FPC BM-Lite User manual

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BM-Lite Development Kit
Getting Started Guide

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Contents
1Introduction............................................................................................3
2Development Kit Hardware ....................................................................4
2.1 BM-Lite Module ...............................................................................................................4
2.2 BM-Lite Adapter Flex Cable .............................................................................................6
2.3 FPC5924 Adapter Board...................................................................................................6
2.4 FPC5832 FTDI USB Adapter..............................................................................................8
3Setup on Linux – Ubuntu 16.04 ..............................................................9
3.1 Install Python3 .................................................................................................................9
3.2 Install the required packages...........................................................................................9
3.3 Run reference Python Script to test the BM-Lite...........................................................10
4Setup on Windows 7/10 .......................................................................13
4.1 Install Python3 ...............................................................................................................13
4.2 Install the required packages.........................................................................................14
4.3 Installing an SPI filter for the FTDI board. ......................................................................15
4.4 Run reference Python Script to test the BM-Lite...........................................................17
5How to use the Python script ‘bep_ref.py’ ...........................................20
5.1 Arguments for running bep_ref.py ................................................................................20
5.2 SPI Startup example.......................................................................................................20
5.3 UART Startup example...................................................................................................20
5.4 Example procedures ......................................................................................................20

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1Introduction
Welcome to the BM-Lite Getting Started Guide for the FPC BM-Lite Development Kit. This
document will take you through the necessary steps for setting up your FPC BM-Lite
Development kit to interface with your PC.
Included in your FPC BM-Lite Development Kit should be the following hardware:
1 BM-Lite module (Part number: 100018754)
1 FPC5832 FTDI USB Adapter (Part number: 100015089)
1 FPC5924 adapter board (Part number: 100015050)
1 BM-Lite adapter flex cable (Part number: 100020709)
You should also have the following documentation and software:
BM-Lite Product Specification and Integration Guideline (Doc. number: 100020596)
Reference source code for host implementation (Doc. number: 100020845)
Reference Python scripts for host interface (Doc. number: 100020846)
This guide takes you through the steps to setup your FPC BM-Lite Development Kit on Linux
and Windows. The development kit should be fairly OS agnostic but the operating systems that
have been verified and are recommended are:
Ubuntu 16.04
Windows 7
Windows 10

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2Development Kit Hardware
2.1 BM-Lite Module
BM-Lite module (Part number: 100018754)
The BM-Lite module has a standard 10 pin 0.5 mm pitch Flat Flex Connector as main interface.
The pin-out is described in the table below.
Pin
number
Signal
Name
Function
Description
Min.
Voltage
[V]
Max.
Voltage
[V]
Max.
frequency
[MHz]
1
GND
Supply
GND pin
0
0
DC
2
SPICLK
Digital in
Serial clock used for SPI
GND
3.6
20
3
MISO
Digital out
The SPI Serial tri-state output which is
enabled with CS_N low
GND
3.6
SPICLK
4
MOSI
Digital in
The SPI Serial data Input
GND
3.6
SPICLK
5
CS_N
Digital in
Chip Select active when low
GND
3.6
~0
6
IRQ
Digital out
Interrupt request output (SPI only)
GND
3.6
~0
7
RST_N
Digital in
Reset module. Active low*.
GND
3.6
~0
8
UART_RX
Digital in
UART receive data pin
GND
3.6
921600** (Baud)
9
UART_TX
Digital out
UART transmit data pin
GND
3.6
921600** (Baud)
10
VDDIO
Supply
Core supply voltage. Typical 3.3V
3.0
3.6
DC
BM-Lite interface
* Keep low at least 20µs to reset whole module
**Default baud rate is 115200
BM-Lite FFC connector. Pin 1 is to the left.
BM-Lite supports both UART and SPI interfaces. Both interfaces are enabled at power-on, but
only one of them can be used at the same time. BM-Lite will auto detect which interface is
being used by detecting data traffic. It is therefore important that the input signals for the
unused interface are pulled into a fixed state to avoid interference.
2.1.1 SPI Interface
When using the SPI interface, the UART RX signal should be held at a fixed state to avoid
unintentional interference on the UART interface.

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Example schematic of BM-Lite interface using SPI
The SPI communication and commands are described in the BM-Lite Product description.
2.1.2 UART Interface
When using the UART interface, the SPI CS signal should be held pulled up to avoid
unintentional interference on the SPI interface.
Schematic of BM-Lite interface using UART

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2.2 BM-Lite Adapter Flex Cable
BM-Lite adapter flex cable (Part number: 100020709)
The BM-Lite Adapter Flex Cable supports the SPI interface only. It does not have the UART TX
signal connected. The UART RX is connected to Ground.
To use UART a regular flex cable and can be used. This is not included in the BM-Lite package.
2.3 FPC5924 Adapter Board
FPC5924 adapter board (Part number: 100015050)
The FPC5924 Adapter Board is a breakout board for the BM-Lite Adapter Flex Cable.
Showing how the BM-Lite Flex Cable should be mounted on the FPC5924 board.
1
3
5
2
4
6
1
3
5
2
4
6
CN1
CN2 CN3
Pinout of the FPC5924 breakout board.

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Pin
BM Lite
pin
Function
Comment
CN2: 1
5
CS_N
CN2: 2
3
MISO
CN2: 3
7
RST
CN2: 4
4
MOSI
CN2: 5
6
IRQ
CN2: 6
2
SPI_CLK
CN3: 1
-
Not connected
CN3: 2
-
Not connected
CN3: 3
-
VDD
CN3: 4
-
Not connected
CN3: 5
-
Not connected
CN3: 6
1, 8
GND

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2.4 FPC5832 FTDI USB Adapter
FPC5832 FTDI USB Adapter (Part number: 100015089)
The FPC5832 is an USB-SPI adapter using an FTDI FT232H converter. The CN3 connector is pin-
compatible with CN2 on FPC5924, and CN4 is pin-compatible with CN3 on FPC5924.

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3Setup on Linux – Ubuntu 16.04
3.1 Install Python3
Many Linux distributions come with Python3 pre-installed. To make sure your Python3
is up to date, open a terminal window and type the following commands:
“sudo apt-get update”
“sudo apt-get upgrade”
When the process is complete, check the version of Python3 by typing the following
command: “python3 -V”
Expected output will be “Python 3.5.2” or something similar. Recommended version is 3.4 or
higher so that the Python package manager, pip, comes pre-installed.
If Python3 is not pre-installed on your system, install it by opening a terminal window
and typing the command: “sudo apt-get install python3”
3.2 Install the required packages
The required packages for using the bep_ref.py script together with the BM-Lite on Linux are:
pexpect
pyserial
numpy
pillow
pyftdi
spidev
Install these by using the pip install command in a terminal window:
“python3 -m pip install <package name>”
For example: “python3 -m pip install pexpect”
The package manager will fetch and install the package for you. Repeat the install command
for all of the above packages.

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3.3 Run reference Python Script to test the BM-Lite
With the BM-Lite release comes a .zip file named “FPC-BEP-SW-
DELIVERY_PYTHON_SCRIPTS_fpc_bm_lite_1.2.0.006.zip”. This zip file contains the Python
scripts necessary to test the functionalities of the BM-Lite module.
Connect your BM-Lite module to the FPC5832 board as shown below.
Unzip the “python” folder from the .zip file into the directory of your choice.
Open a terminal window and navigate into the “python” folder you just unzipped.
Run the Python script called “bep_ref.py” using the following command and argument:
“sudo python3 ./bep_ref.py -i spi”