pic16f627 with different baudrates

Oct 08, 2007 2 Replies
R

Hi!



I am a newbee of using PIC USART and internal clock.



I am developing a program that will send a data to an instrument to enabl it to send an output to the PC via RS232. The problem is, my hardware ha



8 channels with different instruments which run with different baudrates The data sent is similar on all channels. How could i send the correc data to the corresponding channel which i am not sure what baudrate t use? Is it possible for me to constantly change different baudrates afte i send a data to each channel since different instruments have differen data request. What i am going to do? Do you have any idea. Too, i am usin the inaccurate internal clock since i am running out of ports.

Your response is highly appreciated. Thank you so much.


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N

Yes you can change the baud rate if you know the correct rate for each instrument. You will most likely needed a crystal the PIC internal oscillator is not accurate enough. You will need a bigger chip or some type of I/O expander

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D

So that's 9 UART channels total, 1 PC plus 8 instruments, and your PIC has 1 UART and nothing to multiplex that 1 UART. All that plus an inaccurate baud clock to boot.

One thing you could do that might pay off would be rethink your hardware architecture.

Dan Henry
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