Petter Bellander / Mbed 2 deprecated Saab-BT

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Dependencies:   mbed

RN52.cpp@7:2df2c6e8c0df, 2016-01-14 (annotated)

Committer:
petter
Date:
Thu Jan 14 22:20:38 2016 +0000
Revision:
7:2df2c6e8c0df
Parent:
6:c454f88524d6
Child:
8:beb6c399490a
Improved handling of RN52 track metadata

Who changed what in which revision?

UserRevisionLine numberNew contents of line
petter 0:6cf6e566c0da 1 #include "RN52.h"
petter 0:6cf6e566c0da 2 #include "mbed.h"
petter 0:6cf6e566c0da 3
petter 0:6cf6e566c0da 4 // RN52 action command definitions
petter 0:6cf6e566c0da 5 #define PLAYPAUSE "AP\r"
petter 0:6cf6e566c0da 6 #define NEXTTRACK "AT+\r"
petter 0:6cf6e566c0da 7 #define PREVTRACK "AT-\r"
petter 0:6cf6e566c0da 8 #define CONNECT "B\r"
petter 0:6cf6e566c0da 9 #define DISCONNECT "@,1\r"
petter 0:6cf6e566c0da 10 #define REBOOT "R,1\r"
petter 0:6cf6e566c0da 11 #define VOLUMEUP "AV+\r"
petter 0:6cf6e566c0da 12 #define MAXVOLUME "SS,0F\r"
petter 0:6cf6e566c0da 13 #define GETSTATUS "Q\r"
petter 0:6cf6e566c0da 14 #define ASSISTANT "P\r"
petter 0:6cf6e566c0da 15 #define CALLER_ID "T\r"
petter 0:6cf6e566c0da 16 #define TRACK_METADATA "AD\r"
petter 0:6cf6e566c0da 17
petter 0:6cf6e566c0da 18
petter 0:6cf6e566c0da 19 Serial serial(p13, p14); // tx, rx
petter 0:6cf6e566c0da 20 DigitalIn event_pin(p20);
petter 0:6cf6e566c0da 21
petter 0:6cf6e566c0da 22 void RN52::init(){
petter 0:6cf6e566c0da 23 serial.baud(115200);
petter 0:6cf6e566c0da 24 printf("Serial baudrate set\r\n");
petter 6:c454f88524d6 25
petter 6:c454f88524d6 26 //make sure event pin is pulled low
petter 6:c454f88524d6 27 if(event_pin == 0) {
petter 6:c454f88524d6 28 char response[10];
petter 6:c454f88524d6 29 serial.printf(GETSTATUS);
petter 6:c454f88524d6 30 capture_response(response);
petter 6:c454f88524d6 31 }
petter 0:6cf6e566c0da 32 }
petter 0:6cf6e566c0da 33
petter 5:8e468fef2754 34 bool RN52::check_event(RN52_RESULT * result){
petter 6:c454f88524d6 35 clear_serial();
petter 6:c454f88524d6 36 if(event_pin == 0) {
petter 7:2df2c6e8c0df 37 clear_result(result);
petter 5:8e468fef2754 38 get(RN52_GETSTATUS, result);
petter 5:8e468fef2754 39 switch (result->event) {
petter 4:3041a571b7a7 40 case RN52_CALLER_ID_EVENT:
petter 5:8e468fef2754 41 get(RN52_CALLER_ID, result);
petter 4:3041a571b7a7 42 break;
petter 4:3041a571b7a7 43 case RN52_TRACK_CHANGE_EVENT:
petter 5:8e468fef2754 44 get(RN52_TRACK_METADATA, result);
petter 4:3041a571b7a7 45 break;
petter 4:3041a571b7a7 46 }
petter 4:3041a571b7a7 47 return 1;
petter 0:6cf6e566c0da 48 }
petter 0:6cf6e566c0da 49 return 0;
petter 0:6cf6e566c0da 50 }
petter 0:6cf6e566c0da 51
petter 5:8e468fef2754 52 bool RN52::connect(){
petter 6:c454f88524d6 53 char response[5];
petter 5:8e468fef2754 54 serial.printf(CONNECT);
petter 5:8e468fef2754 55 return capture_response(response);
petter 5:8e468fef2754 56 }
petter 0:6cf6e566c0da 57
petter 5:8e468fef2754 58 bool RN52::disconnect(){
petter 6:c454f88524d6 59 char response[5];
petter 5:8e468fef2754 60 serial.printf(DISCONNECT);
petter 5:8e468fef2754 61 return capture_response(response);
petter 5:8e468fef2754 62 }
petter 5:8e468fef2754 63
petter 5:8e468fef2754 64 bool RN52::next_track(){
petter 6:c454f88524d6 65 char response[5];
petter 5:8e468fef2754 66 serial.printf(NEXTTRACK);
petter 5:8e468fef2754 67 return capture_response(response);
petter 5:8e468fef2754 68 }
petter 5:8e468fef2754 69
petter 5:8e468fef2754 70 bool RN52::prev_track(){
petter 6:c454f88524d6 71 char response[5];
petter 5:8e468fef2754 72 serial.printf(PREVTRACK);
petter 5:8e468fef2754 73 return capture_response(response);
petter 5:8e468fef2754 74 }
petter 5:8e468fef2754 75
petter 5:8e468fef2754 76 bool RN52::toggle_play(){
petter 6:c454f88524d6 77 char response[5];
petter 5:8e468fef2754 78 serial.printf(PLAYPAUSE);
petter 5:8e468fef2754 79 return capture_response(response);
petter 5:8e468fef2754 80 }
petter 5:8e468fef2754 81
petter 5:8e468fef2754 82 bool RN52::maxvolume(){
petter 6:c454f88524d6 83 char response[5];
petter 6:c454f88524d6 84 serial.printf(MAXVOLUME);
petter 5:8e468fef2754 85 return capture_response(response);
petter 0:6cf6e566c0da 86 }
petter 0:6cf6e566c0da 87
petter 0:6cf6e566c0da 88 bool RN52::get(RN52_COMMAND cmd, RN52_RESULT * result){
petter 0:6cf6e566c0da 89 switch (cmd) {
petter 4:3041a571b7a7 90 case RN52_GETSTATUS: {
petter 0:6cf6e566c0da 91 serial.printf(GETSTATUS);
petter 0:6cf6e566c0da 92 capture_response(result->response);
petter 2:10c60edc8573 93 int response_value = strtoul(result->response, NULL, 16);
petter 2:10c60edc8573 94 result->media_connected = (response_value & (1 << 10)) >> 10; //byte 0, bit 2
petter 2:10c60edc8573 95 result->phone_connected = (response_value & (1 << 11)) >> 11; //byte 0, bit 3
petter 2:10c60edc8573 96 result->connection = (RN52_CONNECTION)(response_value & 0x0F); //byte 1, bits 0-3
petter 4:3041a571b7a7 97 switch (response_value & 0x3000) {
petter 4:3041a571b7a7 98 case 0x1000: //byte 0, bit 4
petter 4:3041a571b7a7 99 result->event = RN52_CALLER_ID_EVENT;
petter 4:3041a571b7a7 100 break;
petter 4:3041a571b7a7 101 case 0x2000: //byte 0, bit 5
petter 4:3041a571b7a7 102 result->event = RN52_TRACK_CHANGE_EVENT;
petter 4:3041a571b7a7 103 break;
petter 4:3041a571b7a7 104 default:
petter 7:2df2c6e8c0df 105 result->event = RN52_OTHER_EVENT;
petter 4:3041a571b7a7 106 break;
petter 0:6cf6e566c0da 107 }
petter 0:6cf6e566c0da 108 break;
petter 4:3041a571b7a7 109 } //added to create local scope of response_value
petter 0:6cf6e566c0da 110 case RN52_CALLER_ID:
petter 0:6cf6e566c0da 111 serial.printf(CALLER_ID);
petter 0:6cf6e566c0da 112 capture_response(result->response);
petter 0:6cf6e566c0da 113 //parse the response
petter 0:6cf6e566c0da 114 break;
petter 0:6cf6e566c0da 115 case RN52_TRACK_METADATA:
petter 6:c454f88524d6 116 serial.printf(TRACK_METADATA);
petter 6:c454f88524d6 117 if(capture_response(result->response)) {//AOK
petter 6:c454f88524d6 118 while(result->response[4] != '(') { //time(ms) - always the last one
petter 6:c454f88524d6 119 capture_response(result->response);
petter 6:c454f88524d6 120 switch (result->response[3]) {
petter 6:c454f88524d6 121 case 'l': //Title
petter 7:2df2c6e8c0df 122 copy_response(result->response, result->title, 6);
petter 6:c454f88524d6 123 break;
petter 6:c454f88524d6 124 case 'i': //Artist
petter 7:2df2c6e8c0df 125 copy_response(result->response, result->artist, 7);
petter 6:c454f88524d6 126 break;
petter 6:c454f88524d6 127 case 'u': //Album
petter 7:2df2c6e8c0df 128 copy_response(result->response, result->album, 6);
petter 7:2df2c6e8c0df 129 break;
petter 6:c454f88524d6 130 case 'r': //Genre
petter 7:2df2c6e8c0df 131 copy_response(result->response, result->genre, 6);
petter 6:c454f88524d6 132 break;
petter 6:c454f88524d6 133 case 'c': //TrackNumber or TrackCount
petter 6:c454f88524d6 134 {
petter 6:c454f88524d6 135 char number_string[5];
petter 6:c454f88524d6 136 if(result->response[5] == 'N') { //TrackNumber
petter 7:2df2c6e8c0df 137 copy_response(result->response, number_string, 12);
petter 6:c454f88524d6 138 result->track_number = strtoul(number_string, NULL, 10);
petter 6:c454f88524d6 139 }
petter 6:c454f88524d6 140 else { //TrackCount
petter 7:2df2c6e8c0df 141 copy_response(result->response, number_string, 11);
petter 6:c454f88524d6 142 result->track_count = strtoul(number_string, NULL, 10);
petter 6:c454f88524d6 143 }
petter 6:c454f88524d6 144 }
petter 6:c454f88524d6 145 break;
petter 6:c454f88524d6 146 case 'e':
petter 6:c454f88524d6 147 {
petter 7:2df2c6e8c0df 148 char duration_string[10];
petter 7:2df2c6e8c0df 149 copy_response(result->response, duration_string, 9);
petter 6:c454f88524d6 150 result->duration = strtoul(duration_string, NULL, 10);
petter 6:c454f88524d6 151 }
petter 6:c454f88524d6 152 break;
petter 6:c454f88524d6 153 }
petter 6:c454f88524d6 154 }
petter 6:c454f88524d6 155 clear_serial();
petter 6:c454f88524d6 156 }
petter 6:c454f88524d6 157 break;
petter 0:6cf6e566c0da 158 default:
petter 0:6cf6e566c0da 159 return 0;
petter 0:6cf6e566c0da 160 }
petter 0:6cf6e566c0da 161 return 1;
petter 0:6cf6e566c0da 162 }
petter 0:6cf6e566c0da 163
petter 0:6cf6e566c0da 164
petter 5:8e468fef2754 165 bool RN52::capture_response(char * str){
petter 0:6cf6e566c0da 166 char c = ' ';
petter 0:6cf6e566c0da 167 char n = 0;
petter 0:6cf6e566c0da 168 while(c != '\n') {
petter 0:6cf6e566c0da 169 if(serial.readable()) {
petter 0:6cf6e566c0da 170 c = serial.getc();
petter 0:6cf6e566c0da 171 str[n] = c;
petter 0:6cf6e566c0da 172 n++;
petter 0:6cf6e566c0da 173 }
petter 0:6cf6e566c0da 174 }
petter 7:2df2c6e8c0df 175 str[n-2] = '\0'; //terminate string before \r\n
petter 5:8e468fef2754 176 return (str[0] == 'A');
petter 6:c454f88524d6 177 }
petter 6:c454f88524d6 178
petter 6:c454f88524d6 179 void RN52::clear_serial(){
petter 6:c454f88524d6 180 while(serial.readable()) {
petter 6:c454f88524d6 181 serial.getc();
petter 6:c454f88524d6 182 }
petter 7:2df2c6e8c0df 183 }
petter 7:2df2c6e8c0df 184
petter 7:2df2c6e8c0df 185 void RN52::copy_response(char * source, char * destination, char offset){
petter 7:2df2c6e8c0df 186 int n = 0;
petter 7:2df2c6e8c0df 187 while(source[n+offset+1] != '\0') { //remove carraige return in the end
petter 7:2df2c6e8c0df 188 destination[n] = source[n+offset];
petter 7:2df2c6e8c0df 189 n++;
petter 7:2df2c6e8c0df 190 }
petter 7:2df2c6e8c0df 191 destination[n] = '\0'; //end string where carriage was
petter 7:2df2c6e8c0df 192 }
petter 7:2df2c6e8c0df 193
petter 7:2df2c6e8c0df 194 void RN52::clear_result(RN52_RESULT * result) {
petter 7:2df2c6e8c0df 195 result->event = RN52_NO_EVENT;
petter 7:2df2c6e8c0df 196 result->media_connected = 0;
petter 7:2df2c6e8c0df 197 result->phone_connected = 0;
petter 7:2df2c6e8c0df 198 result->connection = RN52_LIMBO;
petter 7:2df2c6e8c0df 199 result->title[0] = '\0';
petter 7:2df2c6e8c0df 200 result->artist[0] = '\0';
petter 7:2df2c6e8c0df 201 result->album[0] = '\0';
petter 7:2df2c6e8c0df 202 result->genre[0] = '\0';
petter 7:2df2c6e8c0df 203 result->duration = 0;
petter 7:2df2c6e8c0df 204 result->track_number = 0;
petter 7:2df2c6e8c0df 205 result->track_count = 0;
petter 7:2df2c6e8c0df 206 result->response[0] = '\0';
petter 0:6cf6e566c0da 207 }