is hserin slow?

[picnaut]

Hi,

I think that RCREG can only "hold" 2 bytes.
If you don't retrieve your data before that 3rd byte comes along, you get an overrun or something. It probably just kicks the first byte it received "off the end".

[mister_e]

YUP! RCREG is a 2 byte buffer. This help to miss character.
You don't need to read always 2 bytes ... well yes and no. Just make a check if the RCREG is now empty will suffice.

and you just need to send 1 bytes at the time as TXREG is a single 1 byte register.

HTH

[arniepj]

Here is a couple attached demo programs that might help,written for the 16F877.Modify for you needs.One uses the on interrupt command and the other the interrupt flag.

[markedwards]

Thank You all!

I was frustrated and a little weary but your suggestions were
timely and very helpful. My serial communications are working now.

Reading RCIF & RCREG appear much faster than HSERIN.

Thanks,

Mark

[mister_e]

It's like many built-in function.
HSERIN/HSEROUT
HPWM
ADCIN
are some in the list. When you need for speed, the best way is still acess the internal register. It also produce tighter code. Built-in function are great when you don't want to break your nuts with data handling and ... and ... and.. well you know what i mean