The iPod controller that I submitted for the mbed challenge
Dependencies: mbed Motordriver PID
ipodcontrol.cpp@0:371773dd3dd1, 2011-05-04 (annotated)
- Committer:
- networker
- Date:
- Wed May 04 15:41:13 2011 +0000
- Revision:
- 0:371773dd3dd1
first publication
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
networker | 0:371773dd3dd1 | 1 | #include "mbed.h" |
networker | 0:371773dd3dd1 | 2 | #include "ipodcontrol.h" |
networker | 0:371773dd3dd1 | 3 | |
networker | 0:371773dd3dd1 | 4 | char* strdup(const char *s) { |
networker | 0:371773dd3dd1 | 5 | char *r = new char[strlen(s)+1]; |
networker | 0:371773dd3dd1 | 6 | strcpy(r, s); |
networker | 0:371773dd3dd1 | 7 | return r; |
networker | 0:371773dd3dd1 | 8 | } |
networker | 0:371773dd3dd1 | 9 | |
networker | 0:371773dd3dd1 | 10 | /* There are 6 different paths through the ipod menu structure, they all start at the toplevel and end at the song level. |
networker | 0:371773dd3dd1 | 11 | The longest path has 5 levels and each type has a variable number of entries, except the toplevel which has always 6 entries (paths). |
networker | 0:371773dd3dd1 | 12 | When going down the hierarchy, each type starts at entry 0 (the top of the item list). |
networker | 0:371773dd3dd1 | 13 | When going up the hierarchy, each type starts at the entry it was at when going down, this is remembered in array 'last'. |
networker | 0:371773dd3dd1 | 14 | */ |
networker | 0:371773dd3dd1 | 15 | //enum types { top, playlist, artist, album, genre, song, composer, podcast}; |
networker | 0:371773dd3dd1 | 16 | const char *ipodControl::toplevel[] = {"Playlist","Artist","Album","Genre","Song","Composer"};//do not change order! |
networker | 0:371773dd3dd1 | 17 | const types ipodControl::paths[][maxdepth] = { |
networker | 0:371773dd3dd1 | 18 | {top,playlist,song}, |
networker | 0:371773dd3dd1 | 19 | {top,artist,album,song}, |
networker | 0:371773dd3dd1 | 20 | {top,album,song}, |
networker | 0:371773dd3dd1 | 21 | {top,genre,artist,album,song},//path with the maximum depth |
networker | 0:371773dd3dd1 | 22 | {top,song}, |
networker | 0:371773dd3dd1 | 23 | {top,composer,album,song} |
networker | 0:371773dd3dd1 | 24 | }; |
networker | 0:371773dd3dd1 | 25 | |
networker | 0:371773dd3dd1 | 26 | ipodControl::ipodControl(ipod& p): pod(p) { |
networker | 0:371773dd3dd1 | 27 | mode = nav; |
networker | 0:371773dd3dd1 | 28 | path = 0; |
networker | 0:371773dd3dd1 | 29 | level = 0; |
networker | 0:371773dd3dd1 | 30 | items = sizeof(toplevel)/sizeof(char*); |
networker | 0:371773dd3dd1 | 31 | current = 0; |
networker | 0:371773dd3dd1 | 32 | OnGetNames = 0; |
networker | 0:371773dd3dd1 | 33 | OnTrackChange = 0; |
networker | 0:371773dd3dd1 | 34 | OnTime = 0; |
networker | 0:371773dd3dd1 | 35 | OnTitle = 0; |
networker | 0:371773dd3dd1 | 36 | OnAlbum = 0; |
networker | 0:371773dd3dd1 | 37 | OnArtist = 0; |
networker | 0:371773dd3dd1 | 38 | OnStatus = 0; |
networker | 0:371773dd3dd1 | 39 | OnError = 0; |
networker | 0:371773dd3dd1 | 40 | wrap = false; |
networker | 0:371773dd3dd1 | 41 | pod.SetMode(4); |
networker | 0:371773dd3dd1 | 42 | } |
networker | 0:371773dd3dd1 | 43 | |
networker | 0:371773dd3dd1 | 44 | bool ipodControl::readName() { |
networker | 0:371773dd3dd1 | 45 | name = 0; |
networker | 0:371773dd3dd1 | 46 | pod.SendAirCmd(get_ipod_name); |
networker | 0:371773dd3dd1 | 47 | if (pod.waitForReply()) |
networker | 0:371773dd3dd1 | 48 | pod.release(); |
networker | 0:371773dd3dd1 | 49 | if (pod.getError()) { |
networker | 0:371773dd3dd1 | 50 | if (OnError) |
networker | 0:371773dd3dd1 | 51 | OnError(pod.getError(), get_ipod_name); |
networker | 0:371773dd3dd1 | 52 | return false; |
networker | 0:371773dd3dd1 | 53 | } |
networker | 0:371773dd3dd1 | 54 | return true; |
networker | 0:371773dd3dd1 | 55 | } |
networker | 0:371773dd3dd1 | 56 | |
networker | 0:371773dd3dd1 | 57 | //the menu structure currently has no <All> items |
networker | 0:371773dd3dd1 | 58 | void ipodControl::OK(unsigned item) {//when the user presses 'OK' (rotary encoder), we move down the menu hierarchy until we reach the 'song' level, we then switch to playback mode |
networker | 0:371773dd3dd1 | 59 | if (mode == nav) { |
networker | 0:371773dd3dd1 | 60 | if (paths[path][level] != song) { //present level is not yet 'song' |
networker | 0:371773dd3dd1 | 61 | last[level] = item; //push the current position |
networker | 0:371773dd3dd1 | 62 | if (level>0) //not at the toplevel |
networker | 0:371773dd3dd1 | 63 | pod.SendAirCmd(select, paths[path][level], item); //'select' the current item |
networker | 0:371773dd3dd1 | 64 | level++; |
networker | 0:371773dd3dd1 | 65 | current = 0; //start at beginning (no forward history) |
networker | 0:371773dd3dd1 | 66 | pod.SendAirCmd(get_count, paths[path][level]); //get the number of subitems |
networker | 0:371773dd3dd1 | 67 | pod.waitForReply(); |
networker | 0:371773dd3dd1 | 68 | items = pod.Arg1(); |
networker | 0:371773dd3dd1 | 69 | pod.release(); |
networker | 0:371773dd3dd1 | 70 | if (items>0) |
networker | 0:371773dd3dd1 | 71 | pod.SendAirCmd(get_names, paths[path][level],0U,1U); //display the first subitem |
networker | 0:371773dd3dd1 | 72 | printf("new level: %s\n", toplevel[paths[path][level]-1]); //diag. display the new level category |
networker | 0:371773dd3dd1 | 73 | } else { //pressed OK at song level |
networker | 0:371773dd3dd1 | 74 | mode = playback; |
networker | 0:371773dd3dd1 | 75 | pod.SendAirCmd(select, paths[path][level], item); //'select' the current item |
networker | 0:371773dd3dd1 | 76 | pod.SendAirCmd(play_list, item); //execute the current item, start playing |
networker | 0:371773dd3dd1 | 77 | Update(); |
networker | 0:371773dd3dd1 | 78 | } |
networker | 0:371773dd3dd1 | 79 | } else //mode>=play |
networker | 0:371773dd3dd1 | 80 | { //real ipod will cycle through volume, position(elapsed), cover_art and stars |
networker | 0:371773dd3dd1 | 81 | } |
networker | 0:371773dd3dd1 | 82 | } |
networker | 0:371773dd3dd1 | 83 | |
networker | 0:371773dd3dd1 | 84 | void ipodControl::Menu() {//when the user presses 'menu' we move up the menu structure, we enter navigation mode but playback(if active) continues |
networker | 0:371773dd3dd1 | 85 | if (mode != nav) { |
networker | 0:371773dd3dd1 | 86 | mode = nav; |
networker | 0:371773dd3dd1 | 87 | return; |
networker | 0:371773dd3dd1 | 88 | } |
networker | 0:371773dd3dd1 | 89 | if (level > 0) { |
networker | 0:371773dd3dd1 | 90 | level--; |
networker | 0:371773dd3dd1 | 91 | if (level > 0) { //still not at top level |
networker | 0:371773dd3dd1 | 92 | pod.SendAirCmd(get_count, paths[path][level]); //get number of items at new level |
networker | 0:371773dd3dd1 | 93 | pod.waitForReply(); |
networker | 0:371773dd3dd1 | 94 | items = pod.Arg1(); |
networker | 0:371773dd3dd1 | 95 | pod.release(); |
networker | 0:371773dd3dd1 | 96 | if (items>0) { |
networker | 0:371773dd3dd1 | 97 | pod.SendAirCmd(get_names, paths[path][level],last[level],1U); //display the item at the pushed position, or... |
networker | 0:371773dd3dd1 | 98 | current = last[level];//pop the last position |
networker | 0:371773dd3dd1 | 99 | } else { |
networker | 0:371773dd3dd1 | 100 | current = 0; |
networker | 0:371773dd3dd1 | 101 | } |
networker | 0:371773dd3dd1 | 102 | printf("new level: %s\n", toplevel[paths[path][level]-1]); //diag. display the new level category |
networker | 0:371773dd3dd1 | 103 | } else { //reached toplevel |
networker | 0:371773dd3dd1 | 104 | items = sizeof(toplevel)/sizeof(char*); |
networker | 0:371773dd3dd1 | 105 | current = path; |
networker | 0:371773dd3dd1 | 106 | printf("new level: Music\n"); //diag. display the new level category |
networker | 0:371773dd3dd1 | 107 | pod.SendAirCmd(select, 1U); //'select' all (entire iPod) |
networker | 0:371773dd3dd1 | 108 | //pod.SendAirCmd(switch_to_main); //switch to main library |
networker | 0:371773dd3dd1 | 109 | } |
networker | 0:371773dd3dd1 | 110 | } |
networker | 0:371773dd3dd1 | 111 | //else was already at top => do nothing |
networker | 0:371773dd3dd1 | 112 | } |
networker | 0:371773dd3dd1 | 113 | |
networker | 0:371773dd3dd1 | 114 | void ipodControl::Right() { |
networker | 0:371773dd3dd1 | 115 | if (mode == nav) { |
networker | 0:371773dd3dd1 | 116 | Next(); |
networker | 0:371773dd3dd1 | 117 | if (paths[path][level] == top) //top level |
networker | 0:371773dd3dd1 | 118 | path = current; |
networker | 0:371773dd3dd1 | 119 | else //get name of item at new position |
networker | 0:371773dd3dd1 | 120 | pod.SendAirCmd(get_names, paths[path][level],current,1U); |
networker | 0:371773dd3dd1 | 121 | } else |
networker | 0:371773dd3dd1 | 122 | pod.SendAirCmd(command, next);//skip fwd |
networker | 0:371773dd3dd1 | 123 | } |
networker | 0:371773dd3dd1 | 124 | |
networker | 0:371773dd3dd1 | 125 | void ipodControl::Left() { |
networker | 0:371773dd3dd1 | 126 | if (mode == nav) { |
networker | 0:371773dd3dd1 | 127 | Prev(); |
networker | 0:371773dd3dd1 | 128 | if (paths[path][level] == top) { //top level |
networker | 0:371773dd3dd1 | 129 | path = current; |
networker | 0:371773dd3dd1 | 130 | } else {//get name of item at new position |
networker | 0:371773dd3dd1 | 131 | pod.SendAirCmd(get_names, paths[path][level],current,1U); |
networker | 0:371773dd3dd1 | 132 | } |
networker | 0:371773dd3dd1 | 133 | } else |
networker | 0:371773dd3dd1 | 134 | pod.SendAirCmd(command, prev);//skip back |
networker | 0:371773dd3dd1 | 135 | } |
networker | 0:371773dd3dd1 | 136 | |
networker | 0:371773dd3dd1 | 137 | void ipodControl::MoveTo(float pos) { |
networker | 0:371773dd3dd1 | 138 | newpos = pos; |
networker | 0:371773dd3dd1 | 139 | switch (mode) { |
networker | 0:371773dd3dd1 | 140 | case playback: |
networker | 0:371773dd3dd1 | 141 | if (pos < elapsed) { //reverse |
networker | 0:371773dd3dd1 | 142 | //newpos = pos; |
networker | 0:371773dd3dd1 | 143 | mode = fastr; |
networker | 0:371773dd3dd1 | 144 | printf("moving back to %f sec\n", 0.001*pos); |
networker | 0:371773dd3dd1 | 145 | pod.SendAirCmd(command, frwd);//assume that polling is active and that the command is accepted |
networker | 0:371773dd3dd1 | 146 | } else if (pos > elapsed) { //forward |
networker | 0:371773dd3dd1 | 147 | //newpos = pos; |
networker | 0:371773dd3dd1 | 148 | mode = fastf; |
networker | 0:371773dd3dd1 | 149 | printf("moving fwd to %f sec\n", 0.001*pos); |
networker | 0:371773dd3dd1 | 150 | pod.SendAirCmd(command, ffwd); |
networker | 0:371773dd3dd1 | 151 | } |
networker | 0:371773dd3dd1 | 152 | break; |
networker | 0:371773dd3dd1 | 153 | case fastf: |
networker | 0:371773dd3dd1 | 154 | //newpos = pos; |
networker | 0:371773dd3dd1 | 155 | printf("> moving fwd to %f sec\n", 0.001*pos); |
networker | 0:371773dd3dd1 | 156 | break; |
networker | 0:371773dd3dd1 | 157 | case fastr: |
networker | 0:371773dd3dd1 | 158 | //newpos = pos; |
networker | 0:371773dd3dd1 | 159 | printf("< moving back to %f sec\n", 0.001*pos); |
networker | 0:371773dd3dd1 | 160 | break; |
networker | 0:371773dd3dd1 | 161 | case nav: |
networker | 0:371773dd3dd1 | 162 | printf("N"); |
networker | 0:371773dd3dd1 | 163 | break; |
networker | 0:371773dd3dd1 | 164 | } |
networker | 0:371773dd3dd1 | 165 | } |
networker | 0:371773dd3dd1 | 166 | |
networker | 0:371773dd3dd1 | 167 | void ipodControl::poll() {//this is called as part of the main event loop |
networker | 0:371773dd3dd1 | 168 | if (pod.ready()) { |
networker | 0:371773dd3dd1 | 169 | pod.parse(); |
networker | 0:371773dd3dd1 | 170 | switch (pod.cmd()-1) { |
networker | 0:371773dd3dd1 | 171 | case get_count: |
networker | 0:371773dd3dd1 | 172 | items = pod.Arg1(); |
networker | 0:371773dd3dd1 | 173 | break; |
networker | 0:371773dd3dd1 | 174 | case get_names: |
networker | 0:371773dd3dd1 | 175 | if (OnGetNames) |
networker | 0:371773dd3dd1 | 176 | OnGetNames(pod.Arg1(), pod.text()); |
networker | 0:371773dd3dd1 | 177 | break; |
networker | 0:371773dd3dd1 | 178 | case get_position: |
networker | 0:371773dd3dd1 | 179 | current = pod.Arg1(); |
networker | 0:371773dd3dd1 | 180 | break; |
networker | 0:371773dd3dd1 | 181 | case polling: |
networker | 0:371773dd3dd1 | 182 | if (pod.Arg1()==1) {//track change |
networker | 0:371773dd3dd1 | 183 | current = pod.Arg2(); |
networker | 0:371773dd3dd1 | 184 | mode = playback; |
networker | 0:371773dd3dd1 | 185 | if (OnTrackChange) |
networker | 0:371773dd3dd1 | 186 | OnTrackChange(current); |
networker | 0:371773dd3dd1 | 187 | } else {//elapsed time |
networker | 0:371773dd3dd1 | 188 | elapsed = pod.Arg2(); |
networker | 0:371773dd3dd1 | 189 | switch (mode) { |
networker | 0:371773dd3dd1 | 190 | case playback: |
networker | 0:371773dd3dd1 | 191 | if (OnTime) |
networker | 0:371773dd3dd1 | 192 | OnTime(elapsed); |
networker | 0:371773dd3dd1 | 193 | break; |
networker | 0:371773dd3dd1 | 194 | case fastf: |
networker | 0:371773dd3dd1 | 195 | printf(" F "); |
networker | 0:371773dd3dd1 | 196 | if (elapsed >= newpos) |
networker | 0:371773dd3dd1 | 197 | mode = stopfast; |
networker | 0:371773dd3dd1 | 198 | break; |
networker | 0:371773dd3dd1 | 199 | case fastr: |
networker | 0:371773dd3dd1 | 200 | printf(" R "); |
networker | 0:371773dd3dd1 | 201 | if (elapsed <= newpos) |
networker | 0:371773dd3dd1 | 202 | mode = stopfast; |
networker | 0:371773dd3dd1 | 203 | break; |
networker | 0:371773dd3dd1 | 204 | case stopfast: |
networker | 0:371773dd3dd1 | 205 | printf(" S "); |
networker | 0:371773dd3dd1 | 206 | if (elapsed >= newpos) |
networker | 0:371773dd3dd1 | 207 | mode = playback; |
networker | 0:371773dd3dd1 | 208 | break; |
networker | 0:371773dd3dd1 | 209 | } |
networker | 0:371773dd3dd1 | 210 | if (mode == stopfast) { |
networker | 0:371773dd3dd1 | 211 | printf("reached position %f sec\n", 0.001*elapsed); |
networker | 0:371773dd3dd1 | 212 | pod.SendAirCmd(command, stopf); |
networker | 0:371773dd3dd1 | 213 | } |
networker | 0:371773dd3dd1 | 214 | } |
networker | 0:371773dd3dd1 | 215 | break; |
networker | 0:371773dd3dd1 | 216 | case get_ipod_name: |
networker | 0:371773dd3dd1 | 217 | if (name) delete[] name; |
networker | 0:371773dd3dd1 | 218 | name = strdup(pod.text()); |
networker | 0:371773dd3dd1 | 219 | break; |
networker | 0:371773dd3dd1 | 220 | case get_title: |
networker | 0:371773dd3dd1 | 221 | if (OnTitle) |
networker | 0:371773dd3dd1 | 222 | OnTitle(pod.text()); |
networker | 0:371773dd3dd1 | 223 | break; |
networker | 0:371773dd3dd1 | 224 | case get_artist: |
networker | 0:371773dd3dd1 | 225 | if (OnArtist) |
networker | 0:371773dd3dd1 | 226 | OnArtist(pod.text()); |
networker | 0:371773dd3dd1 | 227 | break; |
networker | 0:371773dd3dd1 | 228 | case get_album: |
networker | 0:371773dd3dd1 | 229 | if (OnAlbum) |
networker | 0:371773dd3dd1 | 230 | OnAlbum(pod.text()); |
networker | 0:371773dd3dd1 | 231 | break; |
networker | 0:371773dd3dd1 | 232 | case get_time_status: //arg1=tracklength in ms, arg2=elapsed time, arg3=status (0=stop, 1=play, 2=pause) |
networker | 0:371773dd3dd1 | 233 | tracklength = pod.Arg1(); |
networker | 0:371773dd3dd1 | 234 | elapsed = pod.Arg2(); |
networker | 0:371773dd3dd1 | 235 | status = pod.Arg3(); |
networker | 0:371773dd3dd1 | 236 | if (OnStatus) |
networker | 0:371773dd3dd1 | 237 | OnStatus(tracklength, elapsed, pod.Arg3()); |
networker | 0:371773dd3dd1 | 238 | break; |
networker | 0:371773dd3dd1 | 239 | case 0: //ack/error |
networker | 0:371773dd3dd1 | 240 | if (pod.Arg1()>0 && OnError) |
networker | 0:371773dd3dd1 | 241 | OnError(pod.Arg1(), pod.Arg2()); |
networker | 0:371773dd3dd1 | 242 | break; |
networker | 0:371773dd3dd1 | 243 | default: |
networker | 0:371773dd3dd1 | 244 | printf("Unknown reply from iPod %04X\n", pod.cmd()); |
networker | 0:371773dd3dd1 | 245 | break; |
networker | 0:371773dd3dd1 | 246 | } |
networker | 0:371773dd3dd1 | 247 | unsigned reply = pod.cmd(); |
networker | 0:371773dd3dd1 | 248 | pod.release();//reset ready flag and delete the receive buffer, meaning that all returned results should be saved or processed |
networker | 0:371773dd3dd1 | 249 | updater(reply); |
networker | 0:371773dd3dd1 | 250 | } |
networker | 0:371773dd3dd1 | 251 | } |
networker | 0:371773dd3dd1 | 252 | |
networker | 0:371773dd3dd1 | 253 | void ipodControl::updater(unsigned reply) { |
networker | 0:371773dd3dd1 | 254 | if (update_state != usIdle) |
networker | 0:371773dd3dd1 | 255 | printf("\t\tstate=%d, reply = %02X\n", update_state, reply); |
networker | 0:371773dd3dd1 | 256 | switch (update_state) { |
networker | 0:371773dd3dd1 | 257 | case usGet_time_status: |
networker | 0:371773dd3dd1 | 258 | if (reply==get_time_status+1) { |
networker | 0:371773dd3dd1 | 259 | update_state = usGet_title; |
networker | 0:371773dd3dd1 | 260 | pod.SendAirCmd(get_title, current); |
networker | 0:371773dd3dd1 | 261 | printf("updater: getting title\n"); |
networker | 0:371773dd3dd1 | 262 | } else if (reply==polling+1) {//only do this when polling is off |
networker | 0:371773dd3dd1 | 263 | pod.SendAirCmd(get_time_status); //reissue the same command and stay in the same state |
networker | 0:371773dd3dd1 | 264 | printf("updater: getting status (again)\n"); |
networker | 0:371773dd3dd1 | 265 | } |
networker | 0:371773dd3dd1 | 266 | break; |
networker | 0:371773dd3dd1 | 267 | case usGet_title: |
networker | 0:371773dd3dd1 | 268 | if (reply==get_title+1) { |
networker | 0:371773dd3dd1 | 269 | update_state = usGet_artist; |
networker | 0:371773dd3dd1 | 270 | pod.SendAirCmd(get_artist, current); |
networker | 0:371773dd3dd1 | 271 | printf("updater: getting artist\n"); |
networker | 0:371773dd3dd1 | 272 | } |
networker | 0:371773dd3dd1 | 273 | break; |
networker | 0:371773dd3dd1 | 274 | case usGet_artist: |
networker | 0:371773dd3dd1 | 275 | if (reply==get_artist+1) { |
networker | 0:371773dd3dd1 | 276 | update_state = usIdle; |
networker | 0:371773dd3dd1 | 277 | pod.SendAirCmd(polling, 1); |
networker | 0:371773dd3dd1 | 278 | printf("updater: going idle\n"); |
networker | 0:371773dd3dd1 | 279 | } |
networker | 0:371773dd3dd1 | 280 | break; |
networker | 0:371773dd3dd1 | 281 | } |
networker | 0:371773dd3dd1 | 282 | } |