How can I use a const __FlashStringHelper with a char

Projects Programming
1

Hello all

In some case, I usinf a fonction to display a text for debuging.

I call in that way:

sprint(F("Buz"),2);

The second parameter is use to eigher Display in Serial Monitor (0), write into a SD card (1), or both(2)

here is the fonction

void sprint(const __FlashStringHelper * message, int logToSd)
{
  if(logToSd == 0 || logToSd == 2)
  {
    SerialUSB.print(message);
  }
  
  if(logToSd == 1 || logToSd == 2)
  {
    #ifdef LOGGER
      sd_write(sd_logFile, message);
    #endif
  }
}

And here are the function to write SD.
The below function. The problem is, the below function does not accept __FlashStringHelper (for the text)

void sd_write(char * fileName, char * text)
{
  //SerialUSB.println("*c*");
  sd_write(fileName, text, false);
}

void sd_write(char * fileName, char * text, bool ln)
{
  #ifdef LOGGER
    if(isSdReady == true)
    {
      digitalWrite(PIN_SDLED, HIGH);
      
        logfile = SD.open(fileName, FILE_WRITE);

        // if the file opened okay, write to it:
        if (logfile) 
        {
          sprint(F("Writing ["),0);
          sprint(text,0);
          sprint(F("] to "),0);
          sprint(F(fileName),0);
          if(ln == true)
          {
            logfile.println(text);
          }
          else
          {
            logfile.print(text);
          }
          logfile.flush();
          // close the file:
          logfile.close();
          sprintln(F(" => Done."),0);
        }
        else
        {
          // if the file didn't open, print an error:
          sprint(F("\nError opening "),0); sprintln(fileName,0);
        }
        
      digitalWrite(PIN_SDLED, LOW);

      // delay(100);
    }
  #endif
}

Is there a way to craete a function as described here (see comment)

const __FlashStringHelper *

void sd_write(char * fileName, const __FlashStringHelper * text)
{

// CONVERT HERE the const __FlashStringHelper TO BE USE BY text

  sd_write(fileName, text, false);
}

Thank a lot

2

Look at how Print.cpp manages methods that take FlashStringHelper arguments.