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My C is rusty, so please forgive this simple problem.

This line works:

Tft.drawString("Test",200,200,2,WHITE);

But, this has compile errors:

String yStr = "Test";  
Tft.drawString(yStr,200,200,2,WHITE);  

The function in the library:

void drawString(char *string,unsigned int poX, unsigned int poY,unsigned int size,unsigned int fgcolor);

The error is "no known conversion for argument 1 from 'String' to 'char*'"

Conclusion - I need a character array. Here's what I am trying to accomplish.

I have two integers that I would like to display on my Tft screen. For example, 225 and 250 to be displayed as "225,250".

I haven't figured out a way to build the char array for the drawString() function.

Assistance would be appreciated.

Thanks for the quick reply Ignacio.
I tried that, but the compiler still doesn't like it.

Here's how I built the string:

string stringXY ;
stringXY += xStr;
stringXY += ",";
stringXY += yStr;
Tft.drawString(stringXY.c_str(),200,200,2,RED);  

error: invalid conversion from 'const char*' to 'char*' [-fpermissive]

I am apparently using c_str() wrong?

My C is rusty, so please forgive this simple problem.

This line works:

Tft.drawString("Test",200,200,2,WHITE);

But, this has compile errors:

String yStr = "Test";  
Tft.drawString(yStr,200,200,2,WHITE);  

The function in the library:

void drawString(char *string,unsigned int poX, unsigned int poY,unsigned int size,unsigned int fgcolor);

The error is *"no known conversion for argument 1 from 'String' to 'char'"**.

Conclusion - I need a character array. Here's what I am trying to accomplish.

I have two integers that I would like to display on my Tft screen. For example, 225 and 250 to be displayed as "225,250".

I haven't figured out a way to build the char array for the drawString() function.

Assistance would be appreciated.

Thanks for the quick reply Ignacio.
I tried that, but the compiler still doesn't like it.

Here's how I built the string:

string stringXY ;
stringXY += xStr;
stringXY += ",";
stringXY += yStr;
Tft.drawString(stringXY.c_str(),200,200,2,RED);  

Error: invalid conversion from 'const char' to 'char' [-fpermissive]**

I am apparently using c_str() wrong?

My C is rusty, so please forgive this simple problem.

This line works:

Tft.drawString("Test",200,200,2,WHITE);

But, this has compile errors:

String yStr = "Test";
Tft.drawString(yStr,200,200,2,WHITE);

The function in the library:

void drawString(char *string,unsigned int poX, unsigned int poY,unsigned int size,unsigned int fgcolor);

The error is "no known conversion for argument 1 from 'String' to 'char*'"

Conclusion - I need a character array. Here's what I am trying to accomplish.

I have two integers that I would like to display on my Tft screen. For example, 225 and 250 to be displayed as "225,250".

I haven't figured out a way to build the char array for the drawString() function.

Assistance would be appreciated.

Thanks for the quick reply Ignacio.
I tried that, but the compiler still doesn't like it.

Here's how I built the string:

String stringXY ;

stringXY += xStr;

stringXY += ",";

stringXY += yStr;

Tft.drawString(stringXY.c_str(),200,200,2,RED);
error: invalid conversion from 'const char*' to 'char*' [-fpermissive]

I am apparently using c_str() wrong?

My C is rusty, so please forgive this simple problem.

This line works:

Tft.drawString("Test",200,200,2,WHITE);

But, this has compile errors:

String yStr = "Test";  
Tft.drawString(yStr,200,200,2,WHITE);  

The function in the library:

void drawString(char *string,unsigned int poX, unsigned int poY,unsigned int size,unsigned int fgcolor);

The error is "no known conversion for argument 1 from 'String' to 'char*'"

Conclusion - I need a character array. Here's what I am trying to accomplish.

I have two integers that I would like to display on my Tft screen. For example, 225 and 250 to be displayed as "225,250".

I haven't figured out a way to build the char array for the drawString() function.

Assistance would be appreciated.

Thanks for the quick reply Ignacio.
I tried that, but the compiler still doesn't like it.

Here's how I built the string:

string stringXY ;
stringXY += xStr;
stringXY += ",";
stringXY += yStr;
Tft.drawString(stringXY.c_str(),200,200,2,RED);  

error: invalid conversion from 'const char*' to 'char*' [-fpermissive]

I am apparently using c_str() wrong?

My C is rusty, so please forgive this simple problem.

This line works:

Tft.drawString("Test",200,200,2,WHITE);

But, this has compile errors:

String yStr = "Test";
Tft.drawString(yStr,200,200,2,WHITE);

The function in the library:

void drawString(char *string,unsigned int poX, unsigned int poY,unsigned int size,unsigned int fgcolor);

The error is "no known conversion for argument 1 from 'String' to 'char*'"

Conclusion - I need a character array. Here's what I am trying to accomplish.

I have two integers that I would like to display on my Tft screen. For example, 225 and 250 to be displayed as "225,250".

I haven't figured out a way to build the char array for the drawString() function.

Assistance would be appreciated.

Thanks for the quick reply Ignacio.
I tried that, but the compiler still doesn't like it.

Here's how I built the string:

String stringXY ; stringXY += xStr; stringXY += ","; stringXY += yStr;

Tft.drawString(stringXY.c_str(),200,200,2,RED);
error: invalid conversion from 'const char*' to 'char*' [-fpermissive]

I am apparently using c_str() wrong?

My C is rusty, so please forgive this simple problem.

This line works:

Tft.drawString("Test",200,200,2,WHITE);

But, this has compile errors:

String yStr = "Test";
Tft.drawString(yStr,200,200,2,WHITE);

The function in the library:

void drawString(char *string,unsigned int poX, unsigned int poY,unsigned int size,unsigned int fgcolor);

The error is "no known conversion for argument 1 from 'String' to 'char*'"

Conclusion - I need a character array. Here's what I am trying to accomplish.

I have two integers that I would like to display on my Tft screen. For example, 225 and 250 to be displayed as "225,250".

I haven't figured out a way to build the char array for the drawString() function.

Assistance would be appreciated.

Thanks for the quick reply Ignacio.
I tried that, but the compiler still doesn't like it.

Here's how I built the string:

String stringXY ;

stringXY += xStr;

stringXY += ",";

stringXY += yStr;

Tft.drawString(stringXY.c_str(),200,200,2,RED);
error: invalid conversion from 'const char*' to 'char*' [-fpermissive]

I am apparently using c_str() wrong?