There is no problem having both EEPROM and MAX3100 on the SPI bus.

/Patric

-----Original Message-----
From:   Mahmood Elnasser [SMTP:mahmood@IST.CO.ZA]
Sent:   den 5 december 2001 19:05
To:     PICLIST@MITVMA.MIT.EDU
Subject:        Re: PIC with 2 serial ports

Thanx andre , i forgot about the eeprom , i have to include it in my new
design now . so  farewell to the spi to rs232 . i will try the interrupt
method and let you know .

----- Original Message -----
From: "Andre Abelian" <engelec@EARTHLINK.NET>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Wednesday, December 05, 2001 7:13 PM
Subject: Re: PIC with 2 serial ports


> Hi.
>
> I am working on similar project with 16f873 that I needed 2 uart one
> Of them goes thru max232 19200 buad rate and the other one just receive
> data at 9600 Buad rate. Since I am using i2c bus too to communicate with
> 24lc128
> Eeprom I decided to use max4599 multiplexer which has 2 input one output
> And control pin. In my application 2 uarts never going to work together
> So having multiplexer to switch back and forward works for me. If you
> figured it out different method other then spi or what I did please
> Let me know maybe you are going to find better way of doing it.
> Hope this helps
>
> Andre Abelian
>
>
> Hi All
> i'm using pic16f876 with 2 serial ports , i used the built in usart for
> com1
> and used the software method in microchips application note for com2 ,
> it
> worked fine but i'm not happy with the program, it  ties me up and can't
> use
> the rest of the program freely .
> I'm trying to make the other serial port by RB0 interrupt , when the
> interrupt ocurs it sets the TMR0 to take 3 samples of the serial input
> bits
> to read and verify for errors , then i read it till the byte has been
> received , then move it to the receive buffer and set a flag if EOT  has
> been received. I check this flag in the main program loop and take
> action .
> I found out that there is another method to use the MAX3100 SPI to RS232
> convertor chip , at slightly increased cost i can free my interrupt pin
> and
> TMR0 for other stuff .
> Any ideas , comments , suggestions are welcome .
> Thanx all
>
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