Petter Bellander / Mbed 2 deprecated Saab-BT

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Dependencies:   mbed

RN52.cpp@11:74844f6ca8cf, 2016-01-28 (annotated)

Committer:
petter
Date:
Thu Jan 28 21:22:08 2016 +0000
Revision:
11:74844f6ca8cf
Parent:
9:9a4c81493a3d
Child:
13:968af0520530
Added power saving, added RN52 timeout.; Added errors in display and 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 11:74844f6ca8cf 18 #define RESPONSE_TIMEOUT 30 //ms
petter 0:6cf6e566c0da 19
petter 0:6cf6e566c0da 20 Serial serial(p13, p14); // tx, rx
petter 0:6cf6e566c0da 21 DigitalIn event_pin(p20);
petter 11:74844f6ca8cf 22 Timer responsetime;
petter 11:74844f6ca8cf 23 char dummy_response[255];
petter 11:74844f6ca8cf 24
petter 0:6cf6e566c0da 25
petter 0:6cf6e566c0da 26 void RN52::init(){
petter 0:6cf6e566c0da 27 serial.baud(115200);
petter 0:6cf6e566c0da 28 printf("Serial baudrate set\r\n");
petter 6:c454f88524d6 29
petter 6:c454f88524d6 30 //make sure event pin is pulled low
petter 6:c454f88524d6 31 if(event_pin == 0) {
petter 6:c454f88524d6 32 char response[10];
petter 6:c454f88524d6 33 serial.printf(GETSTATUS);
petter 6:c454f88524d6 34 capture_response(response);
petter 6:c454f88524d6 35 }
petter 0:6cf6e566c0da 36 }
petter 0:6cf6e566c0da 37
petter 5:8e468fef2754 38 bool RN52::check_event(RN52_RESULT * result){
petter 6:c454f88524d6 39 clear_serial();
petter 6:c454f88524d6 40 if(event_pin == 0) {
petter 7:2df2c6e8c0df 41 clear_result(result);
petter 8:beb6c399490a 42 get_status(result);
petter 5:8e468fef2754 43 switch (result->event) {
petter 4:3041a571b7a7 44 case RN52_CALLER_ID_EVENT:
petter 8:beb6c399490a 45 get_caller_id(result);
petter 4:3041a571b7a7 46 break;
petter 4:3041a571b7a7 47 case RN52_TRACK_CHANGE_EVENT:
petter 8:beb6c399490a 48 get_track_metadata(result);
petter 4:3041a571b7a7 49 break;
petter 4:3041a571b7a7 50 }
petter 4:3041a571b7a7 51 return 1;
petter 0:6cf6e566c0da 52 }
petter 0:6cf6e566c0da 53 return 0;
petter 0:6cf6e566c0da 54 }
petter 0:6cf6e566c0da 55
petter 5:8e468fef2754 56 bool RN52::connect(){
petter 5:8e468fef2754 57 serial.printf(CONNECT);
petter 11:74844f6ca8cf 58 return capture_response(dummy_response);
petter 5:8e468fef2754 59 }
petter 0:6cf6e566c0da 60
petter 5:8e468fef2754 61 bool RN52::disconnect(){
petter 5:8e468fef2754 62 serial.printf(DISCONNECT);
petter 11:74844f6ca8cf 63 return capture_response(dummy_response);
petter 5:8e468fef2754 64 }
petter 5:8e468fef2754 65
petter 5:8e468fef2754 66 bool RN52::next_track(){
petter 5:8e468fef2754 67 serial.printf(NEXTTRACK);
petter 11:74844f6ca8cf 68 return capture_response(dummy_response);
petter 5:8e468fef2754 69 }
petter 5:8e468fef2754 70
petter 5:8e468fef2754 71 bool RN52::prev_track(){
petter 5:8e468fef2754 72 serial.printf(PREVTRACK);
petter 11:74844f6ca8cf 73 return capture_response(dummy_response);
petter 5:8e468fef2754 74 }
petter 5:8e468fef2754 75
petter 5:8e468fef2754 76 bool RN52::toggle_play(){
petter 5:8e468fef2754 77 serial.printf(PLAYPAUSE);
petter 11:74844f6ca8cf 78 return capture_response(dummy_response);
petter 5:8e468fef2754 79 }
petter 5:8e468fef2754 80
petter 5:8e468fef2754 81 bool RN52::maxvolume(){
petter 6:c454f88524d6 82 serial.printf(MAXVOLUME);
petter 11:74844f6ca8cf 83 return capture_response(dummy_response);
petter 0:6cf6e566c0da 84 }
petter 0:6cf6e566c0da 85
petter 8:beb6c399490a 86 bool RN52::get_status(RN52_RESULT * result){
petter 8:beb6c399490a 87 serial.printf(GETSTATUS);
petter 8:beb6c399490a 88 capture_response(result->response);
petter 8:beb6c399490a 89 int response_value = strtoul(result->response, NULL, 16);
petter 8:beb6c399490a 90 result->media_connected = (response_value & (1 << 10)) >> 10; //byte 0, bit 2
petter 8:beb6c399490a 91 result->phone_connected = (response_value & (1 << 11)) >> 11; //byte 0, bit 3
petter 8:beb6c399490a 92 result->connection = (RN52_CONNECTION)(response_value & 0x0F); //byte 1, bits 0-3
petter 8:beb6c399490a 93 switch (response_value & 0x3000) {
petter 8:beb6c399490a 94 case 0x1000: //byte 0, bit 4
petter 8:beb6c399490a 95 result->event = RN52_CALLER_ID_EVENT;
petter 0:6cf6e566c0da 96 break;
petter 8:beb6c399490a 97 case 0x2000: //byte 0, bit 5
petter 8:beb6c399490a 98 result->event = RN52_TRACK_CHANGE_EVENT;
petter 8:beb6c399490a 99 break;
petter 8:beb6c399490a 100 default:
petter 8:beb6c399490a 101 result->event = RN52_OTHER_EVENT;
petter 0:6cf6e566c0da 102 break;
petter 8:beb6c399490a 103 }
petter 8:beb6c399490a 104 return 1;
petter 8:beb6c399490a 105 }
petter 8:beb6c399490a 106
petter 8:beb6c399490a 107 bool RN52::get_caller_id(RN52_RESULT * result){
petter 8:beb6c399490a 108 serial.printf(CALLER_ID);
petter 8:beb6c399490a 109 capture_response(result->response);
petter 8:beb6c399490a 110 //parse the response
petter 8:beb6c399490a 111 return 1;
petter 8:beb6c399490a 112 }
petter 8:beb6c399490a 113
petter 11:74844f6ca8cf 114
petter 8:beb6c399490a 115 bool RN52::get_track_metadata(RN52_RESULT * result){
petter 11:74844f6ca8cf 116 /*
petter 8:beb6c399490a 117 serial.printf(TRACK_METADATA);
petter 8:beb6c399490a 118 if(capture_response(result->response)) {//AOK
petter 8:beb6c399490a 119 while(result->response[4] != '(') { //time(ms) - always the last one
petter 8:beb6c399490a 120 capture_response(result->response);
petter 8:beb6c399490a 121 switch (result->response[3]) {
petter 8:beb6c399490a 122 case 'l': //Title
petter 8:beb6c399490a 123 copy_response(result->response, result->title, 6);
petter 8:beb6c399490a 124 break;
petter 8:beb6c399490a 125 case 'i': //Artist
petter 8:beb6c399490a 126 copy_response(result->response, result->artist, 7);
petter 8:beb6c399490a 127 break;
petter 8:beb6c399490a 128 case 'u': //Album
petter 8:beb6c399490a 129 copy_response(result->response, result->album, 6);
petter 8:beb6c399490a 130 break;
petter 8:beb6c399490a 131 case 'r': //Genre
petter 8:beb6c399490a 132 copy_response(result->response, result->genre, 6);
petter 8:beb6c399490a 133 break;
petter 8:beb6c399490a 134 case 'c': //TrackNumber or TrackCount
petter 8:beb6c399490a 135 {
petter 8:beb6c399490a 136 char number_string[5];
petter 8:beb6c399490a 137 if(result->response[5] == 'N') { //TrackNumber
petter 8:beb6c399490a 138 copy_response(result->response, number_string, 12);
petter 8:beb6c399490a 139 result->track_number = strtoul(number_string, NULL, 10);
petter 8:beb6c399490a 140 }
petter 8:beb6c399490a 141 else { //TrackCount
petter 8:beb6c399490a 142 copy_response(result->response, number_string, 11);
petter 8:beb6c399490a 143 result->track_count = strtoul(number_string, NULL, 10);
petter 6:c454f88524d6 144 }
petter 6:c454f88524d6 145 }
petter 8:beb6c399490a 146 break;
petter 8:beb6c399490a 147 case 'e':
petter 8:beb6c399490a 148 {
petter 8:beb6c399490a 149 char duration_string[10];
petter 8:beb6c399490a 150 copy_response(result->response, duration_string, 9);
petter 8:beb6c399490a 151 result->duration = strtoul(duration_string, NULL, 10);
petter 8:beb6c399490a 152 }
petter 8:beb6c399490a 153 break;
petter 8:beb6c399490a 154 }
petter 8:beb6c399490a 155 }
petter 8:beb6c399490a 156 clear_serial();
petter 0:6cf6e566c0da 157 }
petter 11:74844f6ca8cf 158 */
petter 0:6cf6e566c0da 159 return 1;
petter 0:6cf6e566c0da 160 }
petter 0:6cf6e566c0da 161
petter 5:8e468fef2754 162 bool RN52::capture_response(char * str){
petter 11:74844f6ca8cf 163 responsetime.reset();
petter 11:74844f6ca8cf 164 responsetime.start();
petter 0:6cf6e566c0da 165 char c = ' ';
petter 0:6cf6e566c0da 166 char n = 0;
petter 0:6cf6e566c0da 167 while(c != '\n') {
petter 0:6cf6e566c0da 168 if(serial.readable()) {
petter 0:6cf6e566c0da 169 c = serial.getc();
petter 0:6cf6e566c0da 170 str[n] = c;
petter 0:6cf6e566c0da 171 n++;
petter 0:6cf6e566c0da 172 }
petter 11:74844f6ca8cf 173 else if(responsetime.read_ms() > RESPONSE_TIMEOUT) {
petter 11:74844f6ca8cf 174 clear_serial();
petter 11:74844f6ca8cf 175 printf("timeout occured\r\n last response: %s\r\n", str);
petter 11:74844f6ca8cf 176 return 0;
petter 11:74844f6ca8cf 177 }
petter 0:6cf6e566c0da 178 }
petter 7:2df2c6e8c0df 179 str[n-2] = '\0'; //terminate string before \r\n
petter 5:8e468fef2754 180 return (str[0] == 'A');
petter 6:c454f88524d6 181 }
petter 6:c454f88524d6 182
petter 6:c454f88524d6 183 void RN52::clear_serial(){
petter 6:c454f88524d6 184 while(serial.readable()) {
petter 6:c454f88524d6 185 serial.getc();
petter 6:c454f88524d6 186 }
petter 7:2df2c6e8c0df 187 }
petter 7:2df2c6e8c0df 188
petter 7:2df2c6e8c0df 189 void RN52::copy_response(char * source, char * destination, char offset){
petter 7:2df2c6e8c0df 190 int n = 0;
petter 7:2df2c6e8c0df 191 while(source[n+offset+1] != '\0') { //remove carraige return in the end
petter 7:2df2c6e8c0df 192 destination[n] = source[n+offset];
petter 7:2df2c6e8c0df 193 n++;
petter 7:2df2c6e8c0df 194 }
petter 7:2df2c6e8c0df 195 destination[n] = '\0'; //end string where carriage was
petter 7:2df2c6e8c0df 196 }
petter 7:2df2c6e8c0df 197
petter 7:2df2c6e8c0df 198 void RN52::clear_result(RN52_RESULT * result) {
petter 7:2df2c6e8c0df 199 result->event = RN52_NO_EVENT;
petter 7:2df2c6e8c0df 200 result->media_connected = 0;
petter 7:2df2c6e8c0df 201 result->phone_connected = 0;
petter 8:beb6c399490a 202 result->connection = RN52_NOT_SET;
petter 7:2df2c6e8c0df 203 result->title[0] = '\0';
petter 7:2df2c6e8c0df 204 result->artist[0] = '\0';
petter 7:2df2c6e8c0df 205 result->album[0] = '\0';
petter 7:2df2c6e8c0df 206 result->genre[0] = '\0';
petter 7:2df2c6e8c0df 207 result->duration = 0;
petter 9:9a4c81493a3d 208 result->track_number = 1;
petter 9:9a4c81493a3d 209 result->track_count = 1;
petter 7:2df2c6e8c0df 210 result->response[0] = '\0';
petter 0:6cf6e566c0da 211 }