Shimmer Dock User manual

Realtime Technologies Ltd Shimmer Dock User Guide

Shimmer Dock

User Guide

Rev1.8

Realtime Technologies Ltd Shimmer Dock User Guide

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Realtime Technologies Ltd Shimmer Dock User Guide

Table of Contents

1. Shimmer Dock........................................................................................................................... 3

1.1. USB Serial Converter Driver Installation.............................................................................. 4

1.2. Placing a Shimmer in the Shimmer Dock............................................................................. 9

1.3. Charging the Shimmer...................................................................................................... 10

1.4. microSD Card Access ........................................................................................................ 11

1.5. Programming the Shimmer .............................................................................................. 11

2. Legacy ..................................................................................................................................... 11

2.1. Compatibility.................................................................................................................... 13

2.2. GPS .................................................................................................................................. 13

3. Troubleshooting...................................................................................................................... 16

USB UART drives fail to load..................................................................................................... 16

Firmware Images not listed...................................................................................................... 17

PC fails to recognise the SD card .............................................................................................. 17

The FW did not program correctly ........................................................................................... 20

Realtime Technologies Ltd Shimmer Dock User Guide

1. Shimmer Dock

The Shimmer Dock (referred to as the Dock from here on) is a multi-purpose device which can

provide three primary functions, as described in more detail throughout this section:

Charging the Shimmer

microSD Card access

Programming the Shimmer

Whilst there have been several Dock design iterations, the current Dock is the Shimmer Dock v3,

which is best identified by a square white enclosure, with a power/reset

button containing an LED

for power indication, a black user button and an LED indicator (see Figure 1-1).

Figure 1-1 Shimmer Dock –enclosure view

The different features of the Dock are summarised in Table 1-1.

Item

Shimmer2/2r

Shimmer3

Power/Reset Button1

Power-ON/Reset (quick press)

or Power-OFF (hold for 8s)

Reset (quick press)

Power/Reset Button Indicator

Solid Green when Shimmer is powered on

User Button

Application specific signal to Shimmer

Charge Indicator

Solid Yellow during primary charging state

MicroSD Indicator

Blinks Blue with host PC access to Shimmer microSD

UART Indicator

Blinks Orange during programming (BSL) or UART activity

Table 1-1 Shimmer Dock features

The Power on/off function of the Power/Reset Button applies to Shimmer2/2r only. To power on/off a

Shimmer3, the slide switch on the device must be used.

LED Indicator

Power/Reset Button

User Button

Mini USB

Shimmer Connector

Realtime Technologies Ltd Shimmer Dock User Guide

Internally, the Dock also contains a DIP switch, which is used to ensure compatibility with legacy

devices. Your Dock will ship in the appropriate configuration for the version of Shimmer hardware

that you have ordered. However, if you want to change the configuration to use it with a different

hardware version, you may do so by opening the Dock enclosure. This involves removing the black

rubber feet from the underside of the Dock to reveal four screws which should be removed before

opening the plastic.

The valid DIP switch configuration options are listed in Table 1-2 and illustrated in Figure 1-2. Users

of Shimmer3 should not change the configuration from that recommended below. Users of

Shimmer2/2r should use the “legacy configuration” for most purposes (e.g. programming firmware

and SD card access). In the event that problems are encountered accessing the SD card for

Shimmer2/2r, which can occasionally occur due to driver incompatibility issues on certain PCs, the

“SD card access only” configuration should be used. Note that in this configuration, programming of

the Shimmer is not possible.

Function

Switch 1

Switch 2

Switch 3

Switch 4

Shimmer3 recommended configuration

Shimmer2/2r legacy configuration

Shimmer2/2r SD card access only

Table 1-2 Shimmer Dock DIP switch configuration options

Figure 1-2 DIP switch configuration: Shimmer3 (left), Shimmer2/2r legacy (centre), Shimmer2/2r SD

card access only (right)

The Dock connects to a PC via a USB cable. Whilst drivers for the microSD Card Access should already

exist on your PC, you will need to manually install USB Serial Converter drivers to use the Dock for

programming the Shimmer. You should perform the installation of these drivers before you first

connect your Dock to the PC.

Warning: If you connect the Dock to a PC do not allow windows to install the driver automatically.

1.1. USB Serial Converter Driver Installation

1. The USB Serial Converter drivers for the Programming Dock can be downloaded from the FTDI

Chip Drivers webpage (see Figure 1-3). Download and install the driver to match your operating

system.

Realtime Technologies Ltd Shimmer Dock User Guide

Figure 1-3 USB Serial Converter Driver Download

2. Connect the Dock with a powered USB Port of your PC.

3. Verify your system settings:

I. From the Control Panel, select Device Manager (in Windows this is found from Control Panel

→ System → Hardware → Device Manager or by typing devmgmt.msc in the Start menu) and

expand the Universal Serial Bus controllers entry as shown in Figure 1-4.

II. You should see at least two entries for USB Serial Converter (the other entries will vary with

system configuration and may not match the image above exactly).

Realtime Technologies Ltd Shimmer Dock User Guide

Figure 1-4 Device Manager showing USB Serial Converter A and B

III. Double-click on each USB Serial Converter entry and under the General tab, confirm that the

manufacturer is FTDI. Then, under the Advanced tab, make sure the Load VCP checkbox is

ticked (see Figure 1-5). If the checkbox isn't ticked, you will need to tick for each Serial

converter and then unplug and re-insert the Dock.

Realtime Technologies Ltd Shimmer Dock User Guide

Figure 1-5 USB Serial Converter Properties

IV. Next, under the Ports (COM & LPT) entry in the Device Manager, you should see two new

USB Serial Port entries, each with an associated COM port number, as shown in Figure 1-6.

Realtime Technologies Ltd Shimmer Dock User Guide

Figure 1-6 Device Manager showing Dock USB Serial Ports

V. Double-click on each of these USB Serial Port entries and, under the Port Settings tab, click

on Advanced...in the Miscellaneous Options at the bottom right-hand side of the window,

ensure that Set RTS On Close is ticked, as shown in Figure 1-7.

Realtime Technologies Ltd Shimmer Dock User Guide

Figure 1-7 Advanced Port Settings: Select Set RTS On Close

1.2. Placing a Shimmer in the Shimmer Dock

The Dock connects to the Shimmer via the External Connector. The External Connector is keyed and

does not require force to insert. Insert the Shimmer with the Bluetooth ID label facing away from the

USB cable.

Warning: Forcing the connector may cause permanent damage to your Shimmer.

When the Shimmer is placed in the Dock, the green LED on the Power/Reset button on the dock will

light up green if the Shimmer is powered on. If it does not light up then one of the following may

have occurred:

Shimmer unit may be powered off.

Shimmer unit may not be inserted properly.

The Dock may not be powered via the USB cable.

Ensure that the Shimmer unit is inserted properly and that the programming dock is powered via the

USB cable. For the Shimmer2/2r, pressing the Power/Reset button on the dock or the reset button

on the Shimmer unit will power on the device. For Shimmer3, use the slide-switch on the side of the

device to ensure that it is powered on.

Realtime Technologies Ltd Shimmer Dock User Guide

1.3. Charging the Shimmer

In order to use the Dock as a charging device, simply connect the USB cable of the Dock to a

powered USB socket and insert the Shimmer unit into the Dock.

Note: You should make sure your Dock is powered when a Shimmer is docked as the Shimmer

battery will discharge if it is left idle in a Dock that is not powered.

The state of the charge indicator LED is an indication of charge phase for the battery. There are three

phases to Shimmer battery charging, illustrated in Figure 1-8. The background colour on the graph in

Figure 1-8 indicates the colour of the charge indicator LED on the Dock during each phase.

Phase 1 is a Preconditioning Phase and is only required when the battery voltage has dropped below

a minimum threshold. The battery voltage should not drop below this minimum threshold with

normal everyday use however if a Shimmer is left idle for a long period of time the battery may self-

discharge to a voltage below the minimum threshold. During the Preconditioning Phase a low

current (12.5mA) is applied to bring the voltage to the Minimum Charge Voltage. The length of pre-

conditioning will depend on the extent to which battery is discharged. For example a Shimmer that

has been unused for months and was stored discharged may have a lengthy pre-conditioning phase.

For the most efficient recharging after a deep discharge, it is recommended to program the Shimmer

unit with the Sleep firmware image. During the Preconditioning Phase the charge indicator LED on

the Dock will be off.

Figure 1-8 Shimmer Battery Charging Phases. The background colour on the graph indicates the

colour of the charge indicator LED on the Dock during this phase.

Phase 2 is the Primary Charging Phase. This phase is the standard charging phase and involves the

application of a constant current (125mA) to bring the battery voltage to the Regulation Voltage

level. During this phase the charge indicator LED on the Dock will illuminate yellow.

Realtime Technologies Ltd Shimmer Dock User Guide

Phase 3 is the Conditioning Phase. The charger will continue to condition the battery while the

Shimmer remains inserted in the charger. For maximum operating life allow as much conditioning

time as your needs allow. During this Phase the charge indicator LED on the Dock will mostly be off.

Depending on the firmware image that is programmed on the device, the charge indicator LED may

intermittently light up. This is because a heavy load may momentarily bring the battery voltage

below the threshold for the Conditioning Phase, causing the Primary Charging Phase to be re-

entered.

The duration of primary charging for a standard Shimmer battery (3.7V - 450mAh) is typically 4.5

hours. As the Shimmer charges at 125mA/hr and conditions at 12.5mA/hr it is possible to estimate

charge times for larger or smaller batteries. The charger has a 7hr time-out. Users using >800mAh

capacity rechargeable batteries need to increase the charge rate on the Shimmer mainboard to

ensure a full charge, please contact support@shimmersensing.com for further details.

1.4. microSD Card Access

When a Shimmer with microSD card is inserted into a Dock that is connected to a PC, the standard

drivers on the host system should mount the microSD card as though it were a USB flash key.

Depending on the specifics of your system, a few things may happen:

A window may open to display the contents of the Shimmer's flash

A prompt window may pop-up and ask you what you want to do

Nothing may happen, but when you click on the drive letter or volume name associated with

the USB port of the USB Dock, the contents of the Shimmer flash may be browsed.

There are a few requirements for this interaction to work:

1. The Shimmer must be powered.

2. Your SD card must have a compatible format (FAT file system is the only currently supported

method for Shimmer Applications). If this isn't the case, you may be prompted to reformat

the card. Be careful –irreversible data loss will occur! Otherwise a binary/raw disk utility

(such as DD) must be used to copy or access data.

3. Some Shimmer applications may block this ability or limit mounting to specific times during

operation due to legacy compatibility issues, or pending disk operations on Shimmer. This

will result in a blinking blue LED on the Dock followed by a time-out from the HOST, or a blue

LED on the Dock that turns off (media is detected but fails OS poll). You can try to re-insert

the Shimmer, inspect the code, or contact the developer.

1.5. Programming the Shimmer 3

To program a Shimmer, you need a Shimmer Dock or a Consensys Base and must have previously

completed the Internally, the Dock also contains a DIP switch, which is used to ensure compatibility

with legacy devices. Your Dock will ship in the appropriate configuration for the version of Shimmer

hardware that you have ordered. However, if you want to change the configuration to use it with a

different hardware version, you may do so by opening the Dock enclosure. This involves removing

the black rubber feet from the underside of the Dock to reveal four screws which should be removed

before opening the plastic.

Realtime Technologies Ltd Shimmer Dock User Guide

The valid DIP switch configuration options are listed in Table 1-2 and illustrated in Figure 1-2. Users

of Shimmer3 should not change the configuration from that recommended below. Users of

Shimmer2/2r should use the “legacy configuration” for most purposes (e.g. programming firmware

and SD card access). In the event that problems are encountered accessing the SD card for

Shimmer2/2r, which can occasionally occur due to driver incompatibility issues on certain PCs, the

“SD card access only” configuration should be used. Note that in this configuration, programming of

the Shimmer is not possible.

Function

Switch 1

Switch 2

Switch 3

Switch 4

Shimmer3 recommended configuration

Shimmer2/2r legacy configuration

Shimmer2/2r SD card access only

Table 1-2 Shimmer Dock DIP switch configuration options

Figure 1-2 DIP switch configuration: Shimmer3 (left), Shimmer2/2r legacy (centre), Shimmer2/2r SD

card access only (right)

The Dock connects to a PC via a USB cable. Whilst drivers for the microSD Card Access should already

exist on your PC, you will need to manually install USB Serial Converter drivers to use the Dock for

programming the Shimmer. You should perform the installation of these drivers before you first

connect your Dock to the PC.

Warning: If you connect the Dock to a PC do not allow windows to install the driver automatically.

USB Serial Converter Driver Installation procedure outlined earlier in section 0 of this document.

Two methods for programming your device are outlined below; choose the one most suited to your

configuration and preference.

1.5.1. Programming in Windows using Consenys

The Consensys application can be used in Windows to program the Shimmer with pre-compiled

firmware images. The Consensys is available from the Shimmer User Resources or for download from

http://www.shimmersensing.com.

Realtime Technologies Ltd Shimmer Dock User Guide

Programming firmware onto a Shimmer using Consensys is a four step process:

1. Launch Consensys and select the MANAGE DEVICES tab.

2. Insert your Shimmer (ensure it’s powered on) into a Dock or Consensys Base; select the

Shimmer from AVAILABLE SHIMMERS table or from the HARDWARE VISUALISATION graphic and

then press the FIRMWARE button.

3. Select one of Shimmer’s precompiled firmware images provided on the QUICK tab or you

may choose to load a firmware image (a file with a .txt extension) from your PC into

Consensys on the OTHER tab. Press the PROGRAM button to start programming the

Shimmer with the selected firmware.

4. Progress indicators highlight the status of the firmware programming. When programming is

complete, the progress bar will be filled to 100% and the DONE button will be enabled. See

expected Shimmer LED behaviour for provided firmware images In section Error! Reference

source not found..

2. Legacy

2.1. Compatibility

The previous version of the Shimmer Dock (v2.1) can be identified by the two LED indicators –one

for MicroSD/UART activity and the other for charge indication, as shown in Figure 2-1. It should be

noted that this version of the Dock is not fully compatible with Shimmer3. The charge indicator will

not light for Shimmer3 and SD card access through the dock will not work on some PCs.

Figure 1-9 Shimmer3 firmware programming using Consensys

Realtime Technologies Ltd Shimmer Dock User Guide

It should also be noted that the Shimmer Dock (v2.1) (and previous versions) do not contain the DIP

switches that are present on Shimmer Dock v3 to change the configuration of the Dock.

Figure 2-1 Shimmer Programming Dock v2.1

2.2. GPS

A previous version of the Shimmer Dock (v2.0) included GPS capability. This section only applies to

versions of the Dock with GPS capability (evident from the presence of a GPS button as in Figure

2-2).

Figure 2-2 Shimmer Programming Dock v2.0

The GPS Enable button is used to switch between GPS and host computer UART functionality. In GPS

mode, the indicator on the button will blink green while GPS location is being acquired. The indicator

GPS Button

MicroSD Indicator/

UART Indicator

Charge Indicator

Realtime Technologies Ltd Shimmer Dock User Guide

will turn solid after a lock is reached. This requires a clear view of the sky or placement on a

windowsill or ledge.

The GPS module will transmit serial GPS NMEA sentences to the docked Shimmer's external

connector UART lines. This data can be used for application synchronization or localization.

Configuration commands use the MTK NMEA format. For more information on the commands, data

format and operational parameters of the GPS module see the Shimmer GPS/PRES User Guide

available at www.shimmersensing.com in downloads.

Toggling GPS Enable so that the indicator is off will select UART functionality. The UART lines will

now pass through to the USB UART on the host computer. In this mode, operation matches the

previous Shimmer Dock accessories. A common UART indicator is used for both the host UART, and

the BSL programming interface UART. Beyond the indicator difference, the UART mode behaves like

legacy USBREADER or USB Dual UART docks.

While the Dock has a memory retention feature for GPS almanac data, after a period of inactivity, or

geographic movement, initialization of GPS almanac data may take up to an hour. Without a clear

sky-view, data output from the GPS module will be incomplete. This condition is indicated by a

persistent blinking GPS indicator or blank fields in output data. When confronted with scenario try a

different location. In some indoor cases, insufficient sky-view, RF blocking building materials, or

shadows from adjacent structures will limit GPS functionality.

Note: Some example Shimmer applications may operate differently or unpredictably when the GPS

mode is selected.

2.3. Programming the Shimmer 2r

This section deals with programming the Shimmer with pre-compiled Firmware images. For details

on modifying Firmware please refer to the Firmware section of the Shimmer User Manual.

A Bootstrap Loader application is used in Windows to program the Shimmer 2/2r with pre-compiled

firmware images. Bootstrap Loader applications are available from the Shimmer 2r User Resources.

You should copy the application folder to a suitable location on your PC. The application does not

require installation.

For the application to function correctly you must have previously completed the USB Serial

Converter Driver Installation procedure outlined earlier in this document. For Shimmer2/2r: When

you run BSL430, the application will automatically attempt to detect the serial port associated with

the Dock, this will be indicated by the COMxx entry in the port tab (illustrated in Error! Reference

source not found.) where xx is the serial port number. If no port is displayed, try pressing the

Reload COM ports button. If that fails, first check the cable, then revisit the USB Serial Converter

Driver Installation procedure outlined earlier in this document.

Realtime Technologies Ltd Shimmer Dock User Guide

Figure 2-3 BSL430 Programming application

When you run BSL430, the application will automatically attempt to detect the serial port associated

with the Dock, this will be indicated by the COMxx entry in the port tab (illustrated in Error!

Reference source not found.) where xx is the serial port number. If no port is displayed, try pressing

the Reload COM ports button. If that fails, first check the cable, then revisit the USB Serial Converter

Driver Installation procedure outlined earlier in this document.

The BSL430 application includes a number of precompiled Firmware images - usually a file with an

.ihex extension. You may choose to load one of the provided images or, alternatively, tick the "Select

by file name" checkbox and browse to the location of the image on your PC.

If you choose one of the provided images (by leaving the "Select by file name" checkbox unchecked),

it is very important that the chosen image matches the target platform (Shimmer1, Shimmer2,

Shimmer2r or Span) or unpredictable behaviour may occur; the "Please select bootstrap set:" drop-

down menu can be used to select the correct set of images. Next, use the scroll bar and selection

tabs to browse and select a firmware image from among the available options. If you do not see a

list of firmware images please consult the Firmware Images not listed section.

As a test case we will program the Shimmer with the Blink firmware:

1. Select either the Blink_shimmer2r.ihex or Blink_shimmer2.ihex file (depending on your

Shimmer version) and press the Program Button.

Firmware

Images Panel

Realtime Technologies Ltd Shimmer Dock User Guide

2. A Windows such as that illustrated in Error! Reference source not found. should pop up. In

addition, the UART Indicator light on the Dock will flash. Depending on the program size, it

may take up to five minutes to program a Shimmer, but blink is quite small and the firmware

update should complete quickly.

Figure 2-4 BSL430 Programming

3. The LEDs on your Shimmer should be blinking- congratulations you have programmed your

Shimmer! If you experience difficulty, verify that your Shimmer is powered on and the

correct programming port COM port is selected then try again.

3. Troubleshooting

USB UART drives fail to load

There is no COM Port listed in the COM Port tab in the BSL430 application

Occasionally the USB UART drivers will fail to load. This condition typically happens when the Dock

has been unplugged and is often indicated by a solid UART activity LED. The simple fix is to unplug

the USB cable and retry. If this process fails to remedy the situation, please contact Shimmer

Research support for assistance.

Firmware Images not listed

There are no firmware images listed in Firmware Images Panel in the BSL430 application.

Firstly make sure that the Select by file name option is NOT ticked. Also make sure that you have

selected the correct bootstrap set for your platform using the Please select bootstrap set option (e.g.

Shimmer2r samples). If that fails to rectify the problem be aware that the folder structure for the

BSL430 application has to be maintained. You may have changed the structure by moving the

Realtime Technologies Ltd Shimmer Dock User Guide

location of bsl430.exe with respect to the bootstraps folder or vice versa. Ensure that the folder

structure is in its original format as in Figure 3-1

Figure 3-1 BSL430 folder structure

PC fails to recognise the SD card

I have inserted an SD card into my Shimmer unit but the PC fails to recognise it when I view the list

of Devices with Removable Storage as in Figure 3-2.

Try one or more of the suggested options below to attempt to resolve the problem.

1. Make sure that the Shimmer Dock drivers installed correctly.

2. Power off and power on your Shimmer unit.

3. Unplug and re-plug the Shimmer Dock.

Figure 3-2 Shimmer SD Card NOT detected by PC

Shimmer SD card NOT

detected by PC

Realtime Technologies Ltd Shimmer Dock User Guide

Figure 3-3 Shimmer SD Card detected by PC

On certain PCs, users of the Shimmer2/2r and the Shimmer Dock v2.1 (and earlier) may experience

SD card access problems, due to Windows drivers causing a race condition, which means that the SD

card control is not correctly handed over from the Shimmer to the PC. This problem has been

rectified in Shimmer Dock v3. The problem can be characterised by the symptoms described above

(Shimmer SD card not detected by PC) or by one of the following:

1. SD card needs to be formatted:

oThe PC pops up a warning message telling the user that the SD card needs to be

formatted.

oWhen the user says “Yes” to formatting the SD card, the format operation fails.

2. SD card detected but files not accessible:

oThe SD card appears to be detected and shows up as a Removable Disk in My

Computer.

oWhen the user attempts to open directories or files, an error occurs and the SD card

subsequently appears not to be detected by the PC.

If this occurs, you should attempt the following steps:

Powercycle the Shimmer on the Dock (long press of dock reset button, followed by short

press of the Reset button on the Dock).

Remove the Shimmer from the Dock.

Unplug the USB connection between the PC and the Dock.

Reconnect the USB connection between the PC and the Dock.

Check that the Dock driver settings are correct, according to Section 1.1 of this User Guide.

Replace the Shimmer on the Dock and ensure that it is powered on.

If these troubleshooting steps fail to resolve the problem with Shimmer2/2r and Shimmer Dock, you

should consider purchasing the latest release of the Shimmer Dock. This Dock should be configured

for Shimmer2/2r SD card access only (see Section 1 of this document for details).

Shimmer SD card

detected by PC

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