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2026-06-12 02:55:04 -07:00
commit 30406f4f49
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--- a/RTOSVerySimple/user.c
+++ b/RTOSVerySimple/user.c
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+//*****************************************************************************
+// user.c
+// Runs on MSPM0
+// An example user program that initializes the simple operating system
+//   Schedule three independent threads using preemptive round robin  
+//   Each thread rapidly toggles a pin on Port B and increments its counter 
+//   TIMESLICE is how long each thread runs
+
+// 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/
+ */
+
+#include <stdint.h>
+#include "osSimple.h"
+#include "../inc/Clock.h"
+#include "../inc/TExaS.h"
+#include <ti/devices/msp/msp.h>
+#include "../inc/LaunchPad.h"
+#define TIMESLICE  (TIME_2MS)    // thread switch time in system time units
+void OS_DisableInterrupts(void); // Disable interrupts
+void OS_EnableInterrupts(void);  // Enable interrupts
+uint32_t Count0;   // number of times Task0 loops
+uint32_t Count1;   // number of times Task1 loops
+uint32_t Count2;   // number of times Task2 loops
+uint32_t Count3;   // number of times Task3 loops
+
+void Task0(void){
+  Count0 = 0;
+  for(;;){
+    Count0++;
+    GPIOA->DOUTTGL31_0 = 0x01;      // toggle PA0
+    Clock_Delay(1000);
+   }
+}
+void Task1(void){
+  Count1 = 0;
+  for(;;){
+    Count1++;
+    GPIOA->DOUTTGL31_0 = 0x02;      // toggle PA1
+    Clock_Delay(1000);
+  }
+}
+void Task2(void){
+  Count2 = 0;
+  for(;;){
+    Count2++;
+    GPIOA->DOUTTGL31_0 = 0x04;      // toggle PA2
+    Clock_Delay(1000);
+  }
+}
+void Task3(void){
+  Count3 = 0;
+  for(;;){
+    Count3++;
+    GPIOA->DOUTTGL31_0 = 0x08;      // toggle PA3
+    Clock_Delay(1000);
+  }
+}
+void PortA_Init(void){
+ IOMUX->SECCFG.PINCM[PA0INDEX] = (uint32_t) 0x00000081;
+  IOMUX->SECCFG.PINCM[PA1INDEX] = (uint32_t) 0x00000081;
+  IOMUX->SECCFG.PINCM[PA2INDEX] = (uint32_t) 0x00000081;
+  IOMUX->SECCFG.PINCM[PA3INDEX] = (uint32_t) 0x00000081;
+  GPIOA->DOE31_0 |= 0x0F;
+}
+int main(void){
+  OS_DisableInterrupts();
+  LaunchPad_Init(); 
+  Clock_Init80MHz(0);         // set processor clock to 80 MHz
+  TExaS_Init(0,0,TExaS_PA60Logic);
+  OS_Init();           // initialize OS
+  PortA_Init();
+  OS_AddThreads(&Task0, &Task1, &Task2, &Task3);
+  OS_Launch(TIMESLICE); // doesn't return, interrupts enabled in here
+  return 0;             // this never executes
+}