In SX Microcontrollers, SX/B Compiler and SX-Key Tool, peterverkaik wrote:

Samuel,
The SX/B shiftin/out is only master mode.
The SPI VP's are here (spim.src and spis.src)
[url=http://www.sxlist.com/techref/ubicom/virtperf.htm]http://www.sxlist.com/techref/ubicom/virtperf.htm[/url]

The M/LSBPRE/POST are handled by setting up a cmd byte
from spis.src:
;	SPIS supports 4 commands, specified by the 4 MSBits of the 
;	SPIS_CMD byte:
;
;		$1	- GET BYTE in SLAVE mode, define FALLING edge
;		$5	- GET BYTE in SLAVE mode, define RISING edge
;		$9	- SEND BYTE in SLAVE mode, define FALLING edge
;		$D	- SEND BYTE in SLAVE mode, define RISING edge
;
from spim.src
;	SPIM supports 4 commands, specified by the 4 MSBits of the 
;	SPIM_CMD byte
;
;		$3	- GET WORD in MASTER FAST mode, define FALLING edge;
;		$7	- GET WORD in MASTER FAST mode, define RISING edge;
;		$B	- SEND WORD in MASTER FAST mode, define FALLING edge;
;		$F	- SEND WORD in MASTER FAST mode, define RISING edge.
;

However, if you only need master mode, SX/B is much simpler to use.
regards peter

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