Communication series P2 : AMBA APB in Verilog

Explore revisions to APB revision B, add wait states in master and slave for internal processing, modify write/read operations, and examine error reporting mechanisms in EP3.

Learn to implement APB master and slave in Verilog that handle wait states by modeling P select, P enable, and P ready signals with delayed transfer completion.

Implement a verilog amba apb master with wait states, featuring setup and enable transitions, monitoring p ready to complete or continue app transfers, and returning to idle as needed.

Implement a slave with wait states in APB transfers by adding an s wait input and updating the finite state machine to delay or complete reads and writes.

connects master and slave in an AMBA APB setup with a delay signal to pause transfers; builds a top module and testbench to verify write and read transactions.

Learn how to implement the SLVERR flag in an AMBA APB slave with Verilog. Explore error scenarios, last cycle signaling, and peripheral-specific read and write behavior.

the lecture introduces four slverr conditions for an amba apb slave in verilog, including address range error, address value error, data value error, and apb cycle error.

Implement slverr logic in an apb slave for a 16-depth memory, with address range, address value, and data value error checks, and assert slverr on the second apb cycle.

Set up a verilog test bench to verify ABP slave behavior, run five valid write/read transactions, then trigger SLVERR with invalid address range and values during the second ABP transfer.

Learn to connect two slaves to a single amba apb master in verilog, using psel-based slave selection and muxed pr data with ready and error signals.

Designs a Verilog amba apb slave with an fsm-based reset and next-state/output decoder, handling write and read transfers, memory updates, and slv error detection.

this lecture presents a verilog-based amba apb master design with two independent slave selects, an address decoding block, and paddr, pwrite, and prdata paths for two slaves.

Connect master and two slaves in an AMBA APB Verilog design using a top module, signal wiring, and a mux to select PR data and slave error.

Verify amba apb system operation in verilog by simulating a test bench that performs writes to two slaves and reads back data, validating pready, prdata, and memory updates.

Begin building an app-based peripheral suite from scratch, including gpio, register, fifo, and uart cores. Explore the APB wake up signal to coordinate master-slave readiness.

Design a simple APB register core with a single 32-bit register at address zero, handling write and read transactions and signaling ready on completion using a finite state machine.

Explore Verilog implementation of an APB register P2, wiring a 32-bit gpio register at address zero, and perform write and read operations through a simple state machine.

Build a verilog testbench that connects reg inputs and wire outputs to the dut, generates clock and reset, and executes valid apb write and read transactions.

Demonstrates APB write and read transactions in Verilog, showing how to remove reset, assert p enable and p ready in the same clock, and update GPIO with 219.

Implement an APB fifo core with an app interface, handling writes with wdata and address and reads via prdata, using pselect, penable, pwrite, with two-cycle latency and ready signaling.

Designs a verilog apb fifo with 16 32-bit locations, write and read pointers, and a counter to track full and empty. Employs an fsm driven write path with two-clock cycles.

Validate p enable and p select to initiate an apb fifo read, wait two cycles for read latency, fetch data from memory, assert prdata and pready, and update read pointer.

Demonstrates an apb fifo test bench that generates a clock, applies reset, and performs 15 random write transactions followed by 15 read transactions to verify memory updates.

Analyze how an APB interface connects to a GPIO IP via a bridge translating high-speed transactions to a lower-speed protocol, and how mode, direction, write, and read registers configure pins.

Learn how GPIO buffers enable or sample inputs using an output enable control, and compare push-pull and open-drain configurations.

Explore open drain and push-pull configurations, show how nMOS and pull-up resistors create proper logic levels, and implement this behavior in Verilog.

Learn Verilog gpio implementations for push-pull and open-drain outputs, enabling the transmitter and using the direction and read/write registers to drive or sample the pin.

Implement apb gpio module with four eight-bit registers (direction, mode, write, read) and two-bit address, handling apb write and read transactions, sampling inputs, and offering push-pull or open-drain configurations.

Implement an APB GPIO IP with push-pull and open-drain output modes, controlled by a direction register and output enable, sampling outside world and supporting APB write/read transactions with no-wait transfers.

Verifies the apb gpio ip via a testbench that uses rac inputs and wires, clocks, resets, and writes, reads, and mode settings for push-pull and open-drain configurations.

Learn wake up signaling in amba apb verilog: a one-bit slave-to-master signal, optional to indicate data readiness, enabling low-power data transfers by coordinating with p select and p ready.

Design a Verilog UART core that uses a wake-up signal to coordinate write and read transactions with a master, including start bit, eight-bit data, and tx/rx lines.

Build a uart core with an apb interface, implementing a sleep to wakeup FSM that manages rx/tx, p wakeup, p select, and p ready during a master write transaction.

Explore building a UART core with APB integration, detailing start bit detection, shift-register data collection, and end-to-end transmission and reception for a slow peripheral.

Build and verify a UART core using a test bench, generate clock and reset, and perform ABP write and read transactions with random data to validate transmission and reception.

Explore the evolution of the APB peripheral from APB one to APB five, including the wait state error reporting mechanism and protection unit, plus EB revisions and user signaling assignments.

Trace the history of APB revisions from the first release to APB five, detailing configurable address and data widths, error reporting, wait states, protection signals, write strobe, and burst support.

Explore how APB3 wait states let a slave hold a write transaction until pready asserts, using psel, penable, address, and data signals.

explore the apb3 error reporting mechanism, enabling slaves to signal protocol errors to the master when address or data violate constraints, using slv_error signals and pselect/penable timing.

Explore apb4 secure and normal access using a 3-bit protection register that encodes privilege, secure vs non-secure, and data vs instruction, with 001 and 010 codes for these transactions.