Use dedicated timer for animation

build-number.txt

@@ -1 +1 @@
-389
+409

src/animation.c

@@ -1,6 +1,8 @@
 #include "animation.h"
 #include "light_sensor.h"
 
+volatile bool Animation_FrameFlag = false;
+
 const unsigned int Animation_LEDOrder[LED_COUNT] =
 {
     19, 27, 21, 13, 0, 4, 24, 8, 12, 15, 6, 5, 28,
@@ -303,12 +305,24 @@ void Animation_DrawGradient(unsigned int step_bottom, unsigned int step_top,
     }
 }
 
+void Animation_Init(void)
+{
+    RCC->APB2ENR |= RCC_APB2ENR_TIM17EN;
+
+    TIM17->PSC = 8000 - 1;
+    TIM17->ARR = 1000 / ANIMATION_REFRESH_RATE;
+    TIM17->DIER = TIM_DIER_UIE;
+    TIM17->CR1 = TIM_CR1_CEN;
+    NVIC_EnableIRQ(TIM17_IRQn);
+}
+
 void Animation_Poll(void)
 {
-    if(!LED_FrameFlag)
+    if(!Animation_FrameFlag)
     {
         return;
     }
+    Animation_FrameFlag = false;
 
     static unsigned int bottom = 0;
     static unsigned int top = 0;
@@ -321,5 +335,10 @@ void Animation_Poll(void)
 
     Animation_DrawGradient(bottom, top, LightSensor_RelativeBrightness);
     LED_Commit();
-    LED_FrameFlag = false;
+}
+
+void TIM17_IRQHandler(void)
+{
+    Animation_FrameFlag = true;
+    TIM17->SR &= ~TIM_SR_UIF;
 }

src/animation.h

@@ -1,14 +1,19 @@
 #pragma once
 
+#include <stdbool.h>
+
 #include "led.h"
 
-#define ANIMATION_STEPS         65535
+#define ANIMATION_STEPS         (1 << 24)
+
+#define ANIMATION_REFRESH_RATE  10
 
 #define ANIMATION_DURATION_BOTTOM \
-                                1000
+                                6048000
 
-#define ANIMATION_DURATION_TOP  5000
+#define ANIMATION_DURATION_TOP  6652800
 
 extern const unsigned int Animation_LEDOrder[LED_COUNT];
 
+void Animation_Init(void);
 void Animation_Poll(void);

src/main.c

@@ -14,6 +14,7 @@ int main(void)
     }
 
     LED_Init();
+    Animation_Init();
 
     while(1)
     {