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Recent content by adamarul

  1. A

    Problem with i2c code for lpc2138

    Also, why is that the value set in the register I2CCONSET gets cleared during runtime., SI bit in particular ? Is this a hardware driven register ? that is., does this register value change based on any hardware event ?
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    Problem with i2c code for lpc2138

    Hi All, I am using lpc2138 as i2c master to read eight ADCs(AD7400) using a mux(PCA9548a). After sending the slave address, i see only level high(NACK) in the SDA line instead of level 0(ACK). Attached the code and simulator screenshot(image location...
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    calloc() allocates only contiguous memory?

    Hi all, when will malloc allocate non contiguous memory?if it is not contiguous,then there is no need to call the memory as a "block". So I think, malloc and calloc allocate memory in blocks.two blocks may or may not be contiguous but memory within a block will obviously be contiguous!!!!
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    problem with bank switching in 8051 ...

    Hi all, I am using code banking in AT89c51RE2.my controller is not switching between functions at different banks.The controller skips the functions defined at banks other than the current bank.however the functions work properly if coded to use the same bank.Also i dont know how to use the...
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    DLMS protocol-reg - request for resources

    DLMS protocol-reg Hi all, I am currently working on a project which involves DLMS COSEM implementation.It would be really helpful for me if you could share your ideas regarding this one. with regards, Adam arul
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    problem with serial ISR in 8051-reg

    hi all, i am facing a peculiar problem with serial port access. I ve made an LED to blink when any data is received(i ve made the LED port pin toggle inside the serial ISR).I have not connected any device to serial port.when i transfer any data through the serial port,i could find the LED...
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    flash programming at89c51re2-reg

    hi all, i am using at89c51re2(dual uart 8051).which port should i use for programming the controller???
  8. A

    what does 433.92MHz stand for??

    433.92mhz hi all, I am involved in the design of RF based transmission.I am using HT12E & HT12D along with tx and rx modules in my project.I was said that the entire RF system works at433.92MHz frequency. what is that 433.92MHz ...is it the clock frequency for Encoder/Decoder or Transmitter...
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    TTL output at serial port without ext.hardware???

    ttl output hi all, is it possible to get TTL output at serial port without using any external harware (like max232).if not is it possible to interface USB port directly to the AT89S52 microcontroller?? my aim is to design a programmer for AT89S52 without any exteranl hardware!!!!
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    Developing an ISP for AT89S52

    s in at89s52 Thanks to mvs sarma,sau_sol and microcon555.your ideas and suggestions have tempted me to develope much bigger projects than i thought of doing. I am really interested to develop an USB programmer.however i am yet to know about the protocol.I also think that some external circuit...
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    Developing an ISP for AT89S52

    instrucciones del at89s52 I didnt find any intermediate module requirement in the manual. also an intermediate hardware module is not necessary when u go for labview. i have come to know that the project can be done by "bit bang" application.
  12. A

    Developing an ISP for AT89S52

    hi all, I am involved in the development of an ISP for AT89S52.I ve come to know through pdf s that no external device(except PC) is required for programming the controller.I am using labview for Hex file reading and sending data to the controller.The following are the doubts i have: 1.which...
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    CAN protocol in Labview - request for resources

    can protocol using labview Hi all, can anyone suggest me some good web links for implementing CAN protocol using Labview?what are the additional softwares(Drivers)/Hardwares required to implement CAN protocol with Labview?
  14. A

    flash tutorial for microcontrollers

    microcontroller animated tutorial hi all, can anyone reply me where to find flash/animated tutorial for microcontrollers like 8051,PIC16F877,LPC2129 etc.....??
  15. A

    JTAG alternate for ARM7TDMI(LPC2129)?????

    lpc2129 hi all, my botherboard supports external communication only through USB and serial port(DB9 connector).If i want to work on LPC2129 with my system, is there any alternate for the JTAG for programming my microcontroller?
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