i wanna use highlevel file io multi use

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1

i use high level file io to control GPIO pins

i wanna use like general MCU port register (use 8bit). so i’m writing eight file functions.

but appear this compile error.

/tmp/ccP4wrXQ.o: In function main': led_blink.c:(.text+0x598): undefined reference to pin_wirte’
collect2: ld returned 1 exit status

when i use only two ‘pin_write’ function, there is no error.
what’s wrong is this??

#ifndef BB_GPIO_H_
#define BB_GPIO_H_

#include <stdio.h>
#include <string.h>

/********************************************

  • BB_GPIO headerfile
  • This file only used to gpio control
  • other feature using device-tree-overlay
  • when using GPIO, the pin work to MODE7
    *=====formula======
  • GPIO N1[N2]
  • gpio_number = (32 x N1) + N2
2

Maybe I missunderstood, but are the gpio functions declared in the header file?

Btw, I know that this was not your question, but you may take a look at libsoc:
https://github.com/jackmitch/libsoc it has wrappers for all that gpio functions…

3

The error message says it all. Check for typos.