Bob,

> Try putting nops in like this:
>
>      bsf portc,scl
>      nop
>      bsf portc,sda
>      goto $+1
>      bcf portc,scl
>      nop
>      bcf portc,sda
>      goto $-5

The original I2C code goes like this (a part of it).

txbyte		movlw .8
		movwf bitctr
		btfss txbuf,7
		goto $+3
		bsf iicport,sda
		goto $+3
		bcf iicport,sda
		goto $+1
		goto $+1
		bsf iicport,scl
		goto $+1
		goto $+1
		bcf iicport,scl
		rlf txbuf,same
		decfsz bitctr,same
		goto $-0Dh
		bsf iicport,scl
		bsf iicport,sda
		retlw 0


> If it works then it is probably a read-write-modify issue, which occurs
> when a pin hasn't changed enough before the next bcf or bsf happens.

This code would work for me on 16C54's years back.

Cheers

Ravi
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