Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Talking to IO boards inside a computer or microcontroller depends upon the principles used by the microprocessor to address physical devices. On Motorola systems all devices connected to the processor local bus are memory mapped. Therefore it is fairly easier to address by means of a pointer the IO device, since it is just like RAM. In the case of Intel devices, the IO is not memory mapped, it is IO mapped. This causes a minor problem is accessing such devices, since the processor has to use IN, OUT commands and the address, therefore a simple pointer will not do. A non-ANSI function exists on PC's called 'portoutb' and 'portinb' these are used to input and output a byte of data (char) to an IO address (int). The syntax depends upon the compiler used by usually consists of outportb(address,data); data = inportb(address); Care should be taken when porting code from an Intel platform to a Motorola platform since these functions are not standard ANSI and will need to converted for the Motorola Platform. Below is shown an example for a 8255 IO board configured at a base address 0x2b4 #include stdio.h #include dos.h void main() { Date: 26th August 1992 Version 1.0 Function : Reads port A and display it on the screen and portb,c Modifications: Non Standard non portable code PC only */ int CardAddress = 0x2b0, BaseAddress, Port_a; int Port_b, Port_c, ControlRegister; unsigned char ControlWord = 0x90, InputValue; BaseAddress = CardAddress + 4; Port_a = BaseAddress; Port_b = BaseAddress + 1; Port_c = BaseAddress + 2; ControlRegister = BaseAddress + 3; ControlWord = 0x90; outportb(ControlRegister, ControlWord); while (1) { InputValue = inportb(Port_a); outportb(Port_b, InputValue); outportb(Port_c, InputValue); printf("Read from A = %x\n", InputValue); } } Despite these additions NON-ANSI functions they are only DOS commands and hence using Windows NT you will need to write a windows driver, for this you will need C++ and a few books on Windows.
Write a program that counts from 0 to 99 and prints these numbers to the terminal ie it prints 00, 01, 02, 03, 04, 05, ....,99. Graphics 1. Write a program in rPeANUt that
There are 25 employees in a business. Each employee has 5 sales each day of the month (Assume there are 30 days in each month of the year). Draw a flowchart for a pr
source code
Problem Description There is a pebble merchant. He sells the pebbles, that are used for shining the floor. His main duty is to take the length of the room’s sides. But he sometime
The probabilistic Hough transform uses random sampling instead of an accumulator array. In this approach the number of random samples r, is not specified in the OpenCV call, but is
I am an online tutor who can teach computer science and programming language. Is there any requirement for this?
write an algorithm for linear search algorithm
Aim: To implement a program to swap two numbers using reference arguments. Code: void swap(int *a, int *b) { int temp; temp=*a;
I need to program a microprocessor that would have a temperature, gas, humidity and PIR sensor connected to it. It would send the data to a PC via a Zigbee and receive commands fro
The goto statement This statement can be used to branch to another statement of the program. This is rarely used as it violates the principle of structured programming. Though
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd