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FRDM-KL25Z can not communicate with TeraTerm

Mahmoud AlQuzwini

Hi,

I have a program written in ARM assembly language, the task is to display a character on TeraTerm terminal. I have tried to run the program using different version of Keil microvision MDK522, MDK521a and MDK513 but it did not work with any of them. my code is correct because when I have tested it with a PC at laboratory, it worked fine. I am using teraterm version 4.93. I am using FRDM-KL25Z evaluation board and the debugger is PEMicro Debugger.

Thanks

Parents
  • 0 in reply to Mahmoud AlQuzwini

    So if you have ruled out your code, the next logical place would be at the OS and driver versions used on the machines that it doesn't work on vs the ones it does?

    If I were debugging a UART problem, I'd have the code send a continuous stream of 'U' characters and scope the signal to confirm all the timings and signals were in order.

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  • 0 in reply to Mahmoud AlQuzwini

    So if you have ruled out your code, the next logical place would be at the OS and driver versions used on the machines that it doesn't work on vs the ones it does?

    If I were debugging a UART problem, I'd have the code send a continuous stream of 'U' characters and scope the signal to confirm all the timings and signals were in order.

Children
  • 0 in reply to Westonsupermare Pier

    If your assembler program works in the card, then it can't be the fault of uVision that you transport your card home - or bring your PC to school - and the serial transfer stops working.

    Laptops seldom have serial ports today. Is yours? Or are you using a USB-to-serial adapter? Is it correctly installed?

    What is the difference between your laptop and your PC?

    Can the laptop communicate with your PC using a null-modem cable?

    And is your board using RS-232 signals? Or is the board communicating using logic-level signals, and the PC is using a 3V3-to-USB or 5V-to-USB serial adapter cable?

    As a teacher, I would expect you to have the a methodology for how to analyze the problem and eliminate different potential sources to the problem.