Start work on official MSP430X port layer for IAR.

2025-09-03 04:43:52 -04:00 · 2010-12-28 15:22:17 +00:00 · 2010-12-28 15:22:17 +00:00 · b20be831b7
commit b20be831b7
parent c83d421388
4 changed files with 585 additions and 0 deletions
--- a/Source/portable/IAR/MSP430X/portext.s43
+++ b/Source/portable/IAR/MSP430X/portext.s43
@ -0,0 +1,133 @@
+/*
+    FreeRTOS V6.1.0 - Copyright (C) 2010 Real Time Engineers Ltd.
+
+    ***************************************************************************
+    *                                                                         *
+    * If you are:                                                             *
+    *                                                                         *
+    *    + New to FreeRTOS,                                                   *
+    *    + Wanting to learn FreeRTOS or multitasking in general quickly       *
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+    *    + Wanting to improve your FreeRTOS skills and productivity           *
+    *                                                                         *
+    * then take a look at the FreeRTOS books - available as PDF or paperback  *
+    *                                                                         *
+    *        "Using the FreeRTOS Real Time Kernel - a Practical Guide"        *
+    *                  http://www.FreeRTOS.org/Documentation                  *
+    *                                                                         *
+    * A pdf reference manual is also available.  Both are usually delivered   *
+    * to your inbox within 20 minutes to two hours when purchased between 8am *
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+    * exceptional circumstances).  Thank you for your support!                *
+    *                                                                         *
+    ***************************************************************************
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
+    ***NOTE*** The exception to the GPL is included to allow you to distribute
+    a combined work that includes FreeRTOS without being obliged to provide the
+    source code for proprietary components outside of the FreeRTOS kernel.
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+    more details. You should have received a copy of the GNU General Public
+    License and the FreeRTOS license exception along with FreeRTOS; if not it
+    can be viewed here: http://www.freertos.org/a00114.html and also obtained
+    by writing to Richard Barry, contact details for whom are available on the
+    FreeRTOS WEB site.
+
+    1 tab == 4 spaces!
+
+    http://www.FreeRTOS.org - Documentation, latest information, license and
+    contact details.
+
+    http://www.SafeRTOS.com - A version that is certified for use in safety
+    critical systems.
+
+    http://www.OpenRTOS.com - Commercial support, development, porting,
+    licensing and training services.
+*/
+#include "msp430.h"
+#include "FreeRTOSConfig.h"
+#include "portasm.h"
+
+	IMPORT vTaskIncrementTick
+	IMPORT vTaskSwitchContext
+	IMPORT vPortSetupTimerInterrupt
+
+	EXPORT vTickISR
+	EXPORT vPortYield
+	EXPORT xPortStartScheduler
+	
+	RSEG CODE
+
+/*
+ * The RTOS tick ISR.
+ *
+ * If the cooperative scheduler is in use this simply increments the tick
+ * count.
+ *
+ * If the preemptive scheduler is in use a context switch can also occur.
+ */
+vTickISR:
+	portSAVE_CONTEXT
+				
+	calla	#vTaskIncrementTick
+
+	#if configUSE_PREEMPTION == 1
+		calla	#vTaskSwitchContext
+	#endif
+		
+	portRESTORE_CONTEXT
+/*-----------------------------------------------------------*/
+
+
+/*
+ * Manual context switch called by the portYIELD() macro.
+ */
+vPortYield:
+
+	/* Mimic an interrupt by pushing the SR. */
+	push	SR			
+
+	/* Now the SR is stacked we can disable interrupts. */
+	dint			
+				
+	/* Save the context of the current task. */
+	portSAVE_CONTEXT			
+
+	/* Switch to the highest priority task that is ready to run. */
+	calla	#vTaskSwitchContext		
+
+	/* Restore the context of the new task. */
+	portRESTORE_CONTEXT
+/*-----------------------------------------------------------*/
+
+
+/*
+ * Start off the scheduler by initialising the RTOS tick timer, then restoring
+ * the context of the first task.
+ */
+xPortStartScheduler:
+
+	/* Setup the hardware to generate the tick.  Interrupts are disabled
+	when this function is called. */
+	calla	#vPortSetupTimerInterrupt
+
+	/* Restore the context of the first task that is going to run. */
+	portRESTORE_CONTEXT
+/*-----------------------------------------------------------*/
+      		
+
+	/* Install vTickISR as the timer A0 interrupt. */
+	ASEG
+	ORG 0xFFE0 + configTICK_INTERRUPT_VECTOR
+	
+	_vTickISR_: DC16 vTickISR
+	
+
+	END
+