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Copy pathLatencyS.erver.BLE.BL600orBT900.sb
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LatencyS.erver.BLE.BL600orBT900.sb
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// Copyright (c) 2015, Laird
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
// IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
// SPDX-License-Identifier:ISC
//
// +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// +++++ ++
// +++++ When UwTerminal downloads the app it will store it as a filenname ++
// +++++ which consists of all characters up to the first . and excluding it ++
// +++++ ++
// +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//
// BLE Latency Tester (Host): This application hosts a simple BLE server and
// forwards values written back to the client device
// as notifications to test the latency of BLE conn-
// -ections with different min/max connection
// intervals.
//
// To use: Simply run the LatencyS.erver.BLE.BL600orBT900.sb application on a
// BL600 or BT900 and put the device's Bluetooth address in the client
// files (LatencyC.lient.BLE.BL620orBT900.sb) global variable section
// (in the 'dim addr$ : addr$ = ""' line), then download and run the
// client on a BL620 or BT900 and it will automatically connect to the
// master device.
// Once connected, the minimum/maximum connection interval can be
// changed from the master device side, and enter can be pressed on the
// client device to run a single loop test.
//
//******************************************************************************
//******************************************************************************
// Definitions
//******************************************************************************
#define APP_VERSION "1.00" //Version of the application
#define PreferredMinConnInt 7500 //The default preferred minimum connection interval
#define PreferredMaxConnInt 10000 //The default preferred maximum connection interval
#define ConnIntIncrement 500 //Amount to increment/decrement the connection interval by
//******************************************************************************
// Global Variable Declarations
//******************************************************************************
dim rc //Result code variable
dim addr$ //Address of device to connect to
dim cHndl //Client handle
dim svcID //Service handle
dim charID //Characteristic handle
dim NewConnection //Set to 1 if this is a new connection
dim MinConnInt : MinConnInt = PreferredMinConnInt //
dim MaxConnInt : MaxConnInt = PreferredMaxConnInt //
dim nSuprToutUs //
dim nSlaveLatency //
dim Connected
//******************************************************************************
// Register Error Handler as early as possible
//******************************************************************************
SUB AssertRC(rc, line)
if (rc != 0) then
print "Error, rc = ";integer.h'rc;" on line ";line;"\n"
endif
ENDSUB
//==============================================================================
//Function when a BLE event occurs
//==============================================================================
FUNCTION HndlrBleMsg(nMsgId, nCtx)
dim nIntervalUs
IF (nMsgId == 0) THEN
//Connected - set preferred parameters
cHndl = nCtx
rc = BLEGETCURCONNPARMS(cHndl, nIntervalUs, nSuprToutUs, nSlaveLatency)
PRINT "Connection params: Interval = ";nIntervalUs;", Supervision timeout = ";nSuprToutUs;", Slave latency = ";nSlaveLatency;"\n"
rc = BLESETCURCONNPARMS(cHndl, MinConnInt, MaxConnInt, nSuprToutUs, nSlaveLatency)
print "Slave device connected!\n";
NewConnection = 1
Connected = 1
print "Command keys: 1) decrease minimum connection interval, 2) increase minimum connection interval, 3) decrease maximum connection interval, 4) increase maximum connection interval, 5) Renegotiate connection parameters (update)\n"
ELSEIF (nMsgId == 1) THEN
//Client disconnected, restart advertising
rc = BleAdvertStart(0, addr$, 250, 0, 0)
AssertRC(rc, 5)
Connected = 0
ELSEIF (nMsgId == 14) THEN
//Connection parameter update
rc = BLEGETCURCONNPARMS(cHndl, nIntervalUs, nSuprToutUs, nSlaveLatency)
PRINT "Connection params update: Interval = ";nIntervalUs;", Supervision timeout = ";nSuprToutUs;", Slave latency = ";nSlaveLatency;"\n"
if (nIntervalUs > 30000 && NewConnection == 1) then
//Connection parameters are high, attempt to lower them
rc = BLESETCURCONNPARMS(cHndl, MinConnInt, MaxConnInt, nSuprToutUs, nSlaveLatency)
AssertRC(rc, 6)
NewConnection = 0
endif
ENDIF
ENDFUNC 1
//==============================================================================
//Function called when a characteristic has been written
//==============================================================================
FUNCTION HndlrCharVal(charHandle, offset, len)
rc = BLECHARVALUEREAD(charHandle, addr$)
AssertRC(rc, 7)
rc = BLECHARVALUENOTIFY(charID, addr$)
AssertRC(rc, 8)
ENDFUNC 1
//==============================================================================
//Function called when a characteristic has been written
//==============================================================================
FUNCTION ResetTest()
dim TmpStr$, TmpStr2$, DoUpdate
rc = uartread(TmpStr$)
IF (Connected == 1) THEN
//Connection is active
TmpStr$ = LEFT$(TmpStr$, 1)
TmpStr2$ = "1"
IF (STRCMP(TmpStr$, TmpStr2$) == 0 && MinConnInt > 7500) THEN
//Decrease minimum connection interval
MinConnInt = MinConnInt - ConnIntIncrement
PRINT "Minimum connection interval: ";MinConnInt;"\n"
ENDIF
TmpStr2$ = "2"
IF (STRCMP(TmpStr$, TmpStr2$) == 0 && MinConnInt < 100000 && MinConnInt+ConnIntIncrement < MaxConnInt) THEN
//Increase minimum connection interval
MinConnInt = MinConnInt + ConnIntIncrement
PRINT "Minimum connection interval: ";MinConnInt;"\n"
ENDIF
TmpStr2$ = "3"
IF (STRCMP(TmpStr$, TmpStr2$) == 0 && MaxConnInt > 7500 && MaxConnInt-ConnIntIncrement > MinConnInt) THEN
//Decrease maximum connection interval
MaxConnInt = MaxConnInt - ConnIntIncrement
PRINT "Maximum connection interval: ";MaxConnInt;"\n"
ENDIF
TmpStr2$ = "4"
IF (STRCMP(TmpStr$, TmpStr2$) == 0 && MaxConnInt < 100000) THEN
//Increase maximum connection interval
MaxConnInt = MaxConnInt + ConnIntIncrement
PRINT "Maximum connection interval: ";MaxConnInt;"\n"
ENDIF
TmpStr2$ = "5"
IF (STRCMP(TmpStr$, TmpStr2$) == 0) THEN
//Renegotiate connection parameters
PRINT "Renegotiating...\n"
rc = BLESETCURCONNPARMS(cHndl, MinConnInt, MaxConnInt, nSuprToutUs, nSlaveLatency)
ENDIF
ENDIF
ENDFUNC 1
//******************************************************************************
// Equivalent to main() in C
//******************************************************************************
//Create service with one characteristic
addr$ = "a"
rc = BleServiceNew(1, BleHandleUuid16(0x180D), svcID)
AssertRC(rc, 1)
rc = BleCharNew(62, BleHandleUuid16(0x2020), BleAttrMetadata(1,1,20,1,rc), BleAttrMetadata(1,1,2,0,rc), 0)
AssertRC(rc, 2)
rc = BleCharCommit(svcID, addr$, charID)
AssertRC(rc, 3)
rc = BleServiceCommit(svcID)
AssertRC(rc, 4)
//Start advertising
rc = BleAdvertStart(0, addr$, 250, 0, 0)
AssertRC(rc, 5)
//------------------------------------------------------------------------------
// Enable synchronous event handlers
//------------------------------------------------------------------------------
ONEVENT EVBLEMSG CALL HndlrBleMsg
ONEVENT EVCHARVAL CALL HndlrCharVal
ONEVENT EVUARTRX CALL ResetTest
//------------------------------------------------------------------------------
// Wait for a synchronous event.
// An application can have multiple <WaitEvent> statements
//------------------------------------------------------------------------------
WAITEVENT