This document discusses interfacing devices like LEDs, LCDs, and keyboards to an 8051 microcontroller. It begins by explaining what input/output interfacing is and the differences that exist between CPUs and peripheral devices. It then reviews the pin configuration of the 8051 and the specific devices that will be interfaced: LEDs, an LCD, and a keyboard. Wiring diagrams and code examples are provided for interfacing each device. Key concepts like scanning keyboard rows and columns, sending commands and data to an LCD, and checking an LCD's busy flag are explained.
this ppt only for beginner who want to understand concept of Timer counter operation of LPC2148 step by step.
hope it may help u.
always welcoming ur suggestion.
Interrupt programming with 8051 microcontrollerAnkit Bhatnagar
this ppt is related to the intrupts related to the 8051 microcontroller ..
topics are introduction to intrupts
intrerrupts vs pollings
difference between intrupts snd pollings
This presentation discusses the support for interrupts in 8051. The interrupt types, interrupts versus polling etc are discussed. The register formats of IE, IP register are discussed. The concept of priority among the interrupts is discussed.
this ppt only for beginner who want to understand concept of Timer counter operation of LPC2148 step by step.
hope it may help u.
always welcoming ur suggestion.
Interrupt programming with 8051 microcontrollerAnkit Bhatnagar
this ppt is related to the intrupts related to the 8051 microcontroller ..
topics are introduction to intrupts
intrerrupts vs pollings
difference between intrupts snd pollings
This presentation discusses the support for interrupts in 8051. The interrupt types, interrupts versus polling etc are discussed. The register formats of IE, IP register are discussed. The concept of priority among the interrupts is discussed.
This PPT covers some important points of 8051 microcontroller like Applications, block diagram, Architecture, comparison between microprocessor and microcontroller, Pin diagram, RAM memory space allocation, register banks, Instruction set, Addresing modes, serial communication, baud rate, machine cycle, serial interface with PC, Introduction to Timers/Counters etc....
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
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Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
2. TOPICS OF
DISCUSSION:-
What is IO interfacing?
Recapitulation of PIN Configuration of 8051
Devices to be interfaced
How they are interfaced?
Queries…
11/27/2015
3. WHAT IS IO INTERFACING
Input-output interface provides a method for transferring information between
internal storage and external I/O devices.
Peripherals connected to a microcontroller need special communication links
for interfacing them with the CPU. The purpose of the communication link is to
resolve the differences that exist between the CPU and each peripheral.
The major differences are:
Peripherals are electromechanical and electromagnetic devices and their
manner of operation is different from the operation of the CPU and memory,
which are electronic devices. Therefore, a conversion of signal values may be
required.
The data transfer rate of peripherals is usually slower than the transfer rate of
the CPU, and consequently, a synchronization mechanism may be needed,
etc…..
11/27/2015
4. PIN CONFIGURATION OF 8051
11/27/2015
Each
port0,port1,port2,
port3 are bidirectional
and 8-bit I/O ports.
Above data for ATMEL
AT89S51
5. DEVICES WE WILL BE
INTERFACING:-
LEDS
LCD
KEYBOARD
11/27/2015
6. INTERFACING LEDS
• Connection -Port 0 is connected to eight LEDs,
each of them is connected to 5V through a 330
ohm resistor. Port 1 is connected to a DIP switch
and a 10Kohm resistor
• Condition - Corresponding led should light up
when switch is pressed , i.e. if Switch at P1.0 is
pressed then LED at P0.0 should light up.
11/27/2015
9. HOW TO PROGRAM ?? ..
ASSEMBLY LANGUAGE
LOOP:
mov p1,#0ffh ; To
configure
port1 for input.
mov a,p1
mov p0,a
sjmp LOOP ; Stay in infinite
loop
C LANGUAGE
void main()
unsigned char S;
P1= 0xff; //port1 as input
P0= 0x00; //port0 as output
{
while (1)
{
S=P1; //switch value
P0=P1; //display on led
}
}
11/27/2015
10. INTERFACING LCD
• LCD is finding widespread use replacing LED
• The declining prices of LCD
• Ability to display numbers, characters and graphics
• Incorporation of a refreshing controller(graphics
controller, e.g. HD44780) within the LCD, there by
relieving the CPU of an additional task.
• LCD is far better than 7 segment display as it has far
better graphics.
• Ease of programming for characters and graphics
11/27/2015
13. LCD CONNECTIONS
To send a command :-
Specify command to
data pins.
Make R/W=0 (write
operation)
Make RS=0 (select
command register)
Give a H-to-L pulse to
E(enable pin).
To send data:-
Write data to data pins
R/W =0 (write operation)
Make RS=1 (select data
register)
Give a H-to-L pulse to
E(enable pin).Data is written
on positive edge of enable
signal.
11/27/2015
14. ANOTHER ASPECT TO BE TAKEN
CARE OF…. BUSY FLAG(D7-PIN)
• Some delay is needed for LCD to successfully process the
command or data(processing time of lcd).
• So, before data to be written, check if lcd is busy(check the D7-
pin status(if 1 then busy)
• Reading the Busy flag.
• Select command register (RS=0)
• Select read operation (R/W=1)
• Send enable signal (E=1)
• Read the flag
11/27/2015
15. KEYBOARD
INTERFACING
• Keypad(keyboard) is a widely used input device with lots of
application in our everyday life.
• From a simple telephone to keyboard of a computer, ATM,
electronic lock, elevator, etc., keypad is used to take input
from the user for further processing.
• Keypad is organized as a matrix of switches in rows and
column.
11/27/2015
16. SO HOW DOES KEYPADS
WORK??..
11/27/2015
It’s a matrix of rows and
columns(here 4*4)
Rows and columns intersect at
16 points.(when pressed)
One of them are connected to
power supply and other one
grounded…
17. CONNECTIONS TO
PORTS
11/27/2015
Initially all the rows are set to
zero by the controller and the
columns are scanned to check
if any key is pressed. In case
no key is pressed the output of
all the columns will be high.
Whenever a key is pressed the
row and column corresponding
to the key will get short, resulting
in the output of the
corresponding column goes to
low (since we have made all the
rows zero). This gives the
column number of the pressed
key.
Once the column number is detected,
the controller set’s all the rows to
high. Now one by one each row is set
to zero by controller and the earlier
detected column is checked if it
becomes zero. The row
corresponding to which the column
gets zero is the row number of the
digit.