Experimenting with Jalapeno firmware...

[bitpop]

Ok xoxox

[danattacker]

Hey everyone. I made the decision to auction off my miner since it makes the most economical sense to me. I do so somewhat reluctantly, since I spent a lot of time tinkering with it and I also already ordered 2 more chips that I was planning on soldering to the board. There is a good chance the auction will fail since I am definitely making it worth my time if I do sell it. Don't worry, I'll still help out anyone who wants to reflash their board.

https://bitcointalk.org/index.php?topic=240134.0

[Lucko]

I was thinking about flipping the fan to decrease heat. Could it be that heat sensor is cooled bether that way? 10 degrees it a lot so I don't think this is something that BFL missed out... I know that this means that air about the board is cooler but still 10 degrees? Unless we are talking  Fahrenheit I really don't think so. And I relay think that this is not the chip temperature... I think this is something close to chip that is affected by air flow.

Also adding 2 more chip shouldn't be a problem. From what we figure it out(designing the boards) for now if the board is the same as published by BFL power supply should get out 80A @ 1V so enough for 4 16W chips. So as long as you are able to add 2 chips(not that easy) on the board this should work. When I get my unit and sample chips from my GB I can report... But it will not be from first batch since those will go on boards we are designing.

Other then firmware limitations I see no problems for 95% 2 chip Jalapeno to go to 7. Even ones with C grade chips. Unless BFL is not telling us something. Double A grade should be 8.4... Double D grade with increased frequency might even make it close to 7...

EDIT: Probably chip is less then 16W since unit idle is 16W and runing is 32W. Maybe even just 12 or less so you can even add 6 or 7 on the board and make something close to little single. If you add some cooling to the MOS you might get way with 8.

[danattacker]

I was thinking about flipping the fan to decrease heat. Could it be that heat sensor is cooled bether that way? 10 degrees it a lot so I don't think this is something that BFL missed out... I know that this means that air about the board is cooler but still 10 degrees? Unless we are talking  Fahrenheit I really don't think so. And I relay think that this is not the chip temperature... I think this is something close to chip that is affected by air flow.

Also adding 2 more chip shouldn't be a problem. From what we figure it out(designing the boards) for now if the board is the same as published by BFL power supply should get out 80A @ 1V so enough for 4 16W chips. So as long as you are able to add 2 chips(not that easy) on the board this should work. When I get my unit and sample chips from my GB I can report... But it will not be from first batch since those will go on boards we are designing.

Other then firmware limitations I see no problems for 95% 2 chip Jalapeno to go to 7. Even ones with C grade chips. Unless BFL is not telling us something. Double A grade should be 8.4... Double D grade with increased frequency might even make it close to 7...

The temperature is read from two temperature sensors nearby the chips. It is not the actual die temperature. When the fan is flipped, your getting more airflow directly on the sensors, resulting in the drastic temperature drop.

[bitpop]

I think it's better to flip it only if you leave it open.

You've already overclocked it?

[Lucko]

I think it's better to flip it only if you leave it open.

You've already overclocked it?

Did you asked me? No I will live it as it is and when the boards are ready for testing I will remove chips from it. And when I get enough of samples I will put them on and see how far can I push it(read my edit I had wrong number in my had).

[MinorMiner]

Since we're talking about 7GHash Jalapenos, anyone have any ideas how to combat the high error rates I'm seeing on mine?

I am running 2 of them with bfgminer. Not taken the cases off yet.

e.g.

 BFL 0:  37.0C/42.0C   |  6.40/ 6.50/ 5.09Gh/s | A: 68 R:0+0(none) HW:62
 BFL 1:  42.0C/51.0C   |  8.34/ 8.20/ 8.45Gh/s | A:113 R:0+0(none) HW:55

[Lucko]

Since we're talking about 7GHash Jalapenos, anyone have any ideas how to combat the high error rates I'm seeing on mine?

I am running 2 of them with bfgminer. Not taken the cases off yet.

e.g.

 BFL 0:  37.0C/42.0C   |  6.40/ 6.50/ 5.09Gh/s | A: 68 R:0+0(none) HW:62
 BFL 1:  42.0C/51.0C   |  8.34/ 8.20/ 8.45Gh/s | A:113 R:0+0(none) HW:55

CGminer? If you read beck you will see that last version has something different...

[MinorMiner]

Should have said, I have tried cgminer and I get the same problem.

[danattacker]

Since we're talking about 7GHash Jalapenos, anyone have any ideas how to combat the high error rates I'm seeing on mine?

I am running 2 of them with bfgminer. Not taken the cases off yet.

e.g.

 BFL 0:  37.0C/42.0C   |  6.40/ 6.50/ 5.09Gh/s | A: 68 R:0+0(none) HW:62
 BFL 1:  42.0C/51.0C   |  8.34/ 8.20/ 8.45Gh/s | A:113 R:0+0(none) HW:55

What difficulty are you mining at? I would imagine that if you decreased difficulty and HW errors stayed the same then it's probably normal. Also, if your getting the expected hashrate on the pool side then I wouldn't worry much about it.

[bitpop]

That proves further they didn't bin their chips.

No the guy selling his, how'd you already overclock it?

[danattacker]

That proves further they didn't bin their chips.

No the guy selling his, how'd you already overclock it?

I overclocked it when I flashed the new firmware. The frequency factor is set to 7 (274 MHz). I was getting 7.65 GH/s before overclock and now I'm getting 8.2 GH/s after overclock.

[bitpop]

Can you teach me?

[jelin1984]

Is possible jalapeño 5ghz to overclocked to 7 ghz

[HowGudAmI]

Why do people post "watching" rather than pressing the watch button and watching? Ah yes, to increase post count.

Not that I am one to post 'watching', perhaps the user did not know of the 'watch' button or they know of it but prefer to see updates in the 'new replies to your posts' section.

Not everyone is a spammer/scammer.

EDIT: Just realise this is three days after he posted in a relatively busy thread, probably wasn't worth writing. Ignore me

[danattacker]

Can you teach me?

It has been discussed previously on this thread. You will need a compatible JTAG programmer and then you use Atmel Studio to compile and upload the firmware to the board. There are a few challenges since you will probably need to remove the heat sink to attach the JTAG cable, and you need to cool the chips somehow while programming it.

Is possible jalapeño 5ghz to overclocked to 7 ghz

Yes, it should be possible.

[Lucko]

Is possible jalapeño 5ghz to overclocked to 7 ghz

I think you are mistaking GHz and Ghashes... But if you are euning at 5ghz we can tell you that this is more then enough:) ....

OK I will stop joking. Yes you can but you probably can't. You need some hardware and software that you probably don't have and knowledge that your question showed that you don't have. Unless you find someone who can flash it for you the answer is no.

[peterepeat]

I have found a segger J-Link USB with a 20 pin output laying about - can this be used/adapted to flash via the 10 pin JTAG 1 header on the Jalapeno board, but it only comes with a 20 connector ribbon cable.
Do I need another JTAG adapter, or can this one be used?
Thanks

[danattacker]

I have found a segger J-Link USB with a 20 pin output laying about - can this be used/adapted to flash via the 10 pin JTAG 1 header on the Jalapeno board, but it only comes with a 20 connector ribbon cable.
Do I need another JTAG adapter, or can this one be used?
Thanks

It probably won't work. Maybe you can play around with the bsdl files but you run the risk of corrupting the firmware on the chip with an unsupported programmer (like I did). The programmers supported by Atmel Studio and the microcontroller are (according to Atmel Studio): AVR Dragon, AVR ONE!, JTAGICE3, JTAGICE3 mkII, STK600. The AVR Dragon appeared to be cheapest so that is what I bought.

[peterepeat]

I have found a segger J-Link USB with a 20 pin output laying about - can this be used/adapted to flash via the 10 pin JTAG 1 header on the Jalapeno board, but it only comes with a 20 connector ribbon cable.
Do I need another JTAG adapter, or can this one be used?
Thanks

It probably won't work. Maybe you can play around with the bsdl files but you run the risk of corrupting the firmware on the chip with an unsupported programmer (like I did). The programmers supported by Atmel Studio and the microcontroller are (according to Atmel Studio): AVR Dragon, AVR ONE!, JTAGICE3, JTAGICE3 mkII, STK600. The AVR Dragon appeared to be cheapest so that is what I bought.

thanks - I'll put the Segger away and get an AVR Dragon.
Cheers