I'm trying to get the serial port on my 8051 to work but the code seems to freeze at the point where the check for TI high is. If I leave the port config as it defaults to and just mov a value directly to sbuf without checking to see if ti is set, the port works.

the code i have been using is as follows:

For 19200 baud in mode 1

mov 02h,#ffh
mov scon,#0eh
mov tmod,#20h
mov th1,#f0h
mov pcon,#80h
clr ti
mov sbuf,02h
nop
jnb ti,$(line above)
sjmp (rest of programme)

please help. I'm desperate!

Chris