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Messages - harsha

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Off-Topic (Read Only) / serial communication
« on: April 17, 2008, 02:57:34 am »
I am trying to communicate with my hardware using P89V51RD2 microcontroller. when i send the inputs using matlab, it doesn't waits for the input, instead it starts executing the rest of the code..

the code can be something like this, this is a test code where i am sending inputs from my pc which will be displayed on the LEDs connected to port1:

.org 0h
MOV TMOD, H'20 ; timer 1 in mode 1 8 bit autoreload
MOV TH1, h'fd; 9600 baud rate
MOV SCON, H'50; 8-bit 1 stop bit
SETB TR1
clr ri
rpt: jnb ri, rpt
mov a, sbuf
mov p1, a
.end

do i need to consider something else?

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