Re: [Flashforth-devel] PIC18fxxk90

[<zd...@al...>]

No, it didn't work for UART2. Transmit didn't work because the 
initialization was missing. You should just add #ifs and #endifs:

         movlw   spbrgval
;        movwf   SPBRG, A
	banksel	SPBRG2
         movwf   SPBRG2, BANKED
; TX enable
         movlw   b'00100100'
;        movwf   TXSTA, A
	banksel	TXSTA2
         movwf   TXSTA2, BANKED

Receive didn't work because RX2 is also an analog pin and while UART 
takes care about TRIS setting, analog pin takes priority. This is 
(probably) correct code:

; RX enable
#if UART == 1
#ifdef ANSELH
#ifdef ANS11
         bcf     ANSELH, ANS11, A ; Enable digital RB5 for RX(1)
#endif
#endif
#ifdef ANSELC
#ifdef ANSC7
         banksel ANSELC
         bcf     ANSELC, ANSC7, BANKED   ; Enable digital RC7 for RX(1)
#endif
#endif
#else
         banksel ANCON2
         bcf     ANCON2, ANSEL18, BANKED   ; Enable digital RG2 for RX2
#endif

Funny thing is that databook is totally misleading:

"In order to configure these pins as an EUSART: ... For EUSART2: ... 
TRISG<1> bit must be cleared (= 0) for Asynchronous ..."
Not true, and they admit it almost immediately. ;-)
"Note: The EUSART control will automatically reconfigure the pin from 
input to output as needed."
That's true, but it won't reconfigure this pin from analog to digital, 
and it is nowhere mentioned in UART chapter that you shoud do it.

Mikael, give me your address so I can send you a PCB with 18F66K22 (or 
65K90 if you prefer). It is pretty weird that I'm the only one in the 
whole world using this with FF, hope somebody else will join and find 
more use for all this.

Zdravko