Instructions

Chapter 2 Command System RIGOL
DS1000Z-E Programming Guide 2-47
Parameter
Name
Type
Range
Default
<n>
Discrete
{1|2}
--
<tmo>
Real
Refer to Explanation
1.00us
Explanation  The timeout time should be greater than the maximum pulse width of the clock and
lower than the idle time between frames.
 This command is only valid in the timeout mode (:DECoder<n>:SPI:MODE).
Return
Format
The query returns the timeout time in scientific notation.
Example
:DECoder1:SPI:TIMeout 0.000005 /*Set the timeout time to 5us*/
:DECoder1:SPI:TIMeout? /*The query returns 5.000000e-06*/
:DECoder<n>:SPI:POLarity
Syntax :DECoder<n>:SPI:POLarity <pol>
:DECoder<n>:SPI:POLarity?
Description Set or query the polarity of the SDA data line in SPI decoding.
Parameter
Name Type Range Default
<n> Discrete {1|2} --
<pol> Discrete {NEGative|POSitive} POSitive
Explanation
 NEGative:
. The low level is 1.
 POSitive: . The high level is 1.
Return
Format
The query returns NEG or POS.
Example
:DECoder1:SPI:POLarity NEG ative /*Set the polarity of the SDA data line in SPI
decoding to negative*/
:DECoder1:SPI:POLarity? /*The query returns NEG*/
:DECoder<n>:SPI:EDGE
Syntax :DECoder<n>:SPI:EDGE <edge>
:DECoder<n>:SPI:EDGE?
Description
Set or query the clock type when the instrument samples the data line in SPI decoding.
Parameter
Name Type Range Default
<n> Discrete {1|2} --
<edge> Discrete {RISE|FALL} RISE
Return
Format
The query returns RISE or FALL.
Example
:DECoder1:SPI:EDGE FALL /*Set the instrument to sample data on the falling edge
of the clock in SPI decoding*/
:DECoder1:SPI:EDGE? /*The query returns FALL*/