Xplained boards

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Could Atmel send me a m7 xplained board? I need some exposure to these so i can continue my support role here.

Cheers

Last Edited: Thu. Oct 15, 2015 - 11:33 PM
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I would suggest you contact your local sales rep. I don't believe this will be a huge problem with 13k+ posts here.

NOTE: I no longer actively read this forum. Please ask your question on www.eevblog.com/forum if you want my answer.

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Thanks Alex. Things were a little quiet in these new forums,so I thought I'd kicks things off a little. Seems the local rep is Arrow - we do significant business via them. I'll hassle the FAE!

 

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Me too ... ?

 

wink

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Am I the only one who sees M7 as a bit of pointless technology? If you have reached M7 why not simply move to A5?

 

(anyway didn't everyone get an Atmel goody box a while back? I know there weren't M7s in it but there were other ARM Xplained boards - I even said at the time I thought it might be an attempt to prepare us to support SAM technology if it came to Freaks ;-)

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I would tend to agree about the M7

 

clawson wrote:
didn't everyone get an Atmel goody box

Clearly, then, I am a nobody.

 

sad

Top Tips:

  1. How to properly post source code - see: https://www.avrfreaks.net/comment... - also how to properly include images/pictures
  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
Last Edited: Fri. Jul 3, 2015 - 08:46 AM
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No goody box pour moi.

I dare say we're seeing the emergence of applications that need more ram, flash and processing but not quite needing a demand paged memory scheme but needing good real time performance. Embedded web stuff methinks with real time controls. The interwebs of fings.

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clawson wrote:
Am I the only one who sees M7 as a bit of pointless technology? If you have reached M7 why not simply move to A5?
Just power supply design for A5 is a complete nightmare. Then you need DRAM and Flash. They take board space and require careful routing.

 

M7 has a lot of performance and much simpler to use, not quite as simple as ATmega8, but still way simpler that A5.

 

clawson wrote:
(anyway didn't everyone get an Atmel goody box a while back? I know there weren't M7s in it but there were other ARM Xplained boards - I even said at the time I thought it might be an attempt to prepare us to support SAM technology if it came to Freaks ;-)

 

Someone needs to figure out directed kits give-aways. We give away a lot of kits on trade shows to complete strangers that are just looking for "swag", with no intention to ever use it. I figure it is better to give them to people who spent considerable amount of their lives on this forum helping others, but what do I know?

NOTE: I no longer actively read this forum. Please ask your question on www.eevblog.com/forum if you want my answer.

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If it weren't for Russ Hanneman, I wouldn't know what 'swag' is! If you don't know who Russ is - Google!

With desirable chips getting harder to design in, the concept of Arduino/Raspi makes them accessable. With the manufacturing might of China, the price point is dropping to the zone where you might use these for moderate production quantities. 'Tis indeed an interesting time.

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Looks like I've got a bit of swag coming my way. I'll write a blurb when i get it and have a play.
The M7 is a bit bleeding edge - i'll have to see what rtos support there is.

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This part has an unprecidented amount of RAM, amazing connectivity, a relatively low price and blazing fast speed

EricKrieg (at) g mail
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they can also be ordered online.  I believe the chips will be available in large quantities soon.  We are using the free schematics of these boards to design our own board - until that is made and populated, the eval board is a good development tool.  Make sure to get the latest V71 projects from the 1.3 service pack.    That has a good number of of example projects.   If anyone has gotten the USB serial port emulator to work, let me know.

EricKrieg (at) g mail
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Unprecedented amounts of ram? How so? There's a few precedents!
Besides, i want megabytes of ram.

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good point - if your approach involves loading a huge linux environment - then I guess you need megabytes - then you have to incur the extra cost, complexity, board space, processor pins to support external RAM.   But either my applications or my approach can suffice without all that.   For me, with even 100K of RAM, I can have an embedded OS and an embedded TCPIP stack and applications code left over.     Doesn't work for everything - but for some clients that want to lower electronics cost, I can come in with a high end Atmel part and replace something that amounts to a computer on a board.    A neat thing about that high end parts like the V71 is that they can run a full computer with a video screen, a full keyboard, etc   - but they can also do most everything for many applications just with the processor leaving more pins free for applications.     From my vantage of small self sufficient applications where I can know what is happening with every byte, I have trouble understanding how big operating system environments chew up gigabytes of RAM and most of the power of a processor running at ghz speeds. 

EricKrieg (at) g mail
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384k of ram isn't exactly new in single chip micros was my point. Thus it is not 'unprecedented'.

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i want megabytes of ram.

Looked at Renesas chips? wink (10, 5 and 3 MB)

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

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It's not unusual for that class of chip to have a big slab of ram - they're romless, so the code gets loaded from a flash device at startup.

Last Edited: Sat. Aug 8, 2015 - 03:48 AM
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the code gets loaded from a flash device at startup.

Went to a Renesas seminar last week and it seems that their chips will run the code from external QSPI flash without the need to load into RAM, but a lot of things went over my head!!

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

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js wrote:
it seems that their chips will run the code from external QSPI flash without the need to load into RAM
SAM V71 will do the same, but it is not the fastest way even with caches enabled.. The RAM is also expandable.

NOTE: I no longer actively read this forum. Please ask your question on www.eevblog.com/forum if you want my answer.

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Alex, i'm told my sam v71 board is on it's way. The XIP (execute in place) feature was one thing i was looking to investigate.
Let's say the spi clock is 50MHz, so max data rate would be around 25Mbytes/s compared with say, the cpu wanting 400x4 Mbytes/sec. There seems to be a rather large difference. The code would have to be sitting in loops most of the time to give the caches half a chance of being effective.

Last Edited: Sat. Aug 8, 2015 - 01:57 PM
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Kartman wrote:
compared with say, the cpu wanting 400x4 Mbytes/sec
CPU runs at maximum 300 MHz and it wants to fetch 64-bits at a time for maximum efficiency. The only memory that can deliver this kind of throughput is TCM (Tightly Coupled Memory). Any amount of main system RAM can be allocated for TCM.

 

Kartman wrote:
The code would have to be sitting in loops most of the time to give the caches half a chance of being effective.
The code you need to run fast (some critical calculations) goes into TCM, the rest of the code goes into flash and caches help a bit.

 

I would not use XIP for actual code, but put data there. This way it will be a little bit more efficient.

 

But you are right, some planning on how you allocate your resource will be required to get the maximum possible performance.

NOTE: I no longer actively read this forum. Please ask your question on www.eevblog.com/forum if you want my answer.

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Why are some old topics being marked as new? I had several today.

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

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I've split a couple today, not sure if this makes the original "new". But not this one.

NOTE: I no longer actively read this forum. Please ask your question on www.eevblog.com/forum if you want my answer.

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I know this is an old thread, but M7 is great, not pointless by any means. I'm running pretty resource intensive audio algorithms that where people say "man are you using AD DSP" - "No, and I haven't had to spend loads of money of dev tools, paying for a seat for an IDE, or invest time learning an architecture that isn't portable to other manufacturers." Coming from a lot of dev on the M4F, the M7 has been a natural extension. In the last year it has completely extended the breadth of applications I can design without passing on significant overhead on to the people I do work for, which are typically start-ups on tight budgets, so I for one am excited to see how far companies take this core over the next few years.