Re: Wiki reader

From	rickman <gnuarm@gmail.com>
Newsgroups	comp.lang.forth
Subject	Re: Wiki reader
Date	2012-10-18 15:21 -0400
Organization	A noiseless patient Spider
Message-ID	<k5pkr8$7kh$1@dont-email.me> (permalink)
References	(6 earlier) <k5c91b$otl$5@dont-email.me> <k5kpmp$g8t$1@dont-email.me> <ae88mlFqn88U1@mid.individual.net> <k5mr0u$8ti$1@dont-email.me> <aeat1tFfbboU1@mid.individual.net>

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On 10/18/2012 1:35 PM, Paul E. Bennett wrote:
> rickman wrote:
>
>> On 10/17/2012 1:36 PM, Paul E. Bennett wrote:
>>> rickman wrote:
>>>
>>>> On 10/13/2012 12:37 AM, rickman wrote:
>>>>>
>>>>> My main concern is how fast a Forth can run the serial port.
>>>>>
>>>>> Rick
>>>>
>>>> Has anyone gotten their units yet and used the serial port?  I won't
>>>> have mine until next week.
>>>>
>>>> I am looking to buy a USB to TTL adapter from eBay and it seems to be
>>>> hard to find one with much info on the pins.  Most units use a PL2303
>>>> chip.  Anyone know if that will interface ok to the Wikireader?  Are the
>>>> Wikireader pins 3.3 volts?
>>>>
>>>> Rick
>>>
>>> Mine arrived last Thursday and I already have a schematic being sketched
>>> up to provide a reasonable driver for the Debug port, along with a couple
>>> of switches (prog and reset).I have contacted a firm who do spring loaded
>>> pins and I am going to build a location block that I will mount on the
>>> PCB of the jig on which the driver circuit is located. Yes, all the
>>> Wikireader pins are 3.3V (apart from the Bat+ and Bat-)
>>
>> I understand the processor is an Epson device.  What debugger is used
>> with it?  Or is this just to reprogram the flash?  I have the impression
>> that there is not much need to program the serial flash since nearly all
>> the data and much code are on the SD card.
>
> Most of the data is on the SD card from what I have gleaned so far. The SD
> card seems to be quite well buried inside the device and thus you need to
> take it apart to get at it. Access to the debug port (from under the battery
> compartment lid) should give an easier in. I also have other plans for the
> Wikireader as a potential small terminal for other systems.

That is exactly how I plan to use it.  But there must be some access to 
the card.  I thought you only had to remove the batteries to reach it? 
Otherwise how could they sell you Wikipedia updates by SD card?


>> How are you going to use the debug port?  How are you going to use the
>> WikiReader?
>
> As a Wikireader (updated as required) and as a small terminal for embedded
> systems testing and debug.
>
>> The spring loaded contact pads are typically used in manufacturing where
>> you want to save the cost of the connector.  Is the spring loaded cable
>> expensive?  Why not solder a standard connector?
>
> The company I have been in touch with do them for bed-of-nails test jigs. I
> have a price from them and am organising the making of teh support block at
> the moment. I shall probably be adding the LTC1387 to get a decent RS232
> signal for the onward comms connections. The RESET and PROG pins will also
> be connected to a switch and pushbutton as appropriate.
>
> I am aiming at a worthwhile and useful tool out of this.
>

Ok.  I will likely wire directly or through a jack as others have done. 
  Some of my tasks don't need the level converter and can talk TTL 
levels.  In fact, I had trouble with a USB converter once because the 
converter chip had a very slow slew rate on one edge which distorted the 
edge timing for fast data rates.  I don't see that with TTL and my cable 
is rather short.

Still, I'd like to see what you end up with.  I guess there is some 
advantage to not having to open the case, but are you sure you can 
update the SD card via the RS-232 port?

Rick

Rick

Thread

Wiki reader Mark Wills <forthfreak@gmail.com> - 2012-10-06 12:02 -0700
  Re: Wiki reader Mark Wills <forthfreak@gmail.com> - 2012-10-06 12:10 -0700
    Re: Wiki reader rickman <gnuarm@gmail.com> - 2012-10-09 13:28 -0400
      Re: Wiki reader Paul Rubin <no.email@nospam.invalid> - 2012-10-09 20:09 -0700
        Re: Wiki reader paulhidecs@gmail.com - 2012-10-12 03:57 -0700
          Re: Wiki reader Mark Wills <forthfreak@gmail.com> - 2012-10-12 05:35 -0700
            Re: Wiki reader "Paul E. Bennett" <Paul_E.Bennett@topmail.co.uk> - 2012-10-12 23:17 +0100
          Re: Wiki reader Mark Wills <forthfreak@gmail.com> - 2012-10-12 05:36 -0700
          Re: Wiki reader Mark Wills <forthfreak@gmail.com> - 2012-10-12 05:38 -0700
            Re: Wiki reader rickman <gnuarm@gmail.com> - 2012-10-13 00:37 -0400
              Re: Wiki reader rickman <gnuarm@gmail.com> - 2012-10-16 19:13 -0400
                Re: Wiki reader "Paul E. Bennett" <Paul_E.Bennett@topmail.co.uk> - 2012-10-17 18:36 +0100
                Re: Wiki reader rickman <gnuarm@gmail.com> - 2012-10-17 13:48 -0400
                Re: Wiki reader "Paul E. Bennett" <Paul_E.Bennett@topmail.co.uk> - 2012-10-18 18:35 +0100
                Re: Wiki reader Hannu Vuolasaho <hannu.vuolasaho@nospam.tut.fi.invalid> - 2012-10-18 18:01 +0000
                Re: Wiki reader "Paul E. Bennett" <Paul_E.Bennett@topmail.co.uk> - 2012-10-18 19:37 +0100
                Re: Wiki reader Hannu Vuolasaho <hannu.vuolasaho@nospam.tut.fi.invalid> - 2012-10-19 08:43 +0000
                Re: Wiki reader rickman <gnuarm@gmail.com> - 2012-10-18 15:21 -0400
                Re: Wiki reader "Paul E. Bennett" <Paul_E.Bennett@topmail.co.uk> - 2012-10-18 21:37 +0100
                Re: Wiki reader Mark Wills <markrobertwills@yahoo.co.uk> - 2012-10-18 13:48 -0700
                Re: Wiki reader visualforth@rocketmail.com - 2012-10-18 16:37 -0700
                Re: Wiki reader visualforth@rocketmail.com - 2012-10-18 16:50 -0700
                Re: Wiki reader rickman <gnuarm@gmail.com> - 2012-10-18 20:13 -0400
                Re: Wiki reader "Paul E. Bennett" <Paul_E.Bennett@topmail.co.uk> - 2012-10-19 19:28 +0100
                Re: Wiki reader rickman <gnuarm@gmail.com> - 2012-10-19 17:53 -0400
                Re: Wiki reader "Paul E. Bennett" <Paul_E.Bennett@topmail.co.uk> - 2012-10-19 23:24 +0100
                Re: Wiki reader rickman <gnuarm@gmail.com> - 2012-10-19 18:39 -0400
                Re: Wiki reader rickman <gnuarm@gmail.com> - 2012-10-19 18:51 -0400
                Re: Wiki reader "Paul E. Bennett" <Paul_E.Bennett@topmail.co.uk> - 2012-10-20 09:48 +0100
                Re: Wiki reader Mark Wills <forthfreak@gmail.com> - 2012-10-20 02:59 -0700
                Re: Wiki reader visualforth@rocketmail.com - 2012-10-20 10:08 -0700
  Re: Wiki reader Ian Osgood <iano@quirkster.com> - 2012-10-20 11:21 -0700
    Re: Wiki reader visualforth@rocketmail.com - 2012-10-20 11:55 -0700

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