6 years, 4 months ago.

Error: Undefined symbol $Super$$main (referred from retarget.cpp.NUCLEO_F401RE.o).

/* mbed TextDisplay Display Library Base Class

  1. include "TextDisplay.h"

TextDisplay::TextDisplay(const char *name) : Stream(name){ _row = 0; _column = 0; if (name == NULL) { _path = NULL; } else { _path = new char[strlen(name) + 2]; sprintf(_path, "/%s", name); } }

int TextDisplay::_putc(int value) { if(value == '\n') { _column = 0; _row++; if(_row >= rows()) { _row = 0; } } else { character(_column, _row, value); _column++; if(_column >= columns()) { _column = 0; _row++; if(_row >= rows()) { _row = 0; } } } return value; }

crude cls implementation, should generally be overwritten in derived class void TextDisplay::cls() { locate(0, 0); for(int i=0; i<columns()*rows(); i++) { putc(' '); } }

void TextDisplay::locate(int column, int row) { _column = column; _row = row; }

int TextDisplay::_getc() { return -1; }

void TextDisplay::foreground(uint16_t colour) { _foreground = colour; }

void TextDisplay::background(uint16_t colour) { _background = colour; }

bool TextDisplay::claim (FILE *stream) { if ( _path == NULL) { fprintf(stderr, "claim requires a name to be given in the instantioator of the TextDisplay instance!\r\n"); return false; } if (freopen(_path, "w", stream) == NULL) { Failed, should not happen return false; } make sure we use line buffering setvbuf(stdout, NULL, _IOLBF, columns()); return true; }

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1 Answer

6 years, 4 months ago.

Hi,

you are trying to link a library. The application layer is missing aka main(), please add a code file which contains main function. There are examples which you can directly import.

Regards,
0xc0170

Accepted Answer