ugfx: add gdispGSetFlushPeriod() function to dynamically set the refresh rate

Author: redchenjs

components/ugfx/src/gdisp/gdisp.c

@@ -26,6 +26,7 @@
 
 #if GDISP_NEED_TIMERFLUSH
 	static GTimer	FlushTimer;
+	static uint16_t FlushPeriod = GDISP_NEED_TIMERFLUSH;
 #endif
 
 GDisplay	*GDISP;
@@ -549,6 +550,14 @@ static void line_clip(GDisplay *g) {
 		for(g = (GDisplay *)gdriverGetNext(GDRIVER_TYPE_DISPLAY, 0); g; g = (GDisplay *)gdriverGetNext(GDRIVER_TYPE_DISPLAY, (GDriver *)g))
 			gdispGFlush(g);
 	}
+	void gdispGSetFlushPeriod(GDisplay *g, uint16_t period) {
+		if (period > GDISP_NEED_TIMERFLUSH) {
+			FlushPeriod = period;
+		} else {
+			FlushPeriod = GDISP_NEED_TIMERFLUSH;
+		}
+		gtimerStart(&FlushTimer, FlushTimerFn, 0, TRUE, FlushPeriod);
+	}
 #endif
 
 /*===========================================================================*/
@@ -611,7 +620,7 @@ void _gdispInit(void)
 	// Start the automatic timer flush (if required)
 	#if GDISP_NEED_TIMERFLUSH
 		gtimerInit(&FlushTimer);
-		gtimerStart(&FlushTimer, FlushTimerFn, 0, TRUE, GDISP_NEED_TIMERFLUSH);
+		gtimerStart(&FlushTimer, FlushTimerFn, 0, TRUE, FlushPeriod);
 	#endif
 }
 

components/ugfx/src/gdisp/gdisp.h

@@ -1153,6 +1153,10 @@ void gdispGDrawBox(GDisplay *g, coord_t x, coord_t y, coord_t cx, coord_t cy, co
 	#define gdispFillRoundedBox(x,y,cx,cy,r,c)		gdispGFillRoundedBox(GDISP,x,y,cx,cy,r,c)
 #endif
 
+#if GDISP_NEED_TIMERFLUSH
+	void gdispGSetFlushPeriod(GDisplay *g, uint16_t period);
+#endif
+
 /*
  * Macro definitions
  */