9 bits or 8 bits parity=E

[Coni]

Hello

I need some help with a very basic issue. I'm trying to use the following code:

[asmallri]

[Coni]

Thanks for you answer.
But if I want to use 8 bits and even /odd parity ( in hyperterminal) it doesn't work either
Thanks

[Javiere]

I have de same problem:

I’ am developing a ModBus slave device and I need work with an interfaz RS-232 at 9600 bauds, 8 data bits, 1 even parity and 1 stop bit.

I utilise the PIC18F4620 with the CCS C compiler version 3.239.

My problem consists in that I can’t detect the parity errors.

My program utilizes the next code:

#use delay(clock=20000000,RESTART_WDT)
#use rs232(baud=9600,parity=E,xmit=PIN_C6,rcv=PIN_C7,bits=8,enable=PIN_C5,restart_wdt,errors,stream=HOST)
#bit parityError=rs232_errors.0

…….

#int_RDA
void RDA_isr ()
{
if (!parityError)
{
car = fgetc (HOST);
// processCar (car);
}
else
{
fgetc (HOST); // Discard the character.
}
}

With this code the transmission is Ok but in the reception y have a lot of wrong characters that look like good viewing with the oscilloscope.

¿Have you got any example that shows the use of the check of the parity error?

Thank you very much.

[PCM programmer]

The parity is calculated in software by the CCS fgetc() function.
So you have to call fgetc() first, in order to get the parity information.
Example: