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Dependencies:   MaximInterface mbed

Display.cpp@20:cdba71cb5506, 2016-09-06 (annotated)

Committer:
IanBenzMaxim
Date:
Tue Sep 06 11:33:14 2016 -0500
Revision:
20:cdba71cb5506
Parent:
17:41be4896ed6d
Child:
32:0a09505a656d
Fixed issues flagged by GCC.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
IanBenzMaxim 1:e1c7c1c636af 1 /*******************************************************************************
IanBenzMaxim 1:e1c7c1c636af 2 * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
IanBenzMaxim 1:e1c7c1c636af 3 *
IanBenzMaxim 1:e1c7c1c636af 4 * Permission is hereby granted, free of charge, to any person obtaining a
IanBenzMaxim 1:e1c7c1c636af 5 * copy of this software and associated documentation files (the "Software"),
IanBenzMaxim 1:e1c7c1c636af 6 * to deal in the Software without restriction, including without limitation
IanBenzMaxim 1:e1c7c1c636af 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
IanBenzMaxim 1:e1c7c1c636af 8 * and/or sell copies of the Software, and to permit persons to whom the
IanBenzMaxim 1:e1c7c1c636af 9 * Software is furnished to do so, subject to the following conditions:
IanBenzMaxim 1:e1c7c1c636af 10 *
IanBenzMaxim 1:e1c7c1c636af 11 * The above copyright notice and this permission notice shall be included
IanBenzMaxim 1:e1c7c1c636af 12 * in all copies or substantial portions of the Software.
IanBenzMaxim 1:e1c7c1c636af 13 *
IanBenzMaxim 1:e1c7c1c636af 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
IanBenzMaxim 1:e1c7c1c636af 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
IanBenzMaxim 1:e1c7c1c636af 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IanBenzMaxim 1:e1c7c1c636af 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
IanBenzMaxim 1:e1c7c1c636af 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
IanBenzMaxim 1:e1c7c1c636af 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
IanBenzMaxim 1:e1c7c1c636af 20 * OTHER DEALINGS IN THE SOFTWARE.
IanBenzMaxim 1:e1c7c1c636af 21 *
IanBenzMaxim 1:e1c7c1c636af 22 * Except as contained in this notice, the name of Maxim Integrated
IanBenzMaxim 1:e1c7c1c636af 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
IanBenzMaxim 1:e1c7c1c636af 24 * Products, Inc. Branding Policy.
IanBenzMaxim 1:e1c7c1c636af 25 *
IanBenzMaxim 1:e1c7c1c636af 26 * The mere transfer of this software does not imply any licenses
IanBenzMaxim 1:e1c7c1c636af 27 * of trade secrets, proprietary technology, copyrights, patents,
IanBenzMaxim 1:e1c7c1c636af 28 * trademarks, maskwork rights, or any other form of intellectual
IanBenzMaxim 1:e1c7c1c636af 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
IanBenzMaxim 1:e1c7c1c636af 30 * ownership rights.
IanBenzMaxim 1:e1c7c1c636af 31 *******************************************************************************
IanBenzMaxim 1:e1c7c1c636af 32 */
IanBenzMaxim 1:e1c7c1c636af 33
IanBenzMaxim 1:e1c7c1c636af 34 #include <sstream>
IanBenzMaxim 1:e1c7c1c636af 35 #include "Display.hpp"
IanBenzMaxim 6:b6bafd0a7013 36 #include "I2C.h"
IanBenzMaxim 17:41be4896ed6d 37 #include "wait_api.h"
IanBenzMaxim 1:e1c7c1c636af 38
IanBenzMaxim 1:e1c7c1c636af 39 //LCD Commands
IanBenzMaxim 1:e1c7c1c636af 40 //If the RS bit is set to logic 1, these display bytes are stored in the display RAM at the address specified by the data pointer. The data pointer is
IanBenzMaxim 1:e1c7c1c636af 41 //automatically updated and the data is directed to the intended ST7036i device. If the RS bit of the last control byte is set to
IanBenzMaxim 1:e1c7c1c636af 42 //logic 0, these command bytes will be decoded and the setting of the device will be changed according to the received commands.
IanBenzMaxim 1:e1c7c1c636af 43 enum LCD_Commands
IanBenzMaxim 1:e1c7c1c636af 44 {
IanBenzMaxim 1:e1c7c1c636af 45 ControlByte = 0x00, //Only one control byte will be sent. Only a stream of data bytes is allowed to follow.
IanBenzMaxim 1:e1c7c1c636af 46 ControlByte_RS_Set = 0x40, //Only one control byte will be sent with the RS bit set. Only a stream of data bytes is allowed to follow.
IanBenzMaxim 1:e1c7c1c636af 47 ControlBytes = 0x80, //Another control byte will follow, unless an I2C Stop condition is received.
IanBenzMaxim 1:e1c7c1c636af 48 ControlBytes_RS_Set = 0xC0, //RS Set and another control byte will follow, unless an I2C Stop condition is received.
IanBenzMaxim 1:e1c7c1c636af 49 };
IanBenzMaxim 1:e1c7c1c636af 50
IanBenzMaxim 1:e1c7c1c636af 51 //LCD Instructions
IanBenzMaxim 1:e1c7c1c636af 52 enum LCD_Instructions
IanBenzMaxim 1:e1c7c1c636af 53 {
IanBenzMaxim 1:e1c7c1c636af 54 ClearDisplay = 0x01,
IanBenzMaxim 1:e1c7c1c636af 55 Display_OFF = 0x08, //Display off
IanBenzMaxim 1:e1c7c1c636af 56 Display_ON = 0x0C, //Display on, cursor off, cursor position off
IanBenzMaxim 1:e1c7c1c636af 57 ReturnHome = 0x02,
IanBenzMaxim 1:e1c7c1c636af 58 SetDdramAddress = 0x80
IanBenzMaxim 1:e1c7c1c636af 59 };
IanBenzMaxim 1:e1c7c1c636af 60
IanBenzMaxim 1:e1c7c1c636af 61 // LED Driver Port Registers
IanBenzMaxim 1:e1c7c1c636af 62 // Initial port state 0x80
IanBenzMaxim 1:e1c7c1c636af 63 enum LED_Driver_Ports
IanBenzMaxim 1:e1c7c1c636af 64 {
IanBenzMaxim 1:e1c7c1c636af 65 P1 = 0x01,
IanBenzMaxim 1:e1c7c1c636af 66 P2 = 0x02, // Blue LED
IanBenzMaxim 1:e1c7c1c636af 67 P3 = 0x03, // Green LED
IanBenzMaxim 1:e1c7c1c636af 68 P4 = 0x04 // Red LED
IanBenzMaxim 1:e1c7c1c636af 69 };
IanBenzMaxim 1:e1c7c1c636af 70
IanBenzMaxim 1:e1c7c1c636af 71 // Convert a byte color value into the representation used by the MAX7306 PWM registers
IanBenzMaxim 6:b6bafd0a7013 72 static uint8_t convertColorToPwmRegVal(uint8_t color)
IanBenzMaxim 1:e1c7c1c636af 73 {
IanBenzMaxim 6:b6bafd0a7013 74 const uint8_t staticOffRegVal = 0x80; // LED is static off by setting to input
IanBenzMaxim 6:b6bafd0a7013 75 const uint8_t staticOnRegVal = 0x00; // LED is static on
IanBenzMaxim 6:b6bafd0a7013 76 const uint8_t minOnRegVal = 0x01; // LED on for minimum duty cycle
IanBenzMaxim 1:e1c7c1c636af 77
IanBenzMaxim 6:b6bafd0a7013 78 uint8_t regVal;
IanBenzMaxim 1:e1c7c1c636af 79 if (color == 0x00) // Use static off for no color
IanBenzMaxim 1:e1c7c1c636af 80 {
IanBenzMaxim 1:e1c7c1c636af 81 regVal = staticOffRegVal;
IanBenzMaxim 1:e1c7c1c636af 82 }
IanBenzMaxim 1:e1c7c1c636af 83 else if (color == 0xFF) // Use static on for full color
IanBenzMaxim 1:e1c7c1c636af 84 {
IanBenzMaxim 1:e1c7c1c636af 85 regVal = staticOnRegVal;
IanBenzMaxim 1:e1c7c1c636af 86 }
IanBenzMaxim 1:e1c7c1c636af 87 else // Use standard PWN for all other values
IanBenzMaxim 1:e1c7c1c636af 88 {
IanBenzMaxim 1:e1c7c1c636af 89 // The 3 least significant bits cannot be rendered with the MAX7306
IanBenzMaxim 1:e1c7c1c636af 90 regVal = color >> 3;
IanBenzMaxim 1:e1c7c1c636af 91 if (regVal == staticOnRegVal)
IanBenzMaxim 1:e1c7c1c636af 92 regVal = minOnRegVal;
IanBenzMaxim 1:e1c7c1c636af 93 }
IanBenzMaxim 1:e1c7c1c636af 94 return regVal;
IanBenzMaxim 1:e1c7c1c636af 95 }
IanBenzMaxim 1:e1c7c1c636af 96
IanBenzMaxim 6:b6bafd0a7013 97 Display::Display(mbed::I2C & I2C_intf, uint8_t LCD_I2C_addr, uint8_t LED_driver_I2C_addr)
IanBenzMaxim 1:e1c7c1c636af 98 : m_I2C_intf(I2C_intf), m_LCD_I2C_addr(LCD_I2C_addr), m_LED_driver_I2C_addr(LED_driver_I2C_addr)
IanBenzMaxim 1:e1c7c1c636af 99 {
IanBenzMaxim 1:e1c7c1c636af 100
IanBenzMaxim 1:e1c7c1c636af 101 }
IanBenzMaxim 1:e1c7c1c636af 102
IanBenzMaxim 1:e1c7c1c636af 103 void Display::initialize(void)
IanBenzMaxim 1:e1c7c1c636af 104 {
IanBenzMaxim 1:e1c7c1c636af 105 initializeLCD();
IanBenzMaxim 1:e1c7c1c636af 106 initializeLED_Driver();
IanBenzMaxim 1:e1c7c1c636af 107 }
IanBenzMaxim 1:e1c7c1c636af 108
IanBenzMaxim 1:e1c7c1c636af 109 void Display::initializeLED_Driver(void)
IanBenzMaxim 1:e1c7c1c636af 110 {
IanBenzMaxim 6:b6bafd0a7013 111 const uint8_t Configuration26 = 0x26; //intial port state 0xEC
IanBenzMaxim 6:b6bafd0a7013 112 const uint8_t Configuration27 = 0x27; //intial port state 0x8F
IanBenzMaxim 1:e1c7c1c636af 113
IanBenzMaxim 1:e1c7c1c636af 114 //Intial mode
IanBenzMaxim 1:e1c7c1c636af 115 //write to Configuration Register 0x26
IanBenzMaxim 1:e1c7c1c636af 116 m_I2C_intf.start();
IanBenzMaxim 1:e1c7c1c636af 117 m_I2C_intf.write(m_LED_driver_I2C_addr);
IanBenzMaxim 1:e1c7c1c636af 118 m_I2C_intf.write(Configuration26);
IanBenzMaxim 1:e1c7c1c636af 119 //RST does reset PWM/blink counters, RST resets registers to power-on-reset state
IanBenzMaxim 1:e1c7c1c636af 120 m_I2C_intf.write(0x1F);
IanBenzMaxim 1:e1c7c1c636af 121 m_I2C_intf.stop();
IanBenzMaxim 1:e1c7c1c636af 122
IanBenzMaxim 1:e1c7c1c636af 123 //Write to Configuration Register 0x27
IanBenzMaxim 1:e1c7c1c636af 124 m_I2C_intf.start();
IanBenzMaxim 1:e1c7c1c636af 125 m_I2C_intf.write(m_LED_driver_I2C_addr);
IanBenzMaxim 1:e1c7c1c636af 126 m_I2C_intf.write(Configuration27);
IanBenzMaxim 1:e1c7c1c636af 127 //Enable bus time out, set P1,P2,P3 to be controlled by their registers (0x01,0x02,0x03)
IanBenzMaxim 1:e1c7c1c636af 128 m_I2C_intf.write(0x0E);
IanBenzMaxim 1:e1c7c1c636af 129 m_I2C_intf.stop();
IanBenzMaxim 1:e1c7c1c636af 130 }
IanBenzMaxim 1:e1c7c1c636af 131
IanBenzMaxim 1:e1c7c1c636af 132 void Display::setBackLightColor(const Color & color)
IanBenzMaxim 1:e1c7c1c636af 133 {
IanBenzMaxim 1:e1c7c1c636af 134 // Red
IanBenzMaxim 1:e1c7c1c636af 135 m_I2C_intf.start();
IanBenzMaxim 1:e1c7c1c636af 136 m_I2C_intf.write(m_LED_driver_I2C_addr);
IanBenzMaxim 1:e1c7c1c636af 137 m_I2C_intf.write(P4);
IanBenzMaxim 1:e1c7c1c636af 138 m_I2C_intf.write(convertColorToPwmRegVal(color.R));
IanBenzMaxim 1:e1c7c1c636af 139 m_I2C_intf.stop();
IanBenzMaxim 1:e1c7c1c636af 140
IanBenzMaxim 1:e1c7c1c636af 141 // Green
IanBenzMaxim 1:e1c7c1c636af 142 m_I2C_intf.start();
IanBenzMaxim 1:e1c7c1c636af 143 m_I2C_intf.write(m_LED_driver_I2C_addr);
IanBenzMaxim 1:e1c7c1c636af 144 m_I2C_intf.write(P3);
IanBenzMaxim 1:e1c7c1c636af 145 m_I2C_intf.write(convertColorToPwmRegVal(color.G));
IanBenzMaxim 1:e1c7c1c636af 146 m_I2C_intf.stop();
IanBenzMaxim 1:e1c7c1c636af 147
IanBenzMaxim 1:e1c7c1c636af 148 // Blue
IanBenzMaxim 1:e1c7c1c636af 149 m_I2C_intf.start();
IanBenzMaxim 1:e1c7c1c636af 150 m_I2C_intf.write(m_LED_driver_I2C_addr);
IanBenzMaxim 1:e1c7c1c636af 151 m_I2C_intf.write(P2);
IanBenzMaxim 1:e1c7c1c636af 152 m_I2C_intf.write(convertColorToPwmRegVal(color.B));
IanBenzMaxim 1:e1c7c1c636af 153 m_I2C_intf.stop();
IanBenzMaxim 1:e1c7c1c636af 154 }
IanBenzMaxim 1:e1c7c1c636af 155
IanBenzMaxim 1:e1c7c1c636af 156 void Display::clearLine(Line line)
IanBenzMaxim 1:e1c7c1c636af 157 {
IanBenzMaxim 1:e1c7c1c636af 158 writeCompleteLine("", line);
IanBenzMaxim 1:e1c7c1c636af 159 setCursorPosition(line);
IanBenzMaxim 1:e1c7c1c636af 160 }
IanBenzMaxim 1:e1c7c1c636af 161
IanBenzMaxim 1:e1c7c1c636af 162 void Display::clearDisplay(void)
IanBenzMaxim 1:e1c7c1c636af 163 {
IanBenzMaxim 1:e1c7c1c636af 164 m_I2C_intf.start();
IanBenzMaxim 1:e1c7c1c636af 165 m_I2C_intf.write(m_LCD_I2C_addr);
IanBenzMaxim 1:e1c7c1c636af 166 m_I2C_intf.write(ControlByte); //No more control bytes will be sent
IanBenzMaxim 1:e1c7c1c636af 167 m_I2C_intf.write(ClearDisplay);
IanBenzMaxim 1:e1c7c1c636af 168 m_I2C_intf.stop();
IanBenzMaxim 1:e1c7c1c636af 169 }
IanBenzMaxim 1:e1c7c1c636af 170
IanBenzMaxim 1:e1c7c1c636af 171 void Display::initializeLCD(void)
IanBenzMaxim 1:e1c7c1c636af 172 {
IanBenzMaxim 1:e1c7c1c636af 173 m_I2C_intf.start();
IanBenzMaxim 1:e1c7c1c636af 174 m_I2C_intf.write(m_LCD_I2C_addr);
IanBenzMaxim 1:e1c7c1c636af 175 m_I2C_intf.write(ControlByte); //No more control bytes will be sent
IanBenzMaxim 1:e1c7c1c636af 176 m_I2C_intf.write(0x38); //Function Set IS[2:1] = 0,0 (&h38 = Single height font, 0x3C = double height font)
IanBenzMaxim 1:e1c7c1c636af 177 m_I2C_intf.write(0x39); //Function Set IS[2:1] = (0,1)
IanBenzMaxim 1:e1c7c1c636af 178 //When IS[2:1]=(0,0): normal instruction be selected(refer instruction table 0)
IanBenzMaxim 1:e1c7c1c636af 179 //When IS[2:1]=(0,1): extension instruction be selected(refer instruction table 1 )
IanBenzMaxim 1:e1c7c1c636af 180 //When IS[2:1]=(1,0): extension instruction be selected(refer instruction table 2 )
IanBenzMaxim 1:e1c7c1c636af 181 m_I2C_intf.write(0x14); //BIAS SET
IanBenzMaxim 1:e1c7c1c636af 182 m_I2C_intf.write(0x70); //CONTRAST (was 0x78)
IanBenzMaxim 1:e1c7c1c636af 183 m_I2C_intf.write(0x5E); //POWER/ICON CONTROL/CONTRAST (upper two bits)
IanBenzMaxim 1:e1c7c1c636af 184 m_I2C_intf.write(0x6D); //FOLLOWER CONTROL
IanBenzMaxim 17:41be4896ed6d 185 m_I2C_intf.stop();
IanBenzMaxim 17:41be4896ed6d 186 wait_ms(200); //Wait for power stable
IanBenzMaxim 17:41be4896ed6d 187 m_I2C_intf.start();
IanBenzMaxim 17:41be4896ed6d 188 m_I2C_intf.write(m_LCD_I2C_addr);
IanBenzMaxim 17:41be4896ed6d 189 m_I2C_intf.write(ControlByte); //No more control bytes will be sent
IanBenzMaxim 17:41be4896ed6d 190 m_I2C_intf.write(Display_ON); //Display on, cursor on, cursor position on
IanBenzMaxim 17:41be4896ed6d 191 m_I2C_intf.write(ClearDisplay); //Clear Display
IanBenzMaxim 17:41be4896ed6d 192 m_I2C_intf.write(0x06); //ENTRY MODE
IanBenzMaxim 1:e1c7c1c636af 193 m_I2C_intf.stop();
IanBenzMaxim 1:e1c7c1c636af 194 }
IanBenzMaxim 1:e1c7c1c636af 195
IanBenzMaxim 6:b6bafd0a7013 196 void Display::writeCharacter(uint8_t character)
IanBenzMaxim 1:e1c7c1c636af 197 {
IanBenzMaxim 1:e1c7c1c636af 198 m_I2C_intf.start();
IanBenzMaxim 1:e1c7c1c636af 199 m_I2C_intf.write(m_LCD_I2C_addr);
IanBenzMaxim 1:e1c7c1c636af 200 m_I2C_intf.write(ControlByte_RS_Set); //No more control bytes will be sent
IanBenzMaxim 1:e1c7c1c636af 201 m_I2C_intf.write(character); //Display on, cursor on, cursor position on
IanBenzMaxim 1:e1c7c1c636af 202 m_I2C_intf.stop();
IanBenzMaxim 1:e1c7c1c636af 203 }
IanBenzMaxim 1:e1c7c1c636af 204
IanBenzMaxim 1:e1c7c1c636af 205 void Display::writeText(const std::string & text)
IanBenzMaxim 1:e1c7c1c636af 206 {
IanBenzMaxim 1:e1c7c1c636af 207 const char RETURN_CHAR = 0x16;
IanBenzMaxim 1:e1c7c1c636af 208
IanBenzMaxim 6:b6bafd0a7013 209 size_t length = text.length();
IanBenzMaxim 1:e1c7c1c636af 210 if (length > lineLength)
IanBenzMaxim 1:e1c7c1c636af 211 length = lineLength;
IanBenzMaxim 1:e1c7c1c636af 212
IanBenzMaxim 1:e1c7c1c636af 213 //Write to LCD
IanBenzMaxim 1:e1c7c1c636af 214 m_I2C_intf.start();
IanBenzMaxim 1:e1c7c1c636af 215 m_I2C_intf.write(m_LCD_I2C_addr);
IanBenzMaxim 1:e1c7c1c636af 216 m_I2C_intf.write(ControlByte_RS_Set);
IanBenzMaxim 1:e1c7c1c636af 217
IanBenzMaxim 6:b6bafd0a7013 218 for(size_t i = 0; i < length; i++)
IanBenzMaxim 1:e1c7c1c636af 219 {
IanBenzMaxim 1:e1c7c1c636af 220 if(text[i] != RETURN_CHAR)
IanBenzMaxim 1:e1c7c1c636af 221 m_I2C_intf.write(text[i]);
IanBenzMaxim 1:e1c7c1c636af 222 }
IanBenzMaxim 1:e1c7c1c636af 223
IanBenzMaxim 1:e1c7c1c636af 224 m_I2C_intf.stop();
IanBenzMaxim 1:e1c7c1c636af 225 }
IanBenzMaxim 1:e1c7c1c636af 226
IanBenzMaxim 6:b6bafd0a7013 227 void Display::setCursorPosition(Line line, size_t position)
IanBenzMaxim 1:e1c7c1c636af 228 {
IanBenzMaxim 1:e1c7c1c636af 229 if (position > (lineLength - 1)) // Set to last line character for values outside the upper bound
IanBenzMaxim 1:e1c7c1c636af 230 position = (lineLength - 1);
IanBenzMaxim 1:e1c7c1c636af 231
IanBenzMaxim 1:e1c7c1c636af 232 m_I2C_intf.start();
IanBenzMaxim 1:e1c7c1c636af 233 m_I2C_intf.write(m_LCD_I2C_addr);
IanBenzMaxim 1:e1c7c1c636af 234 m_I2C_intf.write(ControlByte); // No more control bytes will be sent
IanBenzMaxim 1:e1c7c1c636af 235 if(line == SecondLine) // Offset for second line
IanBenzMaxim 1:e1c7c1c636af 236 position += 0x40;
IanBenzMaxim 1:e1c7c1c636af 237 m_I2C_intf.write(SetDdramAddress | position);
IanBenzMaxim 1:e1c7c1c636af 238 m_I2C_intf.stop();
IanBenzMaxim 1:e1c7c1c636af 239 }
IanBenzMaxim 1:e1c7c1c636af 240
IanBenzMaxim 1:e1c7c1c636af 241 void Display::writeLine(const std::string & text, Line line)
IanBenzMaxim 1:e1c7c1c636af 242 {
IanBenzMaxim 1:e1c7c1c636af 243 setCursorPosition(line);
IanBenzMaxim 1:e1c7c1c636af 244 writeText(text);
IanBenzMaxim 1:e1c7c1c636af 245 }
IanBenzMaxim 1:e1c7c1c636af 246
IanBenzMaxim 1:e1c7c1c636af 247 void Display::writeCompleteLine(const std::string & text, Line line)
IanBenzMaxim 1:e1c7c1c636af 248 {
IanBenzMaxim 1:e1c7c1c636af 249 // Add padding to user's string
IanBenzMaxim 1:e1c7c1c636af 250 std::string writeText(text);
IanBenzMaxim 1:e1c7c1c636af 251 if (writeText.length() < lineLength)
IanBenzMaxim 1:e1c7c1c636af 252 writeText.append(lineLength - writeText.length(), ' ');
IanBenzMaxim 1:e1c7c1c636af 253
IanBenzMaxim 1:e1c7c1c636af 254 writeLine(writeText, line);
IanBenzMaxim 1:e1c7c1c636af 255 }
IanBenzMaxim 1:e1c7c1c636af 256
IanBenzMaxim 1:e1c7c1c636af 257 void Display::writeMessage(const std::string & message)
IanBenzMaxim 1:e1c7c1c636af 258 {
IanBenzMaxim 1:e1c7c1c636af 259 if (message.length() > lineLength)
IanBenzMaxim 1:e1c7c1c636af 260 {
IanBenzMaxim 1:e1c7c1c636af 261 // Find split point
IanBenzMaxim 1:e1c7c1c636af 262 std::istringstream messageStream(message);
IanBenzMaxim 1:e1c7c1c636af 263 std::string word;
IanBenzMaxim 6:b6bafd0a7013 264 size_t splitIndex = 0;
IanBenzMaxim 1:e1c7c1c636af 265 do
IanBenzMaxim 1:e1c7c1c636af 266 {
IanBenzMaxim 1:e1c7c1c636af 267 if (word.length() > 0)
IanBenzMaxim 1:e1c7c1c636af 268 splitIndex += (word.length() + 1);
IanBenzMaxim 1:e1c7c1c636af 269 std::getline(messageStream, word, ' ');
IanBenzMaxim 1:e1c7c1c636af 270 } while ((splitIndex + word.length()) <= lineLength);
IanBenzMaxim 1:e1c7c1c636af 271 if (splitIndex == 0) // First word is too long
IanBenzMaxim 1:e1c7c1c636af 272 {
IanBenzMaxim 1:e1c7c1c636af 273 writeCompleteLine(message.substr(0, lineLength), FirstLine);
IanBenzMaxim 1:e1c7c1c636af 274 writeCompleteLine(message.substr(lineLength), SecondLine);
IanBenzMaxim 1:e1c7c1c636af 275 }
IanBenzMaxim 1:e1c7c1c636af 276 else
IanBenzMaxim 1:e1c7c1c636af 277 {
IanBenzMaxim 1:e1c7c1c636af 278 writeCompleteLine(message.substr(0, splitIndex - 1), FirstLine);
IanBenzMaxim 1:e1c7c1c636af 279 writeCompleteLine(message.substr(splitIndex), SecondLine);
IanBenzMaxim 1:e1c7c1c636af 280 }
IanBenzMaxim 1:e1c7c1c636af 281 }
IanBenzMaxim 1:e1c7c1c636af 282 else
IanBenzMaxim 1:e1c7c1c636af 283 {
IanBenzMaxim 1:e1c7c1c636af 284 writeCompleteLine(message, FirstLine);
IanBenzMaxim 1:e1c7c1c636af 285 writeCompleteLine("", SecondLine);
IanBenzMaxim 1:e1c7c1c636af 286 }
IanBenzMaxim 1:e1c7c1c636af 287 }