From: Rob Sacks (editor_at_realization.org)
Date: 2000-10-21 16:46:38
Joerg,
One more thing I need to know. Does the synch byte
increment by 1 each time? I.e., 1..2...3..4.. etc.
Or is it something more complicated?
Regards,
Rob
----- Original Message -----
From: "Joerg Hansmann" <jhansmann_at_g...>
To: <buildcheapeeg_at_egroups.com>
Sent: Saturday, October 21, 2000 10:39 AM
Subject: [buildcheapeeg] Software
> Hi Rob and everyone,
>
> <yaniv_vi_at_yahoo.com> wrote:
> >software :
> >rob sacks is working has finished a pre-beta version of his software .
> >it does mind mirror and includes phase coherence.
> >it lookes very nice.
>
>
> I have written the firmware for the Atmel-Processor (AT90S4433)
> in the RS232EEG Prototype board and tested it with a terminal program.
> For more testing however I need some sort of visualization.
> (best oszilloscope-like AD-Value(y-axis) over time(x-axis)).
> Protocol/transmission errors should be recorded for debugging purposes.
>
> Could you implement the following communication protocol ?
>
> The Atmel-processor transmits 200 times per second the following data block
> to the PC:
> $a5 :1. sync byte
> $5a :2. sync byte
> $01 :version byte
> ch1_low_byte
> ch1_high_byte
> ch2_low_byte
> ch2_high_byte
> ch3_low_byte
> ch3_high_byte
> ch4_low_byte
> ch4_high_byte
> ch5_low_byte
> ch5_high_byte
> ch6_low_byte
> ch6_high byte
> switches: 1 byte digital inputs (PD2..PD5) in the lower 4 bits.
>
> all together 16 byte.
>
> From the AD-channel-data only the lower 10 bit are used as unsigned
> integer.
> The remaining 6 high bits are 0.
>
> RS232 transmission parameters are:
> 1 startbit, 8 data bits, 1 stopbit, no parity, 57600 baud
>
> At the moment communication direction is only from Atmel-processor to PC.
> The hardware however supports full duplex communication. This feature
> will be used in later firmware releases to support the PWM-output and
> LED-Goggles.
>
>
> best regards,
>
> Joerg Hansmann
>
>
>
>
>
>
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>
>
>
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