Subject:
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Re: brickos 090 problem no program download with CONF_LNP_FAST
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Wed, 30 Apr 2008 12:50:48 GMT
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Viewed:
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26907 times
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Hello Bernhard,
>
> 4) using now the serial tower
>
> download a program with dll 2400 to rcx using the brickOS.srec 2400
> sucess
> download a program with dll 4800 to rcx using the brickOS.srec 2400
> no sucess
>
> download a program with dll 2400 to rcx using the brickOS.srec 4800
> no sucess
> download a program with dll 4800 to rcx using the brickOS.srec 4800
> no sucess
>
> interesting because i thing there must be a option to change the usb tower to
> 4800 baud but how ?
I just checked the source code. There is no speed setting for usb
tower in the code. If you look into firmdl3 you also find that fast
mode is disabled for USB, because it doesn't work. I think the USB
tower sends at 2400 baud and there is no known way to change it.
Remember that 4800 baud mode was never used by the official LEGO
firmware or download programs.
I have no idea how you can change baud rate (is this even possible?)
or carrier frequency on the USB tower. AFAIK the transmit carrier
frequency on the RCX is set by carrier_init in lnp-logical.c to 38
KHz. If I understand Dick Swan's post right, one should change it to
76 KHz for RCX 2.0. I think it should be possible by setting T1_CORA
to 0x0D instead of 0x1A.
Best regards,
Jochen
--
Jochen Hoenicke, http://hoenicke.ath.cx/rcx/
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