kbeckmann

Notes about clocks in Caravel

2021-05-09 by kbeckmann

These are my notes of how I interpret how the clock tree works in Caravel. It might be inaccurate.

High level module hierarchy

caravel:

kbeckmann

Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x0000561db819718a in std::vector<Yosys::hashlib::dict<Yosys::RTLIL::IdString, Yosys::RTLIL::Const, Yosys::hashlib::hash_ops<Yosys::RTLIL::IdString> >::entry_t, std::allocator<Yosys::hashlib::dict<Yosys::RTLIL::IdString, Yosys::RTLIL::Const, Yosys::hashlib::hash_ops<Yosys::RTLIL::IdString> >::entry_t> >::size (this=<optimized out>)
    at /usr/include/c++/10.2.0/bits/stl_vector.h:919
919	      { return size_type(this->_M_impl._M_finish - this->_M_impl._M_start); }
(gdb) bt
#0  0x0000561db819718a in std::vector<Yosys::hashlib::dict<Yosys::RTLIL::IdString, Yosys::RTLIL::Const, Yosys::hashlib::hash_ops<Yosys::RTLIL::IdString> >::entry_t, std::allocator<Yosys::hashlib::dict<Yosys::RTLIL::IdString, Yosys::RTLIL::Const, Yosys::hashlib::hash_ops<Yosys::RTLIL::IdString> >::entry_t> >::size (this=<optimized out>)
    at /usr/include/c++/10.2.0/bits/stl_vector.h:919
#1  Yosys::hashlib::dict<Yosys::RTLIL::IdString, Yosys::RTLIL::Const, Yosys::hashlib::hash_

kbeckmann

from nmigen import *
from nmigen._toolchain.yosys import *
from nmigen.back.cxxrtl import rtlil

import os, subprocess

def _convert_rtlil_text(rtlil_text, black_boxes, verilog_boxes, *, src_loc_at=0):
    if black_boxes is not None:
        if not isinstance(black_boxes, dict):
            raise TypeError("CXXRTL black boxes must be a dictionary, not {!r}"

kbeckmann

from nmigen import *
from enum import IntEnum

from nmigen.utils import bits_for

class AccessFlags(IntEnum):
    R  = 1 << 0
    W  = 1 << 1
    RW = R | W

kbeckmann

from nmigen import *
from nmigen.build import *

from nmigen_boards.tang_nano import TangNanoPlatform

class Blinky(Elaboratable):
    def elaborate(self, platform):
        m = Module()

        platform.add_resources([

kbeckmann

from nmigen import *
from nmigen.build import *

import itertools

from nmigen_boards.tang_nano import TangNanoPlatform

class Blinky(Elaboratable):
    def elaborate(self, platform):
        m = Module()

kbeckmann

import time
import psutil
import multiprocessing as mp
from multiprocessing import Process

def f(thread, duty, freq, q):
    p = psutil.Process()
    p.cpu_affinity([thread])

    while True:

kbeckmann

[NetDev]
Name=bond1
Kind=bond

[Bond]
Mode=802.3ad
MIIMonitorSec=1s
LACPTransmitRate=fast
UpDelaySec=2s
DownDelaySec=8s

kbeckmann

import sys
import struct
import binascii

# See https://github.com/f4exb/sdrangel/tree/master/plugins/samplesource/filesource

data = open(sys.argv[1], "rb").read()
out = open(sys.argv[2], "wb")

w = bytearray()

kbeckmann

/*
$ AFL_USE_ASAN=1 afl-clang-fast fuzzer.c -o fuzzer
$ afl-launch -i in_dir -o out_dir -m none -n $(nproc --all) -- ./fuzzer @@
$ afl-whatsup -s out_dir
*/

#include <stdio.h>
#include <stdlib.h>

#define BUF_SIZE 1024*1024