Subject:
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Re: pa7 9600 serial output
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 16 Feb 1998 14:49:35 GMT
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Original-From:
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Fred G. Martin <FREDM@saynotospamMEDIA.MIT.EDU>
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Viewed:
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1371 times
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> Hi, I'm trying to interface the FerretTronics Servo Controller Chip FT639,
> to the handyboard
> using PA7. How can i modify the pa7_9600.asm file to transmit at 2400 baud?
You have to re-write the bit_delay loop to take up four times as much
time. Just multiply the delay count value by four, e.g., "LDAB #148".
Fred
(following is the 9600 code.)
* take up 0.1042 millisecs
* 208 cycles
bit_delay
LDAB #37
bit_loop
DECB ; 2 cycles
BNE bit_loop ; 3 cycles
RTS
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Message is in Reply To:
 | | pa7 9600 serial output
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| Hi, I'm trying to interface the FerretTronics Servo Controller Chip FT639, to the handyboard using PA7. How can i modify the pa7_9600.asm file to transmit at 2400 baud? thanks, phet (27 years ago, 15-Feb-98, to lugnet.robotics.handyboard)
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