Thomas Lyp / DevLibMemoryController

Initial commit

Dependencies:   FastPWM

mbed-dev-master/drivers/RawSerial.cpp@0:bb348c97df44, 2020-09-16 (annotated)

Committer:
lypinator
Date:
Wed Sep 16 01:11:49 2020 +0000
Revision:
0:bb348c97df44
Added PWM

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lypinator 0:bb348c97df44 1 /* mbed Microcontroller Library
lypinator 0:bb348c97df44 2 * Copyright (c) 2006-2013 ARM Limited
lypinator 0:bb348c97df44 3 *
lypinator 0:bb348c97df44 4 * Licensed under the Apache License, Version 2.0 (the "License");
lypinator 0:bb348c97df44 5 * you may not use this file except in compliance with the License.
lypinator 0:bb348c97df44 6 * You may obtain a copy of the License at
lypinator 0:bb348c97df44 7 *
lypinator 0:bb348c97df44 8 * http://www.apache.org/licenses/LICENSE-2.0
lypinator 0:bb348c97df44 9 *
lypinator 0:bb348c97df44 10 * Unless required by applicable law or agreed to in writing, software
lypinator 0:bb348c97df44 11 * distributed under the License is distributed on an "AS IS" BASIS,
lypinator 0:bb348c97df44 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
lypinator 0:bb348c97df44 13 * See the License for the specific language governing permissions and
lypinator 0:bb348c97df44 14 * limitations under the License.
lypinator 0:bb348c97df44 15 */
lypinator 0:bb348c97df44 16 #include "drivers/RawSerial.h"
lypinator 0:bb348c97df44 17 #include "platform/mbed_wait_api.h"
lypinator 0:bb348c97df44 18 #include <stdio.h>
lypinator 0:bb348c97df44 19 #include <cstdarg>
lypinator 0:bb348c97df44 20
lypinator 0:bb348c97df44 21
lypinator 0:bb348c97df44 22 #if DEVICE_SERIAL
lypinator 0:bb348c97df44 23
lypinator 0:bb348c97df44 24 #define STRING_STACK_LIMIT 120
lypinator 0:bb348c97df44 25
lypinator 0:bb348c97df44 26 namespace mbed {
lypinator 0:bb348c97df44 27
lypinator 0:bb348c97df44 28 RawSerial::RawSerial(PinName tx, PinName rx, int baud) : SerialBase(tx, rx, baud)
lypinator 0:bb348c97df44 29 {
lypinator 0:bb348c97df44 30 // No lock needed in the constructor
lypinator 0:bb348c97df44 31 }
lypinator 0:bb348c97df44 32
lypinator 0:bb348c97df44 33 int RawSerial::getc()
lypinator 0:bb348c97df44 34 {
lypinator 0:bb348c97df44 35 lock();
lypinator 0:bb348c97df44 36 int ret = _base_getc();
lypinator 0:bb348c97df44 37 unlock();
lypinator 0:bb348c97df44 38 return ret;
lypinator 0:bb348c97df44 39 }
lypinator 0:bb348c97df44 40
lypinator 0:bb348c97df44 41 int RawSerial::putc(int c)
lypinator 0:bb348c97df44 42 {
lypinator 0:bb348c97df44 43 lock();
lypinator 0:bb348c97df44 44 int ret = _base_putc(c);
lypinator 0:bb348c97df44 45 unlock();
lypinator 0:bb348c97df44 46 return ret;
lypinator 0:bb348c97df44 47 }
lypinator 0:bb348c97df44 48
lypinator 0:bb348c97df44 49 int RawSerial::puts(const char *str)
lypinator 0:bb348c97df44 50 {
lypinator 0:bb348c97df44 51 lock();
lypinator 0:bb348c97df44 52 while (*str) {
lypinator 0:bb348c97df44 53 putc(*str ++);
lypinator 0:bb348c97df44 54 }
lypinator 0:bb348c97df44 55 unlock();
lypinator 0:bb348c97df44 56 return 0;
lypinator 0:bb348c97df44 57 }
lypinator 0:bb348c97df44 58
lypinator 0:bb348c97df44 59 // Experimental support for printf in RawSerial. No Stream inheritance
lypinator 0:bb348c97df44 60 // means we can't call printf() directly, so we use sprintf() instead.
lypinator 0:bb348c97df44 61 // We only call malloc() for the sprintf() buffer if the buffer
lypinator 0:bb348c97df44 62 // length is above a certain threshold, otherwise we use just the stack.
lypinator 0:bb348c97df44 63 int RawSerial::printf(const char *format, ...)
lypinator 0:bb348c97df44 64 {
lypinator 0:bb348c97df44 65 lock();
lypinator 0:bb348c97df44 66 std::va_list arg;
lypinator 0:bb348c97df44 67 va_start(arg, format);
lypinator 0:bb348c97df44 68 // ARMCC microlib does not properly handle a size of 0.
lypinator 0:bb348c97df44 69 // As a workaround supply a dummy buffer with a size of 1.
lypinator 0:bb348c97df44 70 char dummy_buf[1];
lypinator 0:bb348c97df44 71 int len = vsnprintf(dummy_buf, sizeof(dummy_buf), format, arg);
lypinator 0:bb348c97df44 72 if (len < STRING_STACK_LIMIT) {
lypinator 0:bb348c97df44 73 char temp[STRING_STACK_LIMIT];
lypinator 0:bb348c97df44 74 vsprintf(temp, format, arg);
lypinator 0:bb348c97df44 75 puts(temp);
lypinator 0:bb348c97df44 76 } else {
lypinator 0:bb348c97df44 77 char *temp = new char[len + 1];
lypinator 0:bb348c97df44 78 vsprintf(temp, format, arg);
lypinator 0:bb348c97df44 79 puts(temp);
lypinator 0:bb348c97df44 80 delete[] temp;
lypinator 0:bb348c97df44 81 }
lypinator 0:bb348c97df44 82 va_end(arg);
lypinator 0:bb348c97df44 83 unlock();
lypinator 0:bb348c97df44 84 return len;
lypinator 0:bb348c97df44 85 }
lypinator 0:bb348c97df44 86
lypinator 0:bb348c97df44 87 /** Acquire exclusive access to this serial port
lypinator 0:bb348c97df44 88 */
lypinator 0:bb348c97df44 89 void RawSerial::lock()
lypinator 0:bb348c97df44 90 {
lypinator 0:bb348c97df44 91 // No lock used - external synchronization required
lypinator 0:bb348c97df44 92 }
lypinator 0:bb348c97df44 93
lypinator 0:bb348c97df44 94 /** Release exclusive access to this serial port
lypinator 0:bb348c97df44 95 */
lypinator 0:bb348c97df44 96 void RawSerial::unlock()
lypinator 0:bb348c97df44 97 {
lypinator 0:bb348c97df44 98 // No lock used - external synchronization required
lypinator 0:bb348c97df44 99 }
lypinator 0:bb348c97df44 100
lypinator 0:bb348c97df44 101 } // namespace mbed
lypinator 0:bb348c97df44 102
lypinator 0:bb348c97df44 103 #endif