working with external memory

[aratti]

I don't think one byte is enough to store your temperature . with one byte the maximum reading will be 25.5 degree then 25.6 will make your byte overflow to 0.

Al.

[malc-c]

Sorry, should of mentioned, they are words

Temperatures      VAR WORD[4]
  Temp1           VAR Temperatures[0]
  Temp2           VAR Temperatures[1]
  Temp3           VAR Temperatures[2]
  Temp4           VAR Temperatures[3]

with bytes for time

	TimeH var byte     
	TimeM var Byte

[malc-c]

One alternative (assuming I can find it in the UK) is this

http://www.jianpingusa.com/datasheet...nstruction.pdf

Basically an SD/MMC card reader that communicates via serial


Ouch - $50

[mackrackit]

Have you seen this?
Need an 18F with a fair amount of memory. 18F2550 works great with it.

[malc-c]

Have you seen this?
Need an 18F with a fair amount of memory. 18F2550 works great with it.

Seen what Dave ....

Currently using an 18F4580 - The current version of my code compiles to around 24K

[mackrackit]

http://melabs.com/resources/samples/pbp/sdfs3.htm
It was a hidden link

[malc-c]

http://melabs.com/resources/samples/pbp/sdfs3.htm
It was a hidden link

LOL - yeah right !!

Interesting and seems a simple project... the only thing is that I don't have 6 pins available, at least not without changing the package to a 44 pin package and even then I still think it would be tight or short of a pin.... not to mention the re-design of the PCB

Thanks for the link though...

I've opted to do the logging in the PC application, for now