JTAG issues Cyclone V SoC

A

Al Clark

Guest
I am designing my own Altera Cyclone V SoM board. It is not
intended to be a dev board. It will be a function module that
also includes Analog Devices' SHARC DSPs.

I am working on the JTAG connection strategy. It seems to me
that separate JTAG connections make more sense than chaining
since Quartus may be running separately from the ARM (HPS).

Unless someone tells me something different, my plan is to use a
pair of 2mm 2x5 headers, one for the FPGA and the other for the
HPS. These would be identical to the Altera pinouts, just
smaller.

I expect that the board will be running uLinux, probably GCC.

Here are my questions:

1. I know that many of the Altera Cyclone V dev boards use a USB
Blaster 2 circuit. Does anyone sell a USB Blaster 2 download
cable? I have lots of USB Blaster clones already.

2. What should I do about the HPS TRST#. It is not supported on
the USB Blaster?

3. The HPS Trace connections might be useful but these are
needed for their alternate I/O functions. I am assuming that the
Mictor interface will not be that helpful.

I would appreciate any other comments or insight.

Al




---
This email is free from viruses and malware because avast! Antivirus protection is active.
http://www.avast.com
 
"Al Clark" <aclark@danvillesignal.com> wrote in message
news:XnsA3168F143979Caclarkdanvillesignal@69.16.179.20...
I am designing my own Altera Cyclone V SoM board. It is not
intended to be a dev board. It will be a function module that
also includes Analog Devices' SHARC DSPs.

I am working on the JTAG connection strategy. It seems to me
that separate JTAG connections make more sense than chaining
since Quartus may be running separately from the ARM (HPS).

Unless someone tells me something different, my plan is to use a
pair of 2mm 2x5 headers, one for the FPGA and the other for the
HPS. These would be identical to the Altera pinouts, just
smaller.

I expect that the board will be running uLinux, probably GCC.

Here are my questions:

1. I know that many of the Altera Cyclone V dev boards use a USB
Blaster 2 circuit. Does anyone sell a USB Blaster 2 download
cable? I have lots of USB Blaster clones already.

2. What should I do about the HPS TRST#. It is not supported on
the USB Blaster?

3. The HPS Trace connections might be useful but these are
needed for their alternate I/O functions. I am assuming that the
Mictor interface will not be that helpful.

I would appreciate any other comments or insight.
Click to expand...

I'd say take a schematic piece from a development kit and copy that.
Original USB Blasters are sold from various distributors, however I've used
a chinese clone and original one. Basically I see no difference between
chinese and original one.

P.S. Disable that AVAST advertise.
 
"Tomas D." <mailsoc_del_spam_@gmail.com> wrote in
news:lj699g$td2$1@dont-email.me:

"Al Clark" <aclark@danvillesignal.com> wrote in message
news:XnsA3168F143979Caclarkdanvillesignal@69.16.179.20...
I am designing my own Altera Cyclone V SoM board. It is not
intended to be a dev board. It will be a function module
that also includes Analog Devices' SHARC DSPs.

I am working on the JTAG connection strategy. It seems to
me that separate JTAG connections make more sense than
chaining since Quartus may be running separately from the
ARM (HPS).

Unless someone tells me something different, my plan is to
use a pair of 2mm 2x5 headers, one for the FPGA and the
other for the HPS. These would be identical to the Altera
pinouts, just smaller.

I expect that the board will be running uLinux, probably
GCC.

Here are my questions:

1. I know that many of the Altera Cyclone V dev boards use
a USB Blaster 2 circuit. Does anyone sell a USB Blaster 2
download cable? I have lots of USB Blaster clones already.

2. What should I do about the HPS TRST#. It is not
supported on the USB Blaster?

3. The HPS Trace connections might be useful but these are
needed for their alternate I/O functions. I am assuming
that the Mictor interface will not be that helpful.

I would appreciate any other comments or insight.

I'd say take a schematic piece from a development kit and
copy that. Original USB Blasters are sold from various
distributors, however I've used a chinese clone and
original one. Basically I see no difference between chinese
and original one.

P.S. Disable that AVAST advertise.
Click to expand...

Thanks Tomas for your comments.

I too have found that the clone USB Blasters are fine. The USB
Blaster II uses high speed, not full speed USB. I have also
noticed that pin 6 & pin 8 sometimes have alternate functions
like warm reset and TRST#. I don't know if these are supported
in the USB Blaster II.

I have been reviewing a variety of dev kit schematics for
ideas.

On my design I used a pair of 2x5 2mm headers. I will make an
adapter that will optionally allow chaining. I may break out
to a mictor header as well as a 2x5 0.100 style Altera header.

I just changed an AVAST setting. Hopefully, the AVAST tag
disappears with this post. I don't like it either.

Al
















---
This email is free from viruses and malware because avast! Antivirus protection is active.
http://www.avast.com
 
Al Clark <aclark@danvillesignal.com> wrote:
I too have found that the clone USB Blasters are fine. The USB
Blaster II uses high speed, not full speed USB. I have also
noticed that pin 6 & pin 8 sometimes have alternate functions
like warm reset and TRST#. I don't know if these are supported
in the USB Blaster II.
Click to expand...

The standard 11Mbps USB Blaster is essentially an FT245 USB-to-parallel
converter chip followed by a small CPLD doing parallel to serial conversion.
Pins 6 and 8 are extra 'GPIOs' from the FT245 - they get used for doing
other non-JTAG modes like Active Serial. They're not needed for standard
FPGA programming.

The USB2 USB Blaster II uses a Cypress USB microcontroller instead of an
FT245. Usually it's integrated onto boards. I've not seen it for sale as a
separate device, though there are manuals dated Jan 2014 for it so it must
exist. It looks like it's fairly new since it says it's only fully
supported in Quartus 14.0 (USB2 support on other boards has existed for the
last 2 years or so).

Note that some boards have an additional high-speed link for System Console
- this requires an extra bus from the FPGA into the Blaster CPLD: it won't
work for a standalone JTAG programmer (but you can use System Console over
slower JTAG instead).

The manual for the standalone Blaster II:
http://www.altera.co.uk/literature/ug/ug_usb_blstr_II_cable.pdf
shows that it does wire all the pins for Active Serial mode.
My guess would be that the 'USB Interface Chip' is the Cypress FX2
microcontroller as there isn't a USB2 version of the FT245.
That being so, don't expect clones anytime soon until someone duplicates the
software.

Theo
 
You must log in or register to reply here.

Welcome to EDABoard.com

Sponsor

Back
Top