LED_Matrix/LED_Matrix.cpp at master · wilmsn/LED_Matrix · GitHub

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/*
 * LED_Matrix.cpp
 *
 * Created on: 28.11.2018
 * Author: Norbert Wilms
 *
 * This is a library for MAX7219 driven LED Matrix Displays
 * More details in header file!
 *
*/

#include"LED_Matrix.h"

LED_Matrix::LED_Matrix(unsignedint dinPin, unsignedint clkPin, unsignedint csPin, unsignedint devicesX, unsignedint devicesY) {
	_dinPin = dinPin;
	_clkPin = clkPin;
	_csPin = csPin;
 _devicesX = devicesX;
 _devicesY = devicesY;
	_numDevices = devicesX * devicesY;
 _font = 1;
 maxRow = devicesY * 8 - 1;
 maxCol = devicesX * 8 - 1;
	frameBuffer = newuint8_t[_numDevices * 8];
pinMode(_clkPin, OUTPUT);
pinMode(_csPin, OUTPUT);
pinMode(_dinPin, OUTPUT);
digitalWrite(_clkPin, HIGH);
digitalWrite(_csPin, HIGH);
digitalWrite(_dinPin, HIGH);
}

voidLED_Matrix::begin(void) {
for (unsignedint address=0; address < _numDevices; address++) {
displayTest(address, false);
write2device(address, MAX7219_SHUTDOWN, 0x01);
write2device(address, MAX7219_DECODE_MODE, 0x00);
write2device(address, MAX7219_SCAN_LIMIT, 0x07);
write2device(address, MAX7219_INTENSITY, 0x03);
// clear the display
 }
clear();
display();
}

voidLED_Matrix::setFont(uint8_t font) {
 _font = font;
}

voidLED_Matrix::on(void) {
for (unsignedint address=0; address < _numDevices; address++) {
write2device(address, MAX7219_SHUTDOWN, 0x01);
 }
}
voidLED_Matrix::off(void) {
for (unsignedint address=0; address < _numDevices; address++) {
write2device(address, MAX7219_SHUTDOWN, 0x00);
 }
}

voidLED_Matrix::setIntensity(uint8_t intensity) {
 _intensity = intensity;
for (unsignedint address=0; address < _numDevices; address++) {
write2device(address, MAX7219_INTENSITY, _intensity);
 }
}

unsignedintLED_Matrix::getNumDevicesX(void) {
return _devicesX;
}

unsignedintLED_Matrix::getNumDevicesY(void) {
return _devicesY;
}

voidLED_Matrix::clear(void) {
// delete framebuffer
for (unsignedint fb_addr=0; fb_addr<(_numDevices*8); fb_addr++) {
 frameBuffer[fb_addr]=0;
 }
}

voidLED_Matrix::clear(unsignedint x0, unsignedint y0, unsignedint x1, unsignedint y1) {
/* for (int address=0; address < _numDevices; address++) {
	displayTest(address, false);
 write2device(address, MAX7219_SHUTDOWN, 0x01);
 write2device(address, MAX7219_DECODE_MODE, 0x00);
 write2device(address, MAX7219_SCAN_LIMIT, 0x07);
 write2device(address, MAX7219_INTENSITY, _intensity);
 } */
for(unsignedint x=x0; x<=x1; x++) {
for(unsignedint y=y0; y<=y1; y++) {
setPixel(x,y,false);
 }
 }
}

voidLED_Matrix::display(void) {
for (unsignedint address=0; address < _numDevices; address++) {
for (uint8_t row=1; row < 9; row++) {
write2device(address, row, frameBuffer[ (8*address) + row - 1 ]);
#ifdef ESP8266
delay(0);
#endif
	}
 }
}

unsignedlongLED_Matrix::getFBaddr(unsignedint col, unsignedint row) {
if ( col <= maxCol && row <= maxRow ) {
unsignedint segmentX=(unsignedint)col/8;
unsignedint segmentY=(unsignedint)row/8;
unsignedint segment=(segmentY*_devicesX)+segmentX;
uint8_t colInSegment=(segmentX*8)+7-col;
uint8_t rowInSegment=row-(segmentY*8);
// frameBuffer address is 8*Segment+rowInSegment
return (((unsignedint)8*segment+rowInSegment)<<8) | colInSegment;
 } else {
return0xFFFFFFFF;
 }
}

voidLED_Matrix::setCursor(unsignedint col, unsignedint row) {
if ( col <= maxCol && row <= maxRow ) {
 aktRow = row;
 aktCol = col;
 }
}

unsignedintLED_Matrix::getSize(char* text){
unsignedint retval=0;
uint8_t letter_size;
for( int i=0; i < (int)strlen(text); i++) {
if (text[i] > 31 && text[i] < 127) {
 letter_size = pgm_read_byte(&myFont7x6[text[i] - 32][FONT_SIZE-1]);
switch (_font) {
case1:
 retval += letter_size;
break;
case2:
 retval += 5;
break;
 }
 }
 }
 retval += strlen(text)-1;
return retval;
}

voidLED_Matrix::setPixel(unsignedint col, unsignedint row, bool val) {
unsignedlong FB_addr_raw=getFBaddr(col, row);
if (FB_addr_raw < 0xFFFFFFFF) {
uint8_t colInSegment = (uint8_t)(FB_addr_raw & 0xFF);
unsignedint FB_addr = (FB_addr_raw >> 8);
if (val) {
// set a pixel
 frameBuffer[FB_addr]=frameBuffer[FB_addr] | (0x01 << colInSegment);
 } else {
//delete a pixel
 frameBuffer[FB_addr]=frameBuffer[FB_addr] & ~(0x01 << colInSegment);
 }
 }
}

boolLED_Matrix::getPixel(unsignedint col, unsignedint row) {
unsignedint FB_addr_raw=getFBaddr(col, row);
if (FB_addr_raw < 0xFFFFFFFF) {
uint8_t colInSegment = (uint8_t)(FB_addr_raw & 0x000000FF);
unsignedint FB_addr = (unsignedint)(FB_addr_raw >> 8);
return frameBuffer[FB_addr] & (0x01 << colInSegment);
 } else {
returnfalse;
 }
}

size_tLED_Matrix::write(constuint8_t *buffer, size_t size) {
for (int i=0; i < (int)size; i++) {
write(buffer[i]);
 }
return size;
}

size_tLED_Matrix::write(uint8_t c) {
//printf_P("#0");
size_t retval = 0;
uint8_t res = 255;
uint8_t mybit;
uint8_t letter_size;
uint8_t font_size = 5;
// CF und LF sorgen für Zeilenumbruch
//	if (c == 10 || c == 13) {
if (c == 10 ) {
setCursor(0,aktRow+8);
 }
if (c > 31 && c < 127) {
 letter_size = pgm_read_byte(&myFont7x6[c - 32][FONT_SIZE-1]);
switch (_font) {
case1:
 font_size = letter_size;
break;
case2:
 font_size = 5;
break;
 }
 retval = 1;
if (aktCol <= maxCol && aktRow <= maxRow) {
if (_font == 2 && letter_size < 4) {
for ( int srow=0; srow < 8; srow++) {
setPixel(aktCol, aktRow + srow, false);
 }
 aktCol++;
 font_size--;
 }
if (_font == 2 && letter_size < 3) {
for ( int srow=0; srow < 8; srow++) {
setPixel(aktCol, aktRow + srow, false);
 }
 aktCol++;
 font_size--;
 }
for ( int i=0; i < letter_size; i++) {
if (i < letter_size) {
 res=pgm_read_byte(&myFont7x6[c - 32][i]);
 } else {
 res=0;
 }
 mybit=0x01;
for ( int srow=0; srow < 8; srow++) {
setPixel(aktCol+i, aktRow + srow, res & ( mybit << srow));
 }
 }
 }
 aktCol = aktCol + font_size + 1;
if ( aktCol >= maxCol ) {
 aktCol=0;
 aktRow=aktRow+8;
 }
	}
#ifdef ESP8266
delay(0);
#endif
return retval;
}

voidLED_Matrix::scrollDisplay(scrollDir dir) {
switch (dir) {
case scrollDir::scrollUp:
case scrollDir::scrollDown:
scrollDisplay(dir, 0, maxCol);
break;
case scrollDir::scrollLeft:
case scrollDir::scrollRight:
scrollDisplay(dir, 0, maxRow);
break;
 }
}

voidLED_Matrix::scrollDisplay(scrollDir dir, unsignedint first, unsignedint last) {
switch (dir) {
case scrollDir::scrollUp:
case scrollDir::scrollDown:
scrollDisplay(dir, first, 0, last, maxRow);
break;
case scrollDir::scrollLeft:
case scrollDir::scrollRight:
scrollDisplay(dir, 0, first, maxCol, last);
break;
 }
}

voidLED_Matrix::scrollDisplay(scrollDir dir, unsignedint firstX, unsignedint firstY, unsignedint lastX, unsignedint lastY) {
if (firstX > maxCol) firstX = maxCol;
if (lastX > maxCol) lastX = maxCol;
if (firstY > maxRow) firstY = maxRow;
if (lastY > maxRow) lastY = maxRow;
switch (dir) {
case scrollDir::scrollUp:
 {
for (unsignedint y = firstY; y <= lastY ; y++) {
for (unsignedint x = firstX; x <= lastX; x++) {
setPixel(x,y,getPixel(x,y+1));
#ifdef ESP8266
delay(0);
#endif
 }
 }
for (unsignedint x = firstX; x <= lastX; x++) {
setPixel(x,lastY,false);
 }
 }
break;
case scrollDir::scrollDown:
 {
for (unsignedint y = lastY; y > firstY; y--) {
for (unsignedint x = firstX; x <= lastX; x++) {
setPixel(x,y,getPixel(x,y-1));
#ifdef ESP8266
delay(0);
#endif
 }
 }
for (unsignedint x=firstX; x <= lastX; x++) {
setPixel(x,firstY,false);
 }
 }
break;
case scrollDir::scrollLeft:
 {
for (unsignedint y = firstY; y <= lastY; y++) {
for (unsignedint x = firstX; x < lastX; x++) {
setPixel(x,y,getPixel(x+1,y));
#ifdef ESP8266
delay(0);
#endif
 }
 }
for (unsignedint y=firstY; y <= lastY; y++) {
setPixel(lastX,y,false);
 }
 }
break;
case scrollDir::scrollRight:
 {
for (unsignedint y = firstY; y <= lastY; y++) {
for (unsignedint x = lastX; x > firstX; x--) {
setPixel(x,y,getPixel(x-1,y));
#ifdef ESP8266
delay(0);
#endif
 }
 }
for (unsignedint y = firstY; y <= lastY; y++) {
setPixel(firstX,y,false);
 }
 }
break;
	}
}


voidLED_Matrix::displayTest(unsignedint deviceNumber, bool state) {
if (state) {
write2device(deviceNumber, MAX7219_DISPLAY_TEST, 0x01);
 } else {
write2device(deviceNumber, MAX7219_DISPLAY_TEST, 0x00);
 }
}

voidLED_Matrix::write2device(unsignedint deviceNumber, uint8_t max_reg, uint8_t max_data) {
digitalWrite(_csPin, LOW);
for (unsignedint address=0; address < _numDevices; address++) {
if ( address == deviceNumber) {
shiftOut(_dinPin, _clkPin, MSBFIRST, max_reg);
shiftOut(_dinPin, _clkPin, MSBFIRST, max_data);
 } else {
shiftOut(_dinPin, _clkPin, MSBFIRST, MAX7219_NOP);
shiftOut(_dinPin, _clkPin, MSBFIRST, 0x00);
 }
 }
// delay(1);
digitalWrite(_csPin, HIGH);
}