Friday, September 4, 2009

State of the GoodFET

by Travis Goodspeed <travis at radiantmachines.com>

GoodFET20 in Black

I shipped the last of the American GoodFET20 requests today. Please contact me if yours hasn't arrived. Orders to Europe will be sent next week, while I'm in Paris, Besançon, and Stockholm.

I'm now using the MSP430F2618 for GoodFET development, as it will run at 16MHz without a crystal. There are some bit errors on a few of these boards, owing to the accidental erasure of Info Flash by the bootloader. Until rebroadcasts are implemented, continue to construct your boards with the 1612 or 1611. The upcoming GoodFET30 will migrate the project entirely to the 2xx series, breaking compatibility with TI's firmware.

The Python clients are presently being refactored at the same time as the command structure is combined. Please contact me if you are interested in building a client for C# or Cocoa that will be easier to distribute.

Thanks to a generous EVK donation, MSP430X2 support is underway, which will allow such chips as the MSP430F5438 and the CC430 Zigbee SoC devices to be programmed. I've got the basics working, and full support for writing Flash memory ought to be ready rather soon.

I'm considering a plugin architecture that loads new modules into RAM, a GoodFET iPhone attachment, and all sorts of other crazy things. Comment with any feature requests below.

23 comments:

X-Istence said...

Hey Travis,

We spoke at Black Hat and DefCon, I was telling you about the MSP430F2418 which is what I am currently using.

I had the issue that the bsl program written in Python was overwriting Flash segment A which means that all of the calibration data that Ti programmed in when they shipped the chips is gone.

How have you solved that issue? As far as I am aware the 2618 and the 2418 are practically the same ...

For now I have just added a routine to my code that initializes the DCO against the 32 kHz crystal. However if I could do without the crystal and still get a stable clock speed of 1 Mhz or more I could lower the cost of my design significantly.

I look forward to the new improvements made to the GoodFET's, I have my GoodFET 1.1 built, I still need to check that GoodFET 2.0 you gave me. The permanent marker did not come off the board with the nail polish remover I had, so I am not sure if all the parts will work when soldered to the board, and I don't want to use chemicals that are too abrasive for fear of damaging the board!

Thanks,
Bert JW Regeer

Travis Goodspeed said...

Howdy Bert,

For the 2618, I've hard-coded the DCO calibration from an early unit when the Info flash is missing, and I've been saving Info flash images to later plot the deviation and mean timing values. All 2618/F chips seem to be compatible at 16MHz and 115,200 baud with the hardcoded values. (An article on that subject is nearly ready, expect it here within a week.)

You can dump a TI Text file of your FET's Info flash using `make dumpinfo` in the goodfet/trunk/firmware directory. Run this before erasing the chip, and you'll be able to reflash it before the GoodFET firmware to keep things compatible.

If you email me your mailing address, I'll send you some of the fresh GoodFET20 boards that have just arrived. An LF crystal calibration routine for the 2xx chips would also be handy; consider sending a patch to msp430x2618.c.

--Travis

Travis Goodspeed said...

The one argument against the 2274 is that it hasn't got enough RAM to support loadable modules. The 2618 and 1611 can run all of the GoodFET application from RAM.

--Travis

X-Istence said...

Travis,

Have you had any issues by using the values from a different chip? When I went to the MSP430 day here in Phoenix I was under the impression that they tested and everyone and wrote the specific values into the flash segment A.

As for the DCO calibration, for now I have just taken the sample code that Ti has available on their website and taken just the DCO initialization routine, without the Flash A writing. I was thinking of maybe putting that back in, so that my chip only has to run the calibration once so I can ship the design without the crystal, but that makes re-programming harder for future flash upgrades for the customer as now they need to solder in a crystal for the board to work right...

I don't mind adding in the code to re-flash Flash segment A with the appropriate bits, and sending a patch.

Loadable modules sounds like an interesting addition to the GoodFET firmware. Within the following weeks when I get some time I will svn up to the latest version of the repo and start hacking away.

Bert

Travis Goodspeed said...

Howdy Bert,

The Info values are unique to each chip, but within a chip model number and revision the variance seems to be low enough to allow for reliable communication. I have a small collection of Info backups on which I intend to run some simple statistical tests, but in practice, my hardwired values have worked for every MSP430F2618 Rev. F chip that I've tried.

To extract the Info values from a programmed GoodFET, run "goodfet.monitor peek 0x1000 0x10FF". Very soon, I'll have the upgrade tool check for this information by the BSL.

--Travis

deimodos said...

Hey Travis,
These boards look great! Who did you use for the PCB manufacturing?
Thanks,
Deimodos

Blogger said...

There is a chance you are eligible to receive a Apple iPhone 7.

Blogger said...

If you want your ex-girlfriend or ex-boyfriend to come crawling back to you on their knees (no matter why you broke up) you gotta watch this video
right away...

(VIDEO) Have your ex CRAWLING back to you...?

Blogger said...

Order a professional Sparkling White Smiles Custom Teeth Whitening System online and get BIG SAVINGS!
* 10 shades whiter in days!
* Results Are Guaranteed.
* As good as your dentist.
* Same as dentists use.

Blogger said...

Quantum Binary Signals

Professional trading signals sent to your mobile phone daily.

Follow our signals right now & profit up to 270% per day.

Taylor Bara said...

Do you wanna learn more about the case study writing? here is a good place!

Ivymelda said...

Any student is free to request for our Buy Custom Papers Online as we have the most affordable pricing in the market. We always keep our promise and will deliver the paper within the agreed time and ensure that it is written to meet all the Best Custom Paper standards.

Vipin Chauhan said...

Thanks for provide great informatic and looking beautiful blog, really nice required information & the things i never imagined and i would request, wright more blog and blog post like that for us. Thanks you once agian

court marriage in delhi ncr
court marriage in delhi
court marriage in noida
court marriage in ghaziabad
court marriage in gurgaon
court marriage in faridabad
court marriage in greater noida
name change online
court marriage in chandigarh
court marriage in bangalore

maryammiahan said...

I recommend to write such more post.I also recommend visiting elearning mobile app developer

Ishita Bajaj said...

I recommend to write such more post.I also recommend visiting best astrologer

onlineAssignmenthelp said...

Gone are the days when relying on the tutors was the only option. With the changing times, you need to adopt the modern and necessary ways to complete your assignment. Contact The Tutors Help and avail all the assignment services at lower rates. ,Thetutorshelp.com assignment helps Sydney Level 5,121 Castlereagh Street Sydney, NSW 2000 whatsapp +61-280-062-221 info@thetutorshelp.com Seemore-https://www.thetutorshelp.com/assignment-help-in-sydney.php

onlineAssignmenthelp said...

While exploring the subjects, the students get brief ideas about the topics and practice writing, which will help them in examinations. The deadline which comes with the assignments allows students to manage time as well. It helps in making students punctual and upgrades skills of time management in academics. Level 5,121 Castlereagh Street Sydney, NSW 2000 whatsapp +61-280-062-221 info@thetutorshelp.comSeemore-https://www.thetutorshelp.com/assignment-help-in-sydney.php

onlineAssignmenthelp said...

Assignment forms the base of academics. They are the task given to the student to make them self responsible as a part of the educational system. The assignments are provided to strengthen the creativeness as a student grasps more by studying practically. The assignments develop the skills that prepare the students for exams and helps them to attain impressive ideas to significant limits. Assignment Help in Sydney Thetutorshelp.com Level 5,121 Castlereagh Street Sydney, NSW 2000 whatsapp +61- 280-062-221 info@thetutorshelp.com Vistes-https://www.thetutorshelp.com/assignment-help-in-sydney.php

maryammiahan said...

I appreciate for sharing this post keep sharing like this.I also recommend visiting mobile app development company

low back pain treatment said...

Amazing Post, it provide profund knowledge your Blog provide best interpretation of your words. I would also like to induce your attention to Chiropractic Clinic for effective treatment of back pain and associated disorders

plantspecialists said...

Your Blog is just amazing and provides good knowledge do sharing such more blogs. I would also like to induce your attention to plantspecialists for consult, design, install and maintain indoor and outdoor gardens.

Rushil said...

Very Well Explained your Blog is just amazing and provides profound knowledge. I would also like to induce your attention to Sell Whisky Online that offer a range of animation services to support various on demand needs.

DrivenPerformancechiropractic said...

Really it was an amazing post and engaged the audience with your blog. keep writing more Blog. I also recommend visiting Driven Performance Chiropractic