David Lowe / Mbed 2 deprecated Mandelbrot

Modified Bob Stone's code for ILI9341 QVGA TFT's without touch capability. Navigation is now done with rotary encoders - two for position, & one setting the maxiterations.

Dependencies:   SPI_TFT_ILI9341 TFT_fonts mbed

Fork of Mandelbrot by Bob Stone

Should have mentioned in the above: Encoder code is specific to the STM32F4, tested on Nucleo F401, should work on the Nucleo F411..

/media/uploads/gregeric/img_20150121_093103_744-1-.jpg /media/uploads/gregeric/img_20150121_093055_682-1-.jpg

Files at this revision

API Documentation at this revision

Revision 3:267e7130007d, committed 2015-01-22

Comitter:
gregeric
Date:
Thu Jan 22 10:01:49 2015 +0000
Parent:
2:b1169b84a563
Commit message:
Increase debounce time, shown necessary after round of testing.

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file 
diff -r b1169b84a563 -r 267e7130007d main.cpp
--- a/main.cpp	Tue Jan 20 15:10:25 2015 +0000
+++ b/main.cpp	Thu Jan 22 10:01:49 2015 +0000
@@ -56,7 +56,7 @@
 #define maxiters (MINITERS+TIM4->CNT)
 uint16_t lastiters=MINITERS;
 
-enum nextaction {
+enum nextaction_t {
     idle=0,
     zoomin,
     zoomout,
@@ -64,7 +64,7 @@
     interrupted
 };
 
-enum nextaction buttonpressed;
+nextaction_t buttonpressed;
 
 void GotZoomIn(void)
 {
@@ -302,7 +302,7 @@
         //log status @ PC serial port
         printf("%1.18f%+1.18fi, %+d, %d\n\r", centrex, -centrey, log2zoom, maxiters);
 
-        wait(0.2); //debounce
+        wait(0.3); //debounce
         buttonpressed=idle;
 
         UpdateStats();
@@ -311,7 +311,7 @@
         tt.set_orientation(ORIENTATION);
         DrawMandelbrot();
 
-        wait(0.2); //debounce
+        wait(0.3); //debounce
         //flag that we should update status bar, but not commence new render
         if (buttonpressed) buttonpressed=interrupted;
 
@@ -331,8 +331,10 @@
                 if (shiftx!=lastshiftx || shifty!=lastshifty || maxiters!=lastiters) break;
             }
 
-            EraseCursor(WIDTH/2+lastshiftx, HEIGHT/2+lastshifty);
-            DrawCursor(WIDTH/2+shiftx, HEIGHT/2+shifty);
+            if(maxiters==lastiters) { //we're here cos cursor moved (speeds up redraw when twiddling maxiter knob
+                EraseCursor(WIDTH/2+lastshiftx, HEIGHT/2+lastshifty);
+                DrawCursor(WIDTH/2+shiftx, HEIGHT/2+shifty);
+            }
 
             lastshiftx=shiftx;
             lastshifty=shifty;