Diff: AdaFruit_RGBLCDShield.cpp

Revision:

7:d087e901b74b

Parent:

6:a6be2aede8f2

Child:

8:d182b98b975f

--- a/AdaFruit_RGBLCDShield.cpp	Sat Aug 02 16:05:40 2014 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,482 +0,0 @@
-/*************************************************** 
-  This is a library for the Adafruit RGB 16x2 LCD Shield 
-  Pick one up at the Adafruit shop!
-  ---------> http://http://www.adafruit.com/products/714
-
-  The shield uses I2C to communicate, 2 pins are required to  
-  interface
-  Adafruit invests time and resources providing this open source code, 
-  please support Adafruit and open-source hardware by purchasing 
-  products from Adafruit!
-
-  Written by Limor Fried/Ladyada for Adafruit Industries.  
-  BSD license, all text above must be included in any redistribution
- ****************************************************/
-
-#include "Adafruit_RGBLCDShield.h"
-
-#include <stdio.h>
-#include <string.h>
-#include <inttypes.h>
-
-// New MBED code to handle porting
-#define OUTPUT DIR_OUTPUT
-#define INPUT DIR_INPUT
-
-#define LOW 0
-#define HIGH 1
-
-#define delayMicroseconds(a) wait(a / 1000000)
-
-/* MBED TURNED OFF
-
-Arduino i2c (wire) interface
-
-#include <Wire.h>
-#ifdef __AVR__
- #define WIRE Wire
-#else // Arduino Due
- #define WIRE Wire1
-#endif
-
-#if ARDUINO >= 100
- #include "Arduino.h"
-#else
- #include "WProgram.h"
-#endif
-*/
-
-// When the display powers up, it is configured as follows:
-//
-// 1. Display clear
-// 2. Function set: 
-//    DL = 1; 8-bit interface data 
-//    N = 0; 1-line display 
-//    F = 0; 5x8 dot character font 
-// 3. Display on/off control: 
-//    D = 0; Display off 
-//    C = 0; Cursor off 
-//    B = 0; Blinking off 
-// 4. Entry mode set: 
-//    I/D = 1; Increment by 1 
-//    S = 0; No shift 
-//
-// Note, however, that resetting the Arduino doesn't reset the LCD, so we
-// can't assume that its in that state when a sketch starts (and the
-// RGBLCDShield constructor is called).
-
-// MBED - wired in serial
-// MBED - wired in _i2c
-Adafruit_RGBLCDShield::Adafruit_RGBLCDShield(MCP23017 & inMCP, Serial & inSerial)
-    : Serial(SERIAL_TX, SERIAL_RX)
-    , _i2c(inMCP)
-    , _debug(inSerial)
-{
-  _i2cAddr = 0;
-
-  _displayfunction = LCD_4BITMODE | LCD_1LINE | LCD_5x8DOTS;
-  
-  // the I/O expander pinout
-  _rs_pin = 15;
-  _rw_pin = 14;
-  _enable_pin = 13;
-  _data_pins[0] = 12;  // really d4
-  _data_pins[1] = 11;  // really d5
-  _data_pins[2] = 10;  // really d6
-  _data_pins[3] = 9;  // really d7
-  
-  _button_pins[0] = 0;
-  _button_pins[1] = 1;
-  _button_pins[2] = 2;
-  _button_pins[3] = 3;
-  _button_pins[4] = 4;
-  // we can't begin() yet :(
-}
-
-void Adafruit_RGBLCDShield::init(uint8_t fourbitmode, uint8_t rs, uint8_t rw, uint8_t enable,
-             uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
-             uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
-{
-  _rs_pin = rs;
-  _rw_pin = rw;
-  _enable_pin = enable;
-  
-  _data_pins[0] = d0;
-  _data_pins[1] = d1;
-  _data_pins[2] = d2;
-  _data_pins[3] = d3; 
-  _data_pins[4] = d4;
-  _data_pins[5] = d5;
-  _data_pins[6] = d6;
-  _data_pins[7] = d7; 
-
-  _i2cAddr = 255;
-
-  _pinMode(_rs_pin, OUTPUT);
-  // we can save 1 pin by not using RW. Indicate by passing 255 instead of pin#
-  if (_rw_pin != 255) { 
-    _pinMode(_rw_pin, OUTPUT);
-  }
-  _pinMode(_enable_pin, OUTPUT);
-  
-
-  if (fourbitmode)
-    _displayfunction = LCD_4BITMODE | LCD_1LINE | LCD_5x8DOTS;
-  else 
-    _displayfunction = LCD_8BITMODE | LCD_1LINE | LCD_5x8DOTS;
-  
-  begin(16, 1);  
-}
-
-void Adafruit_RGBLCDShield::begin(uint8_t cols, uint8_t lines, uint8_t dotsize) {    
-  // check if i2c
-  if (_i2cAddr != 255) {
-    _debug.printf("Adafruit_RGBLCDShield::begin() - I2C ON\n\r");
-    
-    //_i2c.begin(_i2cAddr);
-    //WIRE.begin();
-    
-    _i2c.reset();
-    
-    _i2c.pinMode(8, OUTPUT);
-    _i2c.pinMode(6, OUTPUT);
-    _i2c.pinMode(7, OUTPUT);
-
-    setBacklight(0x7);
-
-    if (_rw_pin)
-      _i2c.pinMode(_rw_pin, OUTPUT);
-
-    _i2c.pinMode(_rs_pin, OUTPUT);
-    _i2c.pinMode(_enable_pin, OUTPUT);
-    for (uint8_t i=0; i<4; i++) 
-      _i2c.pinMode(_data_pins[i], OUTPUT);
-
-    unsigned short nPullups = 0;
-    for (uint8_t i=0; i<5; i++) {
-      _i2c.pinMode(_button_pins[i], INPUT);
-      nPullups |= (1 << _button_pins[i]);
-      //_i2c.pullUp(_button_pins[i], 1);
-    }
-    
-    _i2c.internalPullupMask(nPullups);
-  }
-
-  if (lines > 1) {
-    _displayfunction |= LCD_2LINE;
-  }
-  _numlines = lines;
-  _currline = 0;
-
-  // for some 1 line displays you can select a 10 pixel high font
-  if ((dotsize != 0) && (lines == 1)) {
-    _displayfunction |= LCD_5x10DOTS;
-  }
-
-  // SEE PAGE 45/46 FOR INITIALIZATION SPECIFICATION!
-  // according to datasheet, we need at least 40ms after power rises above 2.7V
-  // before sending commands. Arduino can turn on way befer 4.5V so we'll wait 50
-  delayMicroseconds(50000); 
-  // Now we pull both RS and R/W low to begin commands
-  _digitalWrite(_rs_pin, LOW);
-  _digitalWrite(_enable_pin, LOW);
-  if (_rw_pin != 255) { 
-    _digitalWrite(_rw_pin, LOW);
-  }
-  
-  //put the LCD into 4 bit or 8 bit mode
-  if (! (_displayfunction & LCD_8BITMODE)) {
-    // this is according to the hitachi HD44780 datasheet
-    // figure 24, pg 46
-
-    // we start in 8bit mode, try to set 4 bit mode
-    write4bits(0x03);
-    delayMicroseconds(4500); // wait min 4.1ms
-
-    // second try
-    write4bits(0x03);
-    delayMicroseconds(4500); // wait min 4.1ms
-    
-    // third go!
-    write4bits(0x03); 
-    delayMicroseconds(150);
-
-    // finally, set to 8-bit interface
-    write4bits(0x02); 
-  } else {
-    // this is according to the hitachi HD44780 datasheet
-    // page 45 figure 23
-
-    // Send function set command sequence
-    command(LCD_FUNCTIONSET | _displayfunction);
-    delayMicroseconds(4500);  // wait more than 4.1ms
-
-    // second try
-    command(LCD_FUNCTIONSET | _displayfunction);
-    delayMicroseconds(150);
-
-    // third go
-    command(LCD_FUNCTIONSET | _displayfunction);
-  }
-
-  // finally, set # lines, font size, etc.
-  command(LCD_FUNCTIONSET | _displayfunction);  
-
-  // turn the display on with no cursor or blinking default
-  _displaycontrol = LCD_DISPLAYON | LCD_CURSOROFF | LCD_BLINKOFF;
-  display();
-
-  // clear it off
-  clear();
-
-  // Initialize to default text direction (for romance languages)
-  _displaymode = LCD_ENTRYLEFT | LCD_ENTRYSHIFTDECREMENT;
-  // set the entry mode
-  command(LCD_ENTRYMODESET | _displaymode);
-}
-
-/********** high level commands, for the user! */
-void Adafruit_RGBLCDShield::clear()
-{
-  command(LCD_CLEARDISPLAY);  // clear display, set cursor position to zero
-  delayMicroseconds(2000);  // this command takes a long time!
-}
-
-void Adafruit_RGBLCDShield::home()
-{
-  command(LCD_RETURNHOME);  // set cursor position to zero
-  delayMicroseconds(2000);  // this command takes a long time!
-}
-
-void Adafruit_RGBLCDShield::setCursor(uint8_t col, uint8_t row)
-{
-  int row_offsets[] = { 0x00, 0x40, 0x14, 0x54 };
-  if ( row > _numlines ) {
-    row = _numlines-1;    // we count rows starting w/0
-  }
-  
-  command(LCD_SETDDRAMADDR | (col + row_offsets[row]));
-}
-
-// Turn the display on/off (quickly)
-void Adafruit_RGBLCDShield::noDisplay() {
-  _displaycontrol &= ~LCD_DISPLAYON;
-  command(LCD_DISPLAYCONTROL | _displaycontrol);
-}
-void Adafruit_RGBLCDShield::display() {
-  _displaycontrol |= LCD_DISPLAYON;
-  command(LCD_DISPLAYCONTROL | _displaycontrol);
-}
-
-// Turns the underline cursor on/off
-void Adafruit_RGBLCDShield::noCursor() {
-  _displaycontrol &= ~LCD_CURSORON;
-  command(LCD_DISPLAYCONTROL | _displaycontrol);
-}
-void Adafruit_RGBLCDShield::cursor() {
-  _displaycontrol |= LCD_CURSORON;
-  command(LCD_DISPLAYCONTROL | _displaycontrol);
-}
-
-// Turn on and off the blinking cursor
-void Adafruit_RGBLCDShield::noBlink() {
-  _displaycontrol &= ~LCD_BLINKON;
-  command(LCD_DISPLAYCONTROL | _displaycontrol);
-}
-void Adafruit_RGBLCDShield::blink() {
-  _displaycontrol |= LCD_BLINKON;
-  command(LCD_DISPLAYCONTROL | _displaycontrol);
-}
-
-// These commands scroll the display without changing the RAM
-void Adafruit_RGBLCDShield::scrollDisplayLeft(void) {
-  command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVELEFT);
-}
-void Adafruit_RGBLCDShield::scrollDisplayRight(void) {
-  command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVERIGHT);
-}
-
-// This is for text that flows Left to Right
-void Adafruit_RGBLCDShield::leftToRight(void) {
-  _displaymode |= LCD_ENTRYLEFT;
-  command(LCD_ENTRYMODESET | _displaymode);
-}
-
-// This is for text that flows Right to Left
-void Adafruit_RGBLCDShield::rightToLeft(void) {
-  _displaymode &= ~LCD_ENTRYLEFT;
-  command(LCD_ENTRYMODESET | _displaymode);
-}
-
-// This will 'right justify' text from the cursor
-void Adafruit_RGBLCDShield::autoscroll(void) {
-  _displaymode |= LCD_ENTRYSHIFTINCREMENT;
-  command(LCD_ENTRYMODESET | _displaymode);
-}
-
-// This will 'left justify' text from the cursor
-void Adafruit_RGBLCDShield::noAutoscroll(void) {
-  _displaymode &= ~LCD_ENTRYSHIFTINCREMENT;
-  command(LCD_ENTRYMODESET | _displaymode);
-}
-
-// Allows us to fill the first 8 CGRAM locations
-// with custom characters
-void Adafruit_RGBLCDShield::createChar(uint8_t location, uint8_t charmap[]) {
-  location &= 0x7; // we only have 8 locations 0-7
-  command(LCD_SETCGRAMADDR | (location << 3));
-  for (int i=0; i<8; i++) {
-    _putc(charmap[i]);
-  }
-  command(LCD_SETDDRAMADDR);  // unfortunately resets the location to 0,0
-}
-
-/*********** mid level commands, for sending data/cmds */
-
-inline void Adafruit_RGBLCDShield::command(uint8_t value) {
-  send(value, LOW);
-}
-
-#if ARDUINO >= 100
-inline size_t Adafruit_RGBLCDShield::write(uint8_t value) {
-  send(value, HIGH);
-  return 1;
-}
-#else
-//inline void Adafruit_RGBLCDShield::write(uint8_t value) {
-int Adafruit_RGBLCDShield::_putc(int value) {
-  send(value, HIGH);
-  return 1;
-}
-#endif
-
-/************ low level data pushing commands **********/
-
-// little wrapper for i/o writes
-void  Adafruit_RGBLCDShield::_digitalWrite(uint8_t p, uint8_t d) {
-  if (_i2cAddr != 255) {
-    // an i2c command
-    _i2c.digitalWrite(p, d);
-  } else {
-    // straightup IO
-    // MBED TURNED OFF
-    //digitalWrite(p, d);
-  }
-}
-
-// Allows to set the backlight, if the LCD backpack is used
-void Adafruit_RGBLCDShield::setBacklight(uint8_t status) {
-  // check if i2c or SPI
-  _i2c.digitalWrite(8, ~(status >> 2) & 0x1);
-  _i2c.digitalWrite(7, ~(status >> 1) & 0x1);
-  _i2c.digitalWrite(6, ~status & 0x1);
-}
-
-// little wrapper for i/o directions
-void  Adafruit_RGBLCDShield::_pinMode(uint8_t p, uint8_t d) {
-  if (_i2cAddr != 255) {
-    // an i2c command
-    _i2c.pinMode(p, d);
-  } else {
-    // straightup IO
-    // MBED TURNED OFF
-    //pinMode(p, d);
-  }
-}
-
-// write either command or data, with automatic 4/8-bit selection
-void Adafruit_RGBLCDShield::send(uint8_t value, uint8_t mode) {
-  _digitalWrite(_rs_pin, mode);
-
-  // if there is a RW pin indicated, set it low to Write
-  if (_rw_pin != 255) { 
-    _digitalWrite(_rw_pin, LOW);
-  }
-  
-  if (_displayfunction & LCD_8BITMODE) {
-    write8bits(value); 
-  } else {
-    write4bits(value>>4);
-    write4bits(value);
-  }
-}
-
-void Adafruit_RGBLCDShield::pulseEnable(void) {
-  _digitalWrite(_enable_pin, LOW);
-  delayMicroseconds(1);    
-  _digitalWrite(_enable_pin, HIGH);
-  delayMicroseconds(1);    // enable pulse must be >450ns
-  _digitalWrite(_enable_pin, LOW);
-  delayMicroseconds(100);   // commands need > 37us to settle
-}
-
-void Adafruit_RGBLCDShield::write4bits(uint8_t value) {
-  if (_i2cAddr != 255) {
-    uint16_t out = 0;
-
-    //out = _i2c.readGPIOAB();
-    out = _i2c.digitalWordRead();
-
-    // speed up for i2c since its sluggish
-    for (int i = 0; i < 4; i++) {
-      out &= ~(1 << _data_pins[i]);
-      out |= ((value >> i) & 0x1) << _data_pins[i];
-    }
-
-    // make sure enable is low
-    out &= ~(1 << _enable_pin);
-
-    //_i2c.writeGPIOAB(out);
-    _i2c.digitalWordWrite(out);
-
-    // pulse enable
-    delayMicroseconds(1);
-    out |= (1 << _enable_pin);
-    //_i2c.writeGPIOAB(out);
-    _i2c.digitalWordWrite(out);
-    
-    delayMicroseconds(1);
-    out &= ~(1 << _enable_pin);
-    
-    //_i2c.writeGPIOAB(out);   
-    _i2c.digitalWordWrite(out);
-    
-    delayMicroseconds(100);
-
-  } else {
-    for (int i = 0; i < 4; i++) {
-     _pinMode(_data_pins[i], OUTPUT);
-     _digitalWrite(_data_pins[i], (value >> i) & 0x01);
-    }
-    pulseEnable();
-  }
-}
-
-void Adafruit_RGBLCDShield::write8bits(uint8_t value) {
-  for (int i = 0; i < 8; i++) {
-    _pinMode(_data_pins[i], OUTPUT);
-    _digitalWrite(_data_pins[i], (value >> i) & 0x01);
-  }
-  
-  pulseEnable();
-}
-
-uint8_t Adafruit_RGBLCDShield::readButtons(void) {
-  uint8_t reply = 0x1F;
-
-  for (uint8_t i=0; i<5; i++) {
-    reply &= ~((_i2c.digitalRead(_button_pins[i])) << i);
-  }
-  return reply;
-}
-
-void Adafruit_RGBLCDShield::debugWait(const char * inMessage)
-{
-    _debug.printf("Wait: %s", inMessage);
-    
-    while (0 == readButtons()) {
-        wait(0.2);
-    }
-    
-    _debug.printf(" DONE\r\n");
-}