NuMaker RS485 lib
Dependents: NuMaker-mbed-modbus-sample
MyUnbufferedSerial.cpp@6:531888b928d6, 4 months ago (annotated)
- Committer:
- morgandu
- Date:
- Mon May 13 08:51:47 2024 +0000
- Revision:
- 6:531888b928d6
- Parent:
- 4:3bdf456890b6
Add for NuMaker-IoT-M487 board
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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cyliang | 4:3bdf456890b6 | 1 | /* mbed Microcontroller Library |
cyliang | 4:3bdf456890b6 | 2 | * Copyright (c) 2006-2019 ARM Limited |
cyliang | 4:3bdf456890b6 | 3 | * SPDX-License-Identifier: Apache-2.0 |
cyliang | 4:3bdf456890b6 | 4 | * |
cyliang | 4:3bdf456890b6 | 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
cyliang | 4:3bdf456890b6 | 6 | * you may not use this file except in compliance with the License. |
cyliang | 4:3bdf456890b6 | 7 | * You may obtain a copy of the License at |
cyliang | 4:3bdf456890b6 | 8 | * |
cyliang | 4:3bdf456890b6 | 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
cyliang | 4:3bdf456890b6 | 10 | * |
cyliang | 4:3bdf456890b6 | 11 | * Unless required by applicable law or agreed to in writing, software |
cyliang | 4:3bdf456890b6 | 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
cyliang | 4:3bdf456890b6 | 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
cyliang | 4:3bdf456890b6 | 14 | * See the License for the specific language governing permissions and |
cyliang | 4:3bdf456890b6 | 15 | * limitations under the License. |
cyliang | 4:3bdf456890b6 | 16 | */ |
cyliang | 4:3bdf456890b6 | 17 | |
cyliang | 4:3bdf456890b6 | 18 | #include "MyUnbufferedSerial.h" |
cyliang | 4:3bdf456890b6 | 19 | #if (MBED_MAJOR_VERSION >= 6) |
cyliang | 4:3bdf456890b6 | 20 | #if DEVICE_SERIAL |
cyliang | 4:3bdf456890b6 | 21 | |
cyliang | 4:3bdf456890b6 | 22 | #include "platform/mbed_critical.h" |
cyliang | 4:3bdf456890b6 | 23 | |
cyliang | 4:3bdf456890b6 | 24 | namespace mbed { |
cyliang | 4:3bdf456890b6 | 25 | |
cyliang | 4:3bdf456890b6 | 26 | MyUnbufferedSerial::MyUnbufferedSerial( |
cyliang | 4:3bdf456890b6 | 27 | PinName tx, |
cyliang | 4:3bdf456890b6 | 28 | PinName rx, |
cyliang | 4:3bdf456890b6 | 29 | int baud |
cyliang | 4:3bdf456890b6 | 30 | ) : SerialBase(tx, rx, baud) |
cyliang | 4:3bdf456890b6 | 31 | { |
cyliang | 4:3bdf456890b6 | 32 | // No lock needed in the constructor |
cyliang | 4:3bdf456890b6 | 33 | } |
cyliang | 4:3bdf456890b6 | 34 | |
cyliang | 4:3bdf456890b6 | 35 | MyUnbufferedSerial::MyUnbufferedSerial( |
cyliang | 4:3bdf456890b6 | 36 | const serial_pinmap_t &static_pinmap, int baud |
cyliang | 4:3bdf456890b6 | 37 | ) : SerialBase(static_pinmap, baud) |
cyliang | 4:3bdf456890b6 | 38 | { |
cyliang | 4:3bdf456890b6 | 39 | // No lock needed in the constructor |
cyliang | 4:3bdf456890b6 | 40 | } |
cyliang | 4:3bdf456890b6 | 41 | |
cyliang | 4:3bdf456890b6 | 42 | ssize_t MyUnbufferedSerial::write(const void *buffer, size_t size) |
cyliang | 4:3bdf456890b6 | 43 | { |
cyliang | 4:3bdf456890b6 | 44 | const unsigned char *buf = static_cast<const unsigned char *>(buffer); |
cyliang | 4:3bdf456890b6 | 45 | |
cyliang | 4:3bdf456890b6 | 46 | if (size == 0) { |
cyliang | 4:3bdf456890b6 | 47 | return 0; |
cyliang | 4:3bdf456890b6 | 48 | } |
cyliang | 4:3bdf456890b6 | 49 | |
cyliang | 4:3bdf456890b6 | 50 | bool lock_api = !core_util_in_critical_section(); |
cyliang | 4:3bdf456890b6 | 51 | |
cyliang | 4:3bdf456890b6 | 52 | if (lock_api) { |
cyliang | 4:3bdf456890b6 | 53 | lock(); |
cyliang | 4:3bdf456890b6 | 54 | } |
cyliang | 4:3bdf456890b6 | 55 | |
cyliang | 4:3bdf456890b6 | 56 | for (size_t i = 0; i < size; i++) { |
cyliang | 4:3bdf456890b6 | 57 | _base_putc(buf[i]); |
cyliang | 4:3bdf456890b6 | 58 | } |
cyliang | 4:3bdf456890b6 | 59 | |
cyliang | 4:3bdf456890b6 | 60 | if (lock_api) { |
cyliang | 4:3bdf456890b6 | 61 | unlock(); |
cyliang | 4:3bdf456890b6 | 62 | } |
cyliang | 4:3bdf456890b6 | 63 | |
cyliang | 4:3bdf456890b6 | 64 | return size; |
cyliang | 4:3bdf456890b6 | 65 | } |
cyliang | 4:3bdf456890b6 | 66 | |
cyliang | 4:3bdf456890b6 | 67 | ssize_t MyUnbufferedSerial::read(void *buffer, size_t size) |
cyliang | 4:3bdf456890b6 | 68 | { |
cyliang | 4:3bdf456890b6 | 69 | unsigned char *buf = static_cast<unsigned char *>(buffer); |
cyliang | 4:3bdf456890b6 | 70 | |
cyliang | 4:3bdf456890b6 | 71 | if (size == 0) { |
cyliang | 4:3bdf456890b6 | 72 | return 0; |
cyliang | 4:3bdf456890b6 | 73 | } |
cyliang | 4:3bdf456890b6 | 74 | |
cyliang | 4:3bdf456890b6 | 75 | lock(); |
cyliang | 4:3bdf456890b6 | 76 | |
cyliang | 4:3bdf456890b6 | 77 | buf[0] = _base_getc(); |
cyliang | 4:3bdf456890b6 | 78 | |
cyliang | 4:3bdf456890b6 | 79 | unlock(); |
cyliang | 4:3bdf456890b6 | 80 | |
cyliang | 4:3bdf456890b6 | 81 | return 1; |
cyliang | 4:3bdf456890b6 | 82 | } |
cyliang | 4:3bdf456890b6 | 83 | |
cyliang | 4:3bdf456890b6 | 84 | short MyUnbufferedSerial::poll(short events) const |
cyliang | 4:3bdf456890b6 | 85 | { |
cyliang | 4:3bdf456890b6 | 86 | short revents = 0; |
cyliang | 4:3bdf456890b6 | 87 | if ( |
cyliang | 4:3bdf456890b6 | 88 | (events & POLLIN) |
cyliang | 4:3bdf456890b6 | 89 | && (const_cast <MyUnbufferedSerial *>(this))->SerialBase::readable() |
cyliang | 4:3bdf456890b6 | 90 | ) { |
cyliang | 4:3bdf456890b6 | 91 | revents |= POLLIN; |
cyliang | 4:3bdf456890b6 | 92 | } |
cyliang | 4:3bdf456890b6 | 93 | if ( |
cyliang | 4:3bdf456890b6 | 94 | (events & POLLOUT) |
cyliang | 4:3bdf456890b6 | 95 | && (const_cast <MyUnbufferedSerial *>(this))->SerialBase::writeable() |
cyliang | 4:3bdf456890b6 | 96 | ) { |
cyliang | 4:3bdf456890b6 | 97 | revents |= POLLOUT; |
cyliang | 4:3bdf456890b6 | 98 | } |
cyliang | 4:3bdf456890b6 | 99 | return revents; |
cyliang | 4:3bdf456890b6 | 100 | } |
cyliang | 4:3bdf456890b6 | 101 | |
cyliang | 4:3bdf456890b6 | 102 | int MyUnbufferedSerial::enable_input(bool enabled) |
cyliang | 4:3bdf456890b6 | 103 | { |
cyliang | 4:3bdf456890b6 | 104 | SerialBase::enable_input(enabled); |
cyliang | 4:3bdf456890b6 | 105 | |
cyliang | 4:3bdf456890b6 | 106 | return 0; |
cyliang | 4:3bdf456890b6 | 107 | } |
cyliang | 4:3bdf456890b6 | 108 | |
cyliang | 4:3bdf456890b6 | 109 | int MyUnbufferedSerial::enable_output(bool enabled) |
cyliang | 4:3bdf456890b6 | 110 | { |
cyliang | 4:3bdf456890b6 | 111 | SerialBase::enable_output(enabled); |
cyliang | 4:3bdf456890b6 | 112 | |
cyliang | 4:3bdf456890b6 | 113 | return 0; |
cyliang | 4:3bdf456890b6 | 114 | } |
cyliang | 4:3bdf456890b6 | 115 | |
cyliang | 4:3bdf456890b6 | 116 | #if DEVICE_SERIAL_FC |
cyliang | 4:3bdf456890b6 | 117 | void MyUnbufferedSerial::set_flow_control(Flow type, PinName flow1, PinName flow2) |
cyliang | 4:3bdf456890b6 | 118 | { |
cyliang | 4:3bdf456890b6 | 119 | lock(); |
cyliang | 4:3bdf456890b6 | 120 | SerialBase::set_flow_control(type, flow1, flow2); |
cyliang | 4:3bdf456890b6 | 121 | unlock(); |
cyliang | 4:3bdf456890b6 | 122 | } |
cyliang | 4:3bdf456890b6 | 123 | #endif // DEVICE_SERIAL_FC |
cyliang | 4:3bdf456890b6 | 124 | |
cyliang | 4:3bdf456890b6 | 125 | } // namespace mbed |
cyliang | 4:3bdf456890b6 | 126 | |
cyliang | 4:3bdf456890b6 | 127 | #endif // #if DEVICE_SERIAL |
cyliang | 4:3bdf456890b6 | 128 | #endif // (MBED_MAJOR_VERSION >= 6 ) |