SPI Validation

SPI driver validation. More...

Content
	Configuration
	SPI Server
	Tests

Description

The SPI validation performs the following tests:

• API interface compliance
• Data exchange with various speeds, transfer sizes and communication settings
• Event signaling

Two Test Modes are available: Loopback and SPI Server.

Test Mode : Loopback

This test mode allows only limited validation of the SPI Driver.
It is recommended that this test mode is used only as a proof that driver is good enough to be tested with the SPI Server.

For this purpose following Default settings should be used:

• Slave Select: Not used
• Clock / Frame Format: Clock Polarity 0, Clock Phase 0
• Data Bits: 8
• Bit Order: MSB to LSB
• Bus Speed: same as setting for the SPI Server
• Number of Items: 32

To enable this mode of testing in the DV_SPI_Config.h configuration file select the Configuration: Test Mode: Loopback setting.

Required pin connection for the Loopback test mode:

Note

In this mode following operations / settings cannot be tested:

• SPI slave mode
• Slave Select line functionality
• operation of the Receive function
• data content sent by the Send function
• clock / frame format and bit order settings
• data bit settings other then: 8, 16, 24 and 32
• event signaling

Test Mode : SPI Server

This test mode allows extensive validation of the SPI Driver.
Results of the Driver Validation in this test mode are relevant as a proof of driver compliance to the CMSIS-Driver specification.

To perform extensive communication tests, it is required to use an SPI Server running on a dedicated hardware.

To enable this mode of testing in the DV_SPI_Config.h configuration file select the Configuration: Test Mode: SPI Server setting.

Required pin connections for the SPI Server test mode:

Note

Slave Select line has to be pulled to Vcc by an external pull-up (for example 10 kOhm).

To ensure proper signal quality:

• keep the connecting wires as short as possible
• if possible have SCK and GND wires as a twisted pair and MISO, MOSI and Slave Select wires separate from each other
• ensure a good Ground (GND) connection between SPI Server and DUT

If you experience issues with corrupt data content try reducing bus speed.