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10 years, 8 months ago.
Compiler error while porting Arduino library
I don't think you'll need to read all the code, it's just the first line (after the compiler stuff) that is giving the compiler error.
Error: Not a class or struct name in "Adafruit_GFX/Adafruit_GFX.h", Line: 10, Col: 29
#ifndef _ADAFRUIT_GFX_H
#define _ADAFRUIT_GFX_H
#include "mbed.h"
//#include "Arduino.h"
//#include "Print.h"
#define swap(a, b) { int16_t t = a; a = b; b = t; }
class Adafruit_GFX : public Print { // THIS LINE RIGHT HERE
public:
Adafruit_GFX(int16_t w, int16_t h); // Constructor
// This MUST be defined by the subclass:
virtual void drawPixel(int16_t x, int16_t y, uint16_t color) = 0;
// These MAY be overridden by the subclass to provide device-specific
// optimized code. Otherwise 'generic' versions are used.
virtual void
drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color),
drawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color),
drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color),
drawRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color),
fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color),
fillScreen(uint16_t color),
invertDisplay(bool i);
// These exist only with Adafruit_GFX (no subclass overrides)
void
drawCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color),
drawCircleHelper(int16_t x0, int16_t y0, int16_t r, uint8_t cornername,
uint16_t color),
fillCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color),
fillCircleHelper(int16_t x0, int16_t y0, int16_t r, uint8_t cornername,
int16_t delta, uint16_t color),
drawTriangle(int16_t x0, int16_t y0, int16_t x1, int16_t y1,
int16_t x2, int16_t y2, uint16_t color),
fillTriangle(int16_t x0, int16_t y0, int16_t x1, int16_t y1,
int16_t x2, int16_t y2, uint16_t color),
drawRoundRect(int16_t x0, int16_t y0, int16_t w, int16_t h,
int16_t radius, uint16_t color),
fillRoundRect(int16_t x0, int16_t y0, int16_t w, int16_t h,
int16_t radius, uint16_t color),
drawBitmap(int16_t x, int16_t y, const uint8_t *bitmap,
int16_t w, int16_t h, uint16_t color),
drawChar(int16_t x, int16_t y, unsigned char c, uint16_t color,
uint16_t bg, uint8_t size),
setCursor(int16_t x, int16_t y),
setTextColor(uint16_t c),
setTextColor(uint16_t c, uint16_t bg),
setTextSize(uint8_t s),
setTextWrap(bool w),
setRotation(uint8_t r);
#if ARDUINO >= 100
virtual size_t write(uint8_t);
#else
virtual void write(uint8_t);
#endif
int16_t
height(void),
width(void);
uint8_t getRotation(void);
protected:
const int16_t
WIDTH, HEIGHT; // This is the 'raw' display w/h - never changes
int16_t
_width, _height, // Display w/h as modified by current rotation
cursor_x, cursor_y;
uint16_t
textcolor, textbgcolor;
uint8_t
textsize,
rotation;
bool
wrap; // If set, 'wrap' text at right edge of display
};
1 Answer
10 years, 8 months ago.
Ok so I figured its because I commented out Print.h from the Arduino library. Does mbed have a similar library?
Of course if I just import Arduino's Print.h, it will need 3 more files, which in turn will need 10 more files and so on...
Hello Tony Otis,
what does Print class define? That's the question. There's no print class as I am aware of, at least in mbed sources. Can be though ported by another user. Is this print class https://github.com/arduino/Arduino/blob/master/hardware/arduino/cores/arduino/Print.h ?? If yes, just remoe that inheritance, printf will be retargeted to default uart on your board, should not cause any problems.
Regards,
0xc0170
However then he can't use printf with his display ;).
On mbed the almost equivalent is probably Stream, it works without inhereting anything, but then you can't use [name].printf to write to your display. Only of course Stream requires different methods to write to the display:
Copy-pasting from one of my own what you need to implement:
virtual int _putc(int c);
virtual int _getc() {
return 0;
}
You need to implement getc and putc, since you cannot read from a display, _getc is implemented simply with return 0. I *think* _putc is the equivalent of write in that code. So you need to replace write everywhere with _putc, and it should work.
posted by 05 Mar 2014