Frank Vannieuwkerke
LPC1768 Mini-DK board with 2.8" SPI TFT and SPI touch
Dependencies: Mini-DK mbed SDFileSystem
WARNING: filetoflash (SD to CPU flash)
The SPI_TFT library called from Mini-DK.lib contains an option to copy an image from the SD card to the CPU flash memory. This allows you to use an image as background without speed loss when writing other text and graphics.
By default, this option is enabled.
It can be disabled by uncommenting the #define mentioned below in Mini_DK.h:
#define NO_FLASH_BUFFER
Since the flash memory has limited write endurance, DO NOT use this feature when you intend to read multiple images from the SD card (eg: when used as a photo frame).
Revision 1:557df792279c, committed 2012-12-12
- Comitter:
- frankvnk
- Date:
- Wed Dec 12 12:42:22 2012 +0000
- Parent:
- 0:ee7076d8260a
- Child:
- 2:d0acbd263ec7
- Commit message:
- Replaced circle and fillcircle with draw_ellipse and fill_ellipse
; Modified rect and fillrect: use wirdth and height parameters instead of x1,y1
Changed in this revision
--- a/SPI_TFT/SPI_TFT.cpp Tue Dec 11 08:58:06 2012 +0000
+++ b/SPI_TFT/SPI_TFT.cpp Wed Dec 12 12:42:22 2012 +0000
@@ -305,125 +305,6 @@
_cs = 1;
}
-
-void SPI_TFT::circle(int x0, int y0, int r, int color)
-{
- wr_reg(0x03, 0x1030);
- WindowMax();
-
- 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 < height()) {
- pixel(draw_x0, draw_y0, color); /* 90 degree */
- }
-
- draw_x2 = draw_x3 = x0;
- draw_y2 = draw_y3 = y0 - r;
- if (draw_y2 >= 0) {
- pixel(draw_x2, draw_y2, color); /* 270 degree */
- }
-
- draw_x4 = draw_x6 = x0 + r;
- draw_y4 = draw_y6 = y0;
- if (draw_x4 < width()) {
- pixel(draw_x4, draw_y4, color); /* 0 degree */
- }
-
- draw_x5 = draw_x7 = x0 - r;
- draw_y5 = draw_y7 = y0;
- if (draw_x5>=0) {
- pixel(draw_x5, draw_y5, color); /* 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 <= width()) && (draw_y0>=0) ) {
- pixel(draw_x0, draw_y0, color);
- }
-
- if ( (draw_x1 >= 0) && (draw_y1 >= 0) ) {
- pixel(draw_x1, draw_y1, color);
- }
-
- if ( (draw_x2 <= width()) && (draw_y2 <= height()) ) {
- pixel(draw_x2, draw_y2, color);
- }
-
- if ( (draw_x3 >=0 ) && (draw_y3 <= height()) ) {
- pixel(draw_x3, draw_y3, color);
- }
-
- if ( (draw_x4 <= width()) && (draw_y4 >= 0) ) {
- pixel(draw_x4, draw_y4, color);
- }
-
- if ( (draw_x5 >= 0) && (draw_y5 >= 0) ) {
- pixel(draw_x5, draw_y5, color);
- }
- if ( (draw_x6 <=width()) && (draw_y6 <= height()) ) {
- pixel(draw_x6, draw_y6, color);
- }
- if ( (draw_x7 >= 0) && (draw_y7 <= height()) ) {
- pixel(draw_x7, draw_y7, color);
- }
- }
- return;
-}
-
-void SPI_TFT::fillcircle(int x, int y, int r, int color)
-{
- int i;
- for (i = 0; i <= r; i++)
- circle(x,y,i,color);
-}
-
-
-
void SPI_TFT::hline(int x0, int x1, int y, int color)
{
unsigned int index=0;
@@ -533,35 +414,34 @@
}
-void SPI_TFT::rect(int x0, int y0, int x1, int y1, int color)
+void SPI_TFT::rect(int x0, int y0, int w, int h, int color)
{
- if (x1 > x0) hline(x0,x1,y0,color);
- else hline(x1,x0,y0,color);
-
- if (y1 > y0) vline(x0,y0,y1,color);
- else vline(x0,y1,y0,color);
-
- if (x1 > x0) hline(x0,x1,y1,color);
- else hline(x1,x0,y1,color);
-
- if (y1 > y0) vline(x1,y0,y1,color);
- else vline(x1,y1,y0,color);
+ hline(x0,x0+w,y0,color);
+ vline(x0,y0,y0+h,color);
+ hline(x0,x0+w,y0+h,color);
+ vline(x0+w,y0,y0+h,color);
return;
}
-
-
-void SPI_TFT::fillrect(int x0, int y0, int x1, int y1, int color)
+void SPI_TFT::fillrect(int x0, int y0, int w, int h, int color)
{
unsigned long int index=0;
- int h = y1 - y0 + 1;
- int w = x1 - x0 + 1;
+ if (w < 0)
+ {
+ x0 = x0 + w;
+ w = -w;
+ }
+ if (h < 0)
+ {
+ y0 = y0 + h;
+ h = -h;
+ }
mod_orientation();
window(x0,y0,w,h);
wr_cmd(0x22);
- _cs = 0;
- wr_dat_start();
+ _cs = 0;
+ wr_dat_start();
for( index = 0; index < h * w; index++ )
{
@@ -571,6 +451,123 @@
return;
}
+void SPI_TFT::draw_ellipse(int xc, int yc, int a, int b, unsigned int color)
+{ /* e(x,y) = b^2*x^2 + a^2*y^2 - a^2*b^2 */
+ wr_reg(0x03, 0x1030);
+ WindowMax();
+ int x = 0, y = b;
+ long a2 = (long)a*a, b2 = (long)b*b;
+ long crit1 = -(a2/4 + a%2 + b2);
+ long crit2 = -(b2/4 + b%2 + a2);
+ long crit3 = -(b2/4 + b%2);
+ long t = -a2*y; /* e(x+1/2,y-1/2) - (a^2+b^2)/4 */
+ long dxt = 2*b2*x, dyt = -2*a2*y;
+ long d2xt = 2*b2, d2yt = 2*a2;
+
+ while (y>=0 && x<=a)
+ {
+ pixel(xc+x, yc+y, color);
+ if (x!=0 || y!=0)
+ pixel(xc-x, yc-y, color);
+ if (x!=0 && y!=0)
+ {
+ pixel(xc+x, yc-y, color);
+ pixel(xc-x, yc+y, color);
+ }
+ if (t + b2*x <= crit1 || /* e(x+1,y-1/2) <= 0 */
+ t + a2*y <= crit3) /* e(x+1/2,y) <= 0 */
+ incx();
+ else if (t - a2*y > crit2) /* e(x+1/2,y-1) > 0 */
+ incy();
+ else
+ {
+ incx();
+ incy();
+ }
+ }
+}
+
+void SPI_TFT::fill_ellipse(int xc, int yc, int a, int b, unsigned int color)
+{ /* e(x,y) = b^2*x^2 + a^2*y^2 - a^2*b^2 */
+ int x = 0, y = b;
+ int rx = x, ry = y;
+ unsigned int width = 1;
+ unsigned int height = 1;
+ long a2 = (long)a*a, b2 = (long)b*b;
+ long crit1 = -(a2/4 + a%2 + b2);
+ long crit2 = -(b2/4 + b%2 + a2);
+ long crit3 = -(b2/4 + b%2);
+ long t = -a2*y; /* e(x+1/2,y-1/2) - (a^2+b^2)/4 */
+ long dxt = 2*b2*x, dyt = -2*a2*y;
+ long d2xt = 2*b2, d2yt = 2*a2;
+
+ if (b == 0)
+ {
+ fillrect(xc-a, yc, 2*a+1, 1, color);
+ return;
+ }
+
+ while (y>=0 && x<=a)
+ {
+ if (t + b2*x <= crit1 || /* e(x+1,y-1/2) <= 0 */
+ t + a2*y <= crit3) /* e(x+1/2,y) <= 0 */
+ {
+ if (height == 1)
+ ; /* draw nothing */
+ else if (ry*2+1 > (height-1)*2)
+ {
+ fillrect(xc-rx, yc-ry, width, height-1, color);
+ fillrect(xc-rx, yc+ry+1, width, 1-height, color);
+ ry -= height-1;
+ height = 1;
+ }
+ else
+ {
+ fillrect(xc-rx, yc-ry, width, ry*2+1, color);
+ ry -= ry;
+ height = 1;
+ }
+ incx();
+ rx++;
+ width += 2;
+ }
+ else if (t - a2*y > crit2) /* e(x+1/2,y-1) > 0 */
+ {
+ incy();
+ height++;
+ }
+ else
+ {
+ if (ry*2+1 > height*2)
+ {
+ fillrect(xc-rx, yc-ry, width, height, color);
+ fillrect(xc-rx, yc+ry+1, width, -height, color);
+ }
+ else
+ {
+ fillrect(xc-rx, yc-ry, width, ry*2+1, color);
+ }
+ incx();
+ incy();
+ rx++;
+ width += 2;
+ ry -= height;
+ height = 1;
+ }
+ }
+
+ if (ry > height)
+ {
+ fillrect(xc-rx, yc-ry, width, height, color);
+ fillrect(xc-rx, yc+ry+1, width, -height, color);
+ }
+ else
+ {
+ fillrect(xc-rx, yc-ry, width, ry*2+1, color);
+ }
+}
+
+
void SPI_TFT::locate(int x, int y)
{
char_x = x;
--- a/SPI_TFT/SPI_TFT.h Tue Dec 11 08:58:06 2012 +0000
+++ b/SPI_TFT/SPI_TFT.h Wed Dec 12 12:42:22 2012 +0000
@@ -7,6 +7,8 @@
#include "GraphicsDisplay.h"
#include "mbed.h"
+#define incx() x++, dxt += d2xt, t += dxt
+#define incy() y--, dyt += d2yt, t += dyt
#define SPI_F_LO 10000000
#define SPI_F_HI 48000000
@@ -66,28 +68,6 @@
*/
virtual void pixel(int x, int y,int colour);
- /** draw a circle
- *
- * @param x0,y0 center
- * @param r radius
- * @param color 16 bit color *
- *
- */
- void circle(int x, int y, int r, int colour);
-
- /** draw a filled circle
- *
- * @param x0,y0 center
- * @param r radius
- * @param color 16 bit color *
- *
- * use circle with different radius,
- * can miss some pixel
- */
- void fillcircle(int x, int y, int r, int colour);
-
-
-
/** draw a 1 pixel line
*
* @param x0,y0 start point
@@ -100,20 +80,38 @@
/** draw a rect
*
* @param x0,y0 top left corner
- * @param x1,y1 down right corner
+ * @param w,h width and height
* @param color 16 bit color
* *
*/
- void rect(int x0, int y0, int x1, int y1, int colour);
+ void rect(int x0, int y0, int w, int h, int colour);
/** draw a filled rect
*
* @param x0,y0 top left corner
- * @param x1,y1 down right corner
+ * @param w,h width and height
* @param color 16 bit color
*
*/
- void fillrect(int x0, int y0, int x1, int y1, int colour);
+ void fillrect(int x0, int y0, int w, int h, int colour);
+
+ /** draw an ellipse - source : http://enchantia.com/graphapp/doc/tech/ellipses.html
+ *
+ * @param xc,yc center point
+ * @param a,b semi-major axis and semi-minor axis
+ * @param color 16 bit color
+ *
+ */
+ void draw_ellipse(int xc, int yc, int a, int b, unsigned int color);
+
+ /** draw a filled ellipse - source : http://enchantia.com/graphapp/doc/tech/ellipses.html
+ *
+ * @param xc,yc center point
+ * @param a,b semi-major axis and semi-minor axis
+ * @param color 16 bit color
+ *
+ */
+ void fill_ellipse(int xc, int yc, int a, int b, unsigned int color);
/** setup cursor position
*
--- a/main.cpp Tue Dec 11 08:58:06 2012 +0000
+++ b/main.cpp Wed Dec 12 12:42:22 2012 +0000
@@ -60,10 +60,10 @@
TFT.locate(120,115);
TFT.printf("Graphic");
TFT.line(0,0,100,200,Green);
- TFT.rect(100,50,150,100,Red);
- TFT.fillrect(180,25,220,70,Blue);
- TFT.circle(80,150,33,White);
- TFT.fillcircle(80,50,33,White);
+ TFT.rect(100,50,50,50,Red);
+ TFT.fillrect(180,25,40,45,Blue);
+ TFT.draw_ellipse(80, 150, 33, 33, White);
+ TFT.fill_ellipse(80, 50, 33, 33, White);
wait(2);
@@ -114,12 +114,12 @@
uint8_t r = 255, g = 0, b = 0, step = 5, i;
for (i=0;i<5;i++)
{
- for(;g<255;g+=step) {TFT.fillrect(70,110,170,210,RGB565CONVERT(r, g, b));} // Cycle from FF0000 to FFFF00 : red to yellow
- for(;r>0;r-=step) {TFT.fillrect(70,110,170,210,RGB565CONVERT(r, g, b));} // Cycle from FFFF00 to 00FF00 : yellow to green
- for(;b<255;b+=step) {TFT.fillrect(70,110,170,210,RGB565CONVERT(r, g, b));} // Cycle from 00FF00 to 00FFFF : green to cyan
- for(;g>0;g-=step) {TFT.fillrect(70,110,170,210,RGB565CONVERT(r, g, b));} // Cycle from 00FFFF to 0000FF : cyan to blue
- for(;r<255;r+=step) {TFT.fillrect(70,110,170,210,RGB565CONVERT(r, g, b));} // Cycle from 0000FF to FF00FF : blue to purple
- for(;b>0;b-=step) {TFT.fillrect(70,110,170,210,RGB565CONVERT(r, g, b));} // Cycle from FF00FF to FF0000 : purple to red
+ for(;g<255;g+=step) {TFT.fillrect(70,110,100,100,RGB565CONVERT(r, g, b));} // Cycle from FF0000 to FFFF00 : red to yellow
+ for(;r>0;r-=step) {TFT.fillrect(70,110,100,100,RGB565CONVERT(r, g, b));} // Cycle from FFFF00 to 00FF00 : yellow to green
+ for(;b<255;b+=step) {TFT.fillrect(70,110,100,100,RGB565CONVERT(r, g, b));} // Cycle from 00FF00 to 00FFFF : green to cyan
+ for(;g>0;g-=step) {TFT.fillrect(70,110,100,100,RGB565CONVERT(r, g, b));} // Cycle from 00FFFF to 0000FF : cyan to blue
+ for(;r<255;r+=step) {TFT.fillrect(70,110,100,100,RGB565CONVERT(r, g, b));} // Cycle from 0000FF to FF00FF : blue to purple
+ for(;b>0;b-=step) {TFT.fillrect(70,110,100,100,RGB565CONVERT(r, g, b));} // Cycle from FF00FF to FF0000 : purple to red
}
wait(2);
@@ -143,7 +143,7 @@
{
TFT.getDisplayPoint(&display, &screen, &matrix ) ;
TFT.TP_DrawPoint(display.x,display.y, Blue);
-// TFT.rect(display.x,display.y,display.x+1,display.y+1,Red);
+// TFT.rect(display.x,display.y,1,1,Red);
TFT.locate(25,0);
printf("%03d",display.x);
TFT.locate(95,0);
Repository toolbox
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Repository details
| Type: | Program |
|---|---|
| Mbed OS support: | Mbed 2 deprecated |
| Created: | 11 Dec 2012 |
| Imports: | 398 |
| Forks: | 2 |
| Commits: | 18 |
| Dependents: | 0 |
| Dependencies: | 3 |
| Followers: | 13 |
| Issues: | 0 |
The code in this repository is MIT licensed.