Larry,
Send me a copy.  The next time I update PICUART.ASM I will
include the 16F628 stuff as well.

I am glad that you found my PICUART.ASM file helpful in getting
your 16F628 to work with the UART.

Fr. Thomas McGahee

----- Original Message -----
From: "Larry Kayser" <kayser@SYMPATICO.CA>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Saturday, January 26, 2002 10:05 AM
Subject: 16F628 USART in ASM


> Greetings:
>
> I have for some days been struggling with achieving consistent and
accurate
> serial port operation, especially when the Interrupts are being hit at a
> high rate.  The APNOTE from MICROCHIP does not work most of the time and
> never worked properly.  However a fine piece of work by Tom McGahee,
> PICUART.ASM for the 16C74A should be adaptable to the 16F628.
>
> It was adaptable and works like a charm.  I have now tried this with the
> following Oscillator configurations.  For the 16F628, the Internal 4 MHz,
> an external 4 MHz crystal, a 1.8432 MHz crystal and with a high speed
> 16F628 it ran just fine with a 21.7 MHz crystal.
>
> I will send any and all who ask a copy of this ASM file, which I happen to
> call PIC8_4B.ASM, configured to run on a 4 MHz crystal or 4 MHz internal
> oscillator by just compiling it with MPASM.
>
> I will decline to express my thoughts about Microchip documentation and
> product support.  It is suffice to say that my first copy of CPM-80, the
> one with both handwritten and typewritten documentation from Gary Kendall
> about 1976/7 was of higher quality and vastly more accurate than what I
> have received from Microchip for the 16F628.
>
> Larry Kayser
> VA3LK
>
> --
> http://www.piclist.com hint: To leave the PICList
> mailto:piclist-unsubscribe-request@mitvma.mit.edu
>
>

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu