correct baudrate setting?

[davt]

Hi all

I am trying to set up the baudrate in a 16F767 running at 16.0 mhz, to 250 000.

Can someone please confirm that I have got my settings right from the code below:

spbrg=0x00; // set up
brgh=low; // baudrate to 250.000
sync=0; // enable asynchronous reception
spen=1; // serial port enabled - rc7/rx/dt , rc6/tx/ck pins as serial port pins
rx9=1; // 9 bit reception

Many thanks.

Dave

[SherpaDoug]

Why not:
#use rs232(baud=250000,xmit=rc7,rcv=rc6)

The compiler has no problem with oddball baud rates.
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[davt]

Hi Doug

Thanks for your reply.
I need to use the internal hardware usart, I thought the # use rs232 was the software usart?
But any way I want to use the settings:

spbrg=0x00; // set up
brgh=low; // baudrate to 250.000
sync=0; // enable asynchronous reception
spen=1; // serial port enabled - rc7/rx/dt , rc6/tx/ck pins as serial port pins
rx9=1; // 9 bit reception

Will these settings give me 250.000 baudrate @ 16.000 mhz.

Thanks again
Dave

[John Morley]

Dave,

The #use rs232 statement works for both hardware AND software USART's. The compiler recognizes that you want to use the hardware USART if:

1. the device supports a hardware USART
2. you have specified the hardware USART pins

Otherwise the compiler just creates a software USART with the pins specified.
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John Morley

[davt]

Hi John

How do I incorporate 9th bit reception?

Many thanks.

Dave

[John Morley]

Dave,

One of the options in the #use rs232 state will do this. Insert Bits=9

#use rs232(baud=9600, xmit=PIN_A2, rcv=PIN_A3, bits=9, .......)

Valid number for Bits= range from 5 to 9.

Good Luck!
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John Morley