Hardware SPI in 18F2620 ?

custom_elect · Joined: 15 Dec 2007 Posts: 13

Im just moving some working code from 16F877A PCM C 4.06
to:
18F2620 using PCH 4.069

It complains that:
#use spi (SPI1, MASTER)
is "Option invalid Not valid for H/W"

Yet 18F2620 has the same master capable MSSP like 16F877A

Anyone know why?

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

The #use spi() statement defaults to using "LSB_FIRST". But the
hardware SPI module uses MSB first. So to avoid getting this error
message, you have to put in the MSB_FIRST parameter in the #use spi
statement, when you use the hardware SPI module. Ideally, CCS
should fix this. It should default to MSB first.

Also, it wouldn't hurt if you specify a few more of the parameters
so that they aren't left as some unknown default value. Example: