francisrstokes

 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
+------------------------------------------------------------------------------------------------+
| funct7             | rs2          | rs1          | funct3 | rd           | opcode              | R-type
| imm[11:0]                         | rs1          | funct3 | rd           | opcode              | I-type
| imm[11:5]          | rs2          | rs1          | funct3 | imm[4:0]     | opcode              | S-type
| imm[12|10:5]       | rs2          | rs1          | funct3 | imm[4:1|11]  | opcode              | B-type
| imm[31:12]                                                | rd           | opcode              | U-type
| imm[20|10:1|11|19:12]                                     | rd           | opcode              | J-type
+------------------------------------------------------------------------------------------------+

francisrstokes

#include "machine.h"

void state_machine_step(state_machine_t* descriptor) {
  state_transition_t* transition;
  uint32_t current_state = *descriptor->state_index;

  for (uint32_t i = 0; i < descriptor->num_transitions; i++) {
    transition = &descriptor->transitions[i];
    if ((transition->from_state == current_state) && (transition->condition(current_state))) {
      descriptor->on_state_change(current_state, transition->to_state);

francisrstokes

import re
import sys
import subprocess

callgrind_file = sys.argv[1]
executable_file = sys.argv[2]

if len(sys.argv) < 3:
    print("Usage: fix-callgrind.py <callgrind file> <executable>")
    sys.exit(1)

francisrstokes

# X_k = \sum_{n=0}^{N-1} x_n \cdot e^{-\frac{j 2 \pi k n}{N}}
# X_k = \sum_{n=0}^{N-1} x_n \cdot [\cos(-\frac{2 \pi k n}{N}) + j\sin(-\frac{2 \pi k n}{N})]

import math
import cmath

def generate_data(timespan=64):
    data = []
    for i in range(timespan):
        ni = i/timespan

francisrstokes

import math
import numpy as np
import matplotlib.pyplot as plt

# Generate a lowpass filter using a windowed sinc function
def sinc(x):
    if x == 0:
        return 1
    return math.sin(math.pi * x) / (math.pi * x)

francisrstokes

from socket import socket, AF_PACKET, SOCK_RAW

ETH_P_ALL = 0x0003

print("Starting")

interface = "enx7cc2c65485c0"
# interface_mac = 7c:c2:c6:54:85:c0

# Note: When sending ethernet frames, only the following data is actually supplied at this level:

francisrstokes

import pandas as pd
import sys
from enum import Enum

""" protocol-decoder.py <saleae csv file>

Takes in an exported csv file from the Saleae logic2 software, where the SPI analyzer was used to trace communication with an enc28j60 ethernet
chip from Microchip, and produces the instructions and responses the communication represents.

- Software resets

francisrstokes

# Allow mouse interaction
set -g mouse on

# Don't rename windows automatically
set-option -g allow-rename off

# Use C-a instead of C-b
unbind C-b
set-option -g prefix C-a
bind-key C-a send-prefix

francisrstokes

#!/bin/bash

# Default value for days
DAYS=7

# Check if a custom number of days is provided as an argument
if [ "$1" ]; then
  DAYS=$1
fi

francisrstokes

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