/*******************************************************************************
* Function Name: GenericEventHandler
********************************************************************************
* Summary:
* Event handler function for the BLE stack. All the events by BLE stack
* are received by application through this function. For this, CyBle_ProcessEvents()
* should be called continuously in main loop.
*
* Parameters:
* event: event value
* eventParame: pointer to the location where relevant event data is stored
*
* Return:
* void
*
*******************************************************************************/
void GenericEventHandler(uint32 event, void * eventParam)
{
/* Local variables and data structures*/
CYBLE_GATTS_WRITE_REQ_PARAM_T writeReqData;
CYBLE_GATTC_WRITE_REQ_T writeADVcounterdata;
CYBLE_GAPC_ADV_REPORT_T scan_report;
CYBLE_GATTS_WRITE_CMD_REQ_PARAM_T writeCmdData;
CYBLE_API_RESULT_T apiResult;
CYBLE_GATTC_WRITE_REQ_T writeRGBdata;
switch(event)
{
case CYBLE_EVT_STACK_ON:
#ifdef DEBUG_ENABLED
UART_UartPutString("CYBLE_EVT_STACK_ON ");
UART_UartPutCRLF(' ');
#endif
/* At the start of the BLE stack, start advertisement */
CyBle_GappStartAdvertisement(CYBLE_ADVERTISING_FAST);
break;
case CYBLE_EVT_GAPP_ADVERTISEMENT_START_STOP:
/* This event is received at every start or stop of peripheral advertisement*/
#ifdef DEBUG_ENABLED
UART_UartPutString("CYBLE_EVT_GAPP_ADVERTISEMENT_START_STOP ");
SendBLEStatetoUART(CyBle_GetState());
UART_UartPutCRLF(' ');
#endif
if((CYBLE_STATE_DISCONNECTED == CyBle_GetState()) && (switch_Role == FALSE))
{
/* If the current state of the BLE is Disconnected, then restart advertisement.
* Note that the advertisement should only be restarted if the switch flag is not
* TRUE. If switch role flag is TRUE, then there is no need to start advertisement
* as the GAP role has to be switched*/
CyBle_GappStartAdvertisement(CYBLE_ADVERTISING_FAST);
if(apiResult == CYBLE_ERROR_OK)
{
#ifdef DEBUG_ENABLED
UART_UartPutString("Restart Advertisement ");
SendBLEStatetoUART(CyBle_GetState());
UART_UartPutCRLF(' ');
#endif
}
}
break;
case CYBLE_EVT_GAPC_SCAN_START_STOP:
/* This event is received at every start or stop of central scanning*/
#ifdef DEBUG_ENABLED
UART_UartPutString("CYBLE_EVT_GAPC_SCAN_START_STOP ");
SendBLEStatetoUART(CyBle_GetState());
UART_UartPutCRLF(' ');
#endif
break;
case CYBLE_EVT_GATT_CONNECT_IND:
/* This event is received at GATT connection with a device. This event
* is received for both Client or Server role */
#ifdef DEBUG_ENABLED
UART_UartPutString("CYBLE_EVT_GATT_CONNECT_IND ");
UART_UartPutCRLF(' ');
#endif
break;
case CYBLE_EVT_GATT_DISCONNECT_IND:
/* This event is received at GATT disconnection with a device. This event
* is received for both Client or Server role */
#ifdef DEBUG_ENABLED
UART_UartPutString("CYBLE_EVT_GATT_DISCONNECT_IND ");
UART_UartPutCRLF(' ');
#endif
break;
case CYBLE_EVT_GATTS_WRITE_REQ:
/* This event is received at when Server receives a Write request from
* connected Client device */
/* Save the associated event parameter in local variable */
writeReqData = *(CYBLE_GATTS_WRITE_REQ_PARAM_T*)eventParam;
if(writeReqData.handleValPair.attrHandle == CYBLE_RGB_LED_CONTROL_CHAR_HANDLE)
{
/* If the Write request is on RGB LED Control Characteristic, then Client is
* trying to set a new color to the device. */
if(writeReqData.handleValPair.value.len == RGB_LED_DATA_LEN)
{
#ifdef DEBUG_ENABLED
UART_UartPutString("RGB CYBLE_EVT_GATTS_WRITE_REQ ");
UART_UartPutCRLF(' ');
#endif
/* Extract the four bytes containing the color value and store it */
RGBData[RGB_RED_INDEX] = writeReqData.handleValPair.value.val[0];
RGBData[RGB_GREEN_INDEX] = writeReqData.handleValPair.value.val[1];
RGBData[RGB_BLUE_INDEX] = writeReqData.handleValPair.value.val[2];
RGBData[RGB_INTENSITY_INDEX] = writeReqData.handleValPair.value.val[3];
/* Modify RGB Color my configuring the PrISM components with new density
* value*/
UpdateRGBled(RGBData, RGB_LED_DATA_LEN);
/* Update the RGB LED Control characteristic in GATT DB to allow
* Client to read the latest RGB LED color value set */
CyBle_GattsWriteAttributeValue(&writeReqData.handleValPair,0,&cyBle_connHandle,CYBLE_GATT_DB_LOCALLY_INITIATED);
#ifdef ENABLE_ADV_DATA_COUNTER
/* Increment the ADV data counter so that scanning Central device knows
* if this device has updated RGB LED data or not */
dataADVCounter++;
#endif
#ifdef DEBUG_ENABLED
UART_UartPutString("incremented dataADVCounter value in CYBLE_EVT_GATTS_WRITE_REQ= ");
PrintNum(dataADVCounter);
UART_UartPutCRLF(' ');
#endif
/* After receiveing the color value, set the switch role flag to allow the system
* to switch role to Central role */
switch_Role = TRUE;
#ifdef DEBUG_ENABLED
UART_UartPutString("switchRole to Central");
UART_UartPutCRLF(' ');
#endif
}
else
{
/* Send the error code for invalid attribute length packet */
SendErrorCode(CYBLE_GATT_WRITE_REQ,
writeReqData.handleValPair.attrHandle,
ERR_INVALID_ATT_LEN);
return;
}
}
/* As part of every write request, the server needs to send a write response. Note
* that this will be sent only if all the application layer conditions are met on a
* write request. Else, an appropriate error code is sent. */
CyBle_GattsWriteRsp(cyBle_connHandle);
break;
case CYBLE_EVT_GATTS_WRITE_CMD_REQ:
/* This event is generated whenever a Client device sends a Write Command (Write
* without response) to a connected Server. Save the associated event parameter in
* local variable. */
writeCmdData = *(CYBLE_GATTS_WRITE_CMD_REQ_PARAM_T*)eventParam;
/* Check if the Write command is for ADV Data counter characteristic */
if(writeCmdData.handleValPair.attrHandle == CYBLE_RGB_DATA_COUNT_CHAR_HANDLE)
{
/* If the data sent is of one byte, then proceed. */
if(writeCmdData.handleValPair.value.len == 1)
{
/* Extract and save the set ADV data counter value */
dataADVCounter = *(writeCmdData.handleValPair.value.val);
/* This increment is done to balance the ++ done as part of CYBLE_EVT_GATTS_WRITE_REQ */
dataADVCounter--;
/* Update the ADV data counter characteristic in GATT DB to allow
* Client to read the latest ADV data counter value */
CyBle_GattsWriteAttributeValue(&writeCmdData.handleValPair,
0,
&cyBle_connHandle,
CYBLE_GATT_DB_LOCALLY_INITIATED);
#ifdef DEBUG_ENABLED
UART_UartPutString("dataADVCounter from CYBLE_EVT_GATTS_WRITE_CMD_REQ = ");
PrintNum(dataADVCounter);
UART_UartPutCRLF(' ');
#endif
} /* if(writeCmdData.handleValPair.value.len == 1) */
}
break;
case CYBLE_EVT_GAPC_SCAN_PROGRESS_RESULT:
/* This event is generated whenever there is a peripheral device found by
* while scanning */
if(CYBLE_STATE_CONNECTED != CyBle_GetState())
{
/* If we are not connected to any peripheral device, then save the new device
* information so to add it to our list */
scan_report = *(CYBLE_GAPC_ADV_REPORT_T*)eventParam;
#ifdef DEBUG_ENABLED
UART_UartPutString("CYBLE_EVT_GAPC_SCAN_PROGRESS_RESULT ");
UART_UartPutCRLF(' ');
#endif
#ifdef ENABLE_ADV_DATA_COUNTER
/* If ADV DATA COUNTER is enabled, then the central device would check
* if the counter in ADV packet of peripheral is less than its own counter
* or not. If yes, then it will consider the peripheral as a potential
* device to connect to.*/
if(scan_report.eventType == CYBLE_GAPC_CONN_UNDIRECTED_ADV)
{
/* If the scan report received is of advertising nature and the data
* length is as expected... */
if(scan_report.dataLen == new_advData.advDataLen)
{
/* If the second last value of the advertising data matches the custom
* marker, then the peripheral is a node of the network */
if(scan_report.data[scan_report.dataLen-2] == CUSTOM_ADV_DATA_MARKER)
{
/* If the ADV counter data in Advertising data is less than that of
* the value in this scanning device, then the node is a potential node
* whose color has to be updated. */
if((scan_report.data[scan_report.dataLen-1] < dataADVCounter) ||
((scan_report.data[scan_report.dataLen-1] == 255) && (dataADVCounter == 0)))
{
/* Potential node found*/
potential_node_found = TRUE;
/* Save the advertising peripheral address and type*/
memcpy(potential_node_bdAddr, scan_report.peerBdAddr, 6);
potential_node_bdAddrType = scan_report.peerAddrType;
#ifdef DEBUG_ENABLED
UART_UartPutString("potential_node_found ");
UART_UartPutCRLF(' ');
#endif
}
else
{
/* If the ADV data counter is equal or more than the data counter
* in this scanning device, then the node has latest RGB LED data
* and does not need to be connected to. Reset the potential node
* address */
potential_node_found = FALSE;
potential_node_bdAddrType = 0;
potential_node_bdAddr[0] = 0x00;
potential_node_bdAddr[1] = 0x00;
potential_node_bdAddr[2] = 0x00;
potential_node_bdAddr[3] = 0x00;
potential_node_bdAddr[4] = 0x00;
potential_node_bdAddr[5] = 0x00;
}
}
}
}
#endif
/* If the received scan data is part of scan response from a peripheral... */
if(scan_report.eventType == CYBLE_GAPC_SCAN_RSP)
{
/* If the data lenght of the scan reponse packet is equal to expected
* scan response data lenght...*/
if(scan_report.dataLen == SCAN_TAG_DATA_LEN)
{
#ifdef ENABLE_ADV_DATA_COUNTER
/* If a potential node had been found earlier as part of received
* advertising data, then compare the address of stored potential
* node and received address of the scan response */
if(potential_node_found)
{
/* Compare the two addresses and type */
if((!memcmp(scan_report.peerBdAddr, potential_node_bdAddr, 6))
&& (potential_node_bdAddrType == scan_report.peerAddrType))
{
#endif
/* If the scan report data matches the expected data (scan_tag),
* then it is our desired node */
if(!memcmp(scan_report.data, scan_tag, scan_report.dataLen))
{
#ifdef DEBUG_ENABLED
UART_UartPutString("Titan Found ");
UART_UartPutCRLF(' ');
#endif
/* Stop existing scan */
CyBle_GapcStopScan();
#ifdef DEBUG_ENABLED
UART_UartPutString("Stop Scan called ");
UART_UartPutCRLF(' ');
#endif
/* Save the peripheral BD address and type*/
peripAddr.type = scan_report.peerAddrType;
peripAddr.bdAddr[0] = scan_report.peerBdAddr[0];
peripAddr.bdAddr[1] = scan_report.peerBdAddr[1];
peripAddr.bdAddr[2] = scan_report.peerBdAddr[2];
peripAddr.bdAddr[3] = scan_report.peerBdAddr[3];
peripAddr.bdAddr[4] = scan_report.peerBdAddr[4];
peripAddr.bdAddr[5] = scan_report.peerBdAddr[5];
/* Set the flag to allow application to connect to the
* peripheral found */
clientConnectToDevice = TRUE;
#ifdef ENABLE_ADV_DATA_COUNTER
/* Reset the potential node flag*/
potential_node_found = FALSE;
#endif
}
#ifdef ENABLE_ADV_DATA_COUNTER
}
}
#endif
}
}
}
break;
case CYBLE_EVT_GAP_DEVICE_CONNECTED:
/* This event is received whenever the device connect on GAP layer */
if(ble_gap_state == BLE_CENTRAL)
{
#ifdef ENABLE_CENTRAL_DISCOVERY
/* The Device is connected now. Start Attributes discovery process.*/
CyBle_GattcStartDiscovery(cyBle_connHandle);
#ifdef DEBUG_ENABLED
UART_UartPutString("CYBLE_EVT_GAP_DEVICE_CONNECTED ");
SendBLEStatetoUART(CyBle_GetState());
UART_UartPutCRLF(' ');
#endif
#else
/* If this system is currently acting in Central role and has connected
* to a peripheral device, then write directly the ADV counter data and
* RGB LED control data using attribute handles */
/* Set the device connected flag */
deviceConnected = TRUE;
#ifdef DEBUG_ENABLED
UART_UartPutString("Directly write RGB using Attr handle ");
SendBLEStatetoUART(CyBle_GetState());
UART_UartPutCRLF(' ');
#endif
/* Write the Data Counter value */
writeADVcounterdata.attrHandle = CYBLE_RGB_DATA_COUNT_CHAR_HANDLE;
writeADVcounterdata.value.val = &dataADVCounter;
writeADVcounterdata.value.len = 1;
CyBle_GattcWriteWithoutResponse(cyBle_connHandle, &writeADVcounterdata);
/* Write the RGB LED Value */
writeRGBdata.attrHandle = CYBLE_RGB_LED_CONTROL_CHAR_HANDLE;
writeRGBdata.value.val = RGBData;
writeRGBdata.value.len = RGB_LED_DATA_LEN;
CyBle_GattcWriteCharacteristicValue(cyBle_connHandle, &writeRGBdata);
#endif
}
break;
case CYBLE_EVT_GATTC_DISCOVERY_COMPLETE:
/* This event is generated whenever the discovery procedure is complete*/
#ifdef ENABLE_CENTRAL_DISCOVERY
deviceConnected = TRUE;
#ifdef DEBUG_ENABLED
UART_UartPutString("CYBLE_EVT_GATTC_DISCOVERY_COMPLETE ");
SendBLEStatetoUART(CyBle_GetState());
UART_UartPutCRLF(' ');
#endif
/* Write the Data Counter value */
writeADVcounterdata.attrHandle = CYBLE_RGB_DATA_COUNT_CHAR_HANDLE;
writeADVcounterdata.value.val = &dataADVCounter;
writeADVcounterdata.value.len = 1;
CyBle_GattcWriteWithoutResponse(cyBle_connHandle, &writeADVcounterdata);
/* Write the RGB LED Value */
writeRGBdata.attrHandle = CYBLE_RGB_LED_CONTROL_CHAR_HANDLE;
writeRGBdata.value.val = RGBData;
writeRGBdata.value.len = RGB_LED_DATA_LEN;
CyBle_GattcWriteCharacteristicValue(cyBle_connHandle, &writeRGBdata);
#endif
break;
case CYBLE_EVT_GATTC_WRITE_RSP:
/* This event is generated when the Client device receives a response
* as part of the Write request sent earlier. This indicates that
* the RGB LED data was written successfully */
#ifdef DEBUG_ENABLED
UART_UartPutString("CYBLE_EVT_GATTC_WRITE_RSP ");
SendBLEStatetoUART(CyBle_GetState());
UART_UartPutCRLF(' ');
#endif
/* Disconnect the existing connection and restart scanning */
if((cyBle_connHandle.bdHandle != 0))
{
CyBle_GapDisconnect(cyBle_connHandle.bdHandle);
restartScanning = TRUE;
#ifdef DEBUG_ENABLED
UART_UartPutString("Disconnect from CYBLE_EVT_GATTC_WRITE_RSP ");
SendBLEStatetoUART(CyBle_GetState());
UART_UartPutCRLF(' ');
#endif
}
break;
case CYBLE_EVT_GAP_DEVICE_DISCONNECTED:
/* This event is generated when the device disconnects from an
* existing connection */
deviceConnected = FALSE;
#ifdef DEBUG_ENABLED
UART_UartPutString("CYBLE_EVT_GAP_DEVICE_DISCONNECTED ");
SendBLEStatetoUART(CyBle_GetState());
UART_UartPutCRLF(' ');
#endif
if((ble_gap_state == BLE_PERIPHERAL) && (switch_Role != TRUE))
{
/* If the current role of this system was Peripheral and the role
* is not to be switched, then restart advertisement */
if(CYBLE_STATE_DISCONNECTED == CyBle_GetState())
{
CyBle_GappStartAdvertisement(CYBLE_ADVERTISING_FAST);
#ifdef DEBUG_ENABLED
UART_UartPutString("Restart Advertisement ");
SendBLEStatetoUART(CyBle_GetState());
UART_UartPutCRLF(' ');
#endif
}
}
else if((ble_gap_state == BLE_CENTRAL) && (switch_Role != TRUE))
{
/* If the current role of this system was Central and the role
* is not to be switched, then restart scanning */
if(CYBLE_STATE_DISCONNECTED == CyBle_GetState())
{
CyBle_GapcStartScan(CYBLE_SCANNING_FAST);
#ifdef DEBUG_ENABLED
UART_UartPutString("Restart Scanning ");
SendBLEStatetoUART(CyBle_GetState());
UART_UartPutCRLF(' ');
#endif
}
}
break;
default:
eventParam = eventParam;
break;
}
}
void CustomEventHandler(uint32 event, void * eventParam)
{
CYBLE_GATTS_WRITE_REQ_PARAM_T *wrReqParam;
switch(event)
{
case CYBLE_EVT_STACK_ON:
case CYBLE_EVT_GAP_DEVICE_DISCONNECTED:
/* Start Advertisement and enter Discoverable mode*/
CyBle_GappStartAdvertisement(CYBLE_ADVERTISING_FAST);
break;
case CYBLE_EVT_GAPP_ADVERTISEMENT_START_STOP:
/* Set the BLE state variable to control LED status */
if(CYBLE_STATE_DISCONNECTED == CyBle_GetState())
{
/* Start Advertisement and enter Discoverable mode*/
CyBle_GappStartAdvertisement(CYBLE_ADVERTISING_FAST);
}
break;
case CYBLE_EVT_GATT_CONNECT_IND:
/* This flag is used in application to check connection status */
deviceConnected = TRUE;
break;
case CYBLE_EVT_GATT_DISCONNECT_IND:
/* Update deviceConnected flag*/
deviceConnected = FALSE;
/* Reset CapSense notification flag to prevent further notifications
* being sent to Central device after next connection. */
//sendCapSenseSliderNotifications = FALSE;
/* Reset the CCCD value to disable notifications */
//updateNotificationCCCAttribute = TRUE;
/* Reset the color coordinates */
RGBledData[RED_INDEX] = 0;
RGBledData[GREEN_INDEX] = 0;
RGBledData[BLUE_INDEX] = 0;
RGBledData[INTENSITY_INDEX] = 0;
UpdateRGBled();
break;
case CYBLE_EVT_GATTS_WRITE_REQ:
/* This event is received when Central device sends a Write command
* on an Attribute.
* We first get the attribute handle from the event parameter and
* then try to match that handle with an attribute in the database.
*/
wrReqParam = (CYBLE_GATTS_WRITE_REQ_PARAM_T *) eventParam;
/* This condition checks whether the RGB LED characteristic was
* written to by matching the attribute handle.
* If the attribute handle matches, then the value written to the
* attribute is extracted and used to drive RGB LED.
*/
/* ADD_CODE to extract the attribute handle for the RGB LED
* characteristic from the custom service data structure.
*/
//if(wrReqParam->handleValPair.attrHandle == cyBle_customs[RGB_LED_SERVICE_INDEX].\
// customServiceInfo[RGB_LED_CHAR_INDEX].customServiceCharHandle)
if(wrReqParam->handleValPair.attrHandle == cyBle_customs[CYBLE_RGB_LED_SERVICE_SERVICE_INDEX].\
customServiceInfo[CYBLE_RGB_LED_SERVICE_RGB_LED_CHARACTERISTIC_CHAR_INDEX].customServiceCharHandle)
{
/* ADD_CODE to extract the value of the attribute from
* the handle-value pair database. */
RGBledData[RED_INDEX] = wrReqParam->handleValPair.value.val[RED_INDEX];
RGBledData[GREEN_INDEX] = wrReqParam->handleValPair.value.val[GREEN_INDEX];
RGBledData[BLUE_INDEX] = wrReqParam->handleValPair.value.val[BLUE_INDEX];
RGBledData[INTENSITY_INDEX] = wrReqParam->handleValPair.value.val[INTENSITY_INDEX];
/* Update the PrISM components and the attribute for RGB LED read
* characteristics */
UpdateRGBled();
//SendVoltageMeasurementNotification(voltageReading);
}
if(wrReqParam->handleValPair.attrHandle == 0x2A00) {
RGBledData[RED_INDEX] = 0;
RGBledData[GREEN_INDEX] = 0;
RGBledData[BLUE_INDEX] = 0;
RGBledData[INTENSITY_INDEX] = 0;
/* Update the PrISM components and the attribute for RGB LED read
* characteristics */
UpdateRGBled();
}
//printf("%d",wrReqParam->handleValPair.attrHandle);
/* ADD_CODE to send the response to the write request received. */
CyBle_GattsWriteRsp(cyBle_connHandle);
break;
case CYBLE_EVT_GATTS_READ_CHAR_VAL_ACCESS_REQ:
// Is this in response to a read request?
break;
default:
break;
}
}
