# basic_verilog ### Some basic must-have verilog modules (licensed under CC BY-SA 4_0) Author: Konstantin Pavlov, pavlovconst@gmail.com ### CONTENTS: * **/Advanced Synthesis Cookbook/** - useful code from Altera's cookbook * **/KCPSM6_Release9_30Sept14/** - Xilinx's Picoblaze soft processor * **/pacoblaze-2.2/** - version of Picoblaze adapted for Altera devices * **/scripts/** - useful TCL scripts * **/scripts/allow_undefined_ports.tcl** - allows generation of test projects with undefined pins for Vivado IDE * **/scripts/compile_quartus.tcl** - boilerplate script for commandline project compilation in Quartus IDE * **/scripts/convert_sof_to_jam.bat** - Altera/Intel FPGA configuration file converter * **/scripts/convert_sof_to_rbf.bat** - another Altera/Intel FPGA configuration file converter * **/scripts/iverilog_compile.tcl** - complete script to compile Verilog sources with iverilog tool and run simulation in gtkwave tool * **/scripts/modelsim_compile.tcl** - Modelsim no-project-mode compilation script * **/scripts/post_flow_quartus.tcl** - custom reporting or report analisys for Intel Quartus IDE * **/scripts/post_flow_vivado.tcl** - custom reporting or report analisys for Xilinx Vivado IDE * **/scripts/program_all.bat** - command line programmer example for Altera/Intel FPGAs * **/scripts/project_version_auto_increment.tcl** - project version autoincrement script for Quartus IDE * **/scripts/quartus_system_console_init.tcl** - initialization script for reading/writing Avalon-MM through JTAG-to-Avalon-MM bridge IP * **/scripts/set_project_directory.tcl** - changes current directory to match project directory in Vivado IDE * **/scripts/write_avalon_mm_from_file.tcl** - writing bulk binary data from binary file to Avalon-MM through JTAG-to-Avalon-MM bridge IP * **main_tb.sv** - basic testbench template * **ActionBurst** - multichannel one-shot triggering module * **ActionBurst2** - multichannel one-shot triggering with variable steps * **adder_tree** - adding multiple values together in parallel * **bin2gray** - combinational Gray code to binary converter * **bin2pos** - converts binary coded value to positional (one-hot) code * **clk_divider** - wide reference clock divider * **debounce** - two-cycle debounce for input buttons * **delay** - VERY USEFUL MODULE to make static delays or to synchronize across clock domains * **dynamic_delay** - dynamic delay for arbitrary input signal * **edge_detect** - combinational edge detector, gives one-tick pulses on every signal edge * **encoder** - digital encoder input logic module * **fifo** - single-clock FIFO buffer (queue) implementation * **gray2bin** - combinational binary to Gray code converter * **leave_one_hot** - combinational module that leaves only lowest hot bit * **lifo** - single-clock LIFO buffer (stack) implementation * **NDivide** - primitive integer divider * **pos2bin** - converts positional (one-hot) value to binary representation * **pos2bin** - converts positional (one-hot) value to binary representation * **prbs_gen_chk** - PRBS pattern generator or checker * **pulse_gen** - generates pulses with given width and delay * **pulse_stretch** - configurable pulse stretcher/extender module * **reset_set** - SR trigger variant w/o metastable state, set dominates here * **reverse_bytes** - reverses bytes order within multi-byte array * **reverse_vector** - reverses signal order within multi-bit bus * **set_reset** - SR trigger variant w/o metastable state, reset dominates here * **spi_master** - universal spi master module * **UartRx** - straightforward yet simple UART receiver implementation for FPGA written in Verilog * **UartTx** - straightforward yet simple UART transmitter implementation for FPGA written in Verilog * **UartRxExtreme** - extreme minimal UART receiver implementation for FPGA written in Verilog * **UartTxExtreme** - extreme minimal UART transmitter implementation for FPGA written in Verilog Also added testbenches for selected modules