git.sur5r.net Git - freertos/blob - Demo/CORTEX_LPC1768_GCC_RedSuite/src/LCD/lcd_driver.c

   1 //*****************************************************************************\r
   2 //   +--+       \r
   3 //   | ++----+   \r
   4 //   +-++    |  \r
   5 //     |     |  \r
   6 //   +-+--+  |   \r
   7 //   | +--+--+  \r
   8 //   +----+    Copyright (c) 2009 Code Red Technologies Ltd. \r
   9 //\r
  10 // lcd_driver.c contains the lowest level access routines for the Sitronix\r
  11 // ST7637 LCD Controller/driver used on the RDB1768 development board.\r
  12 //\r
  13 //\r
  14 // Software License Agreement\r
  15 // \r
  16 // The software is owned by Code Red Technologies and/or its suppliers, and is \r
  17 // protected under applicable copyright laws.  All rights are reserved.  Any \r
  18 // use in violation of the foregoing restrictions may subject the user to criminal \r
  19 // sanctions under applicable laws, as well as to civil liability for the breach \r
  20 // of the terms and conditions of this license.\r
  21 // \r
  22 // THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED\r
  23 // OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF\r
  24 // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.\r
  25 // USE OF THIS SOFTWARE FOR COMMERCIAL DEVELOPMENT AND/OR EDUCATION IS SUBJECT\r
  26 // TO A CURRENT END USER LICENSE AGREEMENT (COMMERCIAL OR EDUCATIONAL) WITH\r
  27 // CODE RED TECHNOLOGIES LTD. \r
  28 \r
  29 #include "NXP/LPC17xx/LPC17xx.h"\r
  30 #include "lcd_driver.h"\r
  31 #include "lcd_commands.h"\r
  32 \r
  33 // Bits within GPIO port 2 used for LCD driver\r
  34 #define LCD_CSB_PIN            (1<<13)\r
  35 #define LCD_A0_PIN             (1<<8)\r
  36 #define LCD_WR_PIN             (1<<11)\r
  37 #define LCD_RD_PIN             (1<<12)\r
  38 #define LCD_DATA_PIN                    0xff\r
  39 \r
  40 // Bit within GPIO port 3 used for LCD driver\r
  41 #define LCD_RESB_PIN           (1<<25)\r
  42 \r
  43 // Bits to configure as outputs for driving LCD\r
  44 #define LCD_PORT2_DIRECTIONS  (LCD_CSB_PIN | LCD_A0_PIN | LCD_WR_PIN | LCD_RD_PIN | LCD_DATA_PIN)\r
  45 #define LCD_PORT3_DIRECTIONS  (LCD_RESB_PIN)\r
  46 \r
  47 // Define names for GPIO port 2 and 3 registers to better indicate in code\r
  48 // the operation being carried out on the LCD driver hardware.\r
  49 #define LCD_DATA_CLR    FIO2CLR\r
  50 #define LCD_DATA_SET    FIO2SET\r
  51 \r
  52 #define LCD_CSB_CLR             FIO2CLR\r
  53 #define LCD_CSB_SET             FIO2SET\r
  54 \r
  55 #define LCD_RESB_CLR    FIO3CLR\r
  56 #define LCD_RESB_SET    FIO3SET\r
  57 \r
  58 #define LCD_A0_CLR              FIO2CLR\r
  59 #define LCD_A0_SET              FIO2SET\r
  60 \r
  61 #define LCD_WR_CLR              FIO2CLR\r
  62 #define LCD_WR_SET              FIO2SET\r
  63 \r
  64 #define LCD_RD_CLR              FIO2CLR\r
  65 #define LCD_RD_SET              FIO2SET\r
  66 \r
  67 // Routine to write data to LCD driver. Normally called in combination\r
  68 // with LCDdriver_WriteCom() routine\r
  69 void LCDdriver_WriteData(unsigned char LCD_Data)\r
  70 {\r
  71     LCD_DATA_CLR = LCD_DATA_PIN;   \r
  72     LCD_DATA_SET = LCD_Data;\r
  73     LCD_CSB_CLR = LCD_CSB_PIN;\r
  74     LCD_WR_CLR = LCD_WR_PIN;\r
  75     LCD_WR_SET = LCD_WR_PIN;\r
  76     LCD_CSB_SET = LCD_CSB_PIN;\r
  77 }\r
  78 \r
  79 // Routine to configure set LCD driver to accept particular command.\r
  80 // A call to this routine will normally be followed by a call\r
  81 // to LCDdriver_WriteData() to transfer appropriate parameters to driver.\r
  82 void LCDdriver_WriteCom(unsigned char LCD_Command)\r
  83 {\r
  84     LCD_DATA_CLR = LCD_DATA_PIN;   \r
  85     LCD_DATA_SET = LCD_Command;\r
  86     LCD_A0_CLR =        LCD_A0_PIN;\r
  87     LCD_CSB_CLR = LCD_CSB_PIN;\r
  88     LCD_WR_CLR = LCD_WR_PIN;\r
  89     LCD_WR_SET = LCD_WR_PIN;\r
  90     LCD_CSB_SET = LCD_CSB_PIN;\r
  91         LCD_A0_SET =    LCD_A0_PIN;\r
  92 }\r
  93 \r
  94 // Function to add short delays in writing things to the LCD.\r
  95 void ms_delay(int n)\r
  96 {\r
  97    volatile int d;\r
  98    for (d=0; d<n*3000; d++){}\r
  99 }\r
 100 \r
 101 \r
 102 // Initialize GPIO connection to the LCD driver\r
 103 void LCDdriver_ConfigGPIOtoLCD(void)\r
 104 {\r
 105     // set direction to outputs \r
 106         FIO2DIR |= LCD_PORT2_DIRECTIONS;        \r
 107         FIO3DIR |= LCD_PORT3_DIRECTIONS;\r
 108         \r
 109         // Set GPIO outputs connected to LCD to default values\r
 110         LCD_CSB_SET = LCD_CSB_PIN;\r
 111         LCD_A0_SET = LCD_A0_PIN;\r
 112         LCD_WR_SET = LCD_WR_PIN;\r
 113         LCD_RD_SET = LCD_RD_PIN;\r
 114         LCD_RESB_SET = LCD_RESB_PIN;\r
 115         LCD_DATA_CLR =  0xff; // data bus to zero \r
 116 \r
 117 }\r
 118 \r
 119 \r
 120 // Initialisation routine to set up LCD\r
 121 void LCDdriver_initialisation(void)\r
 122 {\r
 123         int i;          // temp loop variable\r
 124         \r
 125         LCDdriver_ConfigGPIOtoLCD();            // Initialize the GPIO for the display\r
 126 \r
 127         LCDdriver_WriteCom(DD_SWRESET);         // SW reset\r
 128         ms_delay(120);                                          // Small delay\r
 129 \r
 130         LCDdriver_WriteCom(DD_AUTOLOADSET);     // disable auto loading of mask rom data\r
 131         LCDdriver_WriteData(0xBF);\r
 132 \r
 133         LCDdriver_WriteCom(DD_EPCTIN);                  // OTP control mode=read\r
 134         LCDdriver_WriteData(0x00);\r
 135         ms_delay(10);                                                   // Small delay\r
 136 \r
 137         LCDdriver_WriteCom(DD_EPREAD);                  // Start the OTP read.\r
 138         ms_delay(20);                                                   // Small delay\r
 139 \r
 140         LCDdriver_WriteCom(DD_EPCTOUT);         // Cancel the OTP read (20ms should have been enough)\r
 141 \r
 142         LCDdriver_WriteCom(DD_DISPOFF);         // display off\r
 143 \r
 144         LCDdriver_WriteCom(DD_SLPOUT);                  // Exit sleep mode.\r
 145         ms_delay(50);                                                   // Small delay\r
 146 \r
 147         LCDdriver_WriteCom(DD_VopSet);                  // set LCD operating voltage to 14V.\r
 148         LCDdriver_WriteData(0x04);\r
 149         LCDdriver_WriteData(0x01);\r
 150 \r
 151         LCDdriver_WriteCom(DD_BiasSel);         // Select an LCD bias voltage ratio of 1/12.\r
 152         LCDdriver_WriteData(0x00);\r
 153 \r
 154         LCDdriver_WriteCom(DD_BstMbpXSel);              // x8 booster circuit on\r
 155         LCDdriver_WriteData(0x07);\r
 156 \r
 157         LCDdriver_WriteCom(DD_ColScanDir);              // Invert the column scan direction for the panel.\r
 158         LCDdriver_WriteData(0xC0);\r
 159 \r
 160         LCDdriver_WriteCom(DD_COLORMOD);                // 16bpp, 5-6-5 data input mode.\r
 161         LCDdriver_WriteData(0x05);\r
 162         \r
 163         LCDdriver_WriteCom(DD_MADCTR);                  // mem scan direction\r
 164         LCDdriver_WriteData(0x00);\r
 165         \r
 166         LCDdriver_WriteCom(DD_DISPON);                  // display on\r
 167 \r
 168         // Now Clear the Screen\r
 169         LCDdriver_WriteCom(DD_CASET);\r
 170         LCDdriver_WriteData(0x00);\r
 171         LCDdriver_WriteData(0x7F);\r
 172 \r
 173         LCDdriver_WriteCom(DD_RASET);\r
 174         LCDdriver_WriteData(0x01);\r
 175         LCDdriver_WriteData(0x80);\r
 176 \r
 177         LCDdriver_WriteCom(DD_RAMWR);\r
 178         for(i = 0; i < (128 * 128); i++)\r
 179         {\r
 180                 LCDdriver_WriteData(0x00);\r
 181                 LCDdriver_WriteData(0x00);\r
 182         }\r
 183 \r
 184         LCDdriver_WriteCom(DD_NORON);                   // normal operation mode\r
 185 }\r
 186 \r
 187 \r
 188 \r
 189 \r
 190 \r