mbed library sources. Supersedes mbed-src.
Dependents: Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more
BusInOut.cpp
00001 /* mbed Microcontroller Library 00002 * Copyright (c) 2006-2013 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/BusInOut.h" 00018 #include "platform/mbed_assert.h" 00019 00020 namespace mbed { 00021 00022 BusInOut::BusInOut(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) 00023 { 00024 PinName pins[16] = {p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15}; 00025 00026 // No lock needed in the constructor 00027 _nc_mask = 0; 00028 for (int i = 0; i < 16; i++) { 00029 _pin[i] = (pins[i] != NC) ? new DigitalInOut(pins[i]) : 0; 00030 if (pins[i] != NC) { 00031 _nc_mask |= (1 << i); 00032 } 00033 } 00034 } 00035 00036 BusInOut::BusInOut(PinName pins[16]) 00037 { 00038 // No lock needed in the constructor 00039 _nc_mask = 0; 00040 for (int i = 0; i < 16; i++) { 00041 _pin[i] = (pins[i] != NC) ? new DigitalInOut(pins[i]) : 0; 00042 if (pins[i] != NC) { 00043 _nc_mask |= (1 << i); 00044 } 00045 } 00046 } 00047 00048 BusInOut::~BusInOut() 00049 { 00050 // No lock needed in the destructor 00051 for (int i = 0; i < 16; i++) { 00052 if (_pin[i] != 0) { 00053 delete _pin[i]; 00054 } 00055 } 00056 } 00057 00058 void BusInOut::write(int value) 00059 { 00060 lock(); 00061 for (int i = 0; i < 16; i++) { 00062 if (_pin[i] != 0) { 00063 _pin[i]->write((value >> i) & 1); 00064 } 00065 } 00066 unlock(); 00067 } 00068 00069 int BusInOut::read() 00070 { 00071 lock(); 00072 int v = 0; 00073 for (int i = 0; i < 16; i++) { 00074 if (_pin[i] != 0) { 00075 v |= _pin[i]->read() << i; 00076 } 00077 } 00078 unlock(); 00079 return v; 00080 } 00081 00082 void BusInOut::output() 00083 { 00084 lock(); 00085 for (int i = 0; i < 16; i++) { 00086 if (_pin[i] != 0) { 00087 _pin[i]->output(); 00088 } 00089 } 00090 unlock(); 00091 } 00092 00093 void BusInOut::input() 00094 { 00095 lock(); 00096 for (int i = 0; i < 16; i++) { 00097 if (_pin[i] != 0) { 00098 _pin[i]->input(); 00099 } 00100 } 00101 unlock(); 00102 } 00103 00104 void BusInOut::mode(PinMode pull) 00105 { 00106 lock(); 00107 for (int i = 0; i < 16; i++) { 00108 if (_pin[i] != 0) { 00109 _pin[i]->mode(pull); 00110 } 00111 } 00112 unlock(); 00113 } 00114 00115 BusInOut &BusInOut::operator= (int v) 00116 { 00117 // Underlying write is thread safe 00118 write(v); 00119 return *this; 00120 } 00121 00122 BusInOut &BusInOut::operator= (BusInOut &rhs) 00123 { 00124 // Underlying read is thread safe 00125 write(rhs.read()); 00126 return *this; 00127 } 00128 00129 DigitalInOut &BusInOut::operator[](int index) 00130 { 00131 // No lock needed since _pin is not modified outside the constructor 00132 MBED_ASSERT(index >= 0 && index < 16); 00133 MBED_ASSERT(_pin[index]); 00134 return *_pin[index]; 00135 } 00136 00137 BusInOut::operator int() 00138 { 00139 // Underlying read is thread safe 00140 return read(); 00141 } 00142 00143 void BusInOut::lock() 00144 { 00145 _mutex.lock(); 00146 } 00147 00148 void BusInOut::unlock() 00149 { 00150 _mutex.unlock(); 00151 } 00152 00153 } // namespace mbed
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