| ??? 10/06/05 14:09 Read: times |
#102031 - explanation Responding to: ???'s previous message |
hi,
Jan Waclawek said:
Well, I think they don't wait until end of stopbit as that's not defined, but that's only a detail (or maybe I just misunderstood the "2/4/6/stop" - I would write "0/2/4/6").
I just explain my sentence: autobaud: ; autobaud with timer 2
MOV T2CON,#00h
jb P3.0,$ ; wait for start bit
jnb P3.0,$ ; wait for data bit 0 'H'
mov TL2,#00h
mov TH2,#00h
SETB TR2 ; start timer
MOV R0,#03h
auto_bit:
jb P3.0,$ ; wait for data bit 1/3/5 Low
jnb P3.0,$ ; wait for data bit 2/4/6 High
djnz R0,auto_bit
jb P3.0,$ ; wait for data bit 7 Low
jnb P3.0,$ ; wait for stop bit High
clr TR2 ; stop timer
They do wait not for end of stop bit but for start of stop bit. Regards, Oleg |
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