9 years, 1 month ago.

How to read a file in file system

Hi, Here is the thing: I'm doing a project which I wanna the EFM32 Giant Gecko board be able to read the .txt file from its filesystem. So is there anyone who knows how am I suppose to do it?

Right now, I am using the stand way that how to read a file in a pc.

I have a function like this:

1. include <stdio.h>
2. include <stdlib.h>

char *readFile(char *fileName) { FILE *file = fopen(fileName, "r"); char *code; size_t n = 0; int c;

if (file == NULL) return NULL; could not open file fseek(file, 0, SEEK_END); long f_size = ftell(file); fseek(file, 0, SEEK_SET); code = (char *)malloc(f_size);

while ((c = fgetc(file)) != EOF) { code[n++] = (char)c; }

code[n] = '\0';

return code; }

And in my main I want to call it, and assign the return value to an Array

int main() { char *script; script = readFile("F:\s.txt"); luaL_loadstring(l, script); lua_pcall(l, 0, 0, 0);

return 0; }

But it seems the function can never reach the file which I specify. When I debug the program, it always stops at "if (file == NULL) return NULL; could not open file" So I suppose the board just can't find the file,is there anyone who knows how to fix this xD

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