Diff: Peripherals/N5110/N5110.cpp

Revision:

60:44ddfb791e2b

Parent:

59:fd4669864b67

--- a/Peripherals/N5110/N5110.cpp	Thu May 09 14:49:27 2019 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,530 +0,0 @@
-#include "mbed.h"
-#include "N5110.h"
-
-// overloaded constructor includes power pin - LCD Vcc connected to GPIO pin
-// this constructor works fine with LPC1768 - enough current sourced from GPIO
-// to power LCD. Doesn't work well with K64F.
-N5110::N5110(PinName const pwrPin,
-             PinName const scePin,
-             PinName const rstPin,
-             PinName const dcPin,
-             PinName const mosiPin,
-             PinName const sclkPin,
-             PinName const ledPin)
-    :
-    _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise
-    _led(new PwmOut(ledPin)),
-    _pwr(new DigitalOut(pwrPin)),
-    _sce(new DigitalOut(scePin)),
-    _rst(new DigitalOut(rstPin)),
-    _dc(new DigitalOut(dcPin))
-{}
-
-// overloaded constructor does not include power pin - LCD Vcc must be tied to +3V3
-// Best to use this with K64F as the GPIO hasn't sufficient output current to reliably
-// drive the LCD.
-N5110::N5110(PinName const scePin,
-             PinName const rstPin,
-             PinName const dcPin,
-             PinName const mosiPin,
-             PinName const sclkPin,
-             PinName const ledPin)
-    :
-    _spi(new SPI(mosiPin,NC,sclkPin)), // create new SPI instance and initialise
-    _led(new PwmOut(ledPin)),
-    _pwr(NULL), // pwr not needed so null it to be safe
-    _sce(new DigitalOut(scePin)),
-    _rst(new DigitalOut(rstPin)),
-    _dc(new DigitalOut(dcPin))
-{}
-
-N5110::~N5110()
-{
-    delete _spi;
-
-    if(_pwr) {
-        delete _pwr;
-    }
-
-    delete _led;
-    delete _sce;
-    delete _rst;
-    delete _dc;
-}
-
-// initialise function - powers up and sends the initialisation commands
-void N5110::init()
-{
-    turnOn();     // power up
-    reset();      // reset LCD - must be done within 100 ms
-    initSPI();    
-    
-    setContrast(0.55);  // this may need tuning (say 0.4 to 0.6)
-    setBias(3);   // datasheet - 48:1 mux - don't mess with if you don't know what you're doing! (0 to 7)
-    setTempCoefficient(0); // datasheet - may need increasing (range 0 to 3) at very low temperatures
-    normalMode();  // normal video mode by default
-    
-    clearRAM();      // RAM is undefined at power-up so clear to be sure
-    clear();   // clear buffer
-    setBrightness(0.5);
-}
-
-// sets normal video mode (black on white)
-void N5110::normalMode()
-{
-    sendCommand(0b00100000);   // basic instruction
-    sendCommand(0b00001100);  // normal video mode- datasheet
-}
-
-// sets normal video mode (white on black)
-void N5110::inverseMode()
-{
-    sendCommand(0b00100000);   // basic instruction
-    sendCommand(0b00001101);   // inverse video mode - datasheet
-}
-
-// function to power up the LCD and backlight - only works when using GPIO to power
-void N5110::turnOn()
-{
-    if (_pwr != NULL) {
-        _pwr->write(1);  // apply power
-    }
-}
-
-// function to power down LCD
-void N5110::turnOff()
-{
-    clear(); // clear buffer
-    refresh();
-    setBrightness(0.0);  // turn backlight off
-    clearRAM();   // clear RAM to ensure specified current consumption
-    // send command to ensure we are in basic mode
-    
-    sendCommand(0b00100000); // basic mode
-    sendCommand(0b00001000); // clear display
-    sendCommand(0b00100001); // extended mode
-    sendCommand(0b00100100); // power down
-    
-    // if we are powering the LCD using the GPIO then make it low to turn off
-    if (_pwr != NULL) {
-        wait_ms(10);  // small delay and then turn off the power pin
-        _pwr->write(0);  // turn off power
-    }
-
-}
-
-// function to change LED backlight brightness
-void N5110::setBrightness(float brightness)
-{
-    // check whether brightness is within range
-    if (brightness < 0.0f)
-        brightness = 0.0f;
-    if (brightness > 1.0f)
-        brightness = 1.0f;
-    // set PWM duty cycle
-    _led->write(brightness);
-}
-
-void N5110::setContrast(float contrast) {
-    
-    // enforce limits
-    if (contrast > 1.0f)
-        contrast = 1.0f;
-    else if (contrast < 0.0f)
-        contrast = 0.0;
-    
-    // convert to char in range 0 to 127 (i.e. 6 bits)
-    char ic = char(contrast*127.0f);
-    
-    sendCommand(0b00100001);  // extended instruction set
-    sendCommand(0b10000000 | ic);   // set Vop (which controls contrast)
-    sendCommand(0b00100000);  // back to basic instruction set
-}
-
-void N5110::setTempCoefficient(char tc) {
-    
-    // enforce limits
-    if (tc>3) {
-        tc=3;
-    }
-    
-    // temperature coefficient may need increasing at low temperatures
-
-    sendCommand(0b00100001);  // extended instruction set
-    sendCommand(0b00000100 | tc);
-    sendCommand(0b00100000);  // back to basic instruction set
-}
-    
-void N5110::setBias(char bias) {
-    
-    // from data sheet
-    // bias      mux rate
-    // 0        1:100
-    // 1        1:80
-    // 2        1:65
-    // 3        1:48   (default)
-    // 4        1:40/1:34
-    // 5        1:24
-    // 6        1:18/1:16
-    // 7        1:10/1:9/1:8
-    
-    // enforce limits
-    if (bias>7) {
-        bias=7;
-    }
-        
-    sendCommand(0b00100001);  // extended mode instruction
-    sendCommand(0b00010000 | bias);  
-    sendCommand(0b00100000); // end of extended mode instruction
-}
-
-// pulse the active low reset line
-void N5110::reset()
-{
-    _rst->write(0);  // reset the LCD
-    _rst->write(1);
-}
-
-// function to initialise SPI peripheral
-void N5110::initSPI()
-{
-    _spi->format(8,1);    // 8 bits, Mode 1 - polarity 0, phase 1 - base value of clock is 0, data captured on falling edge/propagated on rising edge
-    _spi->frequency(4000000);  // maximum of screen is 4 MHz
-}
-
-// send a command to the display
-void N5110::sendCommand(unsigned char command)
-{
-    _dc->write(0);  // set DC low for command
-    _sce->write(0); // set CE low to begin frame
-    _spi->write(command);  // send command
-    _dc->write(1);  // turn back to data by default
-    _sce->write(1); // set CE high to end frame (expected for transmission of single byte)
-}
-
-// send data to the display at the current XY address
-// dc is set to 1 (i.e. data) after sending a command and so should
-// be the default mode.
-void N5110::sendData(unsigned char data)
-{
-    _sce->write(0);   // set CE low to begin frame
-    _spi->write(data);
-    _sce->write(1);  // set CE high to end frame (expected for transmission of single byte)
-}
-
-// this function writes 0 to the 504 bytes to clear the RAM
-void N5110::clearRAM()
-{
-    _sce->write(0);  //set CE low to begin frame
-    for(int i = 0; i < WIDTH * HEIGHT; i++) { // 48 x 84 bits = 504 bytes
-        _spi->write(0x00);  // send 0's
-    }
-    _sce->write(1); // set CE high to end frame
-}
-
-// function to set the XY address in RAM for subsequenct data write
-void N5110::setXYAddress(unsigned int const x,
-                         unsigned int const y)
-{
-    if (x<WIDTH && y<HEIGHT) {  // check within range
-        sendCommand(0b00100000);  // basic instruction
-        sendCommand(0b10000000 | x);  // send addresses to display with relevant mask
-        sendCommand(0b01000000 | y);
-    }
-}
-
-// These functions are used to set, clear and get the value of pixels in the display
-// Pixels are addressed in the range of 0 to 47 (y) and 0 to 83 (x).  The refresh()
-// function must be called after set and clear in order to update the display
-void N5110::setPixel(unsigned int const x,
-                     unsigned int const y,
-                     bool const         state)
-{
-    if (x<WIDTH && y<HEIGHT) {  // check within range
-        // calculate bank and shift 1 to required position in the data byte
-        if(state) buffer[x][y/8] |= (1 << y%8);
-        else      buffer[x][y/8] &= ~(1 << y%8);
-    }
-}
-
-void N5110::clearPixel(unsigned int const x,
-                       unsigned int const y)
-{
-    if (x<WIDTH && y<HEIGHT) {  // check within range
-        // calculate bank and shift 1 to required position (using bit clear)
-        buffer[x][y/8] &= ~(1 << y%8);
-    }
-}
-
-int N5110::getPixel(unsigned int const x,
-                    unsigned int const y) const
-{
-    if (x<WIDTH && y<HEIGHT) {  // check within range
-        // return relevant bank and mask required bit
-
-        int pixel = (int) buffer[x][y/8] & (1 << y%8);
-
-        if (pixel)
-            return 1;
-        else
-            return 0;
-    }
-
-    return 0;
-
-}
-
-// function to refresh the display
-void N5110::refresh()
-{
-    setXYAddress(0,0);  // important to set address back to 0,0 before refreshing display
-    // address auto increments after printing string, so buffer[0][0] will not coincide
-    // with top-left pixel after priting string
-
-    _sce->write(0);  //set CE low to begin frame
-
-    for(int j = 0; j < BANKS; j++) {  // be careful to use correct order (j,i) for horizontal addressing
-        for(int i = 0; i < WIDTH; i++) {
-            _spi->write(buffer[i][j]);  // send buffer
-        }
-    }
-    _sce->write(1); // set CE high to end frame
-
-}
-
-// fills the buffer with random bytes.  Can be used to test the display.
-// The rand() function isn't seeded so it probably creates the same pattern everytime
-void N5110::randomiseBuffer()
-{
-    int i,j;
-    for(j = 0; j < BANKS; j++) {  // be careful to use correct order (j,i) for horizontal addressing
-        for(i = 0; i < WIDTH; i++) {
-            buffer[i][j] = rand()%256;  // generate random byte
-        }
-    }
-
-}
-
-// function to print 5x7 font
-void N5110::printChar(char const          c,
-                      unsigned int const  x,
-                      unsigned int const  y)
-{
-    if (y<BANKS) {  // check if printing in range of y banks
-
-        for (int i = 0; i < 5 ; i++ ) {
-            int pixel_x = x+i;
-            if (pixel_x > WIDTH-1)  // ensure pixel isn't outside the buffer size (0 - 83)
-                break;
-            buffer[pixel_x][y] = font5x7[(c - 32)*5 + i];
-            // array is offset by 32 relative to ASCII, each character is 5 pixels wide
-        }
-
-    }
-}
-
-// function to print string at specified position
-void N5110::printString(const char         *str,
-                        unsigned int const  x,
-                        unsigned int const  y)
-{
-    if (y<BANKS) {  // check if printing in range of y banks
-
-        int n = 0 ; // counter for number of characters in string
-        // loop through string and print character
-        while(*str) {
-
-            // writes the character bitmap data to the buffer, so that
-            // text and pixels can be displayed at the same time
-            for (int i = 0; i < 5 ; i++ ) {
-                int pixel_x = x+i+n*6;
-                if (pixel_x > WIDTH-1) // ensure pixel isn't outside the buffer size (0 - 83)
-                    break;
-                buffer[pixel_x][y] = font5x7[(*str - 32)*5 + i];
-            }
-            str++;  // go to next character in string
-            n++;    // increment index
-        }
-    }
-}
-
-// function to clear the screen buffer
-void N5110::clear()
-{
-    memset(buffer,0,sizeof(buffer));
-}
-
-// function to plot array on display
-void N5110::plotArray(float const array[])
-{
-    for (int i=0; i<WIDTH; i++) {  // loop through array
-        // elements are normalised from 0.0 to 1.0, so multiply
-        // by 47 to convert to pixel range, and subtract from 47
-        // since top-left is 0,0 in the display geometry
-        setPixel(i,47 - int(array[i]*47.0f),true);
-    }
-
-}
-
-// function to draw circle
-void N5110:: drawCircle(unsigned int const x0,
-                        unsigned int const y0,
-                        unsigned int const radius,
-                        FillType const     fill)
-{
-    // from http://en.wikipedia.org/wiki/Midpoint_circle_algorithm
-    int x = radius;
-    int y = 0;
-    int radiusError = 1-x;
-
-    while(x >= y) {
-
-        // if transparent, just draw outline
-        if (fill == FILL_TRANSPARENT) {
-            setPixel( x + x0,  y + y0,true);
-            setPixel(-x + x0,  y + y0,true);
-            setPixel( y + x0,  x + y0,true);
-            setPixel(-y + x0,  x + y0,true);
-            setPixel(-y + x0, -x + y0,true);
-            setPixel( y + x0, -x + y0,true);
-            setPixel( x + x0, -y + y0,true);
-            setPixel(-x + x0, -y + y0,true);
-        } else {  // drawing filled circle, so draw lines between points at same y value
-
-            int type = (fill==FILL_BLACK) ? 1:0;  // black or white fill
-
-            drawLine(x+x0,y+y0,-x+x0,y+y0,type);
-            drawLine(y+x0,x+y0,-y+x0,x+y0,type);
-            drawLine(y+x0,-x+y0,-y+x0,-x+y0,type);
-            drawLine(x+x0,-y+y0,-x+x0,-y+y0,type);
-        }
-
-        y++;
-        if (radiusError<0) {
-            radiusError += 2 * y + 1;
-        } else {
-            x--;
-            radiusError += 2 * (y - x) + 1;
-        }
-    }
-
-}
-
-void N5110::drawLine(unsigned int const x0,
-                     unsigned int const y0,
-                     unsigned int const x1,
-                     unsigned int const y1,
-                     unsigned int const type)
-{
-    // Note that the ranges can be negative so we have to turn the input values
-    // into signed integers first
-    int const y_range = static_cast<int>(y1) - static_cast<int>(y0);
-    int const x_range = static_cast<int>(x1) - static_cast<int>(x0);
-
-    // if dotted line, set step to 2, else step is 1
-    unsigned int const step = (type==2) ? 2:1;
-
-    // make sure we loop over the largest range to get the most pixels on the display
-    // for instance, if drawing a vertical line (x_range = 0), we need to loop down the y pixels
-    // or else we'll only end up with 1 pixel in the x column
-    if ( abs(x_range) > abs(y_range) ) {
-
-        // ensure we loop from smallest to largest or else for-loop won't run as expected
-        unsigned int const start = x_range > 0 ? x0:x1;
-        unsigned int const stop =  x_range > 0 ? x1:x0;
-
-        // loop between x pixels
-        for (unsigned int x = start; x<= stop ; x+=step) {
-            // do linear interpolation
-            int const dx = static_cast<int>(x)-static_cast<int>(x0);
-            unsigned int const y = y0 + y_range * dx / x_range;
-
-            // If the line type is '0', this will clear the pixel
-            // If it is '1' or '2', the pixel will be set
-            setPixel(x,y, type);
-        }
-    } else {
-
-        // ensure we loop from smallest to largest or else for-loop won't run as expected
-        unsigned int const start = y_range > 0 ? y0:y1;
-        unsigned int const stop =  y_range > 0 ? y1:y0;
-
-        for (unsigned int y = start; y<= stop ; y+=step) {
-            // do linear interpolation
-            int const dy = static_cast<int>(y)-static_cast<int>(y0);
-            unsigned int const x = x0 + x_range * dy / y_range;
-
-            // If the line type is '0', this will clear the pixel
-            // If it is '1' or '2', the pixel will be set
-            setPixel(x,y, type);
-        }
-    }
-
-}
-
-void N5110::drawRect(unsigned int const x0,
-                     unsigned int const y0,
-                     unsigned int const width,
-                     unsigned int const height,
-                     FillType const     fill)
-{
-    if (fill == FILL_TRANSPARENT) { // transparent, just outline
-        drawLine(x0,y0,x0+(width-1),y0,1);  // top
-        drawLine(x0,y0+(height-1),x0+(width-1),y0+(height-1),1);  // bottom
-        drawLine(x0,y0,x0,y0+(height-1),1);  // left
-        drawLine(x0+(width-1),y0,x0+(width-1),y0+(height-1),1);  // right
-    } else { // filled rectangle
-        int type = (fill==FILL_BLACK) ? 1:0;  // black or white fill
-        for (int y = y0; y<y0+height; y++) {  // loop through rows of rectangle
-            drawLine(x0,y,x0+(width-1),y,type);  // draw line across screen
-        }
-    }
-}
-
-void N5110::drawSprite(int x0,
-                       int y0,
-                       int nrows,
-                       int ncols,
-                       char *sprite)
-{
-    for (int i = 0; i < nrows; i++) {
-        for (int j = 0 ; j < ncols ; j++) {
-
-            int pixel = (int)*((sprite+i*ncols)+j);
-            if (pixel == 2) {
-                pixel = 0;
-            }
-            setPixel(x0+j,y0+i, pixel);
-        }
-    }
-}
-
-void N5110::drawSpriteTransparent(int x0,
-                                  int y0,
-                                  int nrows,
-                                  int ncols,
-                                  char *sprite)
-{
-    for (int i = 0; i < nrows; i++) {
-        for (int j = 0 ; j < ncols ; j++) {
-
-            int pixel = (int)*((sprite+i*ncols)+j);
-            if (pixel != 0) {
-                if (pixel == 2) {
-                    pixel = 0;
-                }
-                setPixel(x0+j,y0+i, pixel);
-            }
-        }
-    }
-}
-
-char * N5110::readScreen()
-{
-    for (unsigned int i = 0; i < WIDTH; i++) {
-        for (unsigned int j = 0; j < HEIGHT; j++) {
-            screen_array[j][i] = getPixel(i, j);
-        }
-    }
-    return * screen_array;
-}
\ No newline at end of file