SPI

The SPI (Serial Peripheral Interface) panel provides users with SPI serial communication testing. You can set the SPI mode and transmission rate to perform full-duplex communication with peripheral devices.

Supported Products and Ports

This function supports devices equipped with an SPI interface. Please confirm the corresponding port (Port) number according to your device model:

Product Name	Port
USB-DAQ-F1-AD	2
USB-DAQ-F1-CD	2
USB-DAQ-F1-D	1~2
USB-DAQ-F1-RD	2
USB-DAQ-F1-TD	2

Parameter Settings

SPI Mode

Four standard SPI modes are supported, determined by the clock polarity (CPOL) and clock phase (CPHA):

Mode	Clock Polarity (CPOL)	Clock Phase (CPHA)
0	0 (Idle Low)	0 (Leading Edge)
1	0 (Idle Low)	1 (Trailing Edge)
2	1 (Idle High)	0 (Leading Edge)
3	1 (Idle High)	1 (Trailing Edge)

Operation Description

Button/Parameter	Description
SPI Rate	Set the SPI clock rate (maximum 1 MHz).
CS Pin	Select the chip select pin (Chip Select) to be used; the specific definition depends on the product specifications.
Bytes to Read	Set the length of data to be read (Byte).
Write	Send data to the SPI device (Write only).
Read	Receive data from the SPI device (Read only).
Write+Read	Full-duplex operation: read back data while writing data.