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00001 /**
00002  ******************************************************************************
00003  *   @file     Lcd.c
00004  *   @brief    Source file for ST7565R LCD control.
00005  *   @author   ADI
00006  *   @date     March 2016
00007  *
00008  *******************************************************************************
00009  * Copyright 2015(c) Analog Devices, Inc.
00010  *
00011  * All rights reserved.
00012  *
00013  * Redistribution and use in source and binary forms, with or without modification,
00014  * are permitted provided that the following conditions are met:
00015  *  - Redistributions of source code must retain the above copyright
00016  *    notice, this list of conditions and the following disclaimer.
00017  *  - Redistributions in binary form must reproduce the above copyright
00018  *    notice, this list of conditions and the following disclaimer in
00019  *    the documentation and/or other materials provided with the
00020  *    distribution.
00021  *  - Neither the name of Analog Devices, Inc. nor the names of its
00022  *    contributors may be used to endorse or promote products derived
00023  *    from this software without specific prior written permission.
00024  *  - The use of this software may or may not infringe the patent rights
00025  *    of one or more patent holders.  This license does not release you
00026  *    from the requirement that you obtain separate licenses from these
00027  *    patent holders to use this software.
00028  *  - Use of the software either in source or binary form, must be run
00029  *    on or directly connected to an Analog Devices Inc. component.
00030  *
00031  * THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR IMPLIED
00032  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT, MERCHANTABILITY
00033  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
00034  * IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00035  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
00036  * INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
00037  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
00038  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00039  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00040  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00041  *
00042  *******************************************************************************
00043  **/
00044 
00045 /******************************************************************************/
00046 /***************************** Include Files **********************************/
00047 /******************************************************************************/
00048 #include "Lcd.h"
00049 #include "mbed.h"
00050 
00051 
00052 
00053 Lcd::Lcd(PinName rst_pin, PinName a0_pin, PinName bl_pin,
00054          PinName cs_pin, PinName MOSI,
00055          PinName MISO, PinName SCK) :
00056 
00057     rst(rst_pin), a0(a0_pin), bl(bl_pin), cs(cs_pin), lcd_spi(MOSI, MISO, SCK)
00058 {
00059     rst = 1;
00060 }
00061 
00062 /**
00063  @brief Initialization of LCD screen
00064  @return none
00065  **/
00066 
00067 void Lcd::write_cmd(uint8_t cmd)
00068 {
00069     cs = 0;
00070     a0 = 0;
00071     lcd_spi.write(cmd);
00072     cs = 1;
00073 }
00074 
00075 void Lcd::write_data(uint8_t data)
00076 {
00077     cs = 0;
00078     a0 = 1;
00079     lcd_spi.write(data);
00080     cs = 1;
00081 }
00082 
00083 void Lcd::bl_enable()
00084 {
00085     bl = 1;
00086 }
00087 
00088 void Lcd::bl_disable()
00089 {
00090     bl = 0;
00091 }
00092 
00093 void Lcd::init(void)
00094 {
00095 
00096     write_cmd(CMD_DISPLAY_OFF);
00097     write_cmd(CMD_SET_BIAS_7);
00098     write_cmd(CMD_SET_ADC_NORMAL);
00099     write_cmd(CMD_SET_COM_REVERSE);
00100     write_cmd((CMD_SET_RESISTOR_RATIO | 0x02));
00101     write_cmd(CMD_SET_VOLUME_FIRST);
00102     write_cmd((CMD_SET_VOLUME_SECOND | 0x04));
00103     write_cmd((CMD_SET_POWER_CONTROL | 0x07));
00104     fill_pages(0, 8, 0x00);
00105 
00106 }
00107 
00108 /**
00109  @brief Displays a string at the specified position for with 5x7 font size.
00110  @return none
00111  **/
00112 void Lcd::display_string(uint8_t ui8row, uint8_t ui8col, int8_t *pi8str)
00113 {
00114     uint8_t ui8x;
00115     uint8_t ui8i;
00116     uint8_t ui8ch;
00117     uint8_t ui8data;
00118 
00119     ui8ch = 0;
00120     ui8x = ui8col;
00121 
00122     while ((pi8str[ui8ch] != 0) && (ui8col < LCD_COLUMNS)) {
00123         set_cursor(ui8row, ui8x); /* Set cursor position */
00124 
00125         for (ui8i = 0; ui8i < 5; ui8i++) { /* Symbol matrix column loop */
00126             ui8data = pui8font5x7[pi8str[ui8ch] - OFFS_ASCII][ui8i];
00127 
00128             write_data(ui8data);
00129         }
00130 
00131         ui8x += 6; /* Increase column counter with 6 pixels */
00132         ui8ch++; /* Increment counter */
00133     }
00134     write_cmd(CMD_DISPLAY_ON);
00135 
00136 }
00137 
00138 /**
00139  @brief Displays a symbol (8 x width) at the specified position on the LCD.
00140  @param ui8row - row number
00141  @param ui8col - column number
00142  @param ui8width - symbol width
00143  @param pui8symbol - symbol to display
00144  @return none
00145  **/
00146 
00147 void Lcd::display_symbol(uint8_t ui8row, uint8_t ui8col, uint8_t ui8width,
00148                          const uint8_t *pui8symbol)
00149 {
00150     uint8_t ui8i;
00151     uint8_t ui8data;
00152 
00153     set_cursor(ui8row, ui8col); /* Set cursor position */
00154     for (ui8i = 0; ui8i < ui8width; ui8i++) { /* Symbol matrix column loop */
00155         ui8data = pui8symbol[ui8i];
00156         write_data(ui8data);
00157     }
00158     write_cmd(CMD_DISPLAY_ON);
00159 }
00160 
00161 /**
00162  @brief Fills the selected LCD pages with the data specified.
00163  @param ui8start - start element
00164  @param ui8num - elements numbers to fill
00165  @param ui8Data - data to fill
00166  @return none
00167  **/
00168 
00169 void Lcd::fill_pages(uint8_t ui8start, uint8_t ui8num, uint8_t ui8Data)
00170 {
00171 
00172     uint8_t ui8p;
00173     uint8_t ui8c;
00174 
00175     for (ui8p = ui8start; ui8p < (ui8start + ui8num); ui8p++) {
00176         set_cursor(ui8p, 0);
00177 
00178         for (ui8c = 0; ui8c < LCD_COLUMNS; ui8c++) {
00179             write_data(ui8Data);
00180         }
00181     }
00182 
00183     write_cmd(CMD_DISPLAY_ON);
00184 }
00185 
00186 /**
00187  @brief Sets the start line of the LCD.
00188  @param ui8line - line to start with
00189  @return none
00190  **/
00191 
00192 void Lcd::set_line(uint8_t ui8line)
00193 {
00194 
00195     uint8_t ui8Cmd;
00196     ui8Cmd = CMD_SET_DISP_START_LINE | (ui8line & 0x3F); /* Set start line  */
00197     write_cmd(ui8Cmd);
00198 
00199 }
00200 
00201 
00202 /**
00203  @brief Sets the cursor position at which data will be written.
00204  @param ui8PA - page number
00205  @param ui8CA - column number
00206  @return none
00207  **/
00208 
00209 void Lcd::set_cursor(uint8_t ui8PA, uint8_t ui8CA)
00210 {
00211     uint8_t ui8Cmd;
00212 
00213     ui8Cmd = 0xB0 | (ui8PA & 0x0F); /* Set page address */
00214     write_cmd(ui8Cmd);
00215 
00216     ui8Cmd = ui8CA & 0x0F; /* Set column address LSB CA[3:0] */
00217     write_cmd(ui8Cmd);
00218 
00219     ui8Cmd = 0x10 | (ui8CA >> 4); /* Set column address MSB CA[7:4] */
00220     write_cmd(ui8Cmd);
00221 }
00222 
00223 
00224 const uint8_t Lcd::pui8Rec8x8[8] = {
00225     0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
00226 };
00227 const uint8_t Lcd::pui8RecInv8x8[8] = {
00228     0xFF, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0xFF
00229 };
00230 
00231 const uint8_t Lcd::pui8font5x7[96][5] = {
00232     {0x00, 0x00, 0x00, 0x00, 0x00},  /*     32  */
00233     {0x00, 0x00, 0x4F, 0x00, 0x00},  /*  !  33  */
00234     {0x00, 0x07, 0x00, 0x07, 0x00},  /*  "  34  */
00235     {0x14, 0x7F, 0x14, 0x7F, 0x14},  /*  #  35  */
00236     {0x24, 0x2A, 0x7F, 0x2A, 0x12},  /*  $  36  */
00237     {0x23, 0x13, 0x08, 0x64, 0x62},  /*  %  37  */
00238     {0x36, 0x49, 0x55, 0x22, 0x50},  /*  &  38  */
00239     {0x00, 0x05, 0x03, 0x00, 0x00},  /*  '  39  */
00240     {0x00, 0x1C, 0x22, 0x41, 0x00},  /*  (  40  */
00241     {0x00, 0x41, 0x22, 0x1C, 0x00},  /*  )  41  */
00242     {0x14, 0x08, 0x3E, 0x08, 0x14},  /*  *  42  */
00243     {0x08, 0x08, 0x3E, 0x08, 0x08},  /*  +  43  */
00244     {0x00, 0x50, 0x30, 0x00, 0x00},  /*  ,  44  */
00245     {0x08, 0x08, 0x08, 0x08, 0x08},  /*  -  45  */
00246     {0x00, 0x60, 0x60, 0x00, 0x00},  /*  .  46  */
00247     {0x20, 0x10, 0x08, 0x04, 0x02},  /*  /  47  */
00248     {0x3E, 0x51, 0x49, 0x45, 0x3E},  /*  0  48  */
00249     {0x00, 0x42, 0x7F, 0x40, 0x00},  /*  1  49  */
00250     {0x42, 0x61, 0x51, 0x49, 0x46},  /*  2  50  */
00251     {0x21, 0x41, 0x45, 0x4B, 0x31},  /*  3  51  */
00252     {0x18, 0x14, 0x12, 0x7F, 0x10},  /*  4  52  */
00253     {0x27, 0x45, 0x45, 0x45, 0x39},  /*  5  53  */
00254     {0x3C, 0x4A, 0x49, 0x49, 0x30},  /*  6  54  */
00255     {0x01, 0x71, 0x09, 0x05, 0x03},  /*  7  55  */
00256     {0x36, 0x49, 0x49, 0x49, 0x36},  /*  8  56  */
00257     {0x06, 0x49, 0x49, 0x29, 0x1E},  /*  9  57  */
00258     {0x36, 0x36, 0x00, 0x00, 0x00},  /*  :  58  */
00259     {0x56, 0x36, 0x00, 0x00, 0x00},  /*  ;  59  */
00260     {0x08, 0x14, 0x22, 0x41, 0x00},  /*  <  60  */
00261     {0x14, 0x14, 0x14, 0x14, 0x14},  /*  =  61  */
00262     {0x00, 0x41, 0x22, 0x14, 0x08},  /*  >  62  */
00263     {0x02, 0x01, 0x51, 0x09, 0x06},  /*  ?  63  */
00264     {0x30, 0x49, 0x79, 0x41, 0x3E},  /*  @  64  */
00265     {0x7E, 0x11, 0x11, 0x11, 0x7E},  /*  A  65  */
00266     {0x7F, 0x49, 0x49, 0x49, 0x36},  /*  B  66  */
00267     {0x3E, 0x41, 0x41, 0x41, 0x22},  /*  C  67  */
00268     {0x7F, 0x41, 0x41, 0x22, 0x1C},  /*  D  68  */
00269     {0x7F, 0x49, 0x49, 0x49, 0x41},  /*  E  69  */
00270     {0x7F, 0x09, 0x09, 0x09, 0x01},  /*  F  70  */
00271     {0x3E, 0x41, 0x49, 0x49, 0x7A},  /*  G  71  */
00272     {0x7F, 0x08, 0x08, 0x08, 0x7F},  /*  H  72  */
00273     {0x00, 0x41, 0x7F, 0x41, 0x00},  /*  I  73  */
00274     {0x20, 0x40, 0x41, 0x3F, 0x01},  /*  J  74  */
00275     {0x7F, 0x08, 0x14, 0x22, 0x41},  /*  K  75  */
00276     {0x7F, 0x40, 0x40, 0x40, 0x40},  /*  L  76  */
00277     {0x7F, 0x02, 0x0C, 0x02, 0x7F},  /*  M  77  */
00278     {0x7F, 0x04, 0x08, 0x10, 0x7F},  /*  N  78  */
00279     {0x3E, 0x41, 0x41, 0x41, 0x3E},  /*  O  79  */
00280     {0x7F, 0x09, 0x09, 0x09, 0x06},  /*  P  80  */
00281     {0x3E, 0x41, 0x51, 0x21, 0x5E},  /*  Q  81  */
00282     {0x7F, 0x09, 0x19, 0x29, 0x46},  /*  R  82  */
00283     {0x46, 0x49, 0x49, 0x49, 0x31},  /*  S  83  */
00284     {0x01, 0x01, 0x7F, 0x01, 0x01},  /*  T  84  */
00285     {0x3F, 0x40, 0x40, 0x40, 0x3F},  /*  U  85  */
00286     {0x1F, 0x20, 0x40, 0x20, 0x1F},  /*  V  86  */
00287     {0x3F, 0x40, 0x30, 0x40, 0x3F},  /*  W  87  */
00288     {0x63, 0x14, 0x08, 0x14, 0x63},  /*  X  88  */
00289     {0x07, 0x08, 0x70, 0x08, 0x07},  /*  Y  89  */
00290     {0x61, 0x51, 0x49, 0x45, 0x43},  /*  Z  90  */
00291     {0x00, 0x7F, 0x41, 0x41, 0x00},  /*  [  91  */
00292     {0x02, 0x04, 0x08, 0x10, 0x20},  /*  \  92  */
00293     {0x00, 0x41, 0x41, 0x7F, 0x00},  /*  ]  93  */
00294     {0x04, 0x02, 0x01, 0x02, 0x04},  /*  ^  94  */
00295     {0x40, 0x40, 0x40, 0x40, 0x40},  /*  _  95  */
00296     {0x00, 0x01, 0x02, 0x04, 0x00},  /*  `  96  */
00297     {0x20, 0x54, 0x54, 0x54, 0x78},  /*  a  97  */
00298     {0x7F, 0x50, 0x48, 0x48, 0x30},  /*  b  98  */
00299     {0x38, 0x44, 0x44, 0x44, 0x20},  /*  c  99  */
00300     {0x38, 0x44, 0x44, 0x48, 0x7F},  /*  d  100 */
00301     {0x38, 0x54, 0x54, 0x54, 0x18},  /*  e  101 */
00302     {0x08, 0x7E, 0x09, 0x01, 0x02},  /*  f  102 */
00303     {0x0C, 0x52, 0x52, 0x52, 0x3E},  /*  g  103 */
00304     {0x7F, 0x08, 0x04, 0x04, 0x78},  /*  h  104 */
00305     {0x00, 0x44, 0x7D, 0x40, 0x00},  /*  i  105 */
00306     {0x20, 0x40, 0x44, 0x3D, 0x00},  /*  j  106 */
00307     {0x7F, 0x10, 0x28, 0x44, 0x00},  /*  k  107 */
00308     {0x00, 0x41, 0x7F, 0x40, 0x00},  /*  l  108 */
00309     {0x78, 0x04, 0x18, 0x04, 0x78},  /*  m  109 */
00310     {0x7C, 0x08, 0x04, 0x04, 0x78},  /*  n  110 */
00311     {0x38, 0x44, 0x44, 0x44, 0x38},  /*  o  111 */
00312     {0x7C, 0x14, 0x14, 0x14, 0x08},  /*  p  112 */
00313     {0x08, 0x14, 0x14, 0x18, 0x7C},  /*  q  113 */
00314     {0x7C, 0x08, 0x04, 0x04, 0x08},  /*  r  114 */
00315     {0x48, 0x54, 0x54, 0x54, 0x20},  /*  s  115 */
00316     {0x04, 0x3F, 0x44, 0x40, 0x20},  /*  t  116 */
00317     {0x3C, 0x40, 0x40, 0x20, 0x7C},  /*  u  117 */
00318     {0x1C, 0x20, 0x40, 0x20, 0x1C},  /*  v  118 */
00319     {0x3C, 0x40, 0x30, 0x40, 0x3C},  /*  w  119 */
00320     {0x44, 0x28, 0x10, 0x28, 0x44},  /*  x  120 */
00321     {0x0C, 0x50, 0x50, 0x50, 0x3C},  /*  y  121 */
00322     {0x44, 0x64, 0x54, 0x4C, 0x44},  /*  z  122 */
00323     {0x00, 0x08, 0x36, 0x41, 0x00},  /*  {  123 */
00324     {0x00, 0x00, 0x7F, 0x00, 0x00},  /*  |  124 */
00325     {0x00, 0x41, 0x36, 0x08, 0x00},  /*  }  125 */
00326     {0x0C, 0x02, 0x0C, 0x10, 0x0C},  /*  ~  126 */
00327     {0x00, 0x00, 0x00, 0x00, 0x00}  /*     127 */
00328 };