Jon,
thanks for the feedback. The product I am developing has zero need for anything
except Ethernet/IP/primitive web server and 8 low voltage relays.
The device will retail for 99 bucks USD. So it has to be absolutely minimal.
The AT89C55WD will do fine even if I have to add a 6264 for an extra 8K of RAM.
The ENC28J60 is darn cheap too.
I shall need 8 transistors and eight relays.
it all goes into a simple box.
So I don't want any of the Rasberry Pi or other types of entire SBC's. I've
used the TS7200 type LINUX boards for other more complex products that require
an entire OS and numerous ancillary hardware. That's not what I am building
this time around.
Mike
________________________________
From: jon <j...@jonshouse.co.uk>
To: Michael Hawkins <korgpolyex...@yahoo.com>; sdcc-user@lists.sourceforge.net
Sent: Friday, August 30, 2013 2:20 PM
Subject: Re: [Sdcc-user] Alternates to Atmel 89C55WD
On Fri, 2013-08-30 at 10:53 -0700, Michael Hawkins wrote:
> Thanks to all that replied to my shockingly newbie question! I googled
> more and found the answers I needed. I love SDCC! But all of my work
> with SDCC so far has been Z80 because I've worked with Z80 for well
> over 25 years now.
>
> I wanted to switch to more modern chips. I liked the Atmel 89C55WD
> because it has four IO ports plus 24K flash and 256 SRAM. It seemed to
> be darn cheap for all of what it has built in.
If your going to go modern then why not use an ARM core. STM32 for
example.
I used to program Z80 on CP/M, then Z80 on embedded boards. These days I
don't bother with anything much smaller than a full ARM board with
Linux. The price of ARM SOC is so low, compare a beagle board or
Raspberry Pi or one of the generic ARM boards what other hardware you
can buy for the money and its a no contest. Plus having a linux kernel
gives me networking, filesystems, displays etc.
For small jobs I use Microchip PIC. I often combine an ARM board and
PIC and offload anything real time parts onto the PIC then use a serial
channel back to the ARM board for communication. The PIC had great real
world I/O and in the years i've used them I have never had one fail in
service.
Jon
PS The raspberry Pi is good board to experiment but a poor choice for
real products.
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