syscalls.c

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// Copyright (c) Acconeer AB, 2019-2023
// All rights reserved
// This file is subject to the terms and conditions defined in the file
// 'LICENSES/license_acconeer.txt', (BSD 3-Clause License) which is part
// of this source code package.
 
#include <errno.h>
#include <stdint.h>
#include <sys/stat.h>
 
#include "main.h"
 
extern UART_HandleTypeDef DEBUG_UART_HANDLE;
 
int _fstat(int file, struct stat *st)
{
        (void)file;
 
        st->st_mode = S_IFCHR;
        return 0;
}
 
int _close(int file)
{
        (void)file;
 
        return -1;
}
 
int _getpid(void)
{
        return 1;
}
 
int _isatty(int file)
{
        (void)file;
 
        return 1;
}
 
int _lseek(int file, int ptr, int dir)
{
        (void)file;
        (void)ptr;
        (void)dir;
 
        return 0;
}
 
int _kill(int pid, int sig)
{
        (void)pid;
        (void)sig;
 
        errno = EINVAL;
        return -1;
}
 
int _read(int file, char *ptr, int len)
{
        (void)file;
        (void)ptr;
        (void)len;
 
        return -1;
}
 
int _write(int file, char *ptr, int len)
{
        (void)file;
        HAL_UART_Transmit(&DEBUG_UART_HANDLE, (uint8_t *)ptr, len, 0xFFFF);
        return len;
}