Firmware page

[Michael Cooper]

Hi All—

 

I hope the holidays have treated you all well.

 

I’ve created a FlySight wiki page for the latest firmware here:

 

http://flysight.ca/wiki/index.php?title=Latest_firmware

 

Any suggestions (or edits) would be appreciated!

 

Michael

[Tom van Dijck]

interesting, any specific reason for the change in hardware?

is it faster/slower? more memory?

can we do more on the newer chips?

Tom.

[Luke Hederman]

I think the main difference is the memory on the chip.

New chip (AT90USB1287)
128KB self-programming Flash Program Memory, 8KB SRAM, 4096-Byte EEPROM

Old chip (AT90USB646)
64KB self-programming Flash Program Memory, 4KB SRAM, 2048-Byte EEPROM

I'd guess the price difference was low as production volume was increased.

On 05/01/2011 11:33, Tom van Dijck wrote:

interesting, any specific reason for the change in hardware?

is it faster/slower? more memory?

can we do more on the newer chips?

Tom.

On Wed, Jan 5, 2011 at 5:10 AM, Michael Cooper <mic...@flysight.ca> wrote:

Hi All�

�

I hope the holidays have treated you all well.

�

I�ve created a FlySight wiki page for the latest firmware here:

�

http://flysight.ca/wiki/index.php?title=Latest_firmware

�

Any suggestions (or edits) would be appreciated!

�

Michael

[Michael Cooper]

There are a couple of differences between the two chips:

 

1.       The AT90USB1287 has more memory, as Luke mentioned.

2.       The AT90USB1287 actually supports USB “On the Go”, although this isn’t supported by the rest of the hardware.

 

The cost difference is significant, actually. The ‘646 runs about $4 a chip in volume, while the ‘1287 runs about $8. The main reason the current run of FlySights uses the ‘1287 is because the ‘646 wasn’t available from distributors except with a very long wait time (one of the “gotchas” I’ve learned in electronics manufacturing). Future runs will probably use the ‘646 again, since even it has plenty of growing room.

 

Michael

 

From: flysig...@googlegroups.com [mailto:flysig...@googlegroups.com] On Behalf Of Luke Hederman
Sent: January-05-11 4:53 AM
To: flysig...@googlegroups.com
Subject: Re: [flysight-devs:0] Firmware page

 

I think the main difference is the memory on the chip.

New chip (AT90USB1287)
128KB self-programming Flash Program Memory, 8KB SRAM, 4096-Byte EEPROM

Old chip (AT90USB646)
64KB self-programming Flash Program Memory, 4KB SRAM, 2048-Byte EEPROM

I'd guess the price difference was low as production volume was increased.


On 05/01/2011 11:33, Tom van Dijck wrote:

interesting, any specific reason for the change in hardware?

is it faster/slower? more memory?

 

can we do more on the newer chips?

 

Tom.

On Wed, Jan 5, 2011 at 5:10 AM, Michael Cooper <mic...@flysight.ca> wrote:

Hi All—

 

I hope the holidays have treated you all well.

 

I’ve created a FlySight wiki page for the latest firmware here:

 

http://flysight.ca/wiki/index.php?title=Latest_firmware

 

Any suggestions (or edits) would be appreciated!

 

Michael