Si4703 FM Tuner Question

Sensors Sound & Audio
1

If we look at this code:

#include <SparkFunSi4703.h>
#include <Wire.h>

int resetPin = 2;
int SDIO = A4;
int SCLK = A5;
int STC = 3;

Si4703_Breakout radio(resetPin, SDIO, SCLK, STC);
int channel;
int volume;
char rdsBuffer[10];

void setup()
{
  Serial.begin(9600);
  Serial.println("\n\nSi4703_Breakout Test Sketch");
  Serial.println("===========================");  
  Serial.println("a b     Favourite stations");
  Serial.println("+ -     Volume (max 15)");
  Serial.println("u d     Seek up / down");
  Serial.println("r       Listen for RDS Data (15 sec timeout)");
  Serial.println("Send me a command letter.");
  

  radio.powerOn();
  radio.setVolume(0);
}

void loop()
{
  if (Serial.available())
  {
    char ch = Serial.read();
    if (ch == 'u') 
    {
      channel = radio.seekUp();
      displayInfo();
    } 
    else if (ch == 'd') 
    {
      channel = radio.seekDown();
      displayInfo();
    } 
    else if (ch == '+') 
    {
      volume ++;
      if (volume == 16) volume = 15;
      radio.setVolume(volume);
      displayInfo();
    } 
    else if (ch == '-') 
    {
      volume --;
      if (volume < 0) volume = 0;
      radio.setVolume(volume);
      displayInfo();
    } 
    else if (ch == 'a')
    {
      channel = 930; // Rock FM
      radio.setChannel(channel);
      displayInfo();
    }
    else if (ch == 'b')
    {
      channel = 974; // BBC R4
      radio.setChannel(channel);
      displayInfo();
    }
    else if (ch == 'r')
    {
      Serial.println("RDS listening");
      radio.readRDS(rdsBuffer, 15000);
      Serial.print("RDS heard:");
      Serial.println(rdsBuffer);      
    }
  }
}

void displayInfo()
{
   Serial.print("Channel:"); Serial.print(channel); 
   Serial.print(" Volume:"); Serial.println(volume); 
}

We see the line radio.readRDS(rdsBuffer, 15000);, however, this is blocking. The 15000 is how long (milliseconds) it will listen before timing out. Does anyone one know if there is a way to make it non blocking, so it can listen in the background while I do other things (like change volume etc)?

2

ChatGPT thinks this will fix it, maybe give it a try:

#include <SparkFunSi4703.h>

#include <Wire.h>

int resetPin = 2;

int SDIO = A4;

int SCLK = A5;

int STC = 3;

Si4703_Breakout radio(resetPin, SDIO, SCLK, STC);

int channel;

int volume;

char rdsBuffer[10];

unsigned long rdsStartTime = 0; // Variable to store the start time for RDS listening

unsigned long rdsTimeout = 15000; // RDS listening timeout in milliseconds

void setup()

{

Serial.begin(9600);

Serial.println(“\n\nSi4703_Breakout Test Sketch”);

Serial.println(“===========================”);

Serial.println(“a b Favourite stations”);

Serial.println(“+ - Volume (max 15)”);

Serial.println(“u d Seek up / down”);

Serial.println(“r Listen for RDS Data (15 sec timeout)”);

Serial.println(“Send me a command letter.”);

radio.powerOn();

radio.setVolume(0);

}

void loop()

{

if (Serial.available())

{

char ch = Serial.read();

if (ch == ‘u’)

{

channel = radio.seekUp();

displayInfo();

}

else if (ch == ‘d’)

{

channel = radio.seekDown();

displayInfo();

}

else if (ch == ‘+’)

{

volume++;

if (volume == 16) volume = 15;

radio.setVolume(volume);

displayInfo();

}

else if (ch == ‘-’)

{

volume–;

if (volume < 0) volume = 0;

radio.setVolume(volume);

displayInfo();

}

else if (ch == ‘a’)

{

channel = 930; // Rock FM

radio.setChannel(channel);

displayInfo();

}

else if (ch == ‘b’)

{

channel = 974; // BBC R4

radio.setChannel(channel);

displayInfo();

}

else if (ch == ‘r’)

{

Serial.println(“RDS listening started”);

rdsStartTime = millis(); // Store the current time as the start time

}

}

// Check if the RDS listening timeout has elapsed

if (rdsStartTime > 0 && millis() - rdsStartTime >= rdsTimeout)

{

Serial.println(“RDS listening timeout”);

rdsStartTime = 0; // Reset the start time

}

else if (rdsStartTime > 0)

{

// Continue to listen for RDS data

radio.readRDS(rdsBuffer, rdsTimeout - (millis() - rdsStartTime));

Serial.print(“RDS heard:”);

Serial.println(rdsBuffer);

rdsStartTime = 0; // Reset the start time

}

}

void displayInfo()

{

Serial.print("Channel: ");

Serial.print(channel);

Serial.print(" Volume: ");

Serial.println(volume);

}

3

Not at all. It’s a problem in the library, not the code. I’ve already tried ChatGPT, but no success

4

Darn it…it might need something changed in the core library or maybe you can find another code/project with a solution