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Dependents: TYBLE16_simple_data_logger TYBLE16_MP3_Air
RawSerial.cpp
00001 /* mbed Microcontroller Library 00002 * Copyright (c) 2006-2019 ARM Limited 00003 * SPDX-License-Identifier: Apache-2.0 00004 * 00005 * Licensed under the Apache License, Version 2.0 (the "License"); 00006 * you may not use this file except in compliance with the License. 00007 * You may obtain a copy of the License at 00008 * 00009 * http://www.apache.org/licenses/LICENSE-2.0 00010 * 00011 * Unless required by applicable law or agreed to in writing, software 00012 * distributed under the License is distributed on an "AS IS" BASIS, 00013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00014 * See the License for the specific language governing permissions and 00015 * limitations under the License. 00016 */ 00017 #include "drivers/RawSerial.h" 00018 #include <stdio.h> 00019 00020 00021 #if DEVICE_SERIAL 00022 00023 #define STRING_STACK_LIMIT 120 00024 00025 namespace mbed { 00026 00027 RawSerial::RawSerial(PinName tx, PinName rx, int baud) : SerialBase(tx, rx, baud) 00028 { 00029 // No lock needed in the constructor 00030 } 00031 00032 int RawSerial::getc() 00033 { 00034 lock(); 00035 int ret = _base_getc(); 00036 unlock(); 00037 return ret; 00038 } 00039 00040 int RawSerial::putc(int c) 00041 { 00042 lock(); 00043 int ret = _base_putc(c); 00044 unlock(); 00045 return ret; 00046 } 00047 00048 int RawSerial::puts(const char *str) 00049 { 00050 lock(); 00051 while (*str) { 00052 putc(*str ++); 00053 } 00054 unlock(); 00055 return 0; 00056 } 00057 00058 // Experimental support for printf in RawSerial. No Stream inheritance 00059 // means we can't call printf() directly, so we use sprintf() instead. 00060 // We only call malloc() for the sprintf() buffer if the buffer 00061 // length is above a certain threshold, otherwise we use just the stack. 00062 int RawSerial::printf(const char *format, ...) 00063 { 00064 std::va_list arg; 00065 va_start(arg, format); 00066 int len = this->vprintf(format, arg); 00067 va_end(arg); 00068 return len; 00069 } 00070 00071 int RawSerial::vprintf(const char *format, std::va_list arg) 00072 { 00073 lock(); 00074 // ARMCC microlib does not properly handle a size of 0. 00075 // As a workaround supply a dummy buffer with a size of 1. 00076 char dummy_buf[1]; 00077 int len = vsnprintf(dummy_buf, sizeof(dummy_buf), format, arg); 00078 if (len < STRING_STACK_LIMIT) { 00079 char temp[STRING_STACK_LIMIT]; 00080 vsprintf(temp, format, arg); 00081 puts(temp); 00082 } else { 00083 char *temp = new char[len + 1]; 00084 vsprintf(temp, format, arg); 00085 puts(temp); 00086 delete[] temp; 00087 } 00088 unlock(); 00089 return len; 00090 } 00091 00092 /** Acquire exclusive access to this serial port 00093 */ 00094 void RawSerial::lock() 00095 { 00096 // No lock used - external synchronization required 00097 } 00098 00099 /** Release exclusive access to this serial port 00100 */ 00101 void RawSerial::unlock() 00102 { 00103 // No lock used - external synchronization required 00104 } 00105 00106 } // namespace mbed 00107 00108 #endif
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