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74 Threads found on 4x4 Matrix
Hello to all, I am Working on dsPIC30F4011 microcontroller in MPLab in C programming. I need to use 4x4 matrix keypad. Please can any one suggest how can i interface that keypad with dsPIC30F4011 uController? and also kindly give programming instructions that need to be written in C code, like internal pull-up and all that. kindly pr
hello, I've been trying to interface 4x4 hex keypad with pic16f877a using MPLAB X and XC8 compiler. My task is to get 4 individual key presses from matrix keypad and convert it into a 4 digit integer and display the 4 digit integer on multiplexed common cathode seven segment display having 4 seven segment devices. I am able to capture the k
Hello! Everyone, I want to simulate/emulate matrix Keypad (4x4) using micro-controller. One of our project has 4x4 matrix Keypad and there are lots of test cases for the Project Testing, in which we have to select process and enter values using keypad. I want to automate this whole process with the help of PC. A PC (...)
hello! i'm trying to design a nutler matrix at 10GHz using this architecture 130547 i've designed the 3dB coupler and the crossover, here are the results of the simulations: for the coupler: (port 4 is the isolated port) 130548 for the crossover: 130549 my proble
Assuming a 4x4 keypad, perhaps just adding 1 up to 4 diodes ( katodes tied together ) in parallel with the matrix polarized in the opposite direction of which is intended to scan the nibble, this way you could check at large intervals for existing connection. Indeed, this is suited to work only with routines that scan only one key pressed at a time
The peripheral circuit doesn't look different from a microcontroller electronic lock. FPGA IO-pins can do everything that a microcontroller GPIO does (and more, but that's not relevant for the present problem). Consider how a 4x4 keyboard matrix can be read? Typically you have 4 inputs with pull-up resistors and 4 open drain outputs.
Pl. any body help me to write c (or) asm code for 8051 to scan the 4x4 matrix key pad & displaed it 7seg display -i'm using 3 digit (000-999) , first digit is to be displayed start from left digit, 2nd digit in middle, last digit right .
This array would be able to hold a 4x4 matrix of bytes Didn't you mean 8X4 ?
With advance thank to whosoever replay to this mail, Kindly guide me idea using 8051 , to scan 4x4 matrix key pad and display on P1,P2,P3 and send it to other 8051 by RS232.
Hi friends, I am working in Embedded domain. I used to develop projects using Embedded C in ARM. I have some doubt in ARM Assembly Program. The questions are below: 1) Calculate area of a Circle 2) To reverse the word order in a block of memory.The block contains 25 words of data. 3) To multiply two matrix of size 4x4. Pleas
I just try to write a program which detect the 4x4 keypad and decode. I try to learn xilinx application, but I still confuse how to write this program.
Hy there. I'm new in this microcontroller programming and i have some problems.I need to scan an 4x4 matrix switches.I have 16 dip switches that i need to inferface with my microcontroller rl78-d1a.I got 8 I/O ports.I don't now how to connect my dip-switches to the I/O ports.Can you guys please help me? Thx in advance
Hi there First of all, I am an Electrical Engineering student busy with a design project. Scenario: Build a wireless communication device for the verbally disabled by using a 4x4 matrix keypad to interact with a 2x16 LCD display via Bluetooth OR RF. MY problem here is not with the programming since I have written most of the coding and it
PIC30F5011/MPLAB 8.8v Interfaces _ 24LC256, 20x4 LCD, DS1307, 4x4 matrix keypad, external osc 8 Mhz. Hi, I made a code accessing these interfaces, and this whole thing works absolutely fine when I am using without hyperterminal. But some times when I connect to hyperterminal the micro-controller starts to reset and it never stops, som
The algorithm above is not the usual one commonly used to scan matrix keyboards. Take a look on options bellow: +++
Hi I am doing a project writing a program to use a 4x4 matrix keypad, interacting wirelessly with a 8051 microcontroller, displaying on a 2x16 LCD screen. Now I am a programmer, and the program I am using for the keypad to LCD is working fine, however, I have no knowledge concering wireless communication and how to set i
Hello there I am busy with a project where I must use a 4x4 matrix keypad to display 40 characters i.e (A-Z,0-9,comma,decimal point, exclamation mark and question mark) using alpha numerical display(same way the old non-touch screen cell phones worked). I am using a 16F877A PIC and programming in MikroC compiler for PICS. Now program
Look at this tutorial and 4x4 matrix keypad interfacing and try to make program for only 4 keys as per your requirement.
Please help me write a code in VHDL for a 4x4 matrix which can then be used to build a 16x16 matrix.
I have my code and already implemented on hardware that scan 4x4 matrix keypad and display a number in seven segment display, now I wan't to connect a DC motor so that number 1 is pressed on keyboard motor should rotate clockwise and when 2 is pressed motor rotate ant clockwise., the code for keypad and proteus simulation are down here, kindly
Hi all 1- i want to design butler matrix with microstrip antenna array using ADS2011 can any body advise me how to make it by ADS i want connect different shapes of antenna with butler matrix and see the behavior of S11 and gain i want design 4x4 and 8x8 2- how i can plot gain VS frequency using ADS
Hey there, i'm using atmega64l board with 4x4 keypad. i'm also using assembly language to write the code. i know how to interface and display the inputs from the keypad to the lcd, but i'm struggling to understand how to do addition operation between those inputs and display the result on lcd. so, if someone knows how to do it. please help m
could any one explain how 4x4 keypad works
Hi, I want to interface PCF8574 I2C GPIO Expander with 89C52 micro controller. My application is to interface 20x4 Character LCD and 4x4 matrix Keypad with the 89C52 micro controller using I2C. Before connecting LCD and KEYPAD, i am just trying to toggle LED. I have connected the PCF8574 to the 89C52 with two GPIO's and LED is connected
hai Can any one help me how to write program for interface 4x4 keypad to P18F45K20 controller as soon as possible. Is there LCD in your project. Are you using mikroC Compiler. If yes, there is a keypad library in it.
HI am doing sum of absolute difference for motion estimation in vhdl ... am dng full search algorithm .. i got problem in image processing as i have to move a block of image on refernce image .. how to read reference image as a matrix
HI, Any one have 4x3 and 4x4 matrix keypad scanning code collection for 8051 using keil. Following code is written for AVR can any one convert it for 8051. And can any one explain what is going on in the code, am newbie. Kindly do the needful. In my board. //Rows sbit Row_A P0^0; sbit Row_B P0^1; sbit Row_C P0^2; sbit Row_D P0^3;
Hi all; Can anyone give a simple vhdl code for make partitioning for 2x2 matrix from 4x4 matrix? I try to search for simple example as reference but I can't find it. Really need helps..thank you
Santosh, Due to 8x8 Keyboard to be not an usual configuration, I can sugest you take some example code project with 4x4 + LCD and extend it. +++
Help me to interface 4x4 kepad with arm processor(lpc2129). i am using ARM LPC2129 processor. i could not interface the 4x4 matrix. please any one help me to interface kepad with ARM processor.
hi can anyone please help me with the tested code for 4x4 matrix keyboard? i have it with if statement. it would be better if i can use for statement so i can compress the code.. thanks and regards akshay gadaria
Hello! Are you waiting that someone makes the source code for you? What about reading the application note, understanding it and implementing it yourself? You will notice that by adding a column of buttons (for instance on P1.3 if we are reading the same app note), you will get a 4x4 pad. And you may also notice that with all the ports remaining y
Hello everyone.... I have bought a 4x4 matrix keypad and wish to implement it in my project involving AVR ATmega128. I have successfully tested it and am able to detect SINGLE key-presses. Next I wanted to implement mobile-phone type keypad using my 4x4 keypad where suppose i press a key one then "1" is displayed but if i press the (...)
hello.. I want to design a 4x4 butler matrix. As we know, butler matrix is consisted of hybrid, phase shifter, and crossover (CMIIW). So i must design each of them properly to make a butler matrix. I am designing hybrid coupler 90 degree in ansoft hfss now. I am newbie in ansoft i can't read well the results. Work (...)
8x4 keypad will require atleast 12 i/o lines of the controller. Considering the fact that atmega series have 8 bit micro controllers and correspondingly the i/o ports are 8 bit wide. Hence the program will be some what lengthy but not complicated. Refer to the mazidi book of AVR micro controllers. It has got an example of interfacing 4x4 matrix key
This is test bench for 4x4 multiplier why book is using for loop for i and j plz explain module testbench; reg A, B; //using reg data type for all inputs wire rslt; //using wire data type for outputs from instantiated module mult mult_inst (A, B, rslt); // Instantiating the module under test initial begin : init
can anyone recommeded a design configuration for 3x3 matrix hybrid coupler. I know how to design 4x4, but 3x3 seem to be more complicated
Hi, I am trying to simulate LMS adaptive filtering in matlab but am having some problems forming the equalisation matrix which needs to be of dimension nTx by nRx (4x4 in this case) My error signal is a 4x1 matrix which is the result of x(:,i)- W' *y(:,i) where x(:,i) is a 4x1 matrix comprising 4 training symbols and (...)
Hi friends, I am trying to interface a keyboard and LCD with ATmega128. I have manage to get lcd going but keyboard seems to be creating some is not printing 1,5,9,13 which are on first row and first column. Please try to find this strange behavior code and ckt is attached with. Please help me! I have tried every possible thi
Hi: I am trying to build a 4x4 analog switch matrix to simulate full-duplex transmission going through 10G Ethernet, so that this switch matrix is just acting like CAT6e cable for 10Gbase-T Ethernet signal. The analog switch matrix is composed of several NMOS transmission gates and I have drew the layout for this to (...)
Hi frnds... I would like to introduce my PIC18F4550 dev. board . In this, PicKit2 is used for programming(ICSP) and a 4x4 +1 matrix keyboard and 20x4 LCD is used.
hi! i need some help here. but i am new to C programming so i am stuck. i have a 4x4 matrix keypad which need to interface with the LCD. the LCD has 16 characters x 2 rows. my microcontroller is 18f452. i am using mplab to do the C programming. the LCD screen will first show command in both rows for user to input the data from the keypad. f
goto code library and you will get 4x4 key scan code. Understand and extend to 5X5 keys. Good luck V.Durgai dass Added after 1 minutes: goto code library and you will get 4x4 key scan code. Understand and extend to 5X5 keys. Good luck V.Durgai dass
Hi, I'm always confused with the keys. This time the confusion is on the peaks. I'm interfacing a 4x4 keypad with uC. I have made the code which displays the key number that has been pressed & is working absolutely fine. In this code i'm waiting continously for a key to be pressed . I have to implement this in my project where this keypad
hi all, i need to implement the following 1. Use CC2341 as the target 2. Connect it to a 4x4 alphanumeric matrix Keypad 3. Interface it by JHD162A for LCD Display Can anyone please give me the hardware block level design to connect LCD and Keypad with Core. thanx in advance...
Thank you, I've read it. Unfortunately, the way I read it is that a 4x4 matrix needs 17 pins. By my calculations, an 8x16 would need at least 33. Is that correct? I've never worked with a led matrix before so be kind, lol.
Hi, I have a 4x4 matrix. I want to find the eigenvector corresponding to the highest eigenvalue for this matrix. Can somebody point me to a straightforward numerical method for doing this? Thanks a lot in advance.
hi friends i tried to interface 4x4 matrix keypad to pic 16f877 can any give me the source code in C to check which key is pressed please post here your work and let the people see where you are facing the problem.
There are a couple of ways to scan a 4x4 matrix. This is one of them: Connect all 8 lines to the Pic. 4 of them will be configured as outputs and 4 as inputs. The inputs must be pulled high (I dont use Pics but I am sure the Pic has this feature). Make all the outputs high. Now in your program create a loop and one by one drop an output low, che
can anyone suggest any codes about using keil c to put 4x4 matrix key and 4 bit lcd routine to multiplex on the same pin. like P1_0 to P1_3 share the pin of row of keypad and 4 data pins of lcd ????