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Altera_Forum's avatar
Altera_Forum
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16 years ago

uart RS232 communication problem

Hi all,

I have cyclone2 dev kit. I tried running uart program given in the Embedded Peripherals pdf but there is no output on the hyperterminal. I have set the baud rate to 9600 and i have changed it in the system.h also. But the program is neither taking any input from hyperterminal nor sending any output. What could be the solution for this? Do I need to modify the code?

Even this simple code is not working!

int main (void)

{

char* msg = "hello world";

FILE* fp;

fp = fopen ("/dev/uart_0", "w");

if (fp!=NULL)

{

fprintf(fp, "%s",msg);

fclose (fp);

}

return 0;

}

Thanks,

Nishant

8 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    Have you tried simulation? Is it something like it is working fine in simulation but not in the practical case.

  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    No, I tried running the program on simulator but it doesn't run there either. May be it needs some hardware support to run.

  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    simulator doesn't need any hardware support.

    if it doesn't run in simulator , doesn't take i/ps and o/ps there is something absolutely wrong in the way in which you incorporated your UART in the VHDL/verilog project.

    if the QUARTUSII isn't giving any kind of errors while compiling your project, atleast you can check the warnings to get an idea.

    I think it is something basic that you are missing out here
  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    Thanks for the directions. I get these warnings when I try run in Instruction Set Simulator. Do I need use SOPC builder to correct these.

    Please guide me further. Thanks.

    Warning : SOPC Builder system component led_red is not supported by the simulato

    r. Simulation may be incorrect if your software attempts to access it

    Warning : SOPC Builder system component led_green is not supported by the simula

    tor. Simulation may be incorrect if your software attempts to access it

    Warning : SOPC Builder system component button_pio is not supported by the simulator. Simulation may be incorrect if your software attempts to access it

    Warning : SOPC Builder system component switch_pio is not supported by the simulator. Simulation may be incorrect if your software attempts to access it

    Warning : SOPC Builder system component SEG7_Display is not supported by the simulator. Simulation may be incorrect if your software attempts to access it

    Warning : SOPC Builder system component sram_0 is not supported by the simulator. Simulation may be incorrect if your software attempts to access it

    Warning : SOPC Builder system component Audio_0 is not supported by the simulator. Simulation may be incorrect if your software attempts to access it

    Warning : SOPC Builder system component SD_DAT is not supported by the simulator. Simulation may be incorrect if your software attempts to access it

    Warning : SOPC Builder system component SD_CMD is not supported by the simulator. Simulation may be incorrect if your software attempts to access it

    Warning : SOPC Builder system component SD_CLK is not supported by the simulator. Simulation may be incorrect if your software attempts to access it
  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    What is QUARTUSII project? What is the file extension? and what do I need to do to modify it?

    Thanks for the reply!
  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    The warning says The simulator cannot simulate buttons, LEDs, and other physical things. You can ignore these messages.

    have you set the startup type to ROMRAM
  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    Actually I am able to run other programs like using jtag_uart_0 but the proble is with using uart.

    Whare to set startup type to ROMRAM?

    Thanks
  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    when i run the program on DE2 to do the ETHERNET test ,I also meet these warnings . NOw i havn't run a program in DE2_demonstrations .