Diff: ILI9340_Driver.cpp

Revision:

0:d67893e6f32f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ILI9340_Driver.cpp	Thu Aug 28 17:29:23 2014 +0000
@@ -0,0 +1,507 @@
+/* ILI9340C
+For use with Arduino Lib Ported for mbed */
+
+#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;
+        }
+    }
+}