• interfacing eeprom with 89c52

    jeni a
    jeni a

    Hi... Am new to this site... please can any one help me...
    I need to interface AT24c64 with 89c52. here is my asm code... i cannot write even 00h to eeprom.
    please debug my code and guide me...

    org 0000h
    sjmp start
    start:
           mov p1,#0ffh   ; initializing…

    • over 7 years ago
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  • rfid with more than 10cm distance. does it exists ?

    gassy pants
    gassy pants

    Dear friends,

    sorry in the bad first massege.

    I still needed to build a man door with arm.I searched rfid shields butthat work from 10cm distance which is too small. then I looked after other rfid reader/tag solutions not for people, and I could…

    • over 7 years ago
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  • 8051 microcontroller- muhammed ali mazidi

    chandra Sekaran
    chandra Sekaran

    doc.nit.ac.ir/.../3-Mazidi-8051.pdf

    • over 7 years ago
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  • hex file problem

    usman ali butt
    usman ali butt

    HI friends!
    Their is a small problem can any one plz resolve it.........
    when i load the hex file in G540 hex file burner it just only loads three bytes can any one plz help me out what this problem is?
    i am using windows 7 64 bit.....

    does 64 bit…

    • over 7 years ago
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  • software slsection

    AJITKUMAR VK
    AJITKUMAR VK

    sir
    My projects are mostly used AT89c2051 uc,
    Please tell me which keil product (C51,C251)
    for sutable me.I need to helpfull for PWM purpose also

    Thanks

    Ajitkumar

    • over 8 years ago
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  • FLAOTING POINT PROBLEMS

    c puckum
    c puckum

    HELLO ALL,

    I have a problem with a floating point number. How can 12.11 become in 2142.11000000000013 (I look in debug).

    I refer in this case too.

    I know floating point is a big problem for any other computer. but is a lean answer always not right…

    • over 7 years ago
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  • WIRELESS NOTICE BOARD

    MOULI T.
    MOULI T.

    we are using ASK module RF transmitter and receiver and AT 89c51 controller..... i need to transmitt the data from PC to trnsmitter and receive it in the receiver side and display in LCD display... how the PC and transmitter is connected....by what means…

    • over 9 years ago
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  • CONDITIONAL BREAKPOINT

    amol bhrd
    amol bhrd

    I am trying to use a conditional break-point on a xdata variable. I want to trigger the break-point whenever the variable is written. I am using SiLabs c8051F361 controller. Is it possible to set such a kind of break-point while debugging? The manual…

    • over 7 years ago
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  • How can i get OMF251 specification

    FENG QIANG
    FENG QIANG

    OMF51 is open and downloadable, but where i can find OMF251 spec?
    Thanks

    • over 8 years ago
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  • RTC in basis of SPI

    musfiqur rahim
    musfiqur rahim

    Hi.. Is there any RTC that working in the basis of SPI,that avail in the Proteus.I have tried for ds3234..can be body suggest me.

    Thanks in advance.

    • over 8 years ago
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  • Expression

    musfiqur rahim
    musfiqur rahim

    hi..can any body tell,the expression s=((a/16*10) + (a%16)) belongs to which conversion?????

    • over 8 years ago
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  • eeprom interfacing with the microcontroller(89c51)

    akppppp kumara
    akppppp kumara

    Dear neil, whats the difference between eeprom 24C01, 24C02, 24C04, 24C08, 24C16 .

    • over 8 years ago
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  • Generating Hex file in uvision V1.31 - Problems in uVision V4

    N POFFA
    N POFFA

    Hi,

    I have problems with my Hex file generated by uVision 4.

    My original project built in uVision V1.31 was generating an Hex file to work on a 80C251SB16

    Now that I have rebuilt my project with the same code files in uVision V4, there seems to…

    • over 9 years ago
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  • query about rtc ds1307

    arnica jain
    arnica jain

    hi sir,
    i am new to this rtc ds1307 and want to know dat according to its datasheet it is battery backed....does that mean that you need not initialize it when you use it for the first time?????

    and if i want to simulate it on proteus software it shows…

    • over 9 years ago
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  • Potential Problems in Using Global Register Coloring

    Gurudeep Singh
    Gurudeep Singh

    Dear All,

    I'm thinking about using global register coloring option but can't be sure of
    what potential problems might come up after implementing it.

    I'm using C251 compiler for SLE70 family.

    I've heard that global register coloring…

    • over 9 years ago
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  • Code size Increased Unreasonably!

    Gsachan Sachan
    Gsachan Sachan

    Hi Everyone,

    I'm using C251 compiler with optimization level 9 with 'size' emphasis. I've a function similar to one given below.

    int * fun(short* param1, Boolean param2){

    //..........code goes here
    }

    This function is being called…

    • over 9 years ago
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  • How can i import a lib twice

    FENG QIANG
    FENG QIANG

    because projects need, i have to import ?C?LIB_CODE twice.(One LIB_CODE start at 0xF80000, another start at 0xFD0000). The usr code call function in LIB_CODE which is in 0xF80000, sys code call functions in LIB_CODE which is in 0xFD0000. For the needs…

    • over 8 years ago
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  • 8051 vs 80251

    eliahu c.
    eliahu c.

    Hi all

    what are basic differences between the 8051 family and the 80251 family ?

    Are they close family relatives?

    Thanks
    Eliahu

    • over 8 years ago
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  • prepaid electricity billing system using gsm modem

    chandan bk
    chandan bk

    Hello everyone,

    I am working on a project for prepaid electricity billing system using gsm modem, this is the source code, but I don have the header files. Can anyone mail the appropriate header files for this source code.

    I basically need lcd.h…

    • over 9 years ago
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  • please help

    nur hidayah mohamad
    nur hidayah mohamad

    hi..nice to meet u all..i'm hidayah..i need a help about my project.i'm using microcontroller 8051, P89V51RD2 BY NXP PHILIPS.my project quite same to this link ece-projects.blogspot.com/.../injection-pump-using-microcontroller.html
    u can download…

    • over 8 years ago
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  • .a51 conversion help!

    Salmani Ali
    Salmani Ali


    Hi all,
    i have made a code in C language for my project Combinational lock using 80c51 micro controller and now i want to make .a51 assembler file of my code so that i'll be able to make .Hex file from it. what is the procedure to do this. please guide…

    • over 10 years ago
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  • 2nd UART on at89c51re2

    Michael Reizing
    Michael Reizing

    Hello!

    I have problem with configuration of UART_1 on at89c51re2 micro controller I supposed that is because I am using a at89c51xd2.h header file which does not include definition for UART_1. When I try to define
    Sbit (ES1 , 0xB1, 3);
    in IEN1 (0xB1…

    • over 8 years ago
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  • 4 minutes

    i latteth
    i latteth

    Hello! Hello! Hello!

    . I just got my devboard working trough a viritual machine with windows XP running on it. And while i was looking for stuff i stumbled upon a page.

    Now i have a few questions:

    Exactly what will new code change to my board?…

    • over 8 years ago
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  • message from jamil

    jamil jamil
    jamil jamil

    my name is jamil.

    what is this code?

    GTWD2: MOV DPH,#WKPAGE ; MOV DPL,#APPTR ; MOVX A,@DPTR ; GET APP POINTER ISB MOV PORT2,A ; MOV DPH,#WKPAGE ; MOV DPL,#APPTR+1 ; MOV DPH,#WKPAGE ; MOVX A,@DPTR ; ADD A,#3 ; INCREMENT APE POINTER TO WD4 OF APE MOV…

    • over 9 years ago
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  • execution in ram memory

    amar prem
    amar prem

    can we execute the code in ram memory in lpc915...if yes,how?

    • over 9 years ago
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