BFL ASIC mining board project - page 7.

mmmerlin

sr. member

Activity: 266

Merit: 250

Quote from: MrTeal on August 21, 2013, 01:31:42 PM

Quote from: mmmerlin on August 21, 2013, 12:56:05 PM

Quote from: MrTeal on August 21, 2013, 12:53:12 PM

To be honest, I haven't been segregating them and marking which samples are my original ones vs which were sent to me. They're all mounted to boards in whatever order they're sitting in trays.

That's fine, I just wanted to make sure that BFL actually sent mine to you, otherwise I'll chase them up! Do you know if mine ever arrived?

Yep, they sure did. Thanks!

Awesome, glad they made it to you! Now I've just got to cross my fingers and hope my chips aren't too far behind...

MrTeal

legendary

Activity: 1274

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Quote from: BFL-Engineer on August 21, 2013, 02:12:30 PM

To clarify one thing, when the __PRODUCT_JALAPENO or __PRODUCT_LITTLE_SINGLE is selected, the crystal used for the MCU should be 16MHz. However for SINGLE or MINIRIG models, then the crystal
used should be 12MHz, otherwise the Frequency of the ASICs is going to be incorrectly calculated (that is where you get 320MHz speed report, etc).

Regards,
Nasser

Thanks for the reply Nasser, although I think you're mistaken here. There is no Product_Jalapeno or Product_Little_Single, the firmware is entirely custom on an ARM chip. The 320MHz was measured at the clk_out pin as the divided by 64 version of the onboard PLL while using divide by two internal divisor.

Is there an email I can reach you at? I would like to ask a few technical questions about the chip in regards to setting it up to use an undivided version of the onboard PLL as the chip clock. I will PM you my contact details.

BFL-Engineer

full member

Activity: 227

Merit: 100

To clarify one thing, when the __PRODUCT_JALAPENO or __PRODUCT_LITTLE_SINGLE is selected, the crystal used for the MCU should be 16MHz. However for SINGLE or MINIRIG models, then the crystal
used should be 12MHz, otherwise the Frequency of the ASICs is going to be incorrectly calculated (that is where you get 320MHz speed report, etc).

Regards,
Nasser

MrTeal

legendary

Activity: 1274

Merit: 1004

Quote from: mmmerlin on August 21, 2013, 12:56:05 PM

Quote from: MrTeal on August 21, 2013, 12:53:12 PM

To be honest, I haven't been segregating them and marking which samples are my original ones vs which were sent to me. They're all mounted to boards in whatever order they're sitting in trays.

That's fine, I just wanted to make sure that BFL actually sent mine to you, otherwise I'll chase them up! Do you know if mine ever arrived?

Yep, they sure did. Thanks!

MrTeal

legendary

Activity: 1274

Merit: 1004

Quote from: jborkl on August 20, 2013, 09:50:53 AM

Roughly 30 days till the BFL chips show up (If they keep the 100 day delivery). Do you think the PCB and design will be finalized and ready to go? Thanks, jborkl

I do. The 8 chip design is in fab right now, and while it's not the exact version that will be in production (there will be less debug headers and whatnot) the production version is being finalized right now and will be sent off pending confirmation that the changes made for this board perform as expected.

Some of the changes include switching to TI NexFET integrated driver MOSFets (with peak efficiency around 100A for the 8 chip system and max current of 160A), switching to a 6 layer PCB to provide lower inductance and resistance in getting all that current to the chips, and tweaking the layout and optimization of the chip layout.

mmmerlin

sr. member

Activity: 266

Merit: 250

Quote from: MrTeal on August 21, 2013, 12:53:12 PM

To be honest, I haven't been segregating them and marking which samples are my original ones vs which were sent to me. They're all mounted to boards in whatever order they're sitting in trays.

That's fine, I just wanted to make sure that BFL actually sent mine to you, otherwise I'll chase them up! Do you know if mine ever arrived?

MrTeal

legendary

Activity: 1274

Merit: 1004

To be honest, I haven't been segregating them and marking which samples are my original ones vs which were sent to me. They're all mounted to boards in whatever order they're sitting in trays.

ysyang21

newbie

Activity: 9

Merit: 0

Hi MrTeal, How are my sample chips working with testing boards? Are they also defect ICs?

mmmerlin

sr. member

Activity: 266

Merit: 250

Quote from: MrTeal on August 20, 2013, 05:20:48 PM

Quote from: Henchman24 on August 20, 2013, 10:46:05 AM

Great work, MrTeal!

BTW, how shitty were the samples I sent? Cheesy

LOL... Don't know yet. The 8 chip board is being fabbed as we speak, so I should know more one they're built.

Did mine arrive with you yet?

MrTeal

legendary

Activity: 1274

Merit: 1004

Quote from: Henchman24 on August 20, 2013, 10:46:05 AM

Great work, MrTeal!

BTW, how shitty were the samples I sent? Cheesy

LOL... Don't know yet. The 8 chip board is being fabbed as we speak, so I should know more one they're built.

Henchman24

sr. member

Activity: 378

Merit: 250

Great work, MrTeal!

BTW, how shitty were the samples I sent? Cheesy

mmmerlin

sr. member

Activity: 266

Merit: 250

Quote from: mmmerlin on August 20, 2013, 10:27:03 AM

Quote from: jborkl on August 20, 2013, 09:50:53 AM

Roughly 30 days till the BFL chips show up (If they keep the 100 day delivery). Do you think the PCB and design will be finalized and ready to go? Thanks, jborkl

Do you think the chips will arrive on time? Wink

Though joking aside, I'm genuinely curious about what people's opinions are on this... There are arguments both for and against, so it would be interesting to see where people stand on this.

mmmerlin

sr. member

Activity: 266

Merit: 250

Quote from: jborkl on August 20, 2013, 09:50:53 AM

Roughly 30 days till the BFL chips show up (If they keep the 100 day delivery). Do you think the PCB and design will be finalized and ready to go? Thanks, jborkl

Do you think the chips will arrive on time? Wink

jborkl

sr. member

Activity: 246

Merit: 250

Team Heritage Motorsports

Roughly 30 days till the BFL chips show up (If they keep the 100 day delivery). Do you think the PCB and design will be finalized and ready to go? Thanks, jborkl

Lucko

hero member

Activity: 826

Merit: 1000

Don't get me wrong... I do believe you(it would be in line with what we learned) and I know how you got BAJ2 since I got up to 12

. But I don't get it how can you get different data in summery and device with only one device send all shares... If any device should be higher not other way around since data for the device is from plunging in the device and summery is from cgminer start... And it might get someone else confused as well...

And sorry for forgot to say good job!

MrTeal

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Quote from: Lucko on August 17, 2013, 03:22:19 AM

I have no problem believe that. I'm just saying I don't see that... I know you get 1MH per core for every 1MHz... So yes it should be 2904MH

But I must say your CGminer is realy strange. Data on top and at device should be about the same for only one device... Unless you pluged it in at later date and mined before that. But since you have same number of accepted shares this is not the case...

Someone on the BFL forums asked for pictures, so I grabbed a couple in the middle of testing. I'm not sure exactly what I was doing at the time. I don't bother restarting cgminer, I just flash the device; it drops out and gets redetected once programming it complete. That's also why it shows as BAJ2 when it's the only one in the system instead of BAJ0. As for why the shares are the same, I'm really not sure. I won't be back at the office until Monday so I won't be able to test flashing it in the middle of hashing to see what's going on with the number of shares.

sr_miner

newbie

Activity: 56

Merit: 0

Quote from: MrTeal on August 15, 2013, 01:01:56 PM

Because some people wanted pictures.

Test setup

Running at 363MHz (11.36MHz * 64 for the PLL clock, with 2 divisor)

Putting out 2.9GH/s on 8 cores

Awesome!
Congrats MrTeal... Wink

Lucko

hero member

Activity: 826

Merit: 1000

I have no problem believe that. I'm just saying I don't see that... I know you get 1MH per core for every 1MHz... So yes it should be 2904MH

But I must say your CGminer is realy strange. Data on top and at device should be about the same for only one device... Unless you pluged it in at later date and mined before that. But since you have same number of accepted shares this is not the case...

MrTeal

legendary

Activity: 1274

Merit: 1004

Quote from: Lucko on August 17, 2013, 12:59:19 AM

Unless you have a build of cgminer that has this turned it is the other way around first one is showing 5s average and second is average...
So it should be 2.4 not 2.9

Ah, you're right on the order, my mistake. If you'd really like I can take a video of it hashing on 8 cores at 2.9GH/s on Monday, this time making sure I zero the stats after fiddling with things. I'm not sure why you find it so hard to believe that it's producing 2.9GH/s though considering the cores aren't giving hardware errors and that is the expected hashrate for that clock speed and number of engines.

Lucko

hero member

Activity: 826

Merit: 1000

Quote from: MrTeal on August 16, 2013, 07:55:52 PM

Quote from: Lucko on August 16, 2013, 06:07:36 PM

Isn't that 2.4?

No, it's 2.9. The one showing 2.4GH/s bounces around all the time depending on when shares are discovered, but the average was 2.9GH/s.

Unless you have a build of cgminer that has this turned it is the other way around first one is showing 5s average and second is average...

EDIT:
If that was the case I had 10GH jala(with our firmware)

But the pool say I don't. It has up and downs but it average on 8,5 to 8,6...

Still not bad since stock 1.2.5 got only 7.3 out... And modified got 7.8

So it should be 2.4 not 2.9

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