Peter Drescher
Demo for FT800 lib. Use a dial wheel to select the color and a slider to change the brightness.
Use a dial to select the color and a slider to change the brightness
Diff: main.cpp
- Revision:
- 0:528baa4e7913
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Sun Sep 21 21:25:09 2014 +0000
@@ -0,0 +1,175 @@
+/* Demo for mbed Library for FTDI FT800 Enbedded Video Engine "EVE"
+ * by Peter Drescher, DC2PD 2014
+ * Released under the MIT License: http://mbed.org/license/mit */
+
+#include "mbed.h"
+#include "FT_Platform.h"
+
+
+FT800 TFT(PA_7,PA_6,PA_5,PC_7,PB_4,PA_9); // mosi, miso, sck, ss, int, pd // the FT800 is connected to SPI 11-13
+
+// global Vars
+unsigned int r,b,g;
+
+// function to convert hue , saturation and value to RGB
+// see http://en.wikipedia.org/wiki/HSL_and_HSV
+void hsv2rgb(float H,float S, float V)
+{
+ float f,h,p,q,t;
+ int i;
+ if( S == 0.0) {
+ r = V * 255;
+ g = V * 255;
+ b = V * 255;
+ return;
+ }
+ if(H > 360.0) H = 0.0; // check values
+ if(S > 1.0) S = 1.0;
+ if(S < 0.0) S = 0.0;
+ if(V > 1.0) V = 1.0;
+ if(V < 0.0) V = 0.0;
+
+ h = H / 60.0;
+ i = (int) h;
+ f = h - i;
+ p = V * (1.0 - S);
+ q = V * (1.0 - (S * f));
+ t = V * (1.0 - (S * (1.0 - f)));
+
+ switch(i) {
+ case 0:
+ r = V * 255;
+ g = t * 255;
+ b = p * 255;
+ break;
+ case 1:
+ r = q * 255;
+ g = V * 255;
+ b = p * 255;
+ break;
+ case 2:
+ r = p * 255;
+ g = V * 255;
+ b = t * 255;
+ break;
+ case 3:
+ r = p * 255;
+ g = q * 255;
+ b = V * 255;
+ break;
+ case 4:
+ r = t * 255;
+ g = p * 255;
+ b = V * 255;
+ break;
+ case 5:
+ default:
+ r = V * 255;
+ g = p * 255;
+ b = q * 255;
+ break;
+ }
+}
+
+
+/***************************************************************************/
+/* Show a Screen with Text for 5 seconds */
+/* A spinner shows the delay */
+/***************************************************************************/
+
+ft_void_t Start_Screen(ft_char8_t *str)
+{
+ TFT.DLstart(); // start a new display command list
+ TFT.DL(CLEAR_COLOR_RGB(255,255,255)); // set the clear color to white
+ TFT.DL(CLEAR(1,1,1)); // clear buffers -> color buffer,stencil buffer, tag buffer
+ TFT.DL(COLOR_RGB(0x80,0x80,0x00)); // set current color
+ TFT.Text((TFT.DispWidth/2), TFT.DispHeight/2, 31, OPT_CENTERX, str); // draw Text with font 31
+ TFT.DL(COLOR_RGB(0xFF,0x00,0x00)); // change current color
+ TFT.Spinner((TFT.DispWidth/2),TFT.DispHeight/4, 0,0); // draw a animated spinner
+
+ TFT.DL(DISPLAY()); // Display the image
+ TFT.Swap(); // Swap the current display list
+ TFT.Flush_Co_Buffer(); // Download the command list into fifo
+
+ TFT.WaitCmdfifo_empty(); // Wait till coprocessor completes the operation
+ TFT.Sleep(5000); // Wait 5 s to show
+}
+
+// construct the screen and downloasd it to the LCD
+void screen_1(unsigned int color,unsigned int bright)
+{
+ TFT.DLstart(); // start a new display command list
+ TFT.DL(CLEAR(1,1,1)); // clear buffers -> color buffer,stencil buffer, tag buffer
+ TFT.DL(COLOR_RGB(0xff,0xff,0xff)); // set current color to white
+ TFT.DL(TAG(1)); // assign TAG value 1
+ //TFT.FgColor(COLOR_RGB(0xff,0,0)); // forground color red
+ TFT.Dial(249, 86, 55, 0, color); // dial for color
+ TFT.DL(TAG(2)); // assign TAG value 2
+ //TFT.FgColor(COLOR_RGB(0,0xff,0)); // forground color green
+ TFT.Slider(196, 215, 236, 21, 0, bright , 255); // slider for brightness
+ TFT.DL(COLOR_RGB(0xff,0xff,0xff)); // set current color to white
+ TFT.Text(22, 84, 30, 0, "Color"); // text Color
+ TFT.Text(22, 208, 30, 0, "Brightness");// text Brightness
+
+ TFT.DL(POINT_SIZE(100)); // color point around the dial
+ TFT.DL(BEGIN(POINTS));
+ TFT.DL(COLOR_RGB(0x0,0x0,0xff)); // color of next point
+ TFT.DL(VERTEX2II(183,47,0,0)); // set point x,y
+ TFT.DL(COLOR_RGB(0xff,0x0,0x0));
+ TFT.DL(VERTEX2II(249,162,0,0));
+ TFT.DL(COLOR_RGB(0xff,0x0,0xff));
+ TFT.DL(VERTEX2II(183,123,0,0));
+ TFT.DL(COLOR_RGB(0xff,0xff,0x0));
+ TFT.DL(VERTEX2II(317,123,0,0));
+ TFT.DL(COLOR_RGB(0x0,0xff,0xff));
+ TFT.DL(VERTEX2II(249,11,0,0));
+ TFT.DL(COLOR_RGB(0x0,0xff,0x00));
+ TFT.DL(VERTEX2II(317,50,0,0));
+ TFT.DL(SCISSOR_XY(10,10)); // define sub area starting at 10,10
+ TFT.DL(SCISSOR_SIZE(50,50)); // size 50,50
+ hsv2rgb(color /65536.0 * 360,1.0,bright / 255.0); // calculate rgb color from settings
+ TFT.DL(CLEAR_COLOR_RGB(r,b,g)); // set filling color to r,g,b
+ TFT.DL(CLEAR(1,1,1)); // fill the area
+
+ TFT.DL(DISPLAY()); // Display the image
+ TFT.Swap(); // Swap the current display list
+ TFT.Flush_Co_Buffer(); // Download the command list into fifo
+ TFT.WaitCmdfifo_empty(); // Wait till coprocessor completes the operation
+}
+
+int main()
+{
+ unsigned int color = 0,bright = 0;
+ ft_uint32_t TrackRegisterVal = 0; // touch track
+
+ Start_Screen("RGB DEMO2 START"); // Show start screen
+ TFT.Calibrate(); // calibrate the touch screen
+
+ /* Set the tracker for the dial - define the Area for touching */
+ TFT.Track(249, 86, 1, 1, 1); // Dial - dimension 1,1 means rotary
+ TFT.Track(179, 199, 277, 48, 2); // Slider
+ TFT.Flush_Co_Buffer(); // Download the commands into fifo
+ TFT.WaitCmdfifo_empty(); // Wait till coprocessor completes the operation
+ screen_1(color,bright); // paint screen
+
+ /* the demo is updating the screen in a endless loop */
+ while(1) {
+ ft_uint8_t tagval = 0;
+ TrackRegisterVal = TFT.Rd32(REG_TRACKER); // check if one of the two tracking fields is touched
+ tagval = TrackRegisterVal & 0xff;
+ if(0 != tagval) { // touch -> get new values
+ if(1 == tagval) { // the dial touched
+ color = TrackRegisterVal>>16; // get the new value
+ } else if(2 == tagval) { // the slider is touched
+ bright = TrackRegisterVal>>16; // get new slider value
+ bright = bright * 255/65536; // scale it down to 255
+ }
+ screen_1(color,bright); // paint new screen
+ TFT.Sleep(10); // wait 10ms for next check
+ }
+
+ } // end of display loop
+}
+
+
+