helloo
- 11th February 2012, 17:48
Hello Folks,
I'd like to build my own serial communication protocol with rs485. Therefore I have to send the data in 9 bit mode.
Example:
first byte + 9th bit set -> that's the adress of the slave
all other bytes are send without the 9th bit set to indicate they're no adress bytes.
Question: How can I set the 9th bit manually?
my code so far:
DEFINE HSER_BAUD 19200 'Set Baud rate to 19200bps
DEFINE HSER_BITS 8 'Set to 8 bit mode
DEFINE HSER_EVEN 1 'Set Even Parity
DEFINE HSER_CLROERR 1 'Clear overflow error automatically
... some other code ...
HSEROUT [Slaveadress,Datalength,Databyte,Databyte ...until datalength reached...]
I will change the line:
DEFINE HSER_BITS 8 'Set to 8 bit mode
into:
DEFINE HSER_BITS 9 'Set to 9 bit mode
But how can I set the 9th bit????
Regards.
I'd like to build my own serial communication protocol with rs485. Therefore I have to send the data in 9 bit mode.
Example:
first byte + 9th bit set -> that's the adress of the slave
all other bytes are send without the 9th bit set to indicate they're no adress bytes.
Question: How can I set the 9th bit manually?
my code so far:
DEFINE HSER_BAUD 19200 'Set Baud rate to 19200bps
DEFINE HSER_BITS 8 'Set to 8 bit mode
DEFINE HSER_EVEN 1 'Set Even Parity
DEFINE HSER_CLROERR 1 'Clear overflow error automatically
... some other code ...
HSEROUT [Slaveadress,Datalength,Databyte,Databyte ...until datalength reached...]
I will change the line:
DEFINE HSER_BITS 8 'Set to 8 bit mode
into:
DEFINE HSER_BITS 9 'Set to 9 bit mode
But how can I set the 9th bit????
Regards.