PHung Tung / WAV2

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Dependencies:   F746_GUI SD_PlayerSkeleton F746_SAI_IO

mbed_src_STM32F7/common/RawSerial.cpp@0:aa3fc5ad02f7, 2019-06-04 (annotated)

Committer:
phungductung
Date:
Tue Jun 04 09:08:29 2019 +0000
Revision:
0:aa3fc5ad02f7
SPKT

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phungductung 0:aa3fc5ad02f7 1 /* mbed Microcontroller Library
phungductung 0:aa3fc5ad02f7 2 * Copyright (c) 2006-2013 ARM Limited
phungductung 0:aa3fc5ad02f7 3 *
phungductung 0:aa3fc5ad02f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
phungductung 0:aa3fc5ad02f7 5 * you may not use this file except in compliance with the License.
phungductung 0:aa3fc5ad02f7 6 * You may obtain a copy of the License at
phungductung 0:aa3fc5ad02f7 7 *
phungductung 0:aa3fc5ad02f7 8 * http://www.apache.org/licenses/LICENSE-2.0
phungductung 0:aa3fc5ad02f7 9 *
phungductung 0:aa3fc5ad02f7 10 * Unless required by applicable law or agreed to in writing, software
phungductung 0:aa3fc5ad02f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
phungductung 0:aa3fc5ad02f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
phungductung 0:aa3fc5ad02f7 13 * See the License for the specific language governing permissions and
phungductung 0:aa3fc5ad02f7 14 * limitations under the License.
phungductung 0:aa3fc5ad02f7 15 */
phungductung 0:aa3fc5ad02f7 16 #include "RawSerial.h"
phungductung 0:aa3fc5ad02f7 17 #include "wait_api.h"
phungductung 0:aa3fc5ad02f7 18 #include <cstdarg>
phungductung 0:aa3fc5ad02f7 19
phungductung 0:aa3fc5ad02f7 20 #if DEVICE_SERIAL
phungductung 0:aa3fc5ad02f7 21
phungductung 0:aa3fc5ad02f7 22 #define STRING_STACK_LIMIT 120
phungductung 0:aa3fc5ad02f7 23
phungductung 0:aa3fc5ad02f7 24 namespace mbed {
phungductung 0:aa3fc5ad02f7 25
phungductung 0:aa3fc5ad02f7 26 RawSerial::RawSerial(PinName tx, PinName rx) : SerialBase(tx, rx) {
phungductung 0:aa3fc5ad02f7 27 }
phungductung 0:aa3fc5ad02f7 28
phungductung 0:aa3fc5ad02f7 29 int RawSerial::getc() {
phungductung 0:aa3fc5ad02f7 30 return _base_getc();
phungductung 0:aa3fc5ad02f7 31 }
phungductung 0:aa3fc5ad02f7 32
phungductung 0:aa3fc5ad02f7 33 int RawSerial::putc(int c) {
phungductung 0:aa3fc5ad02f7 34 return _base_putc(c);
phungductung 0:aa3fc5ad02f7 35 }
phungductung 0:aa3fc5ad02f7 36
phungductung 0:aa3fc5ad02f7 37 int RawSerial::puts(const char *str) {
phungductung 0:aa3fc5ad02f7 38 while (*str)
phungductung 0:aa3fc5ad02f7 39 putc(*str ++);
phungductung 0:aa3fc5ad02f7 40 return 0;
phungductung 0:aa3fc5ad02f7 41 }
phungductung 0:aa3fc5ad02f7 42
phungductung 0:aa3fc5ad02f7 43 // Experimental support for printf in RawSerial. No Stream inheritance
phungductung 0:aa3fc5ad02f7 44 // means we can't call printf() directly, so we use sprintf() instead.
phungductung 0:aa3fc5ad02f7 45 // We only call malloc() for the sprintf() buffer if the buffer
phungductung 0:aa3fc5ad02f7 46 // length is above a certain threshold, otherwise we use just the stack.
phungductung 0:aa3fc5ad02f7 47 int RawSerial::printf(const char *format, ...) {
phungductung 0:aa3fc5ad02f7 48 std::va_list arg;
phungductung 0:aa3fc5ad02f7 49 va_start(arg, format);
phungductung 0:aa3fc5ad02f7 50 // ARMCC microlib does not properly handle a size of 0.
phungductung 0:aa3fc5ad02f7 51 // As a workaround supply a dummy buffer with a size of 1.
phungductung 0:aa3fc5ad02f7 52 char dummy_buf[1];
phungductung 0:aa3fc5ad02f7 53 int len = vsnprintf(dummy_buf, sizeof(dummy_buf), format, arg);
phungductung 0:aa3fc5ad02f7 54 if (len < STRING_STACK_LIMIT) {
phungductung 0:aa3fc5ad02f7 55 char temp[STRING_STACK_LIMIT];
phungductung 0:aa3fc5ad02f7 56 vsprintf(temp, format, arg);
phungductung 0:aa3fc5ad02f7 57 puts(temp);
phungductung 0:aa3fc5ad02f7 58 } else {
phungductung 0:aa3fc5ad02f7 59 char *temp = new char[len + 1];
phungductung 0:aa3fc5ad02f7 60 vsprintf(temp, format, arg);
phungductung 0:aa3fc5ad02f7 61 puts(temp);
phungductung 0:aa3fc5ad02f7 62 delete[] temp;
phungductung 0:aa3fc5ad02f7 63 }
phungductung 0:aa3fc5ad02f7 64 va_end(arg);
phungductung 0:aa3fc5ad02f7 65 return len;
phungductung 0:aa3fc5ad02f7 66 }
phungductung 0:aa3fc5ad02f7 67
phungductung 0:aa3fc5ad02f7 68 } // namespace mbed
phungductung 0:aa3fc5ad02f7 69
phungductung 0:aa3fc5ad02f7 70 #endif