David Smart / RA8875 Featured

Library to control a Graphics TFT connected to 4-wire SPI - revised for the Raio RA8875 Display Controller.

Dependents:   FRDM_RA8875_mPaint RA8875_Demo RA8875_KeyPadDemo SignalGenerator ... more

Fork of SPI_TFT by Peter Drescher

See Components - RA8875 Based Display

Enhanced touch-screen support - where it previous supported both the Resistive Touch and Capacitive Touch based on the FT5206 Touch Controller, now it also has support for the GSL1680 Touch Controller.

Offline Help Manual (Windows chm)

/media/uploads/WiredHome/ra8875.zip.bin (download, rename to .zip and unzip)

TextDisplay.cpp

Committer:
WiredHome
Date:
2019-03-24
Revision:
176:4ab96d33a8ec
Parent:
167:8aa3fb2a5a31
Child:
182:8832d03a2a29

File content as of revision 176:4ab96d33a8ec:

// mbed TextDisplay Display Library Base Class
// Copyright © 2007-2009 sford
// Released under the MIT License: http://mbed.org/license/mit

#include "TextDisplay.h"

//#define DEBUG "Text"
// ...
// INFO("Stuff to show %d", var); // new-line is automatically appended
//
#if (defined(DEBUG) && !defined(TARGET_LPC11U24))
#define INFO(x, ...) std::printf("[INF %s %3d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
#define WARN(x, ...) std::printf("[WRN %s %3d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
#define ERR(x, ...)  std::printf("[ERR %s %3d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
#else
#define INFO(x, ...)
#define WARN(x, ...)
#define ERR(x, ...)
#endif

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

//TextDisplay::~TextDisplay()
//{
//    delete [] _path;
//}

int TextDisplay::_putc(int value)
{
    INFO("_putc(%d)", 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
RetCode_t TextDisplay::cls(uint16_t layers)
{
    INFO("cls()");
    locate(0, 0);
    for(int i=0; i<columns()*rows(); i++) {
        putc(' ');
    }
    return noerror;
}

RetCode_t TextDisplay::locate(textloc_t column, textloc_t row)
{
    INFO("locate(%d,%d)", column, row);
    _column = column;
    _row = row;
    return noerror;
}

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

RetCode_t TextDisplay::foreground(uint16_t color)
{
    //INFO("foreground(%4X)", color);
    _foreground = color;
    return noerror;
}

RetCode_t TextDisplay::background(uint16_t color)
{
    //INFO("background(%4X)", color);
    _background = color;
    return noerror;
}

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