simryang

/dts-v1/;
/plugin/;

/ {
    compatible = "brcm,bcm2835";
    fragment@0 {
        target = <&spi0>;
        __overlay__ {
            #address-cells = <1>;
            #size-cells = <0>;

simryang

from pathlib import Path

def is_jpg():
  img = Path("output-2023-12-15/30661_10000000c840e868_2023-12-15_16-01-46.wav").read_bytes()
  print("jpg" if img[0] == 0xff and img[1] == 0xd8 and img[2] == 0xff else "no jpg")
  return True if img[0] == 0xff and img[1] == 0xd8 and img[2] == 0xff else False

simryang

import yaml
from pathlib import Path


def get_rpi_type() -> str:
  rev = int(yaml.safe_load(Path("/proc/cpuinfo").read_text().replace("\t", "")).get("Revision"), base=16)
  rpi_type = (rev & 0x00000FF0)>>4 if rev & 0x800000 else [0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 3, 6, 2, 3, 6, 2][rev & 0x1f]
  rpi_model = {0: 'A', 1: 'B', 2: 'A+', 3: 'B+', 4: '2B', 6: 'CM1', 8: '3B', 9: 'Zero', 0xa: 'CM3', 0xc: 'ZeroW', 0xd: '3B+', 0xe: '3A+', 0x10: 'CM3+', 0x11: '4B', 0x12: 'Zero2W', 0x13: '400', 0x14: 'CM4', 0x15: 'CM4S', 0x17: '5',}
  return rpi_model.get(rpi_type, "")

simryang

from pathlib import Path
import smbus

bus_number = 10


def have_csicamera() -> bool:
  # csi 카메라는 i2c 를 사용하므로 연결되어 있다면 /dev/i2c-10 이 존재
  return Path(f"/dev/i2c-{bus_number}").exists()

simryang

# source: http://st-on-it.blogspot.com/2010/01/how-to-move-folders-between-git.html
# First of all you need to have a clean clone of the source repository so we didn't screw the things up.

git clone git://server.com/my-repo1.git

# After that you need to do some preparations on the source repository, nuking all the entries except the folder you need to move. Use the following command

git filter-branch --subdirectory-filter your_dir -- -- all

# This will nuke all the other entries and their history, creating a clean git repository that contains only data and history from the directory you need. If you need to move several folders, you have to collect them in a single directory using the git mv command.

simryang

import time
import asyncssh
import asyncio

params = range(10)

async def run():
  async with asyncssh.connect("localhost", 8090, username="tester", password="t35t3r", known_hosts=None) as conn:
    for param in params:
      await conn.create_process(f"nohup very_very_long_run.sh {param} &")

simryang

ssh pi@pi_ip_address "sudo sed -i 's/"\""au/au/' /etc/vim/vimrc"

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python3 -c 'from pathlib import Path; import yaml; print(yaml.safe_load(Path("/proc/cpuinfo").read_text().replace("\t", " ")).get("Serial"))'

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echo $(curl -s 'https://ident.me')

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