project additions/changes

labW9barnestr/Inc/tasker.h

@@ -0,0 +1,41 @@
+/**
+ * @file tasker.h
+ * @author Trevor Barnes
+ * @brief 
+ * @version 0.1
+ * @date 2022-02-11
+ * 
+ * @copyright Copyright (c) 2022
+ * 
+ */
+
+#include <inttypes.h>
+
+typedef enum{PAUSED, ACTIVE} task_state;
+
+#define SCB_ICSR 0xE000D04
+#define PENDSVSET 28
+
+extern int num_tasks;
+extern int current_task;
+extern int next_task;
+extern Task tasks[];
+
+
+typedef struct {
+    uint32_t* stack_pointer;
+    uint32_t ticks_starting;
+    uint32_t ticks_remaining;
+    task_state state;
+} Task;
+
+void SysTick_Init();
+
+void tasker_tick();
+
+void init_tasker(uint32_t total_tasks, uint32_t main_ticks);
+
+void init_task(uint32_t task_num, uint32_t stacksize, 
+               void(*entry_point)(void), uint32_t ticks);
+
+void PendSV_Handler(void __attribute__((naked)));