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VHDLIntermediate

Testbench: SPI mode-0 transmitter (VHDL)

Verify clock edges, MSB-first order and transaction completion.

Exercise objective

The DUT serializes data according to the SPI protocol.

Prerequisites

  • Understand SPI mode 0: idle polarity, sampling edges and chip selection.
  • Generate a clock, apply reset and compare signals in a VHDL testbench.

Skills you will practice

  • Check the relationship between the SPI clock and MOSI data.
  • Check MSB-first ordering and completion of a full transaction.
  • Build self-checking assertions for control signals.

Equipment and tools

  • The VHDL editor and validation are available in the browser. You do not need an FPGA board for this exercise.

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