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100 lines
3.3 KiB
C
100 lines
3.3 KiB
C
/**
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******************************************************************************
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* @file Getline.c
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* @author William Xu
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* @version V2.0.0
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* @date 05-Oct-2014
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* @brief Line Edited Character Input
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******************************************************************************
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*
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* The MIT License
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* Copyright (c) 2014 MXCHIP Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is furnished
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* to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
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* IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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******************************************************************************
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*/
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#include <stdio.h>
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#include "common.h" /* global project definition file */
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#include "mico.h"
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#include "platform_config.h"
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#define CNTLQ 0x11
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#define CNTLS 0x13
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#define DEL 0x7F
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#define BACKSPACE 0x08
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#define CR 0x0D
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#define LF 0x0A
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static void uart_putchar( int c )
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{
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MicoUartSend( STDIO_UART, &c, 1 );
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}
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/***************/
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/* Line Editor */
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/***************/
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void getline (char *line, int n) {
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int cnt = 0;
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char c;
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do {
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MicoUartRecv( STDIO_UART, &c, 1, MICO_NEVER_TIMEOUT );
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if (c == CR) c = LF; /* read character */
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if (c == BACKSPACE || c == DEL) { /* process backspace */
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if (cnt != 0) {
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cnt--; /* decrement count */
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line--; /* and line pointer */
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uart_putchar (BACKSPACE); /* echo backspace */
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uart_putchar (' ');
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uart_putchar (BACKSPACE);
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}
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}
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else if (c != CNTLQ && c != CNTLS) { /* ignore Control S/Q */
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uart_putchar (*line = c); /* echo and store character */
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line++; /* increment line pointer */
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cnt++; /* and count */
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}
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} while (cnt < n - 1 && c != LF); /* check limit and line feed */
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*(line - 1) = 0; /* mark end of string */
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}
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#ifdef MICO_ENABLE_STDIO_TO_BOOT
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int stdio_break_in(void)
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{
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uint8_t c;
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int i, j;
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for(i=0, j=0;i<10;i++) {
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if (kNoErr != MicoUartRecv( STDIO_UART, &c, 1, 10))
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continue;
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if (c == 0x20) {
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j++;
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if (j > 3)
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return 1;
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} else {
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j = 0;
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}
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}
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return 0;
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}
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#endif
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