More data Steve,
Datarange in my project:
2400 Baud up to 9600 Baud (UART) or manchestercode !
I do with the UART for 50% Duty Cycle (Receiver with AGC) a little trick.
I splitt a byte in 2 parts and send it as 4 bit, so i have 50%(+-?).
Startbit,blank,bit1,blank,bit2,blank,bit3,blank,bit4,stopbit....
MOV A,BYTE 1.part
ANL A,#10101010b
RLA
MOV SBUF,A
......
MOV A,BYTE 2.part
ANL A,#01010101b
MOV SBUF,A
......
the advantage is i can use the UART to
receive the data (and the interrupt)
Sascha