Dependencies: mbed ELEC2645_Project_el17my
Diff: Gamepad2/N5110.cpp
- Revision:
- 2:5e54476c518f
- Parent:
- 1:df66be0b5b8b
--- a/Gamepad2/N5110.cpp Sat May 09 06:53:41 2020 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,507 +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 DigitalOut(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 DigitalOut(ledPin)),
- _pwr(NULL), // pwr not needed so null it to be safe
- _sce(new DigitalOut(scePin)),
- _rst(new DigitalOut(rstPin)),
- _dc(new DigitalOut(dcPin))
-{}
-// Second overload contructor uses the New Gamepad (Rev 2.1) pin mappings
-N5110::N5110()
- :
- _spi(new SPI(PTD2,NC,PTD1)), // create new SPI instance and initialise
- _led(new DigitalOut(PTB23)),
- _pwr(NULL), // pwr not needed so null it to be safe
- _sce(new DigitalOut(PTB19)),
- _rst(new DigitalOut(PTC1)),
- _dc(new DigitalOut(PTB18))
-{}
-
-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();
-
- backLightOn();
- 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
-}
-
-// 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();
- backLightOff(); // 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::backLightOn()
-{
- _led->write(1);
-}
-
-// function to change LED backlight brightness
-void N5110::backLightOff()
-{
- _led->write(0);
-}
-
-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,
- int *sprite)
-{
- for (int i = 0; i < nrows; i++) {
- for (int j = 0 ; j < ncols ; j++) {
-
- int pixel = *((sprite+i*ncols)+j);
- setPixel(x0+j,y0+i, pixel);
- }
- }
-}
\ No newline at end of file