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LoRa_APRS_iGate/backup/OLEDDisplay.cpp

1046 wiersze
29 KiB
C++
Czysty Zwykły widok Historia

adding display support and many other stuff
2021-01-30 21:47:24 +00:00
/**
* The MIT License (MIT)
*
* Copyright (c) 2018 by ThingPulse, Daniel Eichhorn
* Copyright (c) 2018 by Fabrice Weinberg
* Copyright (c) 2019 by Helmut Tschemernjak - www.radioshuttle.de
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* ThingPulse invests considerable time and money to develop these open source libraries.
* Please support us by buying our products (and not the clones) from
* https://thingpulse.com
*
*/
/*
* TODO Helmut
* - test/finish dislplay.printf() on mbed-os
* - Finish _putc with drawLogBuffer when running display
*/
#include "OLEDDisplay.h"
OLEDDisplay::OLEDDisplay() {
displayWidth = 128;
displayHeight = 64;
displayBufferSize = displayWidth * displayHeight / 8;
color = WHITE;
geometry = GEOMETRY_128_64;
textAlignment = TEXT_ALIGN_LEFT;
fontData = ArialMT_Plain_10;
fontTableLookupFunction = DefaultFontTableLookup;
buffer = NULL;
#ifdef OLEDDISPLAY_DOUBLE_BUFFER
buffer_back = NULL;
#endif
}
OLEDDisplay::~OLEDDisplay() {
end();
}
bool OLEDDisplay::allocateBuffer() {
logBufferSize = 0;
logBufferFilled = 0;
logBufferLine = 0;
logBufferMaxLines = 0;
logBuffer = NULL;
if (!this->connect()) {
DEBUG_OLEDDISPLAY("[OLEDDISPLAY][init] Can't establish connection to display\n");
return false;
}
if(this->buffer==NULL) {
this->buffer = (uint8_t*) malloc((sizeof(uint8_t) * displayBufferSize) + BufferOffset);
this->buffer += BufferOffset;
if(!this->buffer) {
DEBUG_OLEDDISPLAY("[OLEDDISPLAY][init] Not enough memory to create display\n");
return false;
}
}
#ifdef OLEDDISPLAY_DOUBLE_BUFFER
if(this->buffer_back==NULL) {
this->buffer_back = (uint8_t*) malloc((sizeof(uint8_t) * displayBufferSize) + BufferOffset);
this->buffer_back += BufferOffset;
if(!this->buffer_back) {
DEBUG_OLEDDISPLAY("[OLEDDISPLAY][init] Not enough memory to create back buffer\n");
free(this->buffer - BufferOffset);
return false;
}
}
#endif
return true;
}
bool OLEDDisplay::init() {
BufferOffset = getBufferOffset();
if(!allocateBuffer()) {
return false;
}
sendInitCommands();
resetDisplay();
return true;
}
void OLEDDisplay::end() {
if (this->buffer) { free(this->buffer - BufferOffset); this->buffer = NULL; }
#ifdef OLEDDISPLAY_DOUBLE_BUFFER
if (this->buffer_back) { free(this->buffer_back - BufferOffset); this->buffer_back = NULL; }
#endif
if (this->logBuffer != NULL) { free(this->logBuffer); this->logBuffer = NULL; }
}
void OLEDDisplay::resetDisplay(void) {
clear();
#ifdef OLEDDISPLAY_DOUBLE_BUFFER
memset(buffer_back, 1, displayBufferSize);
#endif
display();
}
void OLEDDisplay::setColor(OLEDDISPLAY_COLOR color) {
this->color = color;
}
OLEDDISPLAY_COLOR OLEDDisplay::getColor() {
return this->color;
}
void OLEDDisplay::setPixel(int16_t x, int16_t y) {
if (x >= 0 && x < this->width() && y >= 0 && y < this->height()) {
switch (color) {
case WHITE: buffer[x + (y / 8) * this->width()] |= (1 << (y & 7)); break;
case BLACK: buffer[x + (y / 8) * this->width()] &= ~(1 << (y & 7)); break;
case INVERSE: buffer[x + (y / 8) * this->width()] ^= (1 << (y & 7)); break;
}
}
}
void OLEDDisplay::setPixelColor(int16_t x, int16_t y, OLEDDISPLAY_COLOR color) {
if (x >= 0 && x < this->width() && y >= 0 && y < this->height()) {
switch (color) {
case WHITE: buffer[x + (y / 8) * this->width()] |= (1 << (y & 7)); break;
case BLACK: buffer[x + (y / 8) * this->width()] &= ~(1 << (y & 7)); break;
case INVERSE: buffer[x + (y / 8) * this->width()] ^= (1 << (y & 7)); break;
}
}
}
void OLEDDisplay::clearPixel(int16_t x, int16_t y) {
if (x >= 0 && x < this->width() && y >= 0 && y < this->height()) {
switch (color) {
case BLACK: buffer[x + (y >> 3) * this->width()] |= (1 << (y & 7)); break;
case WHITE: buffer[x + (y >> 3) * this->width()] &= ~(1 << (y & 7)); break;
case INVERSE: buffer[x + (y >> 3) * this->width()] ^= (1 << (y & 7)); break;
}
}
}
// Bresenham's algorithm - thx wikipedia and Adafruit_GFX
void OLEDDisplay::drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1) {
int16_t steep = abs(y1 - y0) > abs(x1 - x0);
if (steep) {
_swap_int16_t(x0, y0);
_swap_int16_t(x1, y1);
}
if (x0 > x1) {
_swap_int16_t(x0, x1);
_swap_int16_t(y0, y1);
}
int16_t dx, dy;
dx = x1 - x0;
dy = abs(y1 - y0);
int16_t err = dx / 2;
int16_t ystep;
if (y0 < y1) {
ystep = 1;
} else {
ystep = -1;
}
for (; x0<=x1; x0++) {
if (steep) {
setPixel(y0, x0);
} else {
setPixel(x0, y0);
}
err -= dy;
if (err < 0) {
y0 += ystep;
err += dx;
}
}
}
void OLEDDisplay::drawRect(int16_t x, int16_t y, int16_t width, int16_t height) {
drawHorizontalLine(x, y, width);
drawVerticalLine(x, y, height);
drawVerticalLine(x + width - 1, y, height);
drawHorizontalLine(x, y + height - 1, width);
}
void OLEDDisplay::fillRect(int16_t xMove, int16_t yMove, int16_t width, int16_t height) {
for (int16_t x = xMove; x < xMove + width; x++) {
drawVerticalLine(x, yMove, height);
}
}
void OLEDDisplay::drawCircle(int16_t x0, int16_t y0, int16_t radius) {
int16_t x = 0, y = radius;
int16_t dp = 1 - radius;
do {
if (dp < 0)
dp = dp + (x++) * 2 + 3;
else
dp = dp + (x++) * 2 - (y--) * 2 + 5;
setPixel(x0 + x, y0 + y); //For the 8 octants
setPixel(x0 - x, y0 + y);
setPixel(x0 + x, y0 - y);
setPixel(x0 - x, y0 - y);
setPixel(x0 + y, y0 + x);
setPixel(x0 - y, y0 + x);
setPixel(x0 + y, y0 - x);
setPixel(x0 - y, y0 - x);
} while (x < y);
setPixel(x0 + radius, y0);
setPixel(x0, y0 + radius);
setPixel(x0 - radius, y0);
setPixel(x0, y0 - radius);
}
void OLEDDisplay::drawCircleQuads(int16_t x0, int16_t y0, int16_t radius, uint8_t quads) {
int16_t x = 0, y = radius;
int16_t dp = 1 - radius;
while (x < y) {
if (dp < 0)
dp = dp + (x++) * 2 + 3;
else
dp = dp + (x++) * 2 - (y--) * 2 + 5;
if (quads & 0x1) {
setPixel(x0 + x, y0 - y);
setPixel(x0 + y, y0 - x);
}
if (quads & 0x2) {
setPixel(x0 - y, y0 - x);
setPixel(x0 - x, y0 - y);
}
if (quads & 0x4) {
setPixel(x0 - y, y0 + x);
setPixel(x0 - x, y0 + y);
}
if (quads & 0x8) {
setPixel(x0 + x, y0 + y);
setPixel(x0 + y, y0 + x);
}
}
if (quads & 0x1 && quads & 0x8) {
setPixel(x0 + radius, y0);
}
if (quads & 0x4 && quads & 0x8) {
setPixel(x0, y0 + radius);
}
if (quads & 0x2 && quads & 0x4) {
setPixel(x0 - radius, y0);
}
if (quads & 0x1 && quads & 0x2) {
setPixel(x0, y0 - radius);
}
}
void OLEDDisplay::fillCircle(int16_t x0, int16_t y0, int16_t radius) {
int16_t x = 0, y = radius;
int16_t dp = 1 - radius;
do {
if (dp < 0)
dp = dp + (x++) * 2 + 3;
else
dp = dp + (x++) * 2 - (y--) * 2 + 5;
drawHorizontalLine(x0 - x, y0 - y, 2*x);
drawHorizontalLine(x0 - x, y0 + y, 2*x);
drawHorizontalLine(x0 - y, y0 - x, 2*y);
drawHorizontalLine(x0 - y, y0 + x, 2*y);
} while (x < y);
drawHorizontalLine(x0 - radius, y0, 2 * radius);
}
void OLEDDisplay::drawHorizontalLine(int16_t x, int16_t y, int16_t length) {
if (y < 0 || y >= this->height()) { return; }
if (x < 0) {
length += x;
x = 0;
}
if ( (x + length) > this->width()) {
length = (this->width() - x);
}
if (length <= 0) { return; }
uint8_t * bufferPtr = buffer;
bufferPtr += (y >> 3) * this->width();
bufferPtr += x;
uint8_t drawBit = 1 << (y & 7);
switch (color) {
case WHITE: while (length--) {
*bufferPtr++ |= drawBit;
}; break;
case BLACK: drawBit = ~drawBit; while (length--) {
*bufferPtr++ &= drawBit;
}; break;
case INVERSE: while (length--) {
*bufferPtr++ ^= drawBit;
}; break;
}
}
void OLEDDisplay::drawVerticalLine(int16_t x, int16_t y, int16_t length) {
if (x < 0 || x >= this->width()) return;
if (y < 0) {
length += y;
y = 0;
}
if ( (y + length) > this->height()) {
length = (this->height() - y);
}
if (length <= 0) return;
uint8_t yOffset = y & 7;
uint8_t drawBit;
uint8_t *bufferPtr = buffer;
bufferPtr += (y >> 3) * this->width();
bufferPtr += x;
if (yOffset) {
yOffset = 8 - yOffset;
drawBit = ~(0xFF >> (yOffset));
if (length < yOffset) {
drawBit &= (0xFF >> (yOffset - length));
}
switch (color) {
case WHITE: *bufferPtr |= drawBit; break;
case BLACK: *bufferPtr &= ~drawBit; break;
case INVERSE: *bufferPtr ^= drawBit; break;
}
if (length < yOffset) return;
length -= yOffset;
bufferPtr += this->width();
}
if (length >= 8) {
switch (color) {
case WHITE:
case BLACK:
drawBit = (color == WHITE) ? 0xFF : 0x00;
do {
*bufferPtr = drawBit;
bufferPtr += this->width();
length -= 8;
} while (length >= 8);
break;
case INVERSE:
do {
*bufferPtr = ~(*bufferPtr);
bufferPtr += this->width();
length -= 8;
} while (length >= 8);
break;
}
}
if (length > 0) {
drawBit = (1 << (length & 7)) - 1;
switch (color) {
case WHITE: *bufferPtr |= drawBit; break;
case BLACK: *bufferPtr &= ~drawBit; break;
case INVERSE: *bufferPtr ^= drawBit; break;
}
}
}
void OLEDDisplay::drawProgressBar(uint16_t x, uint16_t y, uint16_t width, uint16_t height, uint8_t progress) {
uint16_t radius = height / 2;
uint16_t xRadius = x + radius;
uint16_t yRadius = y + radius;
uint16_t doubleRadius = 2 * radius;
uint16_t innerRadius = radius - 2;
setColor(WHITE);
drawCircleQuads(xRadius, yRadius, radius, 0b00000110);
drawHorizontalLine(xRadius, y, width - doubleRadius + 1);
drawHorizontalLine(xRadius, y + height, width - doubleRadius + 1);
drawCircleQuads(x + width - radius, yRadius, radius, 0b00001001);
uint16_t maxProgressWidth = (width - doubleRadius + 1) * progress / 100;
fillCircle(xRadius, yRadius, innerRadius);
fillRect(xRadius + 1, y + 2, maxProgressWidth, height - 3);
fillCircle(xRadius + maxProgressWidth, yRadius, innerRadius);
}
void OLEDDisplay::drawFastImage(int16_t xMove, int16_t yMove, int16_t width, int16_t height, const uint8_t *image) {
drawInternal(xMove, yMove, width, height, image, 0, 0);
}
void OLEDDisplay::drawXbm(int16_t xMove, int16_t yMove, int16_t width, int16_t height, const uint8_t *xbm) {
int16_t widthInXbm = (width + 7) / 8;
uint8_t data = 0;
for(int16_t y = 0; y < height; y++) {
for(int16_t x = 0; x < width; x++ ) {
if (x & 7) {
data >>= 1; // Move a bit
} else { // Read new data every 8 bit
data = pgm_read_byte(xbm + (x / 8) + y * widthInXbm);
}
// if there is a bit draw it
if (data & 0x01) {
setPixel(xMove + x, yMove + y);
}
}
}
}
void OLEDDisplay::drawIco16x16(int16_t xMove, int16_t yMove, const char *ico, bool inverse) {
uint16_t data;
for(int16_t y = 0; y < 16; y++) {
data = pgm_read_byte(ico + (y << 1)) + (pgm_read_byte(ico + (y << 1) + 1) << 8);
for(int16_t x = 0; x < 16; x++ ) {
if ((data & 0x01) ^ inverse) {
setPixelColor(xMove + x, yMove + y, WHITE);
} else {
setPixelColor(xMove + x, yMove + y, BLACK);
}
data >>= 1; // Move a bit
}
}
}
void OLEDDisplay::drawStringInternal(int16_t xMove, int16_t yMove, char* text, uint16_t textLength, uint16_t textWidth) {
uint8_t textHeight = pgm_read_byte(fontData + HEIGHT_POS);
uint8_t firstChar = pgm_read_byte(fontData + FIRST_CHAR_POS);
uint16_t sizeOfJumpTable = pgm_read_byte(fontData + CHAR_NUM_POS) * JUMPTABLE_BYTES;
uint16_t cursorX = 0;
uint16_t cursorY = 0;
switch (textAlignment) {
case TEXT_ALIGN_CENTER_BOTH:
yMove -= textHeight >> 1;
// Fallthrough
case TEXT_ALIGN_CENTER:
xMove -= textWidth >> 1; // divide by 2
break;
case TEXT_ALIGN_RIGHT:
xMove -= textWidth;
break;
case TEXT_ALIGN_LEFT:
break;
}
// Don't draw anything if it is not on the screen.
if (xMove + textWidth < 0 || xMove > this->width() ) {return;}
if (yMove + textHeight < 0 || yMove > this->width() ) {return;}
for (uint16_t j = 0; j < textLength; j++) {
int16_t xPos = xMove + cursorX;
int16_t yPos = yMove + cursorY;
uint8_t code = text[j];
if (code >= firstChar) {
uint8_t charCode = code - firstChar;
// 4 Bytes per char code
uint8_t msbJumpToChar = pgm_read_byte( fontData + JUMPTABLE_START + charCode * JUMPTABLE_BYTES ); // MSB \ JumpAddress
uint8_t lsbJumpToChar = pgm_read_byte( fontData + JUMPTABLE_START + charCode * JUMPTABLE_BYTES + JUMPTABLE_LSB); // LSB /
uint8_t charByteSize = pgm_read_byte( fontData + JUMPTABLE_START + charCode * JUMPTABLE_BYTES + JUMPTABLE_SIZE); // Size
uint8_t currentCharWidth = pgm_read_byte( fontData + JUMPTABLE_START + charCode * JUMPTABLE_BYTES + JUMPTABLE_WIDTH); // Width
// Test if the char is drawable
if (!(msbJumpToChar == 255 && lsbJumpToChar == 255)) {
// Get the position of the char data
uint16_t charDataPosition = JUMPTABLE_START + sizeOfJumpTable + ((msbJumpToChar << 8) + lsbJumpToChar);
drawInternal(xPos, yPos, currentCharWidth, textHeight, fontData, charDataPosition, charByteSize);
}
cursorX += currentCharWidth;
}
}
}
void OLEDDisplay::drawString(int16_t xMove, int16_t yMove, String strUser) {
uint16_t lineHeight = pgm_read_byte(fontData + HEIGHT_POS);
// char* text must be freed!
char* text = utf8ascii(strUser);
uint16_t yOffset = 0;
// If the string should be centered vertically too
// we need to now how heigh the string is.
if (textAlignment == TEXT_ALIGN_CENTER_BOTH) {
uint16_t lb = 0;
// Find number of linebreaks in text
for (uint16_t i=0;text[i] != 0; i++) {
lb += (text[i] == 10);
}
// Calculate center
yOffset = (lb * lineHeight) / 2;
}
uint16_t line = 0;
char* textPart = strtok(text,"\n");
while (textPart != NULL) {
uint16_t length = strlen(textPart);
drawStringInternal(xMove, yMove - yOffset + (line++) * lineHeight, textPart, length, getStringWidth(textPart, length));
textPart = strtok(NULL, "\n");
}
free(text);
}
void OLEDDisplay::drawStringf( int16_t x, int16_t y, char* buffer, String format, ... )
{
va_list myargs;
va_start(myargs, format);
vsprintf(buffer, format.c_str(), myargs);
va_end(myargs);
drawString( x, y, buffer );
}
void OLEDDisplay::drawStringMaxWidth(int16_t xMove, int16_t yMove, uint16_t maxLineWidth, String strUser) {
uint16_t firstChar = pgm_read_byte(fontData + FIRST_CHAR_POS);
uint16_t lineHeight = pgm_read_byte(fontData + HEIGHT_POS);
char* text = utf8ascii(strUser);
uint16_t length = strlen(text);
uint16_t lastDrawnPos = 0;
uint16_t lineNumber = 0;
uint16_t strWidth = 0;
uint16_t preferredBreakpoint = 0;
uint16_t widthAtBreakpoint = 0;
for (uint16_t i = 0; i < length; i++) {
strWidth += pgm_read_byte(fontData + JUMPTABLE_START + (text[i] - firstChar) * JUMPTABLE_BYTES + JUMPTABLE_WIDTH);
// Always try to break on a space or dash
if (text[i] == ' ' || text[i]== '-') {
preferredBreakpoint = i;
widthAtBreakpoint = strWidth;
}
if (strWidth >= maxLineWidth) {
if (preferredBreakpoint == 0) {
preferredBreakpoint = i;
widthAtBreakpoint = strWidth;
}
drawStringInternal(xMove, yMove + (lineNumber++) * lineHeight , &text[lastDrawnPos], preferredBreakpoint - lastDrawnPos, widthAtBreakpoint);
lastDrawnPos = preferredBreakpoint + 1;
// It is possible that we did not draw all letters to i so we need
// to account for the width of the chars from `i - preferredBreakpoint`
// by calculating the width we did not draw yet.
strWidth = strWidth - widthAtBreakpoint;
preferredBreakpoint = 0;
}
}
// Draw last part if needed
if (lastDrawnPos < length) {
drawStringInternal(xMove, yMove + lineNumber * lineHeight , &text[lastDrawnPos], length - lastDrawnPos, getStringWidth(&text[lastDrawnPos], length - lastDrawnPos));
}
free(text);
}
uint16_t OLEDDisplay::getStringWidth(const char* text, uint16_t length) {
uint16_t firstChar = pgm_read_byte(fontData + FIRST_CHAR_POS);
uint16_t stringWidth = 0;
uint16_t maxWidth = 0;
while (length--) {
stringWidth += pgm_read_byte(fontData + JUMPTABLE_START + (text[length] - firstChar) * JUMPTABLE_BYTES + JUMPTABLE_WIDTH);
if (text[length] == 10) {
maxWidth = max(maxWidth, stringWidth);
stringWidth = 0;
}
}
return max(maxWidth, stringWidth);
}
uint16_t OLEDDisplay::getStringWidth(String strUser) {
char* text = utf8ascii(strUser);
uint16_t length = strlen(text);
uint16_t width = getStringWidth(text, length);
free(text);
return width;
}
void OLEDDisplay::setTextAlignment(OLEDDISPLAY_TEXT_ALIGNMENT textAlignment) {
this->textAlignment = textAlignment;
}
void OLEDDisplay::setFont(const uint8_t *fontData) {
this->fontData = fontData;
}
void OLEDDisplay::displayOn(void) {
sendCommand(DISPLAYON);
}
void OLEDDisplay::displayOff(void) {
sendCommand(DISPLAYOFF);
}
void OLEDDisplay::invertDisplay(void) {
sendCommand(INVERTDISPLAY);
}
void OLEDDisplay::normalDisplay(void) {
sendCommand(NORMALDISPLAY);
}
void OLEDDisplay::setContrast(uint8_t contrast, uint8_t precharge, uint8_t comdetect) {
sendCommand(SETPRECHARGE); //0xD9
sendCommand(precharge); //0xF1 default, to lower the contrast, put 1-1F
sendCommand(SETCONTRAST);
sendCommand(contrast); // 0-255
sendCommand(SETVCOMDETECT); //0xDB, (additionally needed to lower the contrast)
sendCommand(comdetect); //0x40 default, to lower the contrast, put 0
sendCommand(DISPLAYALLON_RESUME);
sendCommand(NORMALDISPLAY);
sendCommand(DISPLAYON);
}
void OLEDDisplay::setBrightness(uint8_t brightness) {
uint8_t contrast = brightness;
if (brightness < 128) {
// Magic values to get a smooth/ step-free transition
contrast = brightness * 1.171;
} else {
contrast = brightness * 1.171 - 43;
}
uint8_t precharge = 241;
if (brightness == 0) {
precharge = 0;
}
uint8_t comdetect = brightness / 8;
setContrast(contrast, precharge, comdetect);
}
void OLEDDisplay::resetOrientation() {
sendCommand(SEGREMAP);
sendCommand(COMSCANINC); //Reset screen rotation or mirroring
}
void OLEDDisplay::flipScreenVertically() {
sendCommand(SEGREMAP | 0x01);
sendCommand(COMSCANDEC); //Rotate screen 180 Deg
}
void OLEDDisplay::mirrorScreen() {
sendCommand(SEGREMAP);
sendCommand(COMSCANDEC); //Mirror screen
}
void OLEDDisplay::clear(void) {
memset(buffer, 0, displayBufferSize);
}
void OLEDDisplay::drawLogBuffer(uint16_t xMove, uint16_t yMove) {
uint16_t lineHeight = pgm_read_byte(fontData + HEIGHT_POS);
// Always align left
setTextAlignment(TEXT_ALIGN_LEFT);
// State values
uint16_t length = 0;
uint16_t line = 0;
uint16_t lastPos = 0;
for (uint16_t i=0;i<this->logBufferFilled;i++){
// Everytime we have a \n print
if (this->logBuffer[i] == 10) {
length++;
// Draw string on line `line` from lastPos to length
// Passing 0 as the lenght because we are in TEXT_ALIGN_LEFT
drawStringInternal(xMove, yMove + (line++) * lineHeight, &this->logBuffer[lastPos], length, 0);
// Remember last pos
lastPos = i;
// Reset length
length = 0;
} else {
// Count chars until next linebreak
length++;
}
}
// Draw the remaining string
if (length > 0) {
drawStringInternal(xMove, yMove + line * lineHeight, &this->logBuffer[lastPos], length, 0);
}
}
uint16_t OLEDDisplay::getWidth(void) {
return displayWidth;
}
uint16_t OLEDDisplay::getHeight(void) {
return displayHeight;
}
bool OLEDDisplay::setLogBuffer(uint16_t lines, uint16_t chars){
if (logBuffer != NULL) free(logBuffer);
uint16_t size = lines * chars;
if (size > 0) {
this->logBufferLine = 0; // Lines printed
this->logBufferFilled = 0; // Nothing stored yet
this->logBufferMaxLines = lines; // Lines max printable
this->logBufferSize = size; // Total number of characters the buffer can hold
this->logBuffer = (char *) malloc(size * sizeof(uint8_t));
if(!this->logBuffer) {
DEBUG_OLEDDISPLAY("[OLEDDISPLAY][setLogBuffer] Not enough memory to create log buffer\n");
return false;
}
}
return true;
}
size_t OLEDDisplay::write(uint8_t c) {
if (this->logBufferSize > 0) {
// Don't waste space on \r\n line endings, dropping \r
if (c == 13) return 1;
// convert UTF-8 character to font table index
c = (this->fontTableLookupFunction)(c);
// drop unknown character
if (c == 0) return 1;
bool maxLineNotReached = this->logBufferLine < this->logBufferMaxLines;
bool bufferNotFull = this->logBufferFilled < this->logBufferSize;
// Can we write to the buffer?
if (bufferNotFull && maxLineNotReached) {
this->logBuffer[logBufferFilled] = c;
this->logBufferFilled++;
// Keep track of lines written
if (c == 10) this->logBufferLine++;
} else {
// Max line number is reached
if (!maxLineNotReached) this->logBufferLine--;
// Find the end of the first line
uint16_t firstLineEnd = 0;
for (uint16_t i=0;i<this->logBufferFilled;i++) {
if (this->logBuffer[i] == 10){
// Include last char too
firstLineEnd = i + 1;
break;
}
}
// If there was a line ending
if (firstLineEnd > 0) {
// Calculate the new logBufferFilled value
this->logBufferFilled = logBufferFilled - firstLineEnd;
// Now we move the lines infront of the buffer
memcpy(this->logBuffer, &this->logBuffer[firstLineEnd], logBufferFilled);
} else {
// Let's reuse the buffer if it was full
if (!bufferNotFull) {
this->logBufferFilled = 0;
}// else {
// Nothing to do here
//}
}
write(c);
}
}
// We are always writing all uint8_t to the buffer
return 1;
}
size_t OLEDDisplay::write(const char* str) {
if (str == NULL) return 0;
size_t length = strlen(str);
for (size_t i = 0; i < length; i++) {
write(str[i]);
}
return length;
}
#ifdef __MBED__
int OLEDDisplay::_putc(int c) {
if (!fontData)
return 1;
if (!logBufferSize) {
uint8_t textHeight = pgm_read_byte(fontData + HEIGHT_POS);
uint16_t lines = this->displayHeight / textHeight;
uint16_t chars = 2 * (this->displayWidth / textHeight);
if (this->displayHeight % textHeight)
lines++;
if (this->displayWidth % textHeight)
chars++;
setLogBuffer(lines, chars);
}
return this->write((uint8_t)c);
}
#endif
// Private functions
void OLEDDisplay::setGeometry(OLEDDISPLAY_GEOMETRY g, uint16_t width, uint16_t height) {
this->geometry = g;
switch (g) {
case GEOMETRY_128_64:
this->displayWidth = 128;
this->displayHeight = 64;
break;
case GEOMETRY_128_32:
this->displayWidth = 128;
this->displayHeight = 32;
break;
case GEOMETRY_64_48:
this->displayWidth = 64;
this->displayHeight = 48;
break;
case GEOMETRY_64_32:
this->displayWidth = 64;
this->displayHeight = 32;
break;
case GEOMETRY_RAWMODE:
this->displayWidth = width > 0 ? width : 128;
this->displayHeight = height > 0 ? height : 64;
break;
}
this->displayBufferSize = displayWidth * displayHeight / 8;
}
void OLEDDisplay::sendInitCommands(void) {
if (geometry == GEOMETRY_RAWMODE)
return;
sendCommand(DISPLAYOFF);
sendCommand(SETDISPLAYCLOCKDIV);
sendCommand(0xF0); // Increase speed of the display max ~96Hz
sendCommand(SETMULTIPLEX);
sendCommand(this->height() - 1);
sendCommand(SETDISPLAYOFFSET);
sendCommand(0x00);
if(geometry == GEOMETRY_64_32)
sendCommand(0x00);
else
sendCommand(SETSTARTLINE);
sendCommand(CHARGEPUMP);
sendCommand(0x14);
sendCommand(MEMORYMODE);
sendCommand(0x00);
sendCommand(SEGREMAP);
sendCommand(COMSCANINC);
sendCommand(SETCOMPINS);
if (geometry == GEOMETRY_128_64 || geometry == GEOMETRY_64_48 || geometry == GEOMETRY_64_32) {
sendCommand(0x12);
} else if (geometry == GEOMETRY_128_32) {
sendCommand(0x02);
}
sendCommand(SETCONTRAST);
if (geometry == GEOMETRY_128_64 || geometry == GEOMETRY_64_48 || geometry == GEOMETRY_64_32) {
sendCommand(0xCF);
} else if (geometry == GEOMETRY_128_32) {
sendCommand(0x8F);
}
sendCommand(SETPRECHARGE);
sendCommand(0xF1);
sendCommand(SETVCOMDETECT); //0xDB, (additionally needed to lower the contrast)
sendCommand(0x40); //0x40 default, to lower the contrast, put 0
sendCommand(DISPLAYALLON_RESUME);
sendCommand(NORMALDISPLAY);
sendCommand(0x2e); // stop scroll
sendCommand(DISPLAYON);
}
void OLEDDisplay::drawInternal(int16_t xMove, int16_t yMove, int16_t width, int16_t height, const uint8_t *data, uint16_t offset, uint16_t bytesInData) {
if (width < 0 || height < 0) return;
if (yMove + height < 0 || yMove > this->height()) return;
if (xMove + width < 0 || xMove > this->width()) return;
uint8_t rasterHeight = 1 + ((height - 1) >> 3); // fast ceil(height / 8.0)
int8_t yOffset = yMove & 7;
bytesInData = bytesInData == 0 ? width * rasterHeight : bytesInData;
int16_t initYMove = yMove;
int8_t initYOffset = yOffset;
for (uint16_t i = 0; i < bytesInData; i++) {
// Reset if next horizontal drawing phase is started.
if ( i % rasterHeight == 0) {
yMove = initYMove;
yOffset = initYOffset;
}
uint8_t currentByte = pgm_read_byte(data + offset + i);
int16_t xPos = xMove + (i / rasterHeight);
int16_t yPos = ((yMove >> 3) + (i % rasterHeight)) * this->width();
// int16_t yScreenPos = yMove + yOffset;
int16_t dataPos = xPos + yPos;
if (dataPos >= 0 && dataPos < displayBufferSize &&
xPos >= 0 && xPos < this->width() ) {
if (yOffset >= 0) {
switch (this->color) {
case WHITE: buffer[dataPos] |= currentByte << yOffset; break;
case BLACK: buffer[dataPos] &= ~(currentByte << yOffset); break;
case INVERSE: buffer[dataPos] ^= currentByte << yOffset; break;
}
if (dataPos < (displayBufferSize - this->width())) {
switch (this->color) {
case WHITE: buffer[dataPos + this->width()] |= currentByte >> (8 - yOffset); break;
case BLACK: buffer[dataPos + this->width()] &= ~(currentByte >> (8 - yOffset)); break;
case INVERSE: buffer[dataPos + this->width()] ^= currentByte >> (8 - yOffset); break;
}
}
} else {
// Make new offset position
yOffset = -yOffset;
switch (this->color) {
case WHITE: buffer[dataPos] |= currentByte >> yOffset; break;
case BLACK: buffer[dataPos] &= ~(currentByte >> yOffset); break;
case INVERSE: buffer[dataPos] ^= currentByte >> yOffset; break;
}
// Prepare for next iteration by moving one block up
yMove -= 8;
// and setting the new yOffset
yOffset = 8 - yOffset;
}
#ifndef __MBED__
yield();
#endif
}
}
}
// You need to free the char!
char* OLEDDisplay::utf8ascii(String str) {
uint16_t k = 0;
uint16_t length = str.length() + 1;
// Copy the string into a char array
char* s = (char*) malloc(length * sizeof(char));
if(!s) {
DEBUG_OLEDDISPLAY("[OLEDDISPLAY][utf8ascii] Can't allocate another char array. Drop support for UTF-8.\n");
return (char*) str.c_str();
}
str.toCharArray(s, length);
length--;
for (uint16_t i=0; i < length; i++) {
char c = (this->fontTableLookupFunction)(s[i]);
if (c!=0) {
s[k++]=c;
}
}
s[k]=0;
// This will leak 's' be sure to free it in the calling function.
return s;
}
void OLEDDisplay::setFontTableLookupFunction(FontTableLookupFunction function) {
this->fontTableLookupFunction = function;
}
char DefaultFontTableLookup(const uint8_t ch) {
// UTF-8 to font table index converter
// Code form http://playground.arduino.cc/Main/Utf8ascii
static uint8_t LASTCHAR;
if (ch < 128) { // Standard ASCII-set 0..0x7F handling
LASTCHAR = 0;
return ch;
}
uint8_t last = LASTCHAR; // get last char
LASTCHAR = ch;
switch (last) { // conversion depnding on first UTF8-character
case 0xC2: return (uint8_t) ch;
case 0xC3: return (uint8_t) (ch | 0xC0);
case 0x82: if (ch == 0xAC) return (uint8_t) 0x80; // special case Euro-symbol
}
return (uint8_t) 0; // otherwise: return zero, if character has to be ignored
}