jagannath-sahoo

/******************************************************************************

                            Online C Compiler.
                Code, Compile, Run and Debug C program online.
Write your code in this editor and press "Run" button to compile and execute it.

*******************************************************************************/

#include <stdio.h>
#include <stdint.h>

jagannath-sahoo

1)
    #include <stdio.h>
    int main()
    {
        int a[4] = {1, 2, 3, 4};
        int b[4] = {1, 2, 3, 4};
        int n = &b[3] - &a[2];
        printf("%d\n", n);
    }
    

jagannath-sahoo

Diagnostics in Braking Systems

EBS(Electronic Braking Systems)
30 ECUs

OBD(On Board Diagnostics)
Check its health

Off Board Diagnostics
A connector tool is connected to the network of ECUs

jagannath-sahoo

/**
 * Function to perform jump to system memory boot from user application
 * Link: http://www.onarm.com/forum/64128/
 * Call function when you want to jump to system memory
 */
void JumpToBootloader(void) {
	void (*SysMemBootJump)(void);
	
	/**
	 * Step: Set system memory address. 

jagannath-sahoo

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/version.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/pci.h>
#include <linux/ioport.h>
#include <asm/unistd.h>
#include <linux/slab.h>
#include <linux/fs.h>

jagannath-sahoo

https://askubuntu.com/questions/645220/unable-to-connect-wifi-ubuntu-14-04-lts-hp-pavilion-network-driver-rtl8723be
sudo add-apt-repository ppa:hanipouspilot/rtlwifi
sudo apt-get update
sudo apt-get install rtlwifi-new-dkms linux-firmware

jagannath-sahoo

read() called when data sent from the device to user space
write() called when data sent from user space to the device
http://derekmolloy.ie/writing-a-linux-kernel-module-part-2-a-character-device/

jagannath-sahoo

************function_graph******************
********************************************
echo 0 > /sys/kernel/debug/tracing/tracing_on
trace-cmd start -p function_graph -g ip_rcv
trace-cmd stop
cat /sys/kernel/debug/tracing/trace

********************************************
cat tracing_on 
echo 1 > tracing_on 

jagannath-sahoo

*****TECH DISCUSSION****
IDEAS for Project

I2C to USB Driver
MODBUS Protocol
Trace Passing System
BACKNET Protocol Building Management system
COAP Protocol
PowerLink Protocol
Zigbee Protocol

jagannath-sahoo

/*
 * Sample kset and ktype implementation
 *
 * Copyright (C) 2004-2007 Greg Kroah-Hartman <[email protected]>
 * Copyright (C) 2007 Novell Inc.
 *
 * Released under the GPL version 2 only.
 *
 */