Em 3/2/2010 17:01, Isaac Marino Bavaresco escreveu:
> Em 3/2/2010 16:23, Isaac Marino Bavaresco escreveu:
>   =

>> Em 3/2/2010 15:42, Dwayne Reid escreveu:
>>   =

>>     =

>>> Good day to all.
>>>
>>> I'm about to look at a project where I need to communicate with 3 =

>>> serial devices.  All 3 ports will be communicating at 38,400 =

>>> baud.  Although all three ports need to be able to receive data =

>>> simultaneously, transmission can be to one device at a time.
>>>   =

>>>     =

>>>       =

>> Too bad, if it was the contrary, two simultaneous receive and three
>> transmit, you could use some PIC18F or the new enhanced PIC16F with two
>> UARTS, plus one interrupt-driven transmit-only UART. At this speed it
>> would be hard to do software UART receiving, but transmitting would be
>> possible (using a large percentage of CPU time though).
>>   =

>>     =

> Worse, the new enhanced PIC16F devices with two UARTs are future
> products yet.
>
> More than one UART only in PIC18F (2 UARTS max.), PIC24H (2 or 4 UARTs)
> and PIC32 (2 or 6 USARTs).
>   =



I'm using the PIC32MX575F256H-80.

Oh! the joy of having 6 UARTs, 64k RAM, 256k of FLASH and 80 MIPS for
toying around.

All this for $6.25/unit @ 25 units at Digikey ($4.94/unit @1k according
to Microchip).

Don't forget that it is much easier to design a system when you don't
have to worry about lack of resources...


Regards,

Isaac


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