Firmware Upgrade - Laird Technologies
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1. It is also possible to upgrade the firmware over a SPI bus interface which is exposed via four dedicated pins on the module labelled as SPI_CSB SPI_MISO SPI_LMOSI and SP_CLK See the user manual for full pinout Upgrading firmware over the air is not planned as it is not inherently supported by the chipset vendor New firmware is deployed in files with extension dfu which are self contained with all the necessary information to expedite a firmware upgrade This document describes measures a designer can take to make the process of upgrading the firmware easier based on understanding the various options Upgrading firmware on a Development Kit The BTM44x module on a dev kit has its UART exposed directly to a Windows PC via a USB virtual COM port In this case the process of upgrading the firmware is as simple as launching a utility called Btm44xConfig exe in interactive mode and pointing it to the new firmware file with a dfu extension The main window for the firmware upgrade utility is as per the snapshot below Americas 1 800 492 2320 Option 3 1 Laird Technologies Europe 44 1628 858 940 Hong Kong 852 2923 0610 www lairdtech com wireless BTM44X Firmware Upgrade Application Note J 8tm44x Config Utility v0 30 Leaders in Wireless Systems COM 1 255 Protocol Ee Stop Bits 0 Start With AT 115200 115200 v pre vii i 2 pgrade Fil Exit With AT 115200 None ah re Change the COM port2. as per the setting in the PC for the dev kit specify the protocol and COM port parameters for Start With and Exit With select the filename in the appropriate text box which may be automatically selected if there is only one dfu file in the same folder as the utility and then click Upgrade The whole process takes up to 5 minutes On successful upgrade the module will be left in the state specified by the parameters labelled as Exit With If the upgrade process was previously aborted i e via a power interruption the module starts in BCSP boot loader mode The utility is designed to detect for that state if the Start With parameters do not yield a response from the module It will check for BCSP mode and if that results in a positive detection it will download the new firmware It may try to exit with the parameters specified in Exit With That final phase may fail If so manually try to detect the module by trying MP and AT modes at 115200 and 9600 baud The firmware upgrade utility can operate in automatic mode by supplying relevant parameters as command line arguments For example if the kit is on COM34 the new firmware file is called NewFirmware dfu and the module is in AT mode but must exit in MP mode then the command line arguments will be COM 34 DFU NewFirmware dfu PROTS AT BAUDS 115200 PARS NONE STOPs 1 PROTe MP BAUDe 115200 PARe NONE STOPe 1 UPGRADE If the utility is launched with these argum
3. Laird gt BTM44X Firmware Upgrade Application Note v1 0 Introduction The BTM44x Enhanced Data module has a feature set in firmware which is continually evolving At any time the module has a specific production release of the firmware At the same time on application newer engineering builds of the firmware can be made available These are released to fix issues that have been discovered since the production release or have new profiles and features The module is available so that one of two interfacing protocols can be activated over the UART port One is the multipoint packet protocol MP mode and the other is the AT protocol In AT mode the firmware version information is sent in response to the ATi3 command In MP mode the firmware version information is sent in response to the CMD_INFORMATION 0 command Upgrading firmware over the UART consists of temporarily changing the protocol to one which is used by the boot loader is packet based and is specific to the upgrade process called BCSP mode It is not documented in the user manual given that it is only used for upgrades and that process is managed via PC based utilities so it is normally transparent to a host The only time this protocol is exposed to the host is when an upgrade is interrupted and the module has incomplete firmware In that case the boot loader detects corrupt firmware and remains in boot mode exposing BCSP mode to allow further attempts at firmware downloads
4. d Technologies whether such damages be direct indirect consequential special or otherwise and whether such damages are incurred by the person to whom this warranty extends or third party If after inspection Laird Technologies determines that there is a defect Laird Technologies will repair or replace the OEM transceiver at their discretion If the product is replaced it may be a new or refurbished product Americas 1 800 492 2320 Option 3 5 Laird Technologies Europe 44 1628 858 940 Hong Kong 852 2923 0610 www lairdtech com wireless
5. e MP command CMD_WRITE_SREG 11 Read content of S register 242 and store for later use using command CMD_READ_SREG 12 Write 1 to S register 242 OxF2 using the MP command CMD_WRITE_SREG 13 Read content of S register 243 and store for later use using command CMD_READ_SREG 14 Write O to S register 243 OxF3 using the MP command CMD_WRITE_SREG 15 Write 2 to S register 255 OxFF using the MP command CMD_WRITE_SREG 16 Send command CMD_RESET The module wakes in AT mode at 115200 N 8 1 17 Configure the host microcontroller UART for 115200 N 8 1 operation and AT protocol 18 Send command ATS32767 lt cr gt and store the returned decimal value in the range 0 to 255 19 Send command ATS32767 n lt cr gt where n is the decimal value returned in step 12 20 Send command AT BT lt del gt lt cr gt where lt del gt is the 0x08 ASCII character 21 The module is in BCSP mode and sends BCSP sync packets at 115200 N 8 1 The host can verify this by looking for at least one 5 byte sequence CO 01 OB 09 90 22 Activate the bridge From here on all traffic is bridged across bidirectionally 23 Launch the firmware upgrade utility on the Windows PC 24 While the bridge is active restart a 40 second timer as long as there is data traffic from the PC towards the BT module 25 If the timer expires this signals that the firmware upgrade is complete Disable the bridge 26 Reset the BT module by either toggling the hardware RESET line o
6. ents it starts and exits on completion without further intervention If the upgrade process fails a log file which is always offers full trace information to diagnose the failure Upgrading firmware on Host Hardware In real world applications the UART interface of the BTM44x module will be most likely directly connected to the UART port of a host CPU which is managing the module and the UART signals of the module are not exposed to allow a Windows PC to use the Btm44xConfig utility to upgrade the firmware In this scenario it is not possible to upgrade the firmware However it is possible to augment the host module hardware design to expedite a firmware upgrade There are several options available and they are described in subsequent sections of this document Americas 1 800 492 2320 Option 3 2 Laird Technologies Europe 44 1628 858 940 Hong Kong 852 2923 0610 www lairdtech com wireless BTM44X Firmware Upgrade Application Note Option 1 Multiplex the UART lines This upgrade option requires direct connection to RX TX CTS and RTS lines of the module via appropriate RS232 level conversion to a serial port on a Windows PC In that case 2 of the 4 UART lines of the module cannot be directly exposed because the RX and CTS input lines will be driven by the host microcontroller and hence cannot also be driven by a Windows PC One solution would be to incorporate the hardware logic illustrated below and use a USB to Serial ada
7. ey com 1 parts 1406287 converter usb spi devsys 1808 1a html The five pins to make available for external connection to the USB to SPI adapter are GND Pin 7 SPI CSB Pin 8 SPI MISO Pin 9 SPI MOSI Pin 10 SPI CLK Pin 11 The USB to SPI bus adapter documentation describes the RJ45 socket pinout enabling an appropriate cable to be made up from an existing network patch cable REVISION HISTORY 1 0 24 Nov 2011 Initial Release Jonathan Kaye Copyright 2013 Laird Technologies Inc All rights reserved The information contained in this manual and the accompanying software programs are copyrighted and all rights are reserved by Laird Technologies Inc Laird Technologies Inc reserves the right to make periodic modifications of this product without obligation to notify any person or entity of such revision Copying duplicating selling or otherwise distributing any part of this product or accompanying documentation software without the prior consent of an authorized representative of Laird Technologies Inc is strictly prohibited All brands and product names in this publication are registered trademarks or trademarks of their respective holders Information furnished by Laird Technologies in this specification is believed to be accurate Devices sold by Laird Technologies are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only Laird Technologies makes no warranty express statut
8. f the module or by sending a BREAK for about 500 milliseconds 27 The BT module wakes in AT Mode at 115200 N 8 1 28 Write to S Reg 520 the value returned in either step 2 or 9 29 Write to S Reg 522 the value returned in either step 4 or 11 30 Write to S Reg 523 the value returned in either step 6 or 13 31 If the module was in MP mode at step 1 send command ATS9255 1 32 Reset the BT module by either toggling the hardware RESET line of the module or by sending a BREAK for about 500 milliseconds 33 The module is now in the same mode and state as at step 1 but with new firmware installed 0 OY OT e W Bo Americas 1 800 492 2320 Option 3 4 Laird Technologies Europe 44 1628 858 940 Hong Kong 852 2923 0610 www lairdtech com wireless BTM44X Firmware Upgrade Application Note Option 3 Upgrade via SPI bus This option requires that the five pins on the BT module be exposed via appropriate means so that a Windows PC connected by USB to SPI bus adapter may run a utility and upgrade the firmware This is NOT Btm44xConfig exe used previously Instead the firmware upgrade file consists of a pair of files one with a xdv extension and the other with xpv These files are not made generally available but will be available to customers on application who are willing to sign an NDA with Laird so that a third party utility can be made available The USB to SPI bus adapter can be purchased online e g http parts digik
9. ory and implied or by description regarding the information set forth herein Laird Technologies reserves the right to change specifications at any time and without notice Laird Technologies products are intended for use in normal commercial and industrial applications Applications re quiring unusual environmental requirements such as military medical life support or life sustaining equipment are specifically not recommended without additional testing for such application Limited Warranty Disclaimer Limitation of Liability For a period of one 1 year from the date of purchase by the OEM customer Laird Technologies warrants the OEM transceiver against defects in materials and workmanship Laird Technologies will not honor this warranty and this warranty will be automatically void if there has been any 1 tampering signs of tampering 2 repair or attempt to repair by anyone other than an Laird Technologies authorized technician This warranty does not cover and Laird Technologies will not be liable for any damage or failure caused by misuse abuse acts of God accidents electrical irregularity or other causes beyond Laird Technologies control or claim by other than the original purchaser In no event shall Laird Technologies be responsible or liable for any damages arising From the use of product From the loss of use revenue or profit of the product or As a result of any event circumstance action or abuse beyond the control of Lair
10. pter as described at the website http www ftdichip com Products Cables USBTTLSerial htm This has the further advantage of not requiring RS232 level conversion Microcontroller F W Conn 6 way In this arrangement the extra cost to the bill of materials consists of components that implement the multiplexing of the RX and CTS lines This multiplexing can be via a header jumper arrangement or it can be logic gates driven by the Vcc line of the 6 way USB FW Conn that allows the USB to Serial adapter to gain control of the BT module Module This line is used to controlthe two switches so that when the USB adapter is connected the supplied Vcc will connect the RX and CTS lines over to the PC With this arrangement while the external PC is interacting with the BT module any outgoing comms traffic will also reach the host microcontroller This does not detrimentally affect the operation of the controller If this could be an issue we advise you also multiplex the TX line from the modules The host controller may also sense the Vcc line from the F W Conn to provide logic to ignore UART traffic when it is asserted Option 2 Bridge UART traffic This upgrade option requires that the host controller has permanent connections to the UART port of the BT module AND has some other means of communicating with the outside world a TCP IP connection or a second UART port exposed so that a Windows PC has direct connection Ame
11. ricas 1 800 492 2320 Option 3 3 Laird Technologies Europe 44 1628 858 940 Hong Kong 852 2923 0610 www lairdtech com wireless BTM44X Firmware Upgrade Application Note If a TCP IP connection is the other means of connection you will need a windows PC with TCP IP to virtual COM port bridge software an example http www tacticalsoftware com products serialip index htm This TCP IP to Serial port bridge is required to use Btm44xConfig exe The host microcontroller which controls the bridge for the UART traffic must have firmware functionality to prepare the BT module for a firmware upgrade When triggered the firmware must revert the module to BCSP boot loader mode and then bridge all bidirectional traffic between the BT module and the Windows PG When the host controller is triggered it shall perform the following actions where lt cr gt implies the carriage return character OxOD and lt del gt is the backspace character 0x08 If the BT module is in MP mode go to step 9 Send command ATS520 and store the returned value for later use Send command ATS520 115200 lt cr gt Send command ATS522 and store the returned value for later use Send command ATS522 1 lt cr gt Send command ATS523 and store the returned value for later use Send command ATS523 0 lt cr gt Advance to step 16 9 Read content of S register 240 and store for later use using command CMD_READ_SREG 10 Write 115200 to S register 240 OxFO using th
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