLM is always enabled
- switch(frameIndex) {
- case 1:
+ switch(frameType) {
+ case tlm:
+ // TLM frame
+ if(tlmIsSet) {
+ DBG("Swapping in TLM Frame: version=%x, Batt=%d, Temp = %d, PDUCnt = %d, TimeSinceBoot=%d",TlmVersion, TlmBatteryVoltage, TlmBeaconTemp, TlmPduCount, TlmTimeSinceBoot);
+ serviceDataLen += constructTLMFrame(serviceData+serviceDataLen,20);
+ DBG("\t Swapping in TLM Frame: len=%d",serviceDataLen);
+ updateAdvPacket(serviceData,serviceDataLen);
+ }
+ break;
+ case url:
// URL Frame
if(urlIsSet) {
- INFO("Swapping in URL Frame: Power: %d",defaultUrlPower);
+ DBG("Swapping in URL Frame: Power: %d",defaultUrlPower);
serviceDataLen += constructURLFrame(serviceData+serviceDataLen,20);
DBG("\t Swapping in URL Frame: len=%d ",serviceDataLen);
updateAdvPacket(serviceData,serviceDataLen);
- switchFlag = false;
- frameIndex++;
- break;
+ //switchFlag = false;
}
- case 2:
+ break;
+ case uid:
// UID Frame
if(uidIsSet) {
- INFO("Swapping in UID Frame: Power: %d",defaultUidPower);
+ DBG("Swapping in UID Frame: Power: %d",defaultUidPower);
serviceDataLen += constructUIDFrame(serviceData+serviceDataLen,20);
DBG("\t Swapping in UID Frame: len=%d",serviceDataLen);
updateAdvPacket(serviceData,serviceDataLen);
- switchFlag = false;
- frameIndex++;
- break;
+ //switchFlag = false;
}
+ break;
default:
- // TLM frame
- INFO("Swapping in TLM Frame: version=%x, Batt=%d, Temp = %d, PDUCnt = %d, TimeSinceBoot=%d",TlmVersion, TlmBatteryVoltage, TlmBeaconTemp, TlmPduCount, TlmTimeSinceBoot);
- serviceDataLen += constructTLMFrame(serviceData+serviceDataLen,20);
- DBG("\t Swapping in TLM Frame: len=%d",serviceDataLen);
- updateAdvPacket(serviceData,serviceDataLen);
- frameIndex++;
- break;
+ ERR("You have not initialized a Frame yet, please initialize one before starting a beacon");
+ ERR("uidIsSet = %d, urlIsSet = %d, tlmIsSet = %d", uidIsSet, urlIsSet, tlmIsSet);
+ }
+ }
+
+ /*
+ * Callback to swap in URL frame
+ */
+ void urlCallback(void) {
+ DBG("urlCallback");
+ if( false == advLock) {
+ advLock = true;
+ DBG("advLock = url")
+ frameIndex = url;
+ swapOutFrames(frameIndex);
+ ble.startAdvertising();
+ } else {
+ // Someone else is broadcasting, toss it into the overflow buffer to retransmit when free
+ INFO("URI(%d) cannot complete, %d is currently broadcasting",url, frameIndex);
+ FrameTypes x = url;
+ overflow.push(x);
+ }
+ return;
+ }
+
+ /*
+ * Callback to swap in UID frame
+ */
+ void uidCallback(void) {
+ DBG("uidCallback");
+ if( false == advLock) {
+ advLock = true;
+ DBG("advLock = uid")
+ frameIndex = uid;
+ swapOutFrames(frameIndex);
+ ble.startAdvertising();
+ } else {
+ // Someone else is broadcasting, toss it into the overflow buffer to retransmit when free
+ INFO("UID(%d) cannot complete, %d is currently broadcasting", uid,frameIndex);
+ FrameTypes x = uid; // have to do this to satisfy cont vs volatile keywords... sigh...
+ overflow.push(x);
+ }
+ return;
+ }
+
+ /*
+ * Callback to swap in TLM frame
+ */
+ void tlmCallback(void) {
+ DBG("tlmCallback");
+ if( false == advLock) {
+ // OK to broadcast
+ advLock = true;
+ DBG("advLock = tlm")
+ frameIndex = tlm;
+ swapOutFrames(frameIndex);
+ ble.startAdvertising();
+ } else {
+ // Someone else is broadcasting, toss it into the overflow buffer to retransmit when free
+ INFO("TLM(%d) cannot complete, %d is currently broadcasting",tlm ,frameIndex);
+ FrameTypes x = tlm;
+ overflow.push(x);
+ }
+ return;
+ }
+
+ void stopAdvCallback(void) {
+ if(overflow.empty()) {
+ // if nothing left to transmit, stop
+ ble.stopAdvertising();
+ advLock = false; // unlock lock
+ } else {
+ // transmit other packets at current time index
+ FrameTypes x = NONE;
+ overflow.pop(x);
+ INFO("Re-Transmitting %d",x);
+ swapOutFrames(x);
}
}
@@ -324,47 +432,15 @@
*/
#define EDDYSTONE_SWAPFRAME_DELAYMS 1
void radioNotificationCallback(bool radioActive) {
- //DBG("RadioNotificationCallback : %d, %d, %d, %d",radioActive,frameIndex,TlmPduCount,TlmTimeSinceBoot);
// Update PDUCount
TlmPduCount++;
- frameIndex = frameIndex % EDDYSTONE_MAX_FRAMETYPE;
-
-
- // True just before an frame is sent, fale just after a frame is sent
+ // True just before an frame is sent, false just after a frame is sent
if(radioActive) {
// Do Nothing
} else {
- // state machine to control which packet is being sent
- switch(frameIndex) {
- case 0: // TLM Frame
- switchFrame.attach_us(this, &EddystoneService::swapOutFrames, EDDYSTONE_SWAPFRAME_DELAYMS);
- switchFlag = true;
- break;
- case 1: // URL Frame
- // switch out packets
- if(switchFlag) {
- switchFrame.attach_us(this, &EddystoneService::swapOutFrames, EDDYSTONE_SWAPFRAME_DELAYMS);
- switchFlag = false;
- } else {
- if((TlmPduCount % 10) == 0) { // every 10 adv packets switch the frame
- switchFlag = true;
- }
- }
- break;
- case 2: // UIDFrame
- // switch out packets
- if(switchFlag ) {
- switchFrame.attach_us(this, &EddystoneService::swapOutFrames, EDDYSTONE_SWAPFRAME_DELAYMS);
- switchFlag = false;
- } else {
- if((TlmPduCount % 10) == 0) { // every 10 adv packets switch the frame
- switchFlag = true;
- }
- }
- break;
- }
+ // Packet has been sent, disable advertising
+ stopAdv.attach_us(this, &EddystoneService::stopAdvCallback, 1);
}
-
return;
}
@@ -373,102 +449,102 @@
* this function should be used in leu of the config service.
*
* @param bleIn ble object used to broadcast eddystone information
- * @oaram beaconPeriodus is how often ble broadcasts are mde, in mili seconds
+ * @param beaconPeriodus is how often ble broadcasts are mde, in mili seconds
* @param txPowerLevel sets the broadcasting power level.
- * @param uidNamespaceID 10Byte Namespace UUID
- * @param uidInstanceID 6Byte Instance UUID
- * @param url shortened URL to broadcast (pass in as a string)
- * @param urlLen length of shortened url
- * @param tlmVersion version of telemetry data field to use (default to 0x00)
*
*/
EddystoneService(BLEDevice &bleIn,
- uint16_t beaconPeriodus = 100,
- uint8_t txPowerLevel = 0,
- uint8_t * uidNamespaceID = NULL,
- uint8_t * uidInstanceID = NULL,
- const char * url = NULL,
- uint8_t urlLen = 0,
- uint8_t tlmVersion = 0) :
- ble(bleIn)
- {
- uint8_t serviceData[SERVICE_DATA_MAX];
- unsigned serviceDataLen = 0;
- ERR("This function is not fully implemented yet, dont use it!!");
- // Check optional frames, set their 'isSet' flags appropriately
- if((uidNamespaceID != NULL) & (uidInstanceID != NULL)) {
- uidIsSet = true;
- setUIDFrameData(txPowerLevel,uidNamespaceID, uidInstanceID);
- } else {
- uidIsSet = false;
- }
- if(url != NULL) {
- urlIsSet = true;
- setURLFrameData(txPowerLevel,url);
- } else {
- uidIsSet = false;
+ uint16_t beaconPeriodus = 100,
+ uint8_t txPowerIn = 0) :
+ ble(bleIn),
+ advPeriodus(beaconPeriodus),
+ txPower(txPowerIn),
+ advLock(false),
+ frameIndex(NONE) {
+
+ }
+
+ /*
+ * @breif this function starts eddystone advertising based on configured frames.
+ */
+ void start(void) {
+ // Initialize Frame transition, start with URL to pass eddystone validator app on first try
+ if (urlIsSet) {
+ frameIndex = url;
+ urlTicker.attach(this, &EddystoneService::urlCallback, urlAdvPeriod);
+ DBG("attached urlCallback every %d seconds", urlAdvPeriod);
}
- // Default TLM frame to version 0x00, start all values at zero to be spec compliant.
- setTLMFrameData(tlmVersion, 0x00,0x00);
-
- // Initialize Frame transition
- frameIndex = 0;
- uidRFU = 0;
- switchFlag = true;
-
- /* Reinitialize the BLE stack. This will clear away the existing services and advertising state. */
- ble.shutdown();
- ble.init();
- ble.setTxPower(txPowerLevel);
- ble.setAdvertisingType(GapAdvertisingParams::ADV_NON_CONNECTABLE_UNDIRECTED);
- ble.setAdvertisingInterval(beaconPeriodus);
+ if (uidIsSet) {
+ frameIndex = uid;
+ uidTicker.attach(this, &EddystoneService::uidCallback, uidAdvPeriod);
+ DBG("attached uidCallback every %d seconds", uidAdvPeriod);
+ }
+ if(tlmIsSet) {
+ frameIndex = tlm;
+ // Make double sure the PDUCount and TimeSinceBoot fields are set to zero at reset
+ updateTlmPduCount(0);
+ updateTlmTimeSinceBoot(0);
+ timeSinceBootTick.attach(this,&EddystoneService::tsbCallback,0.1); // incriment the TimeSinceBoot ticker every 0.1s
+ tlmTicker.attach(this, &EddystoneService::tlmCallback, TlmAdvPeriod);
+ DBG("attached tlmCallback every %d seconds", TlmAdvPeriod);
+ }
+ if(NONE == frameIndex) {
+ error("No Frames were Initialized! Please initialize a frame before starting an eddystone beacon.");
+ }
+ //uidRFU = 0;
- // Make double sure the PDUCount and TimeSinceBoot fields are set to zero at reset
- updateTlmPduCount(0);
- updateTlmTimeSinceBoot(0);
-
- // Construct TLM Frame in initial advertising.
- serviceData[serviceDataLen++] = BEACON_EDDYSTONE[0];
- serviceData[serviceDataLen++] = BEACON_EDDYSTONE[1];
- serviceDataLen += constructTLMFrame(serviceData+serviceDataLen,SERVICE_DATA_MAX);
-
- updateAdvPacket(serviceData, serviceDataLen);
- ble.gap().startAdvertising();
- ble.gap().onRadioNotification(this,&EddystoneService::radioNotificationCallback);
- timeSinceBootTick.attach(this,&EddystoneService::tsbCallback,0.1); // incriment the TimeSinceBoot ticker every 0.1s
-
+ ble.setTxPower(txPower);
+// ble.setAdvertisingType(GapAdvertisingParams::ADV_NON_CONNECTABLE_UNDIRECTED);
+// ble.setAdvertisingInterval(advPeriodus);
+// ble.gap().startAdvertising();
+ ble.gap().onRadioNotification(this,&EddystoneService::radioNotificationCallback);
}
private:
-
+ // Eddystone Variables
BLEDevice &ble;
- Ticker timeSinceBootTick;
- Timeout switchFrame;
-// Default value that is restored on reset
- size_t defaultUriDataLength;
+ uint16_t advPeriodus;
+ uint8_t txPower;
+ Ticker timeSinceBootTick; // counter that counts time since boot
+ volatile bool advLock;
+ volatile FrameTypes frameIndex;
+ Timeout stopAdv;
+
+
+ // URI Frame Variables
+ uint8_t defaultUriDataLength;
UriData_t defaultUriData;
+ int8_t defaultUrlPower;
+ bool urlIsSet; // flag that enables / disable URI Frames
+ uint32_t urlAdvPeriod; // how long the url frame will be advertised for
+ Ticker urlTicker;
+
+ // UID Frame Variables
UIDNamespaceID_t defaultUidNamespaceID;
UIDInstanceID_t defaultUidInstanceID;
int8_t defaultUidPower;
- int8_t defaultUrlPower;
uint16_t uidRFU;
- bool uidIsSet;
- bool urlIsSet;
- bool switchFlag;
+ bool uidIsSet; // flag that enables / disable UID Frames
+ uint32_t uidAdvPeriod; // how long the uid frame will be advertised for
+ Ticker uidTicker;
-// Private Variables for Telemetry Data
+ // TLM Frame Variables
uint8_t TlmVersion;
volatile uint16_t TlmBatteryVoltage;
volatile uint16_t TlmBeaconTemp;
volatile uint32_t TlmPduCount;
volatile uint32_t TlmTimeSinceBoot;
+ bool tlmIsSet; // flag that enables / disables TLM frames
+ uint32_t TlmAdvPeriod; // number of minutes between adv frames
+ Ticker tlmTicker;
public:
/*
* Encode a human-readable URI into the binary format defined by URIBeacon spec (https://github.com/google/uribeacon/tree/master/specification).
*/
- static void encodeURL(const char *uriDataIn, UriData_t uriDataOut, size_t &sizeofURIDataOut) {
+ static void encodeURL(const char *uriDataIn, UriData_t uriDataOut, uint8_t &sizeofURIDataOut) {
+ DBG("Encode URL = %s",uriDataIn);
const char *prefixes[] = {
"http://www.",
"https://www.",
@@ -528,6 +604,7 @@
}
}
/* This is the default case where we've got an ordinary character which doesn't match a suffix. */
+ INFO("Encoding URI: No Suffix Found");
if (i == NUM_SUFFIXES) {
uriDataOut[sizeofURIDataOut++] = *uriDataIn;
++uriDataIn;