Diff: ILI9340_Driver.cpp

Revision:

2:7800c62c22d1

Parent:

1:0615e3c659c0

--- a/ILI9340_Driver.cpp	Mon May 26 18:32:43 2014 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,547 +0,0 @@
-/***************************************************************
-    ILI9340_Driver  v1.0    26.05.14    Ian Weston
-    
-Driver and integrated graphics library for displays that use the 
-ILI9340 controller in SPI mode.
-
-The code was prted from several sources, the driver section
-was completely ported from the Adafruits Arduino source code, and
-the graphics functions were ported from the Adafruits GFX library
-and some elements were ported from code by Elmicros seeduio port.
-
-Future revisions will include more advanced graphics functions.
-
-***************************************************************/
-
-
-#include "mbed.h"
-#include "ILI9340_Driver.h"
-#include "SimpleFont.cpp"
-
-
-// Constructor, assigns the pins to the SPI object, set orientation, and sets screen dims.
-ILI9340_Display::ILI9340_Display(PinName mosi, PinName miso, PinName sclk, PinName cs, PinName rst, PinName dc)
-    : spi(mosi, miso, sclk), cs(cs), rst(rst), dc(dc) {
-    _height = _TFTHEIGHT;
-    _width = _TFTWIDTH;
-    orientation = 0;
-    }
-
-
-// Command writing code
-void ILI9340_Display::WriteCommand(uint8_t command) {
-    dc = 0;
-    cs = 0;
-    spi.write(command);
-    cs = 1;
-    }
-  
-    
-// Data writing code
-void ILI9340_Display::WriteData(uint8_t data) {
-    cs = 0;
-    dc = 1;
-    spi.write(data);
-    cs = 1;    
-    }
-    
-    
-// Initilise the display
-void ILI9340_Display::DispInit(void) {
-    //CtrlOutput();
-    
-    rst = 0;
-    
-    // Setup the spi for 8 bit data, high steady state clock,
-    // second edge capture, with a 1MHz clock rate
-    //spi.format(8,3);
-    spi.frequency(24000000); // actually seems to work up to about 20Mhz... way better than the 8mhz as std.
-    
-    // Toggle rst to reset
-    rst = 1;
-    wait(0.005);
-    rst = 0;
-    wait(0.020);
-    rst = 1;
-    wait(0.150);
-    
-    WriteCommand(0xEF);
-    WriteData(0x03);
-    WriteData(0x80);
-    WriteData(0x02);
-
-    WriteCommand(0xCF);  
-    WriteData(0x00); 
-    WriteData(0xC1); 
-    WriteData(0x30); 
-
-    WriteCommand(0xED);  
-    WriteData(0x64); 
-    WriteData(0x03); 
-    WriteData(0x12); 
-    WriteData(0x81); 
- 
-    WriteCommand(0xE8);  
-    WriteData(0x85); 
-    WriteData(0x00); 
-    WriteData(0x78); 
-
-    WriteCommand(0xCB);  
-    WriteData(0x39); 
-    WriteData(0x2C); 
-    WriteData(0x00); 
-    WriteData(0x34); 
-    WriteData(0x02); 
- 
-    WriteCommand(0xF7);  
-    WriteData(0x20); 
-
-    WriteCommand(0xEA);  
-    WriteData(0x00); 
-    WriteData(0x00); 
- 
-    WriteCommand(ILI9340_PWCTR1);    //Power control 
-    WriteData(0x23);   //VRH[5:0] 
- 
-    WriteCommand(ILI9340_PWCTR2);    //Power control 
-    WriteData(0x10);   //SAP[2:0];BT[3:0] 
- 
-    WriteCommand(ILI9340_VMCTR1);    //VCM control 
-    WriteData(0x3e); //�Աȶȵ���
-    WriteData(0x28); 
-  
-    WriteCommand(ILI9340_VMCTR2);    //VCM control2 
-    WriteData(0x86);  //--
- 
-    WriteCommand(ILI9340_MADCTL);    // Memory Access Control 
-    WriteData(ILI9340_MADCTL_MX | ILI9340_MADCTL_BGR);
-
-    WriteCommand(ILI9340_PIXFMT);    
-    WriteData(0x55); 
-  
-    WriteCommand(ILI9340_FRMCTR1);    
-    WriteData(0x00);  
-    WriteData(0x18); 
- 
-    WriteCommand(ILI9340_DFUNCTR);    // Display Function Control 
-    WriteData(0x08); 
-    WriteData(0x82);
-    WriteData(0x27);  
- 
-    WriteCommand(0xF2);    // 3Gamma Function Disable 
-    WriteData(0x00); 
- 
-    WriteCommand(ILI9340_GAMMASET);    //Gamma curve selected 
-    WriteData(0x01); 
- 
-    WriteCommand(ILI9340_GMCTRP1);    //Set Gamma 
-    WriteData(0x0F); 
-    WriteData(0x31); 
-    WriteData(0x2B); 
-    WriteData(0x0C); 
-    WriteData(0x0E); 
-    WriteData(0x08); 
-    WriteData(0x4E); 
-    WriteData(0xF1); 
-    WriteData(0x37); 
-    WriteData(0x07); 
-    WriteData(0x10); 
-    WriteData(0x03); 
-    WriteData(0x0E); 
-    WriteData(0x09); 
-    WriteData(0x00); 
-  
-    WriteCommand(ILI9340_GMCTRN1);    //Set Gamma 
-    WriteData(0x00); 
-    WriteData(0x0E); 
-    WriteData(0x14); 
-    WriteData(0x03); 
-    WriteData(0x11); 
-    WriteData(0x07); 
-    WriteData(0x31); 
-    WriteData(0xC1); 
-    WriteData(0x48); 
-    WriteData(0x08); 
-    WriteData(0x0F); 
-    WriteData(0x0C); 
-    WriteData(0x31); 
-    WriteData(0x36); 
-    WriteData(0x0F); 
-
-    WriteCommand(ILI9340_SLPOUT);    //Exit Sleep 
-    wait(0.120);       
-    WriteCommand(ILI9340_DISPON);    //Display on 
-    
-    }
-    
-
-// Sets the rotation of the display
-void ILI9340_Display::SetRotation(uint8_t m) {
-
-  WriteCommand(ILI9340_MADCTL);
-  orientation = m % 4; // can't be higher than 3
-  
-  switch (orientation) {
-   case 0:
-     WriteData(ILI9340_MADCTL_MX | ILI9340_MADCTL_BGR);
-     _width  = _TFTWIDTH;
-     _height = _TFTHEIGHT;
-     break;
-   case 1:
-     WriteData(ILI9340_MADCTL_MV | ILI9340_MADCTL_BGR);
-     _width  = _TFTHEIGHT;
-     _height = _TFTWIDTH;
-     break;
-  case 2:
-    WriteData(ILI9340_MADCTL_MY | ILI9340_MADCTL_BGR);
-     _width  = _TFTWIDTH;
-     _height = _TFTHEIGHT;
-    break;
-   case 3:
-     WriteData(ILI9340_MADCTL_MV | ILI9340_MADCTL_MY | ILI9340_MADCTL_MX | ILI9340_MADCTL_BGR);
-     _width  = _TFTHEIGHT;
-     _height = _TFTWIDTH;
-     break;
-  }
-}
-
-
-// Invert the colours of the display in hardware
-void ILI9340_Display::InvertDisplay(bool i) {
-  WriteCommand(i ? ILI9340_INVON : ILI9340_INVOFF);
-}
-
-
-    
-// Set address window for writing data to.
-void ILI9340_Display::SetAddrWindow(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1) {
-
-  WriteCommand(ILI9340_CASET); // Column addr set
-  WriteData(x0 >> 8);
-  WriteData(x0 & 0xFF);     // XSTART 
-  WriteData(x1 >> 8);
-  WriteData(x1 & 0xFF);     // XEND
-
-  WriteCommand(ILI9340_PASET); // Row addr set
-  WriteData(y0>>8);
-  WriteData(y0);     // YSTART
-  WriteData(y1>>8);
-  WriteData(y1);     // YEND
-
-  WriteCommand(ILI9340_RAMWR); // write to RAM
-}
-
-
-
-// To draw the humble pixel
-void ILI9340_Display::DrawPixel(uint16_t x, uint16_t y, uint16_t colour) {
-    if((x < 1) ||(x >= _width) || (y < 1) || (y >= _height)) return;
-   
-    SetAddrWindow(x,y,x+1,y+1);
-    
-    dc = 1;
-    cs = 0;
-    
-    spi.write(colour >> 8);
-    spi.write(colour);
-    
-    cs = 1;
-    }
-    
-
-// Fill the screen with a colour
-void ILI9340_Display::FillScreen(uint16_t colour) {
-    SetAddrWindow(0,0,_width,_height);
-    
-    dc = 1;
-    cs = 0;
-    
-    unsigned int total = _width * _height;
-    unsigned int position = 0;
-    
-    while (position < total) {
-        spi.write(colour >> 8);
-        spi.write(colour);
-        position++;
-        }
-    cs = 1;
-    }
-    
-
-// Draws a vertical line fast
-void ILI9340_Display::DrawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t colour) {
-
-  // Rudimentary clipping
-  if((x >= _width) || (y >= _height)) return;
-
-  if((y+h-1) >= _height) 
-    h = _height-y;
-
-  SetAddrWindow(x, y, x, y+h-1);
-
-  uint8_t hi = colour >> 8, lo = colour;
-
-  dc = 1;
-  cs = 0;
-
-  while (h--) {
-    spi.write(hi);
-    spi.write(lo);
-  }
-  cs = 1;
-}
-
-
-// Draws a horizontal line fast
-void ILI9340_Display::DrawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t colour) {
-
-  // Rudimentary clipping
-  if((x >= _width) || (y >= _height)) return;
-  if((x+w-1) >= _height)  w = _width-x;
-  SetAddrWindow(x, y, x+w-1, y);
-
-  uint8_t hi = colour >> 8, lo = colour;
-  dc = 1;
-  cs = 0;
-  while (w--) {
-    spi.write(hi);
-    spi.write(lo);
-  }
-  cs = 1;
-}
-
-
-// Draws a filled rectangle 
-void ILI9340_Display::FillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t colour) {
-
-  // rudimentary clipping (drawChar w/big text requires this)
-  if((x >= _width) || (y >= _height)) return;
-  if((x + w - 1) >= _width)  w = _width  - x;
-  if((y + h - 1) >= _height) h = _height - y;
-
-  SetAddrWindow(x, y, x+w-1, y+h-1);
-
-  uint8_t hi = colour >> 8, lo = colour;
-
-  dc = 1;
-  cs = 0;
-
-  for(y=h; y>0; y--) {
-    for(x=w; x>0; x--) {
-      spi.write(hi);
-      spi.write(lo);
-    }
-  }
-  cs = 1;
-}
-
-
-
-// Draw an unfilled rectangle
-void ILI9340_Display::DrawRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color){
-    DrawFastHLine(x, y, w, color);
-    DrawFastHLine(x, y+h-1, w, color);
-    DrawFastVLine(x, y, h, color);
-    DrawFastVLine(x+w-1, y, h, color);
-}
-
-
-// draw an unfilled circle
-void ILI9340_Display::DrawCircle(int16_t x0, int16_t y0, int16_t r, uint16_t colour){
-    int16_t f = 1 - r;
-    int16_t ddF_x = 1;
-    int16_t ddF_y = -2 * r;
-    int16_t x = 0;
-    int16_t y = r;
- 
-    DrawPixel(x0  , y0+r, colour);
-    DrawPixel(x0  , y0-r, colour);
-    DrawPixel(x0+r, y0  , colour);
-    DrawPixel(x0-r, y0  , colour);
- 
-    while (x<y) {
-        if (f >= 0) {
-            y--;
-            ddF_y += 2;
-            f += ddF_y;
-        }
-        x++;
-        ddF_x += 2;
-        f += ddF_x;
- 
-        DrawPixel(x0 + x, y0 + y, colour);
-        DrawPixel(x0 - x, y0 + y, colour);
-        DrawPixel(x0 + x, y0 - y, colour);
-        DrawPixel(x0 - x, y0 - y, colour);
-        DrawPixel(x0 + y, y0 + x, colour);
-        DrawPixel(x0 - y, y0 + x, colour);
-        DrawPixel(x0 + y, y0 - x, colour);
-        DrawPixel(x0 - y, y0 - x, colour);
-    }
-}
-
-
-// Pass 8-bit (each) R,G,B, get back 16-bit packed color
-uint16_t ILI9340_Display::Colour565(uint8_t r, uint8_t g, uint8_t b) {
-  return ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b >> 3);
-}
-
-
-// Writes an ascii character to the display
-void ILI9340_Display::DrawAscii(unsigned char ascii, uint16_t x, uint16_t y, uint16_t size, uint16_t colour) {
-    SetAddrWindow(x, y, x+size, y+size);
-    
-    if( (ascii < 0x20) || (ascii > 0x7e) )      //check for valid ASCII char
-    {
-        ascii = '?';                            //char not supported
-    }
-    for(unsigned char i=0; i<8; i++)
-    {
-        unsigned char temp = simpleFont[ascii - 0x20][i];
-        for(unsigned char f=0; f<8; f++)
-        {
-            if( (temp>>f) & 0x01 )
-            {
-                switch(orientation)
-                {                
-                case '0':
-                    FillRect(x+f*size, y-i*size, size, size, colour);
-                    break;
-                case '1':
-                     FillRect(x-i*size, x-f*size, size, size, colour);
-                     break;
-                case '2':
-                     FillRect(x-f*size, y+i*size, size, size, colour);
-                     break;
-                case '3':
-                default:
-                       FillRect(x+i*size, y+f*size, size, size, colour);
-                }
-            }    
-        }
-    }
-}
-
-
-// Writes a character array to the display
-void ILI9340_Display::DrawString(char *string, uint16_t x, uint16_t y, uint8_t size, uint16_t colour)
-{
-    while(*string)
-    {
-        DrawAscii(*string, x, y, size, colour);
-        *string++;
-        switch(orientation)
-        {        
-        case '0':          
-            if(y > 0) y-=8*size;              //Change position to next char 
-              break;
-        case '1':        
-            if(x > 0) x-=8*size;                       
-            break;
-        case '2':          
-            if(y < _height) y+=8*size;   
-            break;
-        case '3':
-        default:        
-              if(x < _width) x+=8*size; 
-        }          
-    }
-}
-
-// Converts integers into a character array
-void ILI9340_Display::IntToChars (char* buffer, int value, uint8_t spaceonbuffer, uint8_t countbase, uint16_t x, uint16_t y, uint8_t size, uint16_t colour) {
-    int workvalue = value;
-    int i;
-    int valuetowrite;
-    int  end_i = 0;
-
-    if (value < 0)
-    {
-        workvalue = -value;
-        end_i = 1;
-        buffer[0] = '-';
-    }
-
-    for (i = spaceonbuffer - 1; i >= end_i; i--)
-    {
-        valuetowrite = (workvalue % countbase);
-        if (workvalue == 0)
-        {
-            if (i == (spaceonbuffer - 1))
-            {
-                buffer[i] = 48;                        // ASCII 0
-            } else {
-                buffer[i] = 32;                        // ASCII SPACE
-            }
-        } else {
-            if (valuetowrite > 9)
-            {
-                buffer[i] = valuetowrite + 55;        // ASCII A-Z
-            } else {
-                buffer[i] = valuetowrite + 48;        // ASCII of that character
-            }
-        };
-        workvalue = (workvalue - valuetowrite) / countbase;
-    }
-    
-    DrawString(buffer, x, y, size, colour);
-}
-
-
-
-// Functional code to swap data contents of 16bit registers
-void ILI9340_Display::Swap(int16_t *a, int16_t *b) {
-    
-    int16_t x = *a;
-    *a = *b;
-    *b = x;    
-    }
-
-
-// Draws a line with any length and orientation
-void ILI9340_Display::DrawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t colour){
-    int16_t steep = abs(y1 - y0) > abs(x1 - x0);
-    if (steep) {
-        Swap(&x0, &y0);
-        Swap(&x1, &y1);
-    }
- 
-    if (x0 > x1) {
-        Swap(&x0, &x1);
-        Swap(&y0, &y1);
-    }
- 
-    int16_t dx, dy;
-    dx = x1 - x0;
-    dy = abs(y1 - y0);
- 
-    int16_t err = dx / 2;
-    int16_t ystep;
- 
-    if (y0 < y1) {
-        ystep = 1;
-    } else {
-        ystep = -1;
-    }
- 
-    for (; x0<=x1; x0++) {
-        if (steep) {
-            DrawPixel(y0, x0, colour);
-        } else {
-            DrawPixel(x0, y0, colour);
-        }
-        err -= dy;
-        if (err < 0) {
-            y0 += ystep;
-            err += dx;
-        }
-    }
-}
-
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