| Harald Welte | 361ed20 | 2019-02-24 21:15:39 +0100 | [diff] [blame] | 1 | /** |
| 2 | * \file |
| 3 | * |
| 4 | * \brief STDIO redirection terminal |
| 5 | * |
| 6 | * Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries. |
| 7 | * |
| 8 | * \asf_license_start |
| 9 | * |
| 10 | * \page License |
| 11 | * |
| 12 | * Subject to your compliance with these terms, you may use Microchip |
| 13 | * software and any derivatives exclusively with Microchip products. |
| 14 | * It is your responsibility to comply with third party license terms applicable |
| 15 | * to your use of third party software (including open source software) that |
| 16 | * may accompany Microchip software. |
| 17 | * |
| 18 | * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES, |
| 19 | * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE, |
| 20 | * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, |
| 21 | * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE |
| 22 | * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL |
| 23 | * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE |
| 24 | * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE |
| 25 | * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT |
| 26 | * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY |
| 27 | * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY, |
| 28 | * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE. |
| 29 | * |
| 30 | * \asf_license_stop |
| 31 | * |
| 32 | */ |
| 33 | |
| 34 | #include <stdio.h> |
| 35 | #include <stdio_io.h> |
| 36 | |
| 37 | /** IO descriptor for STDIO access. */ |
| 38 | static struct io_descriptor *stdio_io = NULL; |
| 39 | |
| 40 | void stdio_io_init(struct io_descriptor *io) |
| 41 | { |
| 42 | #if defined(__GNUC__) |
| 43 | /* Specify that stdout and stdin should not be buffered. */ |
| 44 | setbuf(stdout, NULL); |
| 45 | setbuf(stdin, NULL); |
| 46 | /* Note: Already the case in IAR's Normal DLIB default configuration |
| 47 | * and AVR GCC library: |
| 48 | * - printf() emits one character at a time. |
| 49 | * - getchar() requests only 1 byte to exit. |
| 50 | */ |
| 51 | #endif |
| 52 | stdio_io = io; |
| 53 | } |
| 54 | |
| 55 | void stdio_io_set_io(struct io_descriptor *io) |
| 56 | { |
| 57 | stdio_io = io; |
| 58 | } |
| 59 | |
| 60 | int32_t stdio_io_read(uint8_t *buf, const int32_t len) |
| 61 | { |
| 62 | if (stdio_io == NULL) { |
| 63 | return 0; |
| 64 | } |
| 65 | return io_read(stdio_io, buf, len); |
| 66 | } |
| 67 | |
| 68 | int32_t stdio_io_write(const uint8_t *buf, const int32_t len) |
| 69 | { |
| 70 | if (stdio_io == NULL) { |
| 71 | return 0; |
| 72 | } |
| 73 | return io_write(stdio_io, buf, len); |
| 74 | } |