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" To: 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 > > -- > http://www.piclist.com hint: The PICList is archived three different > ways. See http://www.piclist.com/#archives for details. > > -- > http://www.piclist.com hint: The PICList is archived three different > ways. See http://www.piclist.com/#archives for details. > > > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.