AVR-Chat

--- In AVR-Chat@yahoogroups.com, "Dave McLaughlin" <dave_mclaughlin@...> wrote:
>
> Hi there,
> 
>  
> 
> What is the input to the RF transmitter? Does the RF transmitter have
> onboard encoding to handle the air interface? IE, does to take your data and
> convert it to some form of RETURN TO ZERO format such as Manchester encoding
> or PWM?
> 
>  
> 
> Do you have a datasheet link to the RF module you are using? It would be
> useful to know what the module is expecting and help us figure out what you
> need.
> 
>  
> 
> There is a nice little intro to serial communications here that explains the
> use of the parity bit. It is a very simple way to check bytes for simple
> errors but not reliable enough to guarantee good communications. Better to
> use some form of CRC or other error correcting as part of your telegram.
> 
>  
> 
> http://www.taltech.com/TALtech_web/resources/intro-sc.html
> 
>  
> 
>  
> 
>  
> 
> From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf
> Of iijfet
> Sent: 18 August 2009 13:25
> To: AVR-Chat@yahoogroups.com
> Subject: [AVR-Chat] 4800bps to 9600
> 
>  
> 
>   
> 
> hi friends,
> i want to convert baud rate of input data from a medical module.
> my data is 60 packet per second & every packet includes 5 bytes.
> this is also 8 data,1 stop & odd parity. 
> therefore,my data is 4800bps & i must convert it to 9600bps because of my RF
> module.
> my RF module can transmit a data that is 9600bps with odd parity,but it cant
> transmit 4800bps with odd parity correctly & when it transmits this data
> some byte cant be transmitted such as 45 or 7F(hexa).
> also i wanna to know how odd parity work & what is its detail. 
> 
> 
> 
> [Non-text portions of this message have been removed]
>
my RF is HM-TR :
http://www.hoperf.com/pdf/HM-TR_EN.pdf
http://www.hoperf.com/tools/HM-TR_SETUP.exe
 the data which i explain it, is transmited by a medical module & i wanted to send it to  RF module,but it needs a micro to convert baud rate.