Added breakpoints code.

include/dawn/ui/breakpoint.h

@@ -0,0 +1,30 @@
+/**
+ * Copyright (c) 2021 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "../libs.h"
+
+/** Maximum breakpoints that the list can support. */
+#define BREAKPOINT_COUNT_MAX 0x04
+
+/** Callback for when a new breakpint is reached. */
+typedef void breakpointcallback_t(void *user, uint8_t i, float breakpoint);
+
+typedef struct {
+  /** List of breakpoints */
+  float breakpoints[BREAKPOINT_COUNT_MAX];
+  uint8_t breakpointCount;
+
+  /** Which breakpoint is current */
+  uint8_t breakpointCurrent;
+
+  /** Pointer to any custom user data. */
+  void *user;
+
+  /** Callback for when a breakpoint is reached */
+  breakpointcallback_t *onBreakpoint;
+} breakpointlist_t;