CTU-CAN-FD

VHDL naming/coding-style conventions enforced across this repo's RTL (src/) and testbench (test/, excluding test/main_tb/iso-16845-compliance-tests) — prefixes for processes, instances, generate statements, generics, constants, types, FSM states, and signal/register naming idioms. Load this to check whether new or existing VHDL code in this repo follows the established style, or before renaming/refactoring identifiers. Triggers on: naming convention, coding style, style check, lint, p_ prefix, i_ prefix, g_ prefix, G_ generic, C_ constant, t_ type.

Architecture map of the CTU CAN FD VHDL testbench in test/main_tb — TB hierarchy, the 10 VIP agents and their communication protocol, feature-test conventions, reference-test flow, and functional coverage mechanism. Load this before writing/modifying a feature test, touching an agent under test/main_tb/agents, or answering questions about how the TB drives/checks the DUT. Does not cover test/main_tb/iso-16845-compliance-tests. Triggers on: feature test, ftest, feature_test_agent, can_agent, memory_bus_agent, reset_agent, clock_agent, timestamp_agent, interrupt_agent, test_probe_agent, test_controller_agent, reference_test_agent, functional_coverage_agent, tb_top, ctu_can_fd_vip, com_channel, check_m.

Architecture map of the CTU CAN FD VHDL RTL in src/ — subsystem responsibilities, data flow, key state machines, and known refactor-in-progress spots. Load this before making non-trivial changes to src/, reviewing a diff under src/, or answering questions about how the core works (protocol_control_fsm, bit stuffing, fault confinement, bit timing/SSP, RX/TX buffers, TXT buffer backup mode, frame filters, register/interrupt infrastructure). Triggers on: can_core, protocol_control, bus_sampling, prescaler, rx_buffer, tx_arbitrator, txt_buffer, frame_filters, memory_registers, interrupt_manager, bit stuffing/destuffing, SSP/secondary sample point, fault confinement, TEC/REC, bus-off, backup buffer / TXBBM.