> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On
Behalf
> Of IVP
> Sent: 10 August 2011 15:00
> To: Microcontroller discussion list - Public.
> Subject: Re: [PIC] Continuous SPI transmission
>=20
> Ah,
>=20
> just checked through an errata (80443E) and it looks like SPITBF
> is a silicon issue. I've got two batches - $3002 revision, date code
> 0909 and $3003 revision, date code 1114. They're both mentioned,
> so are a heap of others, so looks like I'll have to use delays. Bugger
>=20

It seems nothing has changed at Microchip then.  I have yet to find
another vendor that consistently releases parts with as many problems as
Microchip.

The errata suggests you can work around the problem by polling the
SPITBF until it gets set, and then polling until it's cleared e.g.

send_w0:
           btsc    SPI1STAT,#SPITBF  ; wait for SPITBF to clear
           bra     $-2
           mov     w0,SPI1BUF        ; load SPI buffer
           btss    SPI1STAT,#SPITBF  ; wait for SPITBF to get set
           bra     $-2
           return

Cheers

Mike

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