FTDIProgrammer User Manual

FTDIProgrammer%20User%20Manual

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FTDI Programmer User Manual
Kunal Chakraborty
kunalc@cdot.in
January 21, 2019

0.1

Introduction

FTDI-programmer is an application written in pure python to access/program
on board devices through FTDI devices using jtag/spi/i2c/gpio interfaces.
JTAG programming is done through svf file. It can be used in place of any
external emulator. The application is built on PyFtdi driver.
The source code is compatible with both Windows and Linux system. However this manual is written from a windows user’s point of view.
This is a Beta version and hence the application has couple of limitations as
listed in section 0.3

0.2

Features

• On board device programming through JTAG interface. It needs svf
file for JTAG programming.
• TI UCD device programming through I2C interface. It needs SMBUS
csv file programming. This file can be generated by Fusion tool.
• SPI Flash programming.(to be implemented)
• On board device access thhrough spi/i2c/gpio interfaces. (to be implemented)

0.3

Limitation

1. I2C mode
(a) FTDI devices does not support multimaster and clock stretching.
Hence this application will not work with slave devices which requires clock stretching. In that case application can be run on
lower frequency so that target device may get enough time to
respond. However there is a workaround given by FTDI by connecting I2C SCL to a separate gpio of FTDI device so that FTDI
device can read the clock line. This feature is not supported in
present version FTDI-programmer.
1

(b) Highest I2C slave address supported is 0x78. It is the limitation
from pyftdi driver. No workaround is provided.
2. JTAG mode
(a) Target device must be the only device in JTAG chain because SVF
parser of FTDI-programmer does not support header and trailer
addition. This is kept as Future Development.
(b) SVF file verification takes longer than expected. This is because
pyftdi driver takes long time to send data to application after
reading from usb. This is kept as Future Development.
(c) Only Max-V CPLD programming is supported. If any other device
is detected, FTDI-programmer will flag a warning and continue
with programming. However the integrity of the programming is
not validated.
3. Others
(a) MS Windows detects every channel of FTDI device as a separate
usb device with same VID and PID. Hence FTDI-programmer can
access only single channel of FTDI device. So user must enable a
single lib-usb driver as per FTDI channel number as discussed in
section ??

0.4

Installation

All the required python packages are compiled and supplied with FTDIprogrammer. However it needs a low level backend driver libusb to talk to
FTDI device. You must have admin privilege to carry out below steps. Step
by step installation guide is given below.
1. libusb installation An easy way to install libusb backend on windows
is Zadig. Download the latest version of Zadig Run zadig.exe and you
should get a dialog as shown below Go to Options – List All Devices.
Then select FTDI-channel0 from drop down option. Next select libusbwin32 as driver. Finally, click install driver. Follow the same step to
install driver on FTDI-channel1

2

2. Get FTDI-programmer Download a fresh copy of FTDI-programmer
from ’https://github.com/kunalcdot/FTDI-programmer’. The application is under /bin folder. Run FTDI-programmer.exe to start the
application.

0.5
0.5.1

Programming Guide
JTAG Programming

pre requisite – svf file zadig channel selection

0.5.2

0.6

JTAG Programming

Future Development

1. All programming file parser to be updated with ’regular expression’
module. It should support all svf standard command.
2. JTAG read time needs to be reduced.
3. SPI Flash Programming option to be developed
4. An utility needs to be provided to read/write on board devices through
I2C/SPI/GPIO etc

0.7

Troubleshooting

Ensure only one FTDI device is connected and single ftdi channel is enabled.
Refer to section ?? for more details.

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