Hi! Is it possible to increase Maple's SRAM? If yes, how can I do that?
Increase Maple's SRAM
(5 posts) (3 voices)-
zoofdxp
MemberThat is a pretty open question...how it will be used and how much of it you need makes a difference...
If you need 32K x 8 for example...you could wire in a Microchip 23K256 SPI SRAM and
write some code to access it.If you need, let us say 256K x 8 then the following solution may work for you:
http://majolsurf.net/wordpress/?p=930It is an Amani 64 CPLD shield for the arduino form factor, handles 3.3V, and they have provided code that banks up to 8 32K x 8 chips. The CPLD is used so that no delay penalties are incurred during data trasfer, as may happen when using a simpler scheme to bank the ICs using GPIOs as chip selects..essentially all of the SRAM chips come together to form a contiguous memory space. Arduino source code is provided banking 4 23K256 sram chips.
Posted 4 years ago # -
galindro
MemberI want use maple with PolarSSL -> http://polarssl.org/
I'll need more SRAM to exec cryptograph operations. Did you know if Amani 64 CPLD Shield itself can exec cryptograph operations for arduino?Please, see this: http://polarssl.org/forum_view_topic?topic_id=182
Posted 4 years ago # -
gbulmer
Moderatorgalindro - if you are interested in encryption, but not tied to polarssl, you might also consider is an STM32W which has an AES accelerator. It has built in 802.15.4 wireless too.
You can get a development kit with a two development boards using them for under £25 (+VAT) from Farnell
http://www.st.com/internet/evalboard/product/251361.jsp
http://uk.farnell.com/stmicroelectronics/stm32w-rfckit/kit-rf-control-stm32w/dp/1879378Posted 4 years ago #
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