all

RTOSVerySimple/osSimple.h

@@ -0,0 +1,58 @@
+// os.h
+// Runs on MSPM0
+// A very simple real time operating system with minimal features.
+// Jonathan Valvano
+// June 8, 2025
+
+/* 
+ Copyright 2025 by Jonathan W. Valvano, valvano@mail.utexas.edu
+    You may use, edit, run or distribute this file
+    as long as the above copyright notice remains
+ THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
+ OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
+ VALVANO SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL,
+ OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
+ For more information about my classes, my research, and my books, see
+ http://users.ece.utexas.edu/~valvano/
+ */
+
+
+#ifndef __OS_H
+#define __OS_H  1
+
+// fill these depending on your clock
+#define TIME_1MS  80000
+#define TIME_2MS  2*TIME_1MS
+#define TIME_5MS  5*TIME_1MS
+
+// function definitions in osasmSimple.s
+void OS_DisableInterrupts(void); // Disable interrupts
+void OS_EnableInterrupts(void);  // Enable interrupts
+void StartOS(void);
+
+// ******** OS_Init ************
+// initialize operating system, disable interrupts until OS_Launch
+// initialize OS controlled I/O: systick, 50 MHz PLL
+// input:  none
+// output: none
+void OS_Init(void);
+
+//******** OS_AddThread ***************
+// add three foregound threads to the scheduler
+// Inputs: three pointers to a void/void foreground tasks
+// Outputs: 1 if successful, 0 if this thread can not be added
+void OS_AddThreads(void(*task0)(void),
+                 void(*task1)(void),
+                 void(*task2)(void),void(*task3)(void));
+
+
+
+//******** OS_Launch ***************
+// start the scheduler, enable interrupts
+// Inputs: number of 20ns clock cycles for each time slice
+//         (maximum of 24 bits)
+// Outputs: none (does not return)
+void OS_Launch(uint32_t theTimeSlice);
+
+#endif