borg_hw_lolshield: framerate can be adjusted in the menu, now

profiles/LoL-Shield_Leonardo

@@ -21,6 +21,7 @@ BORG_HW=HW_LOLSHIELD
 #
 USER_TIMER0_FOR_WAIT=1
 BRIGHTNESS=127
+FRAMERATE=80
 
 #
 # Features

profiles/LoL-Shield_Mega2560

@@ -21,6 +21,7 @@ BORG_HW=HW_LOLSHIELD
 #
 USER_TIMER0_FOR_WAIT=1
 BRIGHTNESS=127
+FRAMERATE=80
 
 #
 # Features

profiles/LoL-Shield_Uno-Duemilanove-Diavolino

@@ -21,6 +21,7 @@ BORG_HW=HW_LOLSHIELD
 #
 USER_TIMER0_FOR_WAIT=1
 BRIGHTNESS=127
+FRAMERATE=80
 
 #
 # Features

src/borg_hw/borg_hw_lolshield.c

@@ -47,11 +47,19 @@
 // buffer which holds the currently shown frame
 unsigned char pixmap[NUMPLANE][NUM_ROWS][LINEBYTES];
 
+
+/* adjust frame rate at the menuconfig, this is just a fallback */
+#ifndef FRAMERATE
+#	define FRAMERATE 80
+#elif FRAMERATE < 1
+#	error FRAMERATE must be greater than 0
+#endif
+
 // Number of ticks of the prescaled timer per cycle per frame, based on the
 // CPU clock speed and the desired frame rate.
-#define FRAMERATE 80UL
-#define	TICKS (F_CPU + 6 * (FRAMERATE << SLOWSCALERSHIFT)) / (12 * (FRAMERATE << SLOWSCALERSHIFT))
-#define	CUTOFF(scaler)	((128 * 12 - 6) * FRAMERATE * scaler)
+#define	TICKS (F_CPU + 6ul * (FRAMERATE << SLOWSCALERSHIFT)) / \
+	(12ul * (FRAMERATE << SLOWSCALERSHIFT))
+#define	CUTOFF(scaler)	((128ul * 12 - 6) * FRAMERATE * scaler##ul)
 
 #if defined (__AVR_ATmega8__)    || \
     defined (__AVR_ATmega48__)   || \

src/borg_hw/config_lolshield.in

@@ -3,6 +3,7 @@ comment "lolshield setup"
 
 define_int USER_TIMER0_FOR_WAIT 1
 
-uint "Brightness (0-127)"  BRIGHTNESS  127
+uint "Brightness (0-127)"     BRIGHTNESS 127
+uint "Framerate (default 80)" FRAMERATE   80
 
 endmenu