Interrupt Driven Serial Input using DT_Ints?

[circuitpro]

Can someone please point me to a link or example of how to make an interrupt-driven serial input buffer (hserin) for use with DT_Ints? I have had an interrupt jump to and receive an entire string of characters, but I've got too much going on for that, and will have to receive the string one character at a time, and put the command together when there's time. Any example would get me started. Thanks

[Darrel Taylor]

Here's one where I modified Joe's serial backback program for use with DT_INTS.

http://www.picbasic.co.uk/forum/show...8336#post28336

[circuitpro]

Thanks very much, Darrel!

[circuitpro]

I am having some kind of issue getting these two uarts set up right. I'm using a PIC18F6722 running at 40MHz. UART1 runs perfectly fine at 115K, but UART2 just can't hack it. (If I lower the baudrate to 57600, it works fine). Besides setting the pin directions, I am using the setup resulting from the PIC Multicalc as follows:

'EUSART 1 (RS422 LINK)
DEFINE HSER1_RCSTA 90h
DEFINE HSER1_TXSTA 24h
DEFINE HSER1_CLROERR 1
DEFINE HSER1_SPBRG 86
SPBRGH1 = 0
BAUDCON1.3 = 1

'EUSART 2 (RS485 LINK)
DEFINE HSER2_RCSTA 90h
DEFINE HSER2_TXSTA 24h
DEFINE HSER2_CLROERR 1
DEFINE HSER2_SPBRG 86
SPBRGH2 = 0
BAUDCON2.3 = 1

I am not doing anything fancy, just trying to get both ports to transmit and receive at 115k - one at a time. No interrupts, nothing fancy.

Can anyone tell me why HSERIN2 fails to work when HSERIN1 works at this baudrate?

[Darrel Taylor]

I'm not sure how you got EUSART1 working.

There are no HSER1_ defines.
They are just HSER_ for the first EUSART, and HSER2_ for the second.

[circuitpro]

The datasheet for the pic just refers to TCSTAx, and at first I was setting them up with HSER_RCSTA and HSER2_RCSTA, but out of mass frustration, thought I would see if it should really be HSER1 & HSER2. (Once again, it's logical, but wrong!)

Do you see any reason uart2 isn't working at 115k?