User Guide (APB3/APB4 VIP)

Choosing master/slave/passive

The VIP is built from:

• Master agent (sequencer + driver + monitor)
• Slave agent (responder + monitor)
• Passive monitor (monitor only)

See kvips/apb/examples/uvm_back2back/tb/tb_pkg.sv for a reference environment that instantiates:

• 1 active master agent
• 1 active slave agent (simple memory model)
• 1 monitor (enabled on master agent only to avoid duplication)

Common knobs

Protocol mode

• +APB_PROTOCOL=APB4 (default)
• +APB_PROTOCOL=APB3

Back-to-back style

• Drop PSEL between transfers (default): cfg.drop_psel_between = 1
• Continuous mode: cfg.drop_psel_between = 0

Wait-states (slave)

• Enable/disable: cfg.allow_wait_states
• Range: cfg.min_wait_cycles, cfg.max_wait_cycles

Error injection (slave)

• Enable: cfg.slverr_enable
• Probability (0..100): cfg.slverr_pct
• Address range: cfg.slverr_start, cfg.slverr_end

APB4 extras

• Randomize PPROT: cfg.randomize_pprot
• Randomize PSTRB: cfg.randomize_pstrb

Debug

Logging

Enable the per-transaction trace prints (example TB wiring):

• +VIP_TRACE

Waves (FSDB/VCD)

Enable waves via:

• +KVIPS_WAVES

For FSDB on Questa, use:

• make -C kvips/apb/examples questa-waves ...

Assertions

See kvips/apb/docs/assertions.md for assertion switches.