mbed library sources. Supersedes mbed-src.
Fork of mbed-dev by
Embed:
(wiki syntax)
Show/hide line numbers
BusIn.cpp
00001 /* mbed Microcontroller Library 00002 * Copyright (c) 2006-2013 ARM Limited 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 #include "drivers/BusIn.h" 00017 #include "platform/mbed_assert.h" 00018 00019 namespace mbed { 00020 00021 BusIn::BusIn(PinName p0, PinName p1, PinName p2, PinName p3, PinName p4, PinName p5, PinName p6, PinName p7, PinName p8, PinName p9, PinName p10, PinName p11, PinName p12, PinName p13, PinName p14, PinName p15) { 00022 PinName pins[16] = {p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15}; 00023 00024 // No lock needed in the constructor 00025 _nc_mask = 0; 00026 for (int i=0; i<16; i++) { 00027 _pin[i] = (pins[i] != NC) ? new DigitalIn(pins[i]) : 0; 00028 if (pins[i] != NC) { 00029 _nc_mask |= (1 << i); 00030 } 00031 } 00032 } 00033 00034 BusIn::BusIn(PinName pins[16]) { 00035 // No lock needed in the constructor 00036 _nc_mask = 0; 00037 for (int i=0; i<16; i++) { 00038 _pin[i] = (pins[i] != NC) ? new DigitalIn(pins[i]) : 0; 00039 if (pins[i] != NC) { 00040 _nc_mask |= (1 << i); 00041 } 00042 } 00043 } 00044 00045 BusIn::~BusIn() { 00046 // No lock needed in the destructor 00047 for (int i=0; i<16; i++) { 00048 if (_pin[i] != 0) { 00049 delete _pin[i]; 00050 } 00051 } 00052 } 00053 00054 int BusIn::read() { 00055 int v = 0; 00056 lock(); 00057 for (int i=0; i<16; i++) { 00058 if (_pin[i] != 0) { 00059 v |= _pin[i]->read() << i; 00060 } 00061 } 00062 unlock(); 00063 return v; 00064 } 00065 00066 void BusIn::mode(PinMode pull) { 00067 lock(); 00068 for (int i=0; i<16; i++) { 00069 if (_pin[i] != 0) { 00070 _pin[i]->mode(pull); 00071 } 00072 } 00073 unlock(); 00074 } 00075 00076 void BusIn::lock() { 00077 _mutex.lock(); 00078 } 00079 00080 void BusIn::unlock() { 00081 _mutex.unlock(); 00082 } 00083 00084 BusIn::operator int() { 00085 // Underlying read is thread safe 00086 return read(); 00087 } 00088 00089 DigitalIn& BusIn::operator[] (int index) { 00090 // No lock needed since _pin is not modified outside the constructor 00091 MBED_ASSERT(index >= 0 && index <= 16); 00092 MBED_ASSERT(_pin[index]); 00093 return *_pin[index]; 00094 } 00095 00096 } // namespace mbed
Generated on Tue Jul 12 2022 23:05:48 by 1.7.2