Knight KE / Mbed OS Game_Master

游戏王对战板，目前code还是空的

mbed-os/drivers/RawSerial.cpp@0:9b3d4731edbb, 2018-06-21 (annotated)

Committer:
WFKnight
Date:
Thu Jun 21 13:51:43 2018 +0000
Revision:
0:9b3d4731edbb
UART, RTOS, LED

Who changed what in which revision?

UserRevisionLine numberNew contents of line
WFKnight 0:9b3d4731edbb 1 /* mbed Microcontroller Library
WFKnight 0:9b3d4731edbb 2 * Copyright (c) 2006-2013 ARM Limited
WFKnight 0:9b3d4731edbb 3 *
WFKnight 0:9b3d4731edbb 4 * Licensed under the Apache License, Version 2.0 (the "License");
WFKnight 0:9b3d4731edbb 5 * you may not use this file except in compliance with the License.
WFKnight 0:9b3d4731edbb 6 * You may obtain a copy of the License at
WFKnight 0:9b3d4731edbb 7 *
WFKnight 0:9b3d4731edbb 8 * http://www.apache.org/licenses/LICENSE-2.0
WFKnight 0:9b3d4731edbb 9 *
WFKnight 0:9b3d4731edbb 10 * Unless required by applicable law or agreed to in writing, software
WFKnight 0:9b3d4731edbb 11 * distributed under the License is distributed on an "AS IS" BASIS,
WFKnight 0:9b3d4731edbb 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
WFKnight 0:9b3d4731edbb 13 * See the License for the specific language governing permissions and
WFKnight 0:9b3d4731edbb 14 * limitations under the License.
WFKnight 0:9b3d4731edbb 15 */
WFKnight 0:9b3d4731edbb 16 #include "drivers/RawSerial.h"
WFKnight 0:9b3d4731edbb 17 #include "platform/mbed_wait_api.h"
WFKnight 0:9b3d4731edbb 18 #include <stdio.h>
WFKnight 0:9b3d4731edbb 19 #include <cstdarg>
WFKnight 0:9b3d4731edbb 20
WFKnight 0:9b3d4731edbb 21
WFKnight 0:9b3d4731edbb 22 #if DEVICE_SERIAL
WFKnight 0:9b3d4731edbb 23
WFKnight 0:9b3d4731edbb 24 #define STRING_STACK_LIMIT 120
WFKnight 0:9b3d4731edbb 25
WFKnight 0:9b3d4731edbb 26 namespace mbed {
WFKnight 0:9b3d4731edbb 27
WFKnight 0:9b3d4731edbb 28 RawSerial::RawSerial(PinName tx, PinName rx, int baud) : SerialBase(tx, rx, baud) {
WFKnight 0:9b3d4731edbb 29 // No lock needed in the constructor
WFKnight 0:9b3d4731edbb 30 }
WFKnight 0:9b3d4731edbb 31
WFKnight 0:9b3d4731edbb 32 int RawSerial::getc() {
WFKnight 0:9b3d4731edbb 33 lock();
WFKnight 0:9b3d4731edbb 34 int ret = _base_getc();
WFKnight 0:9b3d4731edbb 35 unlock();
WFKnight 0:9b3d4731edbb 36 return ret;
WFKnight 0:9b3d4731edbb 37 }
WFKnight 0:9b3d4731edbb 38
WFKnight 0:9b3d4731edbb 39 int RawSerial::putc(int c) {
WFKnight 0:9b3d4731edbb 40 lock();
WFKnight 0:9b3d4731edbb 41 int ret = _base_putc(c);
WFKnight 0:9b3d4731edbb 42 unlock();
WFKnight 0:9b3d4731edbb 43 return ret;
WFKnight 0:9b3d4731edbb 44 }
WFKnight 0:9b3d4731edbb 45
WFKnight 0:9b3d4731edbb 46 int RawSerial::puts(const char *str) {
WFKnight 0:9b3d4731edbb 47 lock();
WFKnight 0:9b3d4731edbb 48 while (*str)
WFKnight 0:9b3d4731edbb 49 putc(*str ++);
WFKnight 0:9b3d4731edbb 50 unlock();
WFKnight 0:9b3d4731edbb 51 return 0;
WFKnight 0:9b3d4731edbb 52 }
WFKnight 0:9b3d4731edbb 53
WFKnight 0:9b3d4731edbb 54 // Experimental support for printf in RawSerial. No Stream inheritance
WFKnight 0:9b3d4731edbb 55 // means we can't call printf() directly, so we use sprintf() instead.
WFKnight 0:9b3d4731edbb 56 // We only call malloc() for the sprintf() buffer if the buffer
WFKnight 0:9b3d4731edbb 57 // length is above a certain threshold, otherwise we use just the stack.
WFKnight 0:9b3d4731edbb 58 int RawSerial::printf(const char *format, ...) {
WFKnight 0:9b3d4731edbb 59 lock();
WFKnight 0:9b3d4731edbb 60 std::va_list arg;
WFKnight 0:9b3d4731edbb 61 va_start(arg, format);
WFKnight 0:9b3d4731edbb 62 // ARMCC microlib does not properly handle a size of 0.
WFKnight 0:9b3d4731edbb 63 // As a workaround supply a dummy buffer with a size of 1.
WFKnight 0:9b3d4731edbb 64 char dummy_buf[1];
WFKnight 0:9b3d4731edbb 65 int len = vsnprintf(dummy_buf, sizeof(dummy_buf), format, arg);
WFKnight 0:9b3d4731edbb 66 if (len < STRING_STACK_LIMIT) {
WFKnight 0:9b3d4731edbb 67 char temp[STRING_STACK_LIMIT];
WFKnight 0:9b3d4731edbb 68 vsprintf(temp, format, arg);
WFKnight 0:9b3d4731edbb 69 puts(temp);
WFKnight 0:9b3d4731edbb 70 } else {
WFKnight 0:9b3d4731edbb 71 char *temp = new char[len + 1];
WFKnight 0:9b3d4731edbb 72 vsprintf(temp, format, arg);
WFKnight 0:9b3d4731edbb 73 puts(temp);
WFKnight 0:9b3d4731edbb 74 delete[] temp;
WFKnight 0:9b3d4731edbb 75 }
WFKnight 0:9b3d4731edbb 76 va_end(arg);
WFKnight 0:9b3d4731edbb 77 unlock();
WFKnight 0:9b3d4731edbb 78 return len;
WFKnight 0:9b3d4731edbb 79 }
WFKnight 0:9b3d4731edbb 80
WFKnight 0:9b3d4731edbb 81 /** Acquire exclusive access to this serial port
WFKnight 0:9b3d4731edbb 82 */
WFKnight 0:9b3d4731edbb 83 void RawSerial::lock() {
WFKnight 0:9b3d4731edbb 84 // No lock used - external synchronization required
WFKnight 0:9b3d4731edbb 85 }
WFKnight 0:9b3d4731edbb 86
WFKnight 0:9b3d4731edbb 87 /** Release exclusive access to this serial port
WFKnight 0:9b3d4731edbb 88 */
WFKnight 0:9b3d4731edbb 89 void RawSerial::unlock() {
WFKnight 0:9b3d4731edbb 90 // No lock used - external synchronization required
WFKnight 0:9b3d4731edbb 91 }
WFKnight 0:9b3d4731edbb 92
WFKnight 0:9b3d4731edbb 93 } // namespace mbed
WFKnight 0:9b3d4731edbb 94
WFKnight 0:9b3d4731edbb 95 #endif