novoru

# Fractional Delay Filter using the Farrow Structure
# https://wirelesspi.com/fractional-delay-filters-using-the-farrow-structure/

import numpy as np
import matplotlib.pyplot as plt

if __name__ == "__main__":
    # Fixed Coefficients of the Farrow structure for a cubic interpolator
    b3 = np.array([-1/6, 1/2,-1/2, 1/6])
    b2 = np.array([ 1/2,-1,   1/2, 0])

novoru

import adi
import numpy as np
from datetime import datetime

# ADALM-PLUTO parameter
sample_rate = 12e6          # 12MHz
bandwidth = 4.2e6           # 4.2MHz
center_freq = 1572.42e6     # 1572.42MHz (GPS L1/CA)
duration = 100e-3           # 100ms
num_samps = duration*sample_rate

novoru

# Conway's Game of Life 

import curses
import time
import signal
import sys

from typing import List

Vector = List[str]

novoru

// Reverse polish calculator

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

int main(int argc, char **argv) {

  if(argc == 1)
    exit(0);

novoru

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <readline/readline.h>
#include <unistd.h>
#include <stdbool.h>
#include <sys/wait.h>
#include <signal.h>

typedef struct Vector {

novoru

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>

#define BUF_SIZE 256

int main(int argc, char **argv) {
  pid_t pid;

novoru

rotChar :: Int -> Char -> Char
rotChar n c
  | c `elem` ['A'..'Z'] = chr(mod ((ord(c) - ord('A')) + n) 26 + ord('A'))
  | c `elem` ['a'..'z'] = chr(mod ((ord(c) - ord('a')) + n) 26 + ord('a'))
  | otherwise = c

rot :: Int -> String -> String
rot n s = map (rotChar n) s

main = do

novoru

// extend n bit of x to the left.
// Reference: ハッカーのたのしみ(ISBM978-4-434-04668-1) p.18-19
int32_t sign_extend(uint8_t x, uint8_t n)
{
	return (int32_t) ((x + (1 << n)) & ((1 << n) | ((1 << n) - 1))) - (1 << n);
}

novoru

// リンカ・ローダ実践開発テクニック p.88: pointer.c

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

char s1[] = "This is array.";
char *s2  = "This is pointer.";

int main() {
    printf(" s1 = 0x%08lx\n", (unsigned long) s1);

novoru

// リンカ・ローダ実践開発テクニック p.78-80: ardump.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <elf.h>
#include <ar.h>
#include <sys/stat.h>