Capacitive Touch Sensor Controlling an MP3 Player
Dependencies: 4DGL-uLCD-SE SDFileSystem TextLCD mbed wave_player
Diff: main.cpp
- Revision:
- 0:1cb83aab3f9a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Thu Dec 08 20:20:09 2016 +0000 @@ -0,0 +1,359 @@ +#include "mbed.h" +#include "SDFileSystem.h" +#include "wave_player.h" +#include "Speaker.h" +#include <vector> +#include <string> +#include "uLCD_4DGL.h" +#include "VS1002.h" +#include "mpr121.h" + +FILE *wave_file; +string current_file; +string print_file; +string song; +string new_song; +Serial pc(USBTX, USBRX); +SDFileSystem sd(p5, p6, p7, p8, "sd"); //SD card +AnalogOut DACout(p18); +uLCD_4DGL uLCD(p28, p27, p29); +Ticker play_time; + +vector<string> filenames; //filenames are stored in a vector string + +int startStop = 0; + +// OutKast, Kanye, Kenny Rogers, Sinatra, Odesza, DMX, 21 Pilots, Eminem +int array[] = { 0x000066, 0x000044, 0x000011, 0x000055, 0x000000, 0x000033, 0x000022, 0x000077}; +vector<int> artwork(array, array + 8); +//below code goes in song playing function +//uLCD.media_init(); +//uLCD.set_sector_address(0x0000, artwork[selected]); +//uLCD.display_image(0,0); + +void read_file_names(char *dir) +{ + DIR *dp; + struct dirent *dirp; + dp = opendir(dir); + //read all directory and file names in current directory into filename vector + while((dirp = readdir(dp)) != NULL) { + filenames.push_back(string(dirp->d_name)); + } +} + +VS1002 mp3(p5, p6, p7, p8,"sd",p11, p12 ,p13, p14, p23, p22, p21, p15); //Setup Audio decoder. Name is VS1002 even though VS1053 is used. +InterruptIn interrupt(p26); // Create the interrupt receiver object on pin 26 +I2C i2c(p9, p10); // Setup the i2c bus on pins 9 and 10 +Mpr121 mpr121(&i2c, Mpr121::ADD_VSS); //Setup Mpr121 + +/* Global Variables to store Status*/ +int new_song_number=0; //Variable to store the Song Number +int old_song_number=0; +int volume_left = -15; //Variable to store the Volume +int volume_right = -15; +int previous_volume_left; //Variable to store the volume when muted +int previous_volume_right; +bool stop=true; +bool pause=false; +bool old_pause=false; //Variable to store the status of Pause button +bool mute=false; +bool old_mute=false; //Variable to store the status of mute button +int size; +int first; +int t=0; +int m=0; +int oldt=0; +int selected = 0; +int check = 0; //Capacitative touch generates interrupt on both press and release. This variable tracks this and updates only on press. +int fade=0; +int old_fade=0; +int n=0; +int fade_percent; +string print_fade="Center"; + +void counter(void){ + if(!pause) + { + t++; + if(t%60==0) + { + t=0; + m++; + } + } +} + +void fade_left(void) +{ + fade--; + //pc.printf("fade left\n\rfade=%i\n\r",fade); + if(fade<-5) + fade=-5; + fade_percent = abs(fade)*20; + if(fade==0) + { + volume_left=volume_right; + print_fade=("Center"); + } + if(fade<0) + { + n=(volume_left+60)/5; + volume_right=volume_left+fade*n; + print_fade="Left"; + // pc.printf("fade<0 volume_left=%i volume_right=%i n=%i\n\r",volume_left,volume_right,n); + } + if(fade>0) + { + n=(volume_right+60)/5; + volume_left=volume_right-fade*n; + print_fade="Right"; + // pc.printf("fade>0 volume_left=%i volume_right=%i n=%i\n\r",volume_left,volume_right,n); + } +} + +void fade_right(void) +{ + fade++; + pc.printf("fade right\n\rfade=%i\n\r",fade); + if(fade>5) + fade=5; + fade_percent = abs(fade)*20; + if(fade==0) + { + volume_right=volume_left; + print_fade=("Center"); + } + if(fade<0) + { + n=(volume_left+60)/5; + volume_right=volume_left+fade*n; + print_fade="Left"; + // pc.printf("fade<0 volume_left=%i volume_right=%i n=%i\n\r",volume_left,volume_right,n); + } + if(fade>0) + { + n=(volume_right+60)/5; + volume_left=volume_right-fade*n; + print_fade="Right"; + // pc.printf("fade>0 volume_left=%i volume_right=%i n=%i\n\r",volume_left,volume_right,n); + } +} + +void volume_up(void) +{ + if(fade==0) + { + if(volume_right!=0) + volume_right+=5; + if(volume_left!=0) + volume_left+=5; + } + if(fade<0) + { + if(volume_left!=0) + { + volume_left+=5; + n=(volume_left+60)/5; + volume_right=volume_left+fade*n; + } + } + if(fade>0) + { + if(volume_right!=0) + { + volume_right+=5; + n=(volume_right+60)/5; + volume_left=volume_right-fade*n; + } + } +} + +void volume_down(void) +{ + if(fade==0) + { + if(volume_right!=-60) + volume_right-=5; + if(volume_left!=-60) + volume_left-=5; + } + if(fade<0) + { + if(volume_left!=-60) + { + volume_left-=5; + n=(volume_left+60)/5; + volume_right=volume_left+fade*n; + if(volume_right<-60) + volume_right=-60; + } + } + if(fade>0) + { + if(volume_right!=-60) + { + volume_right-=5; + n=(volume_right+60)/5; + volume_left=volume_right-fade*n; + if(volume_left<-60) + volume_left=-60; + } + } +} + +void fallInterrupt() +{ + int key_code=0; + int i=0; + int value; + value=mpr121.read(0x00); + value +=mpr121.read(0x01)<<8; + + i=0; + if(check) + check=0; + else + check=1; + if(check) { + for (i=0; i<12; i++) { + if (((value>>i)&0x01)==1) key_code=i+1; //Convert value into decimal + } + + switch(key_code) { // Different cases depending on key press + case 0: + break; // Invalid entry . Valid 1-12 + case 1: + if(stop) + { + new_song_number+=1; // Move selecter down + if(new_song_number==filenames.size()) + new_song_number=0; // go back to beginning of vector + } + break; + case 2: + //play/stop button + stop=!stop; + first=0; + break; + case 3: + fade_right(); + break; + case 4: + fade_left(); + break; + case 5: + if(stop) + { + new_song_number-=1; // move selecetor up + if(new_song_number==-1) + new_song_number=filenames.size()-1; // Go to end of vector + } + break; + case 6: + break; + case 7: + new_song_number+=1; // Otherwise Next song + if(new_song_number==filenames.size()){ + new_song_number=0; // go back to beginning of vector + } + break; + case 8: + new_song_number-=1; // Previous Song + if(new_song_number==-1){ + new_song_number=filenames.size()-1; // Go to end of vector + } + break; + case 9: + old_pause=pause; + pause=!pause; // Pause/Play button + //stop=false; + //first=0; + break; + case 10: + volume_up(); + break; + case 11: + volume_down(); + break; + case 12: + old_mute=mute; + mute=!mute; //Mute/Unmute + if(mute) { + previous_volume_left = volume_left; // Attenuation of -55 db is small enough to not hear anything + previous_volume_right = volume_right; + volume_left = -60; + volume_right = -60; + } else { + volume_left=previous_volume_left; + volume_right = previous_volume_right; + } + break; + default: + uLCD.cls(); + uLCD.printf("error"); // exit on error + exit(1); + } + } +} +int main () +{ + read_file_names("/sd/myMusic"); // read file names into vector of strings + + + /*============================================================ + * MP3 Initialising + *==========================================================*/ + + mp3._RST = 1; + mp3.cs_high(); //chip disabled + mp3.sci_initialise(); //initialise MBED + mp3.sci_write(0x00,(SM_SDINEW+SM_STREAM+SM_DIFF)); + mp3.sci_write(0x03, 0x9800); + mp3.sdi_initialise(); + + + /* Touch Pad setup */ + interrupt.fall(&fallInterrupt); + interrupt.mode(PullUp); + play_time.attach(&counter, 1.0); + + while(1) { + if(stop) + { + if(first==0) + { + uLCD.cls(); + int i=0; + // print filename strings from vector using an iterator + for(vector<string>::iterator it=filenames.begin(); it < filenames.end(); it++) + { + print_file = (*it).substr(0, ((*it).size() - 4)); + uLCD.locate(1,i); + uLCD.printf("%s\n",print_file.c_str()); + i++; + } + size = filenames.size(); + first++; + } + uLCD.locate(0,new_song_number); + uLCD.printf("*"); + if(old_song_number!=new_song_number) + { + uLCD.locate(0,old_song_number); + uLCD.printf(" "); + old_song_number=new_song_number; + } + } + if(!stop) + { + current_file = filenames[new_song_number]; + print_file = current_file.substr(0, (current_file.size() - 4)); + string song = "/sd/myMusic/" + current_file; + mp3.play_song(song, print_file, new_song_number); + } + } + +} + +