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euem789's avatar
euem789
Icon for New Contributor rankNew Contributor
6 years ago
Solved

file io with NIOS II

Hi all I wrote a code to read the text file for implementing in FPGA board (DE1-SOC) with NIOS II , but when I build the project, the elf file wasn't generated. here's my code ----------...
  • EricMunYew_C_Intel's avatar
    EricMunYew_C_Intel
    5 years ago

    Hi, Dong Wook


    You are right.


    However, there is another way, ie using a character-mode device like UART.


    Below example is to write characters to a UART called uart1. You can find the device name (/dev/uart1) in the system.h

    #include <stdio.h>

    #include <string.h>


    int main (void)

    {

    char* msg = "hello world";

    FILE* fp;

    fp = fopen ("/dev/uart1", "w");

    if (fp!=NULL) { fprintf(fp, "%s",msg); fclose (fp);}

    return 0;

    }


    Thanks.


    Eric










EricMunYew_C_Intel's avatar
EricMunYew_C_Intel
Icon for Frequent Contributor rankFrequent Contributor
5 years ago

Hi, Dong Wook


Can you try to enable the altera_hostfs in your BSP Editor under Software Packages tab (to enable HAL file system) ?


There is mount point which within the HAL file system. For example, if you name the mount point /mnt/host and the project directory on you host computer is /sofware/project1, in a HAL-based program, the following code opens the file /sofware/project1/datafile.dat.:

fopen(“/mnt/host/datafile.dat”, “r”);



Thanks.


Eric