how can i run audio.loop() in a separate task?

[renatoianhez]

If I run audio.loop() in a separate task, I assume that, being dedicated, the kernel will run the streams without the dropouts due to screen refresh and other tasks. I came to this conclusion after observing that my webradio screen gives small blinks (when I look at the screen tilted) while playing the streams and these blinks occur in sync with the dropouts. (Is my observation correct?) However, I don't know how to deal with task definition. Can you guys help me with this?

[Fre19]

Hi,
Have a look at:
https://randomnerdtutorials.com/esp32-dual-core-arduino-ide/
The normal core in use in the esp32 is core 1. I suggest to leave it there and put the extra's like display code in core 0. When you use core 0 as the example describes, do not forget to put your 'entire display setup code block' in core 0 (not in setup()!), just after the void "your function name" (void * parameter) code line. Then write the display code just after the for(;;) , which is then the loop-forever in core 0
success
Fre19

[renatoianhez]

Thanks!!

[renatoianhez]

I try... Not work.
Since the screen update is linked to the radio station change (radio url), the screen will update, but the radio address will not.
Another thing I noticed was a lot of noise when switching radio stations.

#include <Arduino.h>
#include <TFT_eSPI.h> // Biblioteca da tela
#include <SPI.h> // SPI
#include <WiFi.h> // Pra funcionar o WiFi
#include "Audio.h" // Biblioteca do audio
#include "Free_Fonts.h" // Fontes

#define canalPraCima  0   // Botoes para mudar a estacao
#define canalPraBaixo 4
#define I2S_DOUT      25  // Pinos do audio I2S
#define I2S_BCLK      27
#define I2S_LRCK      26

bool mudouEstacao;
int radioTocando;

TFT_eSPI tela = TFT_eSPI(); // Os pinos da tela sao definidos na biblioteca
Audio audio;

//Radios e enderecos
const char* nomeRadio[30] = {
  "Antena 1",   // 0
  "Kiss",       // 1
  "Eldorado FM",   // 2
  "Cultura", // 3
  "Itatiaia",   // 4
  "Dominicana",     // 5
  "BFF.fm",   // 6
  "Saudade",    // 7
  "Radio USP",     // 8
  "CBN BH",
  "Radio UFMG",
  "Tribuna",
  "Smooth Jazz",
  "ABC Lounge",
  "JB FM",
  "Chante France",
  "Guerrilla",
  "Antenne",
  "Alvorada",
  "Univers. UFU",
  "Radio Jamaica",
  "Som das Gerais",
  "Axe Bahia",
  "Seresta aoLuar",
  "XFM",
  "Super 70s",
  "Classic Hits",
  "WROD",
  "Univers. UFES",
  "Tonic Ska"
};
const char* tipoRadio[30] = {
  "FM - Hits Internacional",
  "FM - Rock",
  "FM - Noticia/Musica",
  "FM - MPB",
  "AM - Noticia/Musica",
  "Web - Salsa",
  "Web - Indie/Wolrd",
  "FM - Flash Back",
  "FM - MPB",
  "FM - Noticias",
  "FM - MPB/Varios",
  "FM - Hits/Flash Back",
  "Web - Jazz",
  "Web - Light/Lounge",
  "FM - Hits/Flash Back",
  "Web - Chanson Francaise",
  "Web - Alternative/Rock",
  "Web - Flash Back/Rock",
  "FM - Hits/Flash Back",
  "FM - MPB/Varios",
  "FM - Reggae",
  "Web - MPB",
  "Web - Axe",
  "Web - Seresta",
  "FM - Rock",
  "Web - Flash Back/Rock",
  "Web - Flash Back/Rock",
  "FM - Rock",
  "FM - MPB/Samba",
  "Web - Ska/Reggae"
};

const char* cidadeRadio[30] = {
  "Sao Paulo SP",
  "Sao Paulo SP",
  "Sao Paulo SP",
  "Sao Paulo SP",
  "Belo Horizonte MG",
  "Santo Domingo - R. Dom",
  "San Francisco CA - USA",
  "Santos SP",
  "Sao Paulo SP",
  "Belo Horizonte MG",
  "Belo Horizonte MG",
  "Vitoria ES",
  "New York - USA",
  "Londres - UK",
  "Rio de Janeiro RJ",
  "Paris - Franca",
  "Sarasota FL - USA",
  "Bayern - Alemanha",
  "Belo Horizonte MG",
  "Uberlandia MG",
  "Kingston - Jamaica",
  "Uberaba MG",
  "Salvador BA",
  "Taubate SP",
  "Londres - UK",
  "Waynesboro VA - EUA",
  "Waynesboro VA - EUA",
  "Daytona Beach FL - EUA",
  "Vitoria ES",
  "Londres - UK"
};
String urlRadio[] = {
  "https://antenaone.crossradio.com.br/stream/1;", // Antena 1 OK
  "http://cloud2.cdnseguro.com:23538/;", // Kiss FM OK
  "https://eldoradolive02.akamaized.net/hls/live/2043453/eldorado/master.m3u8", // Eldorado
  "http://radiocultura2.jmvstream.com/stream", // Cultura OK
  "http://8903.brasilstream.com.br:8903/stream?1616578451161", // Itatiaia OK
  "http://radio.domiplay.net:2002/;", // Dominicana OK
  "https://ais-sa2.cdnstream1.com/2053_128.mp3", // BFF.FM
  "http://22073.live.streamtheworld.com/SAUDADE_FMAAC.aac", // Saudade OK
  "http://flow.emm.usp.br:8007/radiousp-128.mp3", // USP OK
  "http://20323.live.streamtheworld.com/CBN_BH_ADP/HLS/playlist.m3u8", // CBN OK
  "http://150.164.63.210:8000/aovivo.mp3", // UFMG OK no tags
  "http://cast.midiaip.com.br:6060/stream?1506557548760", // Tribuna GL+
  "https://hestia2.cdnstream.com/1078_128?cb=696226.mp3",  // Smooth Jazz
  "http://str1.openstream.co/589", // ABC Louge GL++
  "https://24083.live.streamtheworld.com/JBFMAAC.aac", // JB GL+
  "https://chantefranceemotion.ice.infomaniak.ch/chantefranceemotion-96.aac", // Chante France
  "https://s2.stationplaylist.com:9460/guerrilla", // Guerrilla
  "http://s9-webradio.webradio.de/oldies-but-goldies", // Antenne Oldies GL+++
  "http://20323.live.streamtheworld.com/RADIO_ALVORADAAAC_SC", // Alvorada OK
  "http://webradio.dr.ufu.br:8000/live", // UFU OK
  "http://hestia2.cdnstream.com/1301_128?1582209939912", // Jamaica OK
  "https://player-ssl.kshost.com.br:11616/live", // Som das Gerais OK
  "http://euroticast5.euroti.com.br:8070/;", // Axe BA OK
  "http://50.3.30.111:8042/stream", // Seresta ao Luar OK
  "http://media-ice.musicradio.com/RadioXLondon", // XFM GL+
  "http://relay.181.fm:8066/", // 181 Super 70 OK
  "http://relay.181.fm:8132/", // 181 Classic OK
  "http://ice7.securenetsystems.net/WROD", // WROD GL+
  "http://8642.brasilstream.com.br/stream?identifica=9725815160273912000&rand=9201410188400340000", //UFES OK
  "https://eu10.fastcast4u.com/tonicska" // Tonic Ska GL++
};

String nomedaRede = ("Renato"); // Dados do WiFi local
String senhadaRede = ("abacatequecaiudope");
TaskHandle_t Tela;

void setup() {
  Serial.begin( 115200 ); // inicia o serial
  WiFi.disconnect(); // Conecta ao WiFi
  WiFi.mode(WIFI_STA);
  WiFi.begin(nomedaRede.c_str(), senhadaRede.c_str());
  while (WiFi.status() != WL_CONNECTED) delay(1500); // Insiste em conectar
  xTaskCreatePinnedToCore(
    tarefaTela, // Funcao da tarefa
    "Tela", // Nome da tarefa
    10000,  // Tamanho, em words
    NULL,  // Parametro de entrada (nenhum)
    0,  // Prioridade (0 a 14)
    &Tela,  // Handle
    0); // Nucleo que vai rodar
  audio.setPinout(I2S_BCLK, I2S_LRCK, I2S_DOUT); // Configura o audio
  audio.setVolume(12); // volume vai de zero a 21
  audio.setConnectionTimeout(2000, 7200); // Garante a conexao as estacoes
  audio.setTone(-2, -4, -8); // Equalizador grave - medio - agudo (-40 a 6)
  audio.setBufsize(0, 4194252);
  // audio.forceMono(true); // Força o mono
  // audio.setBalance(0); // Balanco estereo direito - esquerdo (-16 a 16)
}
void tarefaTela(void * parameter) {
  pinMode(canalPraCima, INPUT_PULLUP); // Modo dos botoes
  pinMode(canalPraBaixo, INPUT_PULLUP);
  tela.init(); // Inicia o display
  tela.setRotation(1); // Modo paisagem
  tela.invertDisplay(1); // Necessario para acertar as cores
  radioTocando = random(0, 30); // Sorteia e primeira estacao
  mudouEstacao = true;
  for (;;) {
    if (digitalRead(canalPraCima) == LOW) {//Se apertar o botao pra subir a estacao
      radioTocando = radioTocando + 1;          // incrementa o indice
      tela.fillScreen(TFT_BLACK);
      tela.setTextColor(TFT_RED, TFT_WHITE);
      tela.setCursor(0, 0, 4);
      tela.println("Sintonizando!");
      delay(1000); // uma pausa pra largar o botao
      if (radioTocando > 29) {     // Testa se passou da ultima estacao da lista
        radioTocando = 0;         // se sim vai pra primeira da playlist
        mudouEstacao = true;   // Avisa la que mudou de estacao!
      }
    }
    if (digitalRead(canalPraBaixo) == LOW) {//Se apertar o botao para descer a estacao:
      radioTocando = radioTocando - 1;        // decrementa o indice
      tela.fillScreen(TFT_BLACK);
      tela.setCursor(0, 0, 4);
      tela.setTextColor(TFT_RED, TFT_WHITE);
      tela.println("Sintonizando!");
      delay(1000); // uma pausa pra largar o botao
      if (radioTocando < 0) {     // Testa se passou pra baixo da primeira da lista
        radioTocando = 29;      // se sim vai pra ultima da playlist
      }
      mudouEstacao = true;  //Avisa la que mudou de estacao tambem!
    }
    if (mudouEstacao) {     //Se a estacao mudou, atualiza o LCD e o terminal
      tela.setFreeFont(FF5);
      tela.fillScreen(TFT_BLACK);
      tela.fillRect(0, 0, 160, 28, TFT_WHITE);
      int centro = 77 - (11 * ((strlen(nomeRadio[radioTocando])) / 2));
      tela.setCursor(centro, 18);
      tela.setTextColor(TFT_BLUE); //texto azul
      tela.println(nomeRadio[radioTocando]); // nome da radio centralizado
      tela.setTextFont(2);
      tela.setCursor(0, 30);
      tela.setTextColor(TFT_ORANGE);
      tela.println(cidadeRadio[radioTocando]);
      tela.setCursor(0, 45, 2);
      tela.setTextColor(TFT_YELLOW);
      tela.println(tipoRadio[radioTocando]);
      audio.connecttohost(urlRadio[radioTocando].c_str());
      delay(500);
      mudouEstacao = false; // Mantem a estacao que esta tocando
    }
  }
}

void audio_info(const char *info) {
  Serial.print("info        ");
  Serial.println(info);
}

void audio_showstreamtitle(const char *titulo) { // Pra mostrar o nome da musica e cantor
  tela.setCursor(0, 60, 2);
  tela.setTextColor(TFT_CYAN, TFT_BLACK);
  tela.println("Tocando agora:");
  tela.setCursor(0, 75, 2);
  tela.println("                                                                                    "); //Pra limpar
  tela.setCursor(0, 75, 2);
  tela.println(titulo);
}

void loop() {
  audio.loop();
}

[rboeije1]

Was this ever resolved? I stumbled over the same issue, that display did not update anymore as soon as the streaming started. I thought about putting some code on a dedicated core, so more or less this solution, but I read it does not work. Or?
I use the same TFT library, on a display with ILI9341. (I got my hands on the small 3W I2S device and thought 'Let's make a simple webradio using a spare display and rotary encoder. I lost a day trying to find out why my display stopped working after some time, until I decided to block out all 'Audio' code.) I already had my display updates in a separate task.
So before I put energy in splitting the code further and try what part to run on what core, it would be nice to know if this makes sense.
Thanks a lot!

[biologist79]

https://github.com/biologist79/ESPuino/blob/master/src/AudioPlayer.cpp#L113

[rboeije1]

Thanks, it shows how to put audio in a separate task, but not sure if that resolves the TFT_eSPI issue, as this player uses a web interface. But I will have a look at it.

[biologist79]

Yes, indeed. It just points out how to put in a separate task. Displays are not (yet?) used in this (my) project.