Subject:
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Re: nxt controller specification
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Newsgroups:
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lugnet.robotics.nxt
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Date:
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Wed, 13 Feb 2008 03:13:54 GMT
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Viewed:
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33031 times
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In lugnet.robotics.nxt, Elizabeth Mabrey wrote:
> 32-bit ARM7 microcontroller
> 256 Kbytes FLASH, 64 Kbytes RAM
> 8-bit AVR microcontroller
> 4 Kbytes FLASH, 512 Byte RAM
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> There are 2 controllers onboard?
Yes. The AVR is responsible for a number of things, including PWM and encoder
reading on the motor ports (IMS), the reading of the front panel button state,
power management, and A/D from the input lines for analog sensors. It is not
reprogrammable from the USB port. Think of it as a "helper processor".
As to the memory, what you see in the file system is the flash memory -
specifically, what's left over after the firmware is sitting on there. The RAM
is used for running programs, not storing data, sound or otherwise. If you clean
all the extra stuff off the brick (check "show system files" and then "delete
all"... I think that gets rid of most of it), you can have about 120k available
to the user.
--
Brian Davis
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Message has 2 Replies:
 | | RE: nxt controller specification
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| Thank you for clarifying this, Brian. I was reading (URL) It stated that the NXT with "Stalled torque) up to 50 N.cm. 50N... it equates approximately 10lbs?! That is without any further gearing down, but just the NXT motors!? Wonder if anyone has (...) (16 years ago, 13-Feb-08, to lugnet.robotics.nxt)
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Message is in Reply To:
| | nxt controller specification
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| Hi, I wonder if anyone may be familiar with the spec about the nxt brick: I found this on the ww.hobbyengineering.com . NXT Brick * 32-bit ARM7 microcontroller * 256 Kbytes FLASH, 64 Kbytes RAM * 8-bit AVR microcontroller * 4 Kbytes FLASH, 512 Byte (...) (16 years ago, 13-Feb-08, to lugnet.robotics.nxt)
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