Initialisation
This commit is contained in:
Thomas Livernet
312
libraries/Adafruit_PCD8544/Adafruit_PCD8544.cpp
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312
libraries/Adafruit_PCD8544/Adafruit_PCD8544.cpp
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/*********************************************************************
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This is a library for our Monochrome Nokia 5110 LCD Displays
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Pick one up today in the adafruit shop!
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------> http://www.adafruit.com/products/338
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These displays use SPI to communicate, 4 or 5 pins are required to
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interface
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Adafruit invests time and resources providing this open source code,
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please support Adafruit and open-source hardware by purchasing
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products from Adafruit!
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Written by Limor Fried/Ladyada for Adafruit Industries.
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BSD license, check license.txt for more information
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All text above, and the splash screen below must be included in any redistribution
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*********************************************************************/
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//#include <Wire.h>
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#include <avr/pgmspace.h>
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#if defined(ARDUINO) && ARDUINO >= 100
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#include "Arduino.h"
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#else
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#include "WProgram.h"
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#endif
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#include <util/delay.h>
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#include <stdlib.h>
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#include <Adafruit_GFX.h>
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#include "Adafruit_PCD8544.h"
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// the memory buffer for the LCD
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uint8_t pcd8544_buffer[LCDWIDTH * LCDHEIGHT / 8] = {
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC, 0xFC, 0xFE, 0xFF, 0xFC, 0xE0,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8,
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0xF8, 0xF0, 0xF0, 0xE0, 0xE0, 0xC0, 0x80, 0xC0, 0xFC, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0x3F, 0x7F,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x1F, 0x3F, 0x7F, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xE7, 0xC7, 0xC7, 0x87, 0x8F, 0x9F, 0x9F, 0xFF, 0xFF, 0xFF,
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0xC1, 0xC0, 0xE0, 0xFC, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFC, 0xFC, 0xFC, 0xFC, 0xFE, 0xFE, 0xFE,
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0xFC, 0xFC, 0xF8, 0xF8, 0xF0, 0xE0, 0xC0, 0xC0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x80, 0xC0, 0xE0, 0xF1, 0xFB, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0x1F, 0x0F, 0x0F, 0x87,
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0xE7, 0xFF, 0xFF, 0xFF, 0x1F, 0x1F, 0x3F, 0xF9, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xFD, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0x3F, 0x0F, 0x07, 0x01, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0xF0, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE,
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0x7E, 0x3F, 0x3F, 0x0F, 0x1F, 0xFF, 0xFF, 0xFF, 0xFC, 0xF0, 0xE0, 0xF1, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFC, 0xF0, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x01,
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0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x0F, 0x1F, 0x3F, 0x7F, 0x7F,
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0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0x7F, 0x1F, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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};
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// reduces how much is refreshed, which speeds it up!
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// originally derived from Steve Evans/JCW's mod but cleaned up and
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// optimized
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//#define enablePartialUpdate
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#ifdef enablePartialUpdate
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static uint8_t xUpdateMin, xUpdateMax, yUpdateMin, yUpdateMax;
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#endif
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static void updateBoundingBox(uint8_t xmin, uint8_t ymin, uint8_t xmax, uint8_t ymax) {
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#ifdef enablePartialUpdate
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if (xmin < xUpdateMin) xUpdateMin = xmin;
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if (xmax > xUpdateMax) xUpdateMax = xmax;
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if (ymin < yUpdateMin) yUpdateMin = ymin;
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if (ymax > yUpdateMax) yUpdateMax = ymax;
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#endif
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}
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Adafruit_PCD8544::Adafruit_PCD8544(int8_t SCLK, int8_t DIN, int8_t DC,
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int8_t CS, int8_t RST) : Adafruit_GFX(LCDWIDTH, LCDHEIGHT) {
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_din = DIN;
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_sclk = SCLK;
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_dc = DC;
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_rst = RST;
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_cs = CS;
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}
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Adafruit_PCD8544::Adafruit_PCD8544(int8_t SCLK, int8_t DIN, int8_t DC,
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int8_t RST) : Adafruit_GFX(LCDWIDTH, LCDHEIGHT) {
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_din = DIN;
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_sclk = SCLK;
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_dc = DC;
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_rst = RST;
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_cs = -1;
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}
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// the most basic function, set a single pixel
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void Adafruit_PCD8544::drawPixel(int16_t x, int16_t y, uint16_t color) {
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if ((x < 0) || (x >= LCDWIDTH) || (y < 0) || (y >= LCDHEIGHT))
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return;
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// x is which column
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if (color)
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pcd8544_buffer[x+ (y/8)*LCDWIDTH] |= _BV(y%8);
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else
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pcd8544_buffer[x+ (y/8)*LCDWIDTH] &= ~_BV(y%8);
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updateBoundingBox(x,y,x,y);
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}
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// the most basic function, get a single pixel
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uint8_t Adafruit_PCD8544::getPixel(int8_t x, int8_t y) {
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if ((x < 0) || (x >= LCDWIDTH) || (y < 0) || (y >= LCDHEIGHT))
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return 0;
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return (pcd8544_buffer[x+ (y/8)*LCDWIDTH] >> (y%8)) & 0x1;
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}
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void Adafruit_PCD8544::begin(uint8_t contrast) {
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// set pin directions
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pinMode(_din, OUTPUT);
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pinMode(_sclk, OUTPUT);
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pinMode(_dc, OUTPUT);
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if (_rst > 0)
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pinMode(_rst, OUTPUT);
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if (_cs > 0)
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pinMode(_cs, OUTPUT);
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// toggle RST low to reset
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if (_rst > 0) {
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digitalWrite(_rst, LOW);
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_delay_ms(500);
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digitalWrite(_rst, HIGH);
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}
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clkport = portOutputRegister(digitalPinToPort(_sclk));
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clkpinmask = digitalPinToBitMask(_sclk);
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mosiport = portOutputRegister(digitalPinToPort(_din));
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mosipinmask = digitalPinToBitMask(_din);
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csport = portOutputRegister(digitalPinToPort(_cs));
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cspinmask = digitalPinToBitMask(_cs);
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dcport = portOutputRegister(digitalPinToPort(_dc));
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dcpinmask = digitalPinToBitMask(_dc);
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// get into the EXTENDED mode!
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command(PCD8544_FUNCTIONSET | PCD8544_EXTENDEDINSTRUCTION );
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// LCD bias select (4 is optimal?)
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command(PCD8544_SETBIAS | 0x4);
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// set VOP
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if (contrast > 0x7f)
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contrast = 0x7f;
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command( PCD8544_SETVOP | contrast); // Experimentally determined
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// normal mode
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command(PCD8544_FUNCTIONSET);
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// Set display to Normal
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command(PCD8544_DISPLAYCONTROL | PCD8544_DISPLAYNORMAL);
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// initial display line
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// set page address
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// set column address
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// write display data
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// set up a bounding box for screen updates
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updateBoundingBox(0, 0, LCDWIDTH-1, LCDHEIGHT-1);
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// Push out pcd8544_buffer to the Display (will show the AFI logo)
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display();
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}
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inline void Adafruit_PCD8544::fastSPIwrite(uint8_t d) {
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for(uint8_t bit = 0x80; bit; bit >>= 1) {
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*clkport &= ~clkpinmask;
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if(d & bit) *mosiport |= mosipinmask;
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else *mosiport &= ~mosipinmask;
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*clkport |= clkpinmask;
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}
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}
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inline void Adafruit_PCD8544::slowSPIwrite(uint8_t c) {
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shiftOut(_din, _sclk, MSBFIRST, c);
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}
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void Adafruit_PCD8544::command(uint8_t c) {
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digitalWrite(_dc, LOW);
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if (_cs > 0)
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digitalWrite(_cs, LOW);
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fastSPIwrite(c);
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if (_cs > 0)
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digitalWrite(_cs, HIGH);
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}
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void Adafruit_PCD8544::data(uint8_t c) {
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digitalWrite(_dc, HIGH);
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if (_cs > 0)
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digitalWrite(_cs, LOW);
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fastSPIwrite(c);
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if (_cs > 0)
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digitalWrite(_cs, HIGH);
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}
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void Adafruit_PCD8544::setContrast(uint8_t val) {
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if (val > 0x7f) {
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val = 0x7f;
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}
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command(PCD8544_FUNCTIONSET | PCD8544_EXTENDEDINSTRUCTION );
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command( PCD8544_SETVOP | val);
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command(PCD8544_FUNCTIONSET);
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}
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void Adafruit_PCD8544::display(void) {
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uint8_t col, maxcol, p;
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for(p = 0; p < 6; p++) {
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#ifdef enablePartialUpdate
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// check if this page is part of update
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if ( yUpdateMin >= ((p+1)*8) ) {
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continue; // nope, skip it!
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}
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if (yUpdateMax < p*8) {
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break;
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}d
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#endif
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command(PCD8544_SETYADDR | p);
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#ifdef enablePartialUpdate
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col = xUpdateMin;
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maxcol = xUpdateMax;
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#else
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// start at the beginning of the row
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col = 0;
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maxcol = LCDWIDTH-1;
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#endif
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command(PCD8544_SETXADDR | col);
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digitalWrite(_dc, HIGH);
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if (_cs > 0)
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digitalWrite(_cs, LOW);
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for(; col <= maxcol; col++) {
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//uart_putw_dec(col);
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//uart_putchar(' ');
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fastSPIwrite(pcd8544_buffer[(LCDWIDTH*p)+col]);
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}
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if (_cs > 0)
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digitalWrite(_cs, HIGH);
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}
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command(PCD8544_SETYADDR ); // no idea why this is necessary but it is to finish the last byte?
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#ifdef enablePartialUpdate
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xUpdateMin = LCDWIDTH - 1;
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xUpdateMax = 0;
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yUpdateMin = LCDHEIGHT-1;
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yUpdateMax = 0;
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#endif
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}
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// clear everything
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void Adafruit_PCD8544::clearDisplay(void) {
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memset(pcd8544_buffer, 0, LCDWIDTH*LCDHEIGHT/8);
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updateBoundingBox(0, 0, LCDWIDTH-1, LCDHEIGHT-1);
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cursor_y = cursor_x = 0;
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}
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/*
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// this doesnt touch the buffer, just clears the display RAM - might be handy
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void Adafruit_PCD8544::clearDisplay(void) {
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uint8_t p, c;
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for(p = 0; p < 8; p++) {
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st7565_command(CMD_SET_PAGE | p);
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for(c = 0; c < 129; c++) {
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//uart_putw_dec(c);
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//uart_putchar(' ');
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st7565_command(CMD_SET_COLUMN_LOWER | (c & 0xf));
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st7565_command(CMD_SET_COLUMN_UPPER | ((c >> 4) & 0xf));
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st7565_data(0x0);
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}
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}
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}
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*/
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Block a user