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IR_remote_demo_code
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IR_remote
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Armando Casalino
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TransmitterIR.cpp
00001 /** 00002 * IR transmitter (Version 0.0.4) 00003 * 00004 * Copyright (C) 2010 Shinichiro Nakamura (CuBeatSystems) 00005 * http://shinta.main.jp/ 00006 */ 00007 00008 #include "TransmitterIR.h" 00009 00010 #define LOCK() 00011 #define UNLOCK() 00012 00013 /** 00014 * Constructor. 00015 * 00016 * @param txpin Pin for transmit IR signal. 00017 */ 00018 TransmitterIR::TransmitterIR(PinName txpin) : tx(txpin) { 00019 tx.write(0.0); 00020 tx.period_us(26.3); 00021 00022 work.state = Idle; 00023 work.bitcount = 0; 00024 work.leader = 0; 00025 work.data = 0; 00026 work.trailer = 0; 00027 00028 data.format = RemoteIR::UNKNOWN; 00029 data.bitlength = 0; 00030 } 00031 00032 /** 00033 * Destructor. 00034 */ 00035 TransmitterIR::~TransmitterIR() { 00036 } 00037 00038 /** 00039 * Get state. 00040 * 00041 * @return Current state. 00042 */ 00043 TransmitterIR::State TransmitterIR::getState(void) { 00044 LOCK(); 00045 State s = work.state; 00046 UNLOCK(); 00047 return s; 00048 } 00049 00050 /** 00051 * Set data. 00052 * 00053 * @param format Format. 00054 * @param buf Buffer of a data. 00055 * @param bitlength Bit length of the data. 00056 * 00057 * @return Data bit length. 00058 */ 00059 int TransmitterIR::setData(RemoteIR::Format format, uint8_t *buf, int bitlength) { 00060 LOCK(); 00061 if (work.state != Idle) { 00062 UNLOCK(); 00063 return -1; 00064 } 00065 00066 work.state = Leader; 00067 work.bitcount = 0; 00068 work.leader = 0; 00069 work.data = 0; 00070 work.trailer = 0; 00071 00072 data.format = format; 00073 data.bitlength = bitlength; 00074 const int n = bitlength / 8 + (((bitlength % 8) != 0) ? 1 : 0); 00075 for (int i = 0; i < n; i++) { 00076 data.buffer[i] = buf[i]; 00077 } 00078 00079 switch (format) { 00080 case RemoteIR::NEC: 00081 ticker.detach(); 00082 ticker.attach_us(this, &TransmitterIR::tick, RemoteIR::TUS_NEC); 00083 break; 00084 case RemoteIR::AEHA: 00085 ticker.detach(); 00086 ticker.attach_us(this, &TransmitterIR::tick, RemoteIR::TUS_AEHA); 00087 break; 00088 case RemoteIR::SONY: 00089 ticker.detach(); 00090 ticker.attach_us(this, &TransmitterIR::tick, RemoteIR::TUS_SONY); 00091 break; 00092 } 00093 00094 UNLOCK(); 00095 return bitlength; 00096 } 00097 00098 void TransmitterIR::tick(void) { 00099 LOCK(); 00100 switch (work.state) { 00101 case Idle: 00102 work.bitcount = 0; 00103 work.leader = 0; 00104 work.data = 0; 00105 work.trailer = 0; 00106 break; 00107 case Leader: 00108 if (data.format == RemoteIR::NEC) { 00109 /* 00110 * NEC. 00111 */ 00112 static const int LEADER_NEC_HEAD = 16; 00113 static const int LEADER_NEC_TAIL = 8; 00114 if (work.leader < LEADER_NEC_HEAD) { 00115 tx.write(0.5); 00116 } else { 00117 tx.write(0.0); 00118 } 00119 work.leader++; 00120 if ((LEADER_NEC_HEAD + LEADER_NEC_TAIL) <= work.leader) { 00121 work.state = Data; 00122 } 00123 } else if (data.format == RemoteIR::AEHA) { 00124 /* 00125 * AEHA. 00126 */ 00127 static const int LEADER_AEHA_HEAD = 8; 00128 static const int LEADER_AEHA_TAIL = 4; 00129 if (work.leader < LEADER_AEHA_HEAD) { 00130 tx.write(0.5); 00131 } else { 00132 tx.write(0.0); 00133 } 00134 work.leader++; 00135 if ((LEADER_AEHA_HEAD + LEADER_AEHA_TAIL) <= work.leader) { 00136 work.state = Data; 00137 } 00138 } else if (data.format == RemoteIR::SONY) { 00139 /* 00140 * SONY. 00141 */ 00142 static const int LEADER_SONY_HEAD = 4; 00143 static const int LEADER_SONY_TAIL = 0; 00144 if (work.leader < LEADER_SONY_HEAD) { 00145 tx.write(0.5); 00146 } else { 00147 tx.write(0.0); 00148 } 00149 work.leader++; 00150 if ((LEADER_SONY_HEAD + LEADER_SONY_TAIL) <= work.leader) { 00151 work.state = Data; 00152 } 00153 } else { 00154 } 00155 break; 00156 case Data: 00157 if (data.format == RemoteIR::NEC) { 00158 /* 00159 * NEC. 00160 */ 00161 if (work.data == 0) { 00162 tx.write(0.5); 00163 work.data++; 00164 } else { 00165 tx.write(0.0); 00166 if (0 != (data.buffer[work.bitcount / 8] & (1 << work.bitcount % 8))) { 00167 if (3 <= work.data) { 00168 work.bitcount++; 00169 work.data = 0; 00170 } else { 00171 work.data++; 00172 } 00173 } else { 00174 if (1 <= work.data) { 00175 work.bitcount++; 00176 work.data = 0; 00177 } else { 00178 work.data++; 00179 } 00180 } 00181 } 00182 if (data.bitlength <= work.bitcount) { 00183 work.state = Trailer; 00184 } 00185 } else if (data.format == RemoteIR::AEHA) { 00186 /* 00187 * AEHA. 00188 */ 00189 if (work.data == 0) { 00190 tx.write(0.5); 00191 work.data++; 00192 } else { 00193 tx.write(0.0); 00194 if (0 != (data.buffer[work.bitcount / 8] & (1 << work.bitcount % 8))) { 00195 if (3 <= work.data) { 00196 work.bitcount++; 00197 work.data = 0; 00198 } else { 00199 work.data++; 00200 } 00201 } else { 00202 if (1 <= work.data) { 00203 work.bitcount++; 00204 work.data = 0; 00205 } else { 00206 work.data++; 00207 } 00208 } 00209 } 00210 if (data.bitlength <= work.bitcount) { 00211 work.state = Trailer; 00212 } 00213 } else if (data.format == RemoteIR::SONY) { 00214 /* 00215 * SONY. 00216 */ 00217 if (work.data == 0) { 00218 tx.write(0.0); 00219 work.data++; 00220 } else { 00221 tx.write(0.5); 00222 if (0 != (data.buffer[work.bitcount / 8] & (1 << work.bitcount % 8))) { 00223 if (2 <= work.data) { 00224 work.bitcount++; 00225 work.data = 0; 00226 } else { 00227 work.data++; 00228 } 00229 } else { 00230 if (1 <= work.data) { 00231 work.bitcount++; 00232 work.data = 0; 00233 } else { 00234 work.data++; 00235 } 00236 } 00237 } 00238 if (data.bitlength <= work.bitcount) { 00239 work.state = Trailer; 00240 } 00241 } else { 00242 } 00243 break; 00244 case Trailer: 00245 if (data.format == RemoteIR::NEC) { 00246 /* 00247 * NEC. 00248 */ 00249 static const int TRAILER_NEC_HEAD = 1; 00250 static const int TRAILER_NEC_TAIL = 2; 00251 if (work.trailer < TRAILER_NEC_HEAD) { 00252 tx.write(0.5); 00253 } else { 00254 tx.write(0.0); 00255 } 00256 work.trailer++; 00257 if ((TRAILER_NEC_HEAD + TRAILER_NEC_TAIL) <= work.trailer) { 00258 work.state = Idle; 00259 //ticker.detach(); 00260 } 00261 } else if (data.format == RemoteIR::AEHA) { 00262 /* 00263 * AEHA. 00264 */ 00265 static const int TRAILER_AEHA_HEAD = 1; 00266 static const int TRAILER_AEHA_TAIL = 8000 / RemoteIR::TUS_AEHA; 00267 if (work.trailer < TRAILER_AEHA_HEAD) { 00268 tx.write(0.5); 00269 } else { 00270 tx.write(0.0); 00271 } 00272 work.trailer++; 00273 if ((TRAILER_AEHA_HEAD + TRAILER_AEHA_TAIL) <= work.trailer) { 00274 work.state = Idle; 00275 //ticker.detach(); 00276 } 00277 } else if (data.format == RemoteIR::SONY) { 00278 /* 00279 * SONY. 00280 */ 00281 static const int TRAILER_SONY_HEAD = 0; 00282 static const int TRAILER_SONY_TAIL = 0; 00283 if (work.trailer < TRAILER_SONY_HEAD) { 00284 tx.write(0.5); 00285 } else { 00286 tx.write(0.0); 00287 } 00288 work.trailer++; 00289 if ((TRAILER_SONY_HEAD + TRAILER_SONY_TAIL) <= work.trailer) { 00290 work.state = Idle; 00291 //ticker.detach(); 00292 } 00293 } else { 00294 } 00295 break; 00296 default: 00297 break; 00298 } 00299 UNLOCK(); 00300 }
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