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serial communication 8051

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arun_9998

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hello all
i communicate two MCU 1200bps via RF TX/RX modules
i am facing some problem that at transmit time the system halt for some milisec.
so plz. help me how can i interrupt driven rut line for transmit
 

arun_9998 said:
so plz. help me how can i interrupt driven rut line for transmit
Click to expand...

Can you be clear "driven rut line for transmit"?

Do you want to know how to write interrupt routine?

---------- Post added at 16:16 ---------- Previous post was at 15:55 ----------

Procedure is as follows:

1. write value to SBUF;
2. Wait for a while by checking user defined flag, until the interrupt gets triggered.
3. Once the interrupt triggered, in the interrupt routine, check the interrupt is because of RI or TI.
4. If it is TI, then clear the flag as well as set user defined flag and exit. Otherwise copy the SBUF content to some global variable and clear the flag as well as set user defined flag and then exit

My recommendation is, if you are 2 microcontrollers, then it is better to divert 2 GPIO's for RTS and CTS or some request and acknowledge.
 

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