Diff: EAOLED.cpp

Revision:

0:ff072ee9597c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/EAOLED.cpp	Sun Oct 03 08:40:47 2010 +0000
@@ -0,0 +1,390 @@
+// test library for Embedded Artists OLED used on Xpresso Baseboard
+
+#include "EAOLED.h"
+#include "mbed.h"
+
+EAOLED::EAOLED(PinName mosi, PinName dnc, PinName sclk, PinName cs, PinName power) 
+    : _spi(mosi, NC, sclk), _data(dnc), _cs(cs), _power(power) {
+    reset();    
+}
+      
+void EAOLED::command(int value) {
+    _data = 0;
+    _cs = 0;
+    _spi.write(value);
+    _cs = 1;
+}
+
+void EAOLED::data(int value) {
+    _data = 1;
+    _cs = 0;
+    _spi.write(value);
+    _cs = 1;
+}
+
+void EAOLED::reset() {
+    _power = 0;
+    _cs = 1;
+
+    // Startup sequence recommended by embedded artists baseboard reference code
+    command(0x02); // set low column address
+    command(0x12); // set high column address
+    command(0x40); // display start set
+    command(0x2e); // stop horzontal scroll
+    command(0x81); // set contrast control register
+    command(0x32); //
+    command(0x82); // brightness for color banks
+    command(0x80); // display on
+    command(0xa1); // set segment re-map
+    command(0xa6); // set normal/inverse display
+    command(0xa8); // set multiplex ratio
+    command(0x3F); //
+    command(0xd3); // set display offset
+    command(0x40); //
+    command(0xad); // set dc-dc on/off
+    command(0x8E); //
+    command(0xc8); // set com output scan direction
+    command(0xd5); // set display clock divide ratio/oscillator/frequency
+    command(0xf0); //
+    command(0xd8); // set area color mode on/off & low power display mode 
+    command(0x05); //
+    command(0xd9); // set pre-charge period
+    command(0xF1); //
+    command(0xda); // set com pins hardware configuration
+    command(0x12); //
+    command(0xdb); // set vcom deselect level
+    command(0x34); //
+    command(0x91); // set look up table for area color 
+    command(0x3f); //
+    command(0x3f); //
+    command(0x3f); //
+    command(0x3f); //
+    command(0xaf); // display on
+    command(0xa4); // display on
+
+    wait_us(10);
+
+    _power = 1;
+}
+
+#define OLED_DISPLAY_WIDTH  96
+#define OLED_DISPLAY_HEIGHT 64
+
+void EAOLED::pixel(int x, int y, int colour) {
+    int page = y >> 3;
+    int address = 18 + x;
+    
+    int lo = (address >> 0) & 0x0F;
+    int hi =  (address >> 4) | 0x10;
+    int mask = 1 << (y & 0x7);
+    int byte = page * OLED_DISPLAY_WIDTH + x;
+    
+    if(colour) {
+        framebuffer[byte] |= mask;
+    } else {
+        framebuffer[byte] &= ~mask;
+    }
+
+    command(0xB0 + page);
+    command(lo);
+    command(hi);
+    data(framebuffer[byte]);
+}
+
+void EAOLED::circle(int x0, int y0, int r, int colour) {
+
+#define OLED_DISPLAY_WIDTH  96
+#define OLED_DISPLAY_HEIGHT 64
+
+    int draw_x0, draw_y0;
+    int draw_x1, draw_y1;
+    int draw_x2, draw_y2;
+    int draw_x3, draw_y3;
+    int draw_x4, draw_y4;
+    int draw_x5, draw_y5;
+    int draw_x6, draw_y6;
+    int draw_x7, draw_y7;
+    int xx, yy;
+    int di;    
+
+    if(r == 0)          /* no radius */
+    {
+        return;
+    }
+
+    draw_x0 = draw_x1 = x0;
+    draw_y0 = draw_y1 = y0 + r;
+    if(draw_y0 < OLED_DISPLAY_HEIGHT)
+    {
+        pixel(draw_x0, draw_y0, colour);     /* 90 degree */
+    }
+
+    draw_x2 = draw_x3 = x0;
+    draw_y2 = draw_y3 = y0 - r;
+    if(draw_y2 >= 0)
+    {
+        pixel(draw_x2, draw_y2, colour);    /* 270 degree */
+    }
+    
+    draw_x4 = draw_x6 = x0 + r;
+    draw_y4 = draw_y6 = y0;
+    if(draw_x4 < OLED_DISPLAY_WIDTH)
+    {
+        pixel(draw_x4, draw_y4, colour);     /* 0 degree */
+    }    
+    
+    draw_x5 = draw_x7 = x0 - r;
+    draw_y5 = draw_y7 = y0;
+    if(draw_x5>=0)
+    {
+        pixel(draw_x5, draw_y5, colour);     /* 180 degree */
+    }
+        
+    if(r == 1)
+    {
+        return;
+    }    
+    
+    di = 3 - 2*r;
+    xx = 0;
+    yy = r;
+    while(xx < yy)
+    {
+
+        if(di < 0)
+        {
+            di += 4*xx + 6;
+        }
+        else
+        {
+            di += 4*(xx - yy) + 10;
+            yy--;
+            draw_y0--;
+            draw_y1--;
+            draw_y2++;
+            draw_y3++;
+            draw_x4--;
+            draw_x5++;
+            draw_x6--;
+            draw_x7++;
+        }
+        xx++;
+        draw_x0++;
+        draw_x1--;
+        draw_x2++;
+        draw_x3--;
+        draw_y4++;
+        draw_y5++;
+        draw_y6--;
+        draw_y7--;
+
+        if( (draw_x0 <= OLED_DISPLAY_WIDTH) && (draw_y0>=0) )
+        {
+            pixel(draw_x0, draw_y0, colour);
+        }
+
+        if( (draw_x1 >= 0) && (draw_y1 >= 0) )
+        {
+            pixel(draw_x1, draw_y1, colour);
+        }
+
+        if( (draw_x2 <= OLED_DISPLAY_WIDTH) && (draw_y2 <= OLED_DISPLAY_HEIGHT) )
+        {
+            pixel(draw_x2, draw_y2, colour);
+        }
+
+        if( (draw_x3 >=0 ) && (draw_y3 <= OLED_DISPLAY_HEIGHT) )
+        {
+            pixel(draw_x3, draw_y3, colour);
+        }
+
+        if( (draw_x4 <= /*OLED_DISPLAY_HEIGHT*/OLED_DISPLAY_WIDTH) && (draw_y4 >= 0) )
+        {
+            pixel(draw_x4, draw_y4, colour);
+        }
+
+        if( (draw_x5 >= 0) && (draw_y5 >= 0) )
+        {
+            pixel(draw_x5, draw_y5, colour);
+        }
+        if( (draw_x6 <= OLED_DISPLAY_WIDTH) && (draw_y6 <= OLED_DISPLAY_HEIGHT) )
+        {
+            pixel(draw_x6, draw_y6, colour);
+        }
+        if( (draw_x7 >= 0) && (draw_y7 <= OLED_DISPLAY_HEIGHT) )
+        {
+            pixel(draw_x7, draw_y7, colour);
+        }
+    }
+    return;
+}
+
+void EAOLED::hline(int x0, int x1, int y, int colour) {
+    for(int x=x0; x<x1; x++){
+        pixel(x, y, colour);
+    }
+    return;
+}
+
+void EAOLED::vline(int y0, int y1, int x, int colour) {
+    for(int y=y0; y<y1; y++){
+        pixel(x, y, colour);
+    }
+    return;
+}
+
+void EAOLED::line(int x0, int y0, int x1, int y1, int colour) {
+    int   dx = 0, dy = 0;
+    int   dx_sym = 0, dy_sym = 0;
+    int   dx_x2 = 0, dy_x2 = 0;
+    int   di = 0;
+
+    dx = x1-x0;
+    dy = y1-y0;
+
+
+    if(dx == 0)           /* vertical line */
+    {
+        for(int y=y0; y<y1; y++){
+            pixel(x0, y, colour);
+        }
+        return;
+    }
+
+    if(dx > 0)
+    {
+        dx_sym = 1;
+    }
+    else
+    {
+        dx_sym = -1;
+    }
+
+
+    if(dy == 0)           /* horizontal line */
+    {
+        for(int x=x0; x<x1; x++){
+            pixel(x, y0, colour);
+        }
+        return;
+    }
+
+
+    if(dy > 0)
+    {
+        dy_sym = 1;
+    }
+    else
+    {
+        dy_sym = -1;
+    }
+
+    dx = dx_sym*dx;
+    dy = dy_sym*dy;
+
+    dx_x2 = dx*2;
+    dy_x2 = dy*2;
+
+    if(dx >= dy)
+    {
+        di = dy_x2 - dx;
+        while(x0 != x1)
+        {
+
+            pixel(x0, y0, colour);
+            x0 += dx_sym;
+            if(di<0)
+            {
+                di += dy_x2;
+            }
+            else
+            {
+                di += dy_x2 - dx_x2;
+                y0 += dy_sym;
+            }
+        }
+        pixel(x0, y0, colour);
+    }
+    else
+    {
+        di = dx_x2 - dy;
+        while(y0 != y1)
+        {
+            pixel(x0, y0, colour);
+            y0 += dy_sym;
+            if(di < 0)
+            {
+                di += dx_x2;
+            }
+            else
+            {
+                di += dx_x2 - dy_x2;
+                x0 += dx_sym;
+            }
+        }
+        pixel(x0, y0, colour);
+    }
+    return;
+}
+
+void EAOLED::rect(int x0, int y0, int x1, int y1, int colour) {
+
+    for(int x=x0; x<x1; x++){
+        pixel(x, y0, colour);
+    }
+    for(int x=x0; x<x1; x++){
+        pixel(x, y1, colour);
+    }
+    for(int y=y0; y<y1; y++){
+        pixel(x0, y, colour);
+    }
+    for(int y=y0; y<y1; y++){
+        pixel(x1, y, colour);
+    }
+    return;
+}
+
+void EAOLED::fillrect(int x0, int y0, int x1, int y1, int colour) {
+
+    int i = 0;
+
+    if(x0 > x1)
+    {
+        i  = x0;
+        x0 = x1;
+        x1 = i;
+    }
+
+    if(y0 > y1)
+    {
+        i  = y0;
+        y0 = y1;
+        y1 = i;
+    }
+
+    if(y0 == y1)
+    {
+        for(int x=x0; x<x1; x++){
+            pixel(x, y0, colour);
+        }
+        return;
+    }
+
+    if(x0 == x1)
+    {
+        for(int y=y0; y<y1; y++){
+            pixel(x0, y, colour);
+        }
+        return;
+    }
+
+    while(y0 <= y1)
+    {
+        for(int x=x0; x<x1; x++){
+            pixel(x, y0, colour);
+        }
+        y0++;
+    }
+    return;
+
+}
\ No newline at end of file