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common/RawSerial.cpp@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Child:
47:e32b5dd8af6d
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 0:9b334a45a8ff 3 *
bogdanm 0:9b334a45a8ff 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 0:9b334a45a8ff 5 * you may not use this file except in compliance with the License.
bogdanm 0:9b334a45a8ff 6 * You may obtain a copy of the License at
bogdanm 0:9b334a45a8ff 7 *
bogdanm 0:9b334a45a8ff 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 0:9b334a45a8ff 9 *
bogdanm 0:9b334a45a8ff 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 0:9b334a45a8ff 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 0:9b334a45a8ff 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 0:9b334a45a8ff 13 * See the License for the specific language governing permissions and
bogdanm 0:9b334a45a8ff 14 * limitations under the License.
bogdanm 0:9b334a45a8ff 15 */
bogdanm 0:9b334a45a8ff 16 #include "RawSerial.h"
bogdanm 0:9b334a45a8ff 17 #include "wait_api.h"
bogdanm 0:9b334a45a8ff 18 #include <cstdarg>
bogdanm 0:9b334a45a8ff 19
bogdanm 0:9b334a45a8ff 20 #if DEVICE_SERIAL
bogdanm 0:9b334a45a8ff 21
bogdanm 0:9b334a45a8ff 22 #define STRING_STACK_LIMIT 120
bogdanm 0:9b334a45a8ff 23
bogdanm 0:9b334a45a8ff 24 namespace mbed {
bogdanm 0:9b334a45a8ff 25
bogdanm 0:9b334a45a8ff 26 RawSerial::RawSerial(PinName tx, PinName rx) : SerialBase(tx, rx) {
bogdanm 0:9b334a45a8ff 27 }
bogdanm 0:9b334a45a8ff 28
bogdanm 0:9b334a45a8ff 29 int RawSerial::getc() {
bogdanm 0:9b334a45a8ff 30 return _base_getc();
bogdanm 0:9b334a45a8ff 31 }
bogdanm 0:9b334a45a8ff 32
bogdanm 0:9b334a45a8ff 33 int RawSerial::putc(int c) {
bogdanm 0:9b334a45a8ff 34 return _base_putc(c);
bogdanm 0:9b334a45a8ff 35 }
bogdanm 0:9b334a45a8ff 36
bogdanm 0:9b334a45a8ff 37 int RawSerial::puts(const char *str) {
bogdanm 0:9b334a45a8ff 38 while (*str)
bogdanm 0:9b334a45a8ff 39 putc(*str ++);
bogdanm 0:9b334a45a8ff 40 return 0;
bogdanm 0:9b334a45a8ff 41 }
bogdanm 0:9b334a45a8ff 42
bogdanm 0:9b334a45a8ff 43 // Experimental support for printf in RawSerial. No Stream inheritance
bogdanm 0:9b334a45a8ff 44 // means we can't call printf() directly, so we use sprintf() instead.
bogdanm 0:9b334a45a8ff 45 // We only call malloc() for the sprintf() buffer if the buffer
bogdanm 0:9b334a45a8ff 46 // length is above a certain threshold, otherwise we use just the stack.
bogdanm 0:9b334a45a8ff 47 int RawSerial::printf(const char *format, ...) {
bogdanm 0:9b334a45a8ff 48 std::va_list arg;
bogdanm 0:9b334a45a8ff 49 va_start(arg, format);
bogdanm 0:9b334a45a8ff 50 int len = vsnprintf(NULL, 0, format, arg);
bogdanm 0:9b334a45a8ff 51 if (len < STRING_STACK_LIMIT) {
bogdanm 0:9b334a45a8ff 52 char temp[STRING_STACK_LIMIT];
bogdanm 0:9b334a45a8ff 53 vsprintf(temp, format, arg);
bogdanm 0:9b334a45a8ff 54 puts(temp);
bogdanm 0:9b334a45a8ff 55 } else {
bogdanm 0:9b334a45a8ff 56 char *temp = new char[len + 1];
bogdanm 0:9b334a45a8ff 57 vsprintf(temp, format, arg);
bogdanm 0:9b334a45a8ff 58 puts(temp);
bogdanm 0:9b334a45a8ff 59 delete[] temp;
bogdanm 0:9b334a45a8ff 60 }
bogdanm 0:9b334a45a8ff 61 va_end(arg);
bogdanm 0:9b334a45a8ff 62 return len;
bogdanm 0:9b334a45a8ff 63 }
bogdanm 0:9b334a45a8ff 64
bogdanm 0:9b334a45a8ff 65 } // namespace mbed
bogdanm 0:9b334a45a8ff 66
bogdanm 0:9b334a45a8ff 67 #endif