root42

#!/usr/bin/env python
# Plays "silent night" on a piezo buzzer attached to pin 18 of the Onion Omega2
# Things required: python lite, pwm needs to be enabled via:
# omega2-ctrl gpiomux set pwm0 pwm

from time import sleep

exportStr="/sys/class/pwm/pwmchip0/export"
periodStr="/sys/class/pwm/pwmchip0/pwm%s/period"
dutyStr="/sys/class/pwm/pwmchip0/pwm%s/duty_cycle"

root42

// compile and run using (requires root access):
// gcc -W -Wall buzzer.c -o buzzer -lpigpio -lpthread && sudo ./buzzer

#include <pigpio.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>

// GPIO19 is PWM1

root42

#include <stdio.h>
#include <stdlib.h>
#include <alloc.h>
#include <conio.h>
#include <dos.h>
#include <mem.h>

#define VIDEO_INT 0x10
#define SET_MODE  0x00
#define VGA_256_COLOR_MODE 0x13

root42

#!/usr/bin/env python
import time
import math
import colorsys
from neopixel import *

# LED strip configuration:
LED_COUNT = 128      # Number of LED pixels.
LED_PIN = 18      # GPIO pin connected to the pixels (must support PWM!).
LED_FREQ_HZ = 800000  # LED signal frequency in hertz (usually 800khz)

root42

Coredump contains stack information as well. If you can use this stack information along with the EBP and EIP register values in the coredump file, you can print the stack trace. I had written a program to do this. You can find the program in the following link.

https://gist.github.com/root42/c979b037f85dc4b2be1f3735afedeb1d

Usage: Compile the above program and give the corefile when you execute it.

   $corestrace core

If you want symbols also to be printed, you do like this: Let's assume the program that generated the core is 'test'.