Re: Need Advice please: microcontroller with RS-232 Output


"martin griffith" <martingriffith@xxxxxxxxxxxxx> a écrit dans le message de
news: kd7mm1paqvsvrst7p58i5fvu8d212v2pun@xxxxxxxxxx
> On Thu, 3 Nov 2005 20:21:30 -0500, in sci.electronics.design "alx3d"
> <alx3d@xxxxxxxxxxx> wrote:
>
>>I need some advice in designing a pushbutton interface to send commands
>>via
>>RS-232 port.
>>
>>I need to find a microcontroller that will take pushbutton inputs and send
>>the proper commands (Sony Protocol of remote-1) via RS-232 to a digital
>>video recorder board.
>>
>>Any advice on the proper microcontroller that I have to use?
>>
>>Thank's in advance for your help!
>>
>>Alex
>>
>>ELECTRICAL INTERFACE:
>>- EIA RS-422
>>
>>DATA FORMAT :
>>- 38.4 kbps
>>- Asynchronus, full duplex communications
>>- 8 data bits, odd parity, 1 stop bit.
>>
>>COMMAND BLOCK FORMAT
>>---------------------------------------------------------------------------------------------------------------------
>>| 1 byte | 1 byte | 1 byte
>>| n-2 byte | 1 byte | 1 byte |
>>| Bits 7-4 Bits 3-0 | |
>>| | |
>>|
>>---------------------------------------------------------------------------------------------------------------------
>>| CMD-1 | DATA | CMD-2 | DATA-1
>> | - - - | DATA-n | CHECKSUM |
>>| | COUNT | |
>>| | |
>>|
>>---------------------------------------------------------------------------------------------------------------------
>>
> I did this in the early 90's with an 8052, no problems. we even did 2
> machine frame accurate video editing, by multiplexing the serial port.
>
>
>
> martin



Thanks to all for your very appreciate help!

Alex


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