Very low cost solution for palm size Linux computer
Stefano Amorosi
peripherals for a very low cost solution for a palm-size computer
running Linux or uCLinux O.S.
I need to drive the following devices:
LCD with touch screen,
small keyboard,
IRDA,
Audio Input/Output (with a codec),
UART.
Thank you in advance to everybody helping me,
Stefano Amorosi
Mark A. Odell
<3AAE4305...@datalogic.it>:
>I am searching for a microprocessor with integrated or external
>peripherals for a very low cost solution for a palm-size computer
>running Linux or uCLinux O.S.
>
>I need to drive the following devices:
>LCD with touch screen,
>small keyboard,
>IRDA,
>Audio Input/Output (with a codec),
>UART.
Close would be the Motorola MPC823 (PowerPC).
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8051 or bust.
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be based on Linux. It might have been SCasio, but I think it was sharp.
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Peter Dennett
LINUX.
Look at:
http://www.handhelds.org/
http://www.arm.linux.org.uk/
In general the best fit for what you describe is the iPAQ H3600
based on the Intel StrongARM.
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"Stefano Amorosi" <samo...@datalogic.it> wrote in message
news:3AAE4305...@datalogic.it...
Bill Pringlemeir
>> I am searching for a microprocessor with integrated or external
>> peripherals for a very low cost solution for a palm-size computer
>> running Linux or uCLinux O.S.
>>
>> I need to drive the following devices: LCD with touch screen,
>> small keyboard, IRDA, Audio Input/Output (with a codec), UART.
>>>>> "Peter" == Peter Dennett <pden...@padsoft.com> writes:
Peter> There are a number of Palm systems that use ARM cpus and have
Peter> LINUX.
Peter> Look at: http://www.handhelds.org/
Peter> http://www.arm.linux.org.uk/
Peter> In general the best fit for what you describe is the iPAQ
Peter> H3600 based on the Intel StrongARM.
In my opinion, the Psion devices would work well too. I think that
several people are porting (have ported) Linux to these devices.
It doesn't seem to make sense to use uCLinux. Other versions are much
better. Several people are using the regular Linux with the
`Netwinder', which uses an SA110 (i think...).
Here is some info from comp.sys.arm under the title, "Which PDA using
ARM processor?". You can see it with these links,
"Michael Williams" gave a nice list in that thread.
* Newtons: ARM610/ARM710a/StrongARM 110
* Compaq iPaq: some kind of StrongARM device, probably SA-1110
* Psion series 5, 5mx and Revo: ARM7 based devices
* Psion series 7/netBook: StrongARM (probably SA-1110 again)
* HP Jornada 720 and 820: StrongARM devices (I think)
* Nokia 9210: ARM7TDMI and ARM9TDMI (both in one device)
regards,
Bill Pringlemeir
--
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Ken Lee
I posted something on the Hitachi K24 some time ago
(unfortunately I can't find the old post) but I'll summarize it here.
The K24 is a SH CPU Module board -- it has the following (except for
the price, reading direct off the spec sheet):
o about US$100
o uses Hitachi SH-3 SH7709CSP running at 80MHz
o supports Windows CE and Hitachi supported Linux
o SDRAM 16 Mbytes (32 bit data bus) on-board
o SRAM 512 Kbytes (8 bit data bus) but can support up to 1 Mbytes
o Flash 512 Kbytes (8 bit data bus)
o 2 serial ports with FIFO catered by SCI2 and SCI3 (on SH7709)
o Smart card supported by SH7709 using SCI1
o Keypad 3 by 8 scan keypad implemented using SH7709 GPIOs
o Touch panel support using SH7709 on-chip 2 analogue channels
o LCD controller IT8251G with 16 Mbits SDRAM, support up to 1024 x 768
o USB support using IT8251G on-chip USB function & host interface
o Audio I2S interface by IT8251G on chip interface
o PCMCIA 2 slots of memory & I/O card using SH7709 on-chip PCMCIA
function, control G/A (don't ask me what it is -- I just read it) &
buffers
o RTC using Ricoh RS5C321A
o 160 pin KEL DG01-160 or available with 240 pin Samtec BSH-120-01-F-D
o All this on a card which measures 50 x 67 x 5 mm (slightly smaller
than a credit card - I've seen the sample). The height includes the
height of the connector.
You now know what I know, so please don't ask me anymore. I believe
there are supply problems and the module may be limited for sale to
the Asia-Oceanic region. Apart from that talk to your friendly local
Hitachi rep. There are caveats on its application usage which you
should discuss with the Hitachi rep. I was told that the CPU will be
upgraded to the SH7728 (or 7729? - can't remember) which has the USB
host controller on-board. I received this information in June 2000 so
some of this information may be old hat by now - really haven't
followed it since.
Ken.
Lewin A.R.W. Edwards
> peripherals for a very low cost solution for a palm-size computer
> running Linux or uCLinux O.S.
The Cirrus Logic CL-EP7312 is an excellent match for your application; it's
cheap, and rumored to be getting cheaper soon. It also has very low power
consumption. It has everything you want on-chip except the audio codec (it
has an interface for one, though).
The evaluation board for the EP-7212 (the predecessor to the 7312, virtually
identical except for different RAM controller) comes with Royal Linux.
--
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