76 lines
1.3 KiB
C
76 lines
1.3 KiB
C
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/*
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* Copyright (c) 2006-2018, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2017/10/15 bernard implement stdio for armcc.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <rtthread.h>
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#include "libc.h"
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#if defined(RT_USING_DFS) && defined(RT_USING_DFS_DEVFS)
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#include <dfs_posix.h>
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#define STDIO_DEVICE_NAME_MAX 32
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static int std_fd = -1;
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int libc_stdio_set_console(const char* device_name, int mode)
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{
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int fd;
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char name[STDIO_DEVICE_NAME_MAX];
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snprintf(name, sizeof(name) - 1, "/dev/%s", device_name);
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name[STDIO_DEVICE_NAME_MAX - 1] = '\0';
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fd = open(name, mode, 0);
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if (fd >= 0)
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{
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if (std_fd >= 0)
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{
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close(std_fd);
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}
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std_fd = fd;
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}
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return std_fd;
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}
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int libc_stdio_get_console(void)
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{
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return std_fd;
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}
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int libc_stdio_read(void *buffer, size_t size)
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{
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if (std_fd >= 0)
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{
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return read(std_fd, buffer, size);
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}
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else
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{
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rt_kprintf("Illegal stdio input!\n");
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return 0;
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}
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}
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int libc_stdio_write(const void *buffer, size_t size)
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{
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if (std_fd >= 0)
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{
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return write(std_fd, buffer, size);
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}
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else
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{
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rt_kprintf("Illegal stdio output!\n");
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return size;
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}
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}
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#endif
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