>
> On Jul 10, 2009, at 3:21 PM, Olin Lathrop wrote:
>
> AGSCalabrese wrote:
>> I want a PIC with two ADC inputs ( 10bits ) , 8 GPIO , a
>> timer ......     It can be as slow as molasses.   What is crucial to
>> me is that it is $5 or less:
>
> That's easy.  Plenty of PICs fit that.
>
>> that I can pick up a cheep and trivial
>> method of programming it ( $25 ) ;
>
> That severly limits any commercial offerings.  My LProg actually  
> fits this,
> http://www.embedinc.com/products, but it's for the 3.3V only PICs.
>
>> that I can get a cheep development
>> IDE with Basic or C or whatever ($ 25 )
>
> MPLAB is free.  This is such a simple application I don't understand  
> why it
> has to be Basic or C, but you can use some free compiler version  
> with little
> or no optimization since you don't care about speed or code size.
>
>> that it runs on 3.3 or 5 volts.
>
> That's all PICs I believe.
>
>> The bigger the physical size of the pins, the better.  DIP is
>> better than SOIC, etc.
>
> Plenty of PICs come in DIP, including some 3.3V 18F parts.
>
>> I want to quickly bang out a really creepy , dirty , data aquisition
>> device that samples two ADC inputs twice per second and talks to
>> another device via SPI  ( in, out, clk ) as the slave to a master.
>> There will be no demand on the PIC ; the SPI will be slow ( 1K bit  
>> per
>> second )  , with a total traffic of maybe 50 - 100 bits per
>> second ) .  The master will not bother the PIC for .25 seconds after
>> asking for status so there is plenty of time to complete an ADC  
>> cycle.
>
> Your requirements are somewhat contradictory.  This is apparently a  
> one off,
> so it doesn't make sense that everything be so cheap since you're only
> buying it once.
>
Olin  Thanks for the ideas.  No......  this is not a one off ( maybe  
100 ) , but it is competing with doing the same
thing with an SPI ADC and a SPI GPIO.  I would like to reduce the  
parts count because of the cheesy way
these will be assembled.  ( don't ask )  Maybe I can live with 3.3V.
Gus

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